rk3288 Firefly Kernel Modules #22
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You should search the online guides....... There is no differences with this kernel. The reason why this kernel didn't build kernel modules is that rockchip_linux_defconfig configure all modules as built-in modules. |
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Apr 27, 2019
Function ib_create_qp() was failing to return an error when rdma_rw_init_mrs() fails, causing a crash further down in ib_create_qp() when trying to dereferece the qp pointer which was actually a negative errno. The crash: crash> log|grep BUG [ 136.458121] BUG: unable to handle kernel NULL pointer dereference at 0000000000000098 crash> bt PID: 3736 TASK: ffff8808543215c0 CPU: 2 COMMAND: "kworker/u64:2" #0 [ffff88084d323340] machine_kexec at ffffffff8105fbb0 FireflyTeam#1 [ffff88084d3233b0] __crash_kexec at ffffffff81116758 FireflyTeam#2 [ffff88084d323480] crash_kexec at ffffffff8111682d FireflyTeam#3 [ffff88084d3234b0] oops_end at ffffffff81032bd6 FireflyTeam#4 [ffff88084d3234e0] no_context at ffffffff8106e431 FireflyTeam#5 [ffff88084d323530] __bad_area_nosemaphore at ffffffff8106e610 FireflyTeam#6 [ffff88084d323590] bad_area_nosemaphore at ffffffff8106e6f4 FireflyTeam#7 [ffff88084d3235a0] __do_page_fault at ffffffff8106ebdc FireflyTeam#8 [ffff88084d323620] do_page_fault at ffffffff8106f057 FireflyTeam#9 [ffff88084d323660] page_fault at ffffffff816e3148 [exception RIP: ib_create_qp+427] RIP: ffffffffa02554fb RSP: ffff88084d323718 RFLAGS: 00010246 RAX: 0000000000000004 RBX: fffffffffffffff4 RCX: 000000018020001f RDX: ffff880830997fc0 RSI: 0000000000000001 RDI: ffff88085f407200 RBP: ffff88084d323778 R8: 0000000000000001 R9: ffffea0020bae210 R10: ffffea0020bae218 R11: 0000000000000001 R12: ffff88084d3237c8 R13: 00000000fffffff4 R14: ffff880859fa5000 R15: ffff88082eb89800 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 FireflyTeam#10 [ffff88084d323780] rdma_create_qp at ffffffffa0782681 [rdma_cm] FireflyTeam#11 [ffff88084d3237b0] nvmet_rdma_create_queue_ib at ffffffffa07c43f3 [nvmet_rdma] FireflyTeam#12 [ffff88084d323860] nvmet_rdma_alloc_queue at ffffffffa07c5ba9 [nvmet_rdma] FireflyTeam#13 [ffff88084d323900] nvmet_rdma_queue_connect at ffffffffa07c5c96 [nvmet_rdma] FireflyTeam#14 [ffff88084d323980] nvmet_rdma_cm_handler at ffffffffa07c6450 [nvmet_rdma] FireflyTeam#15 [ffff88084d3239b0] iw_conn_req_handler at ffffffffa0787480 [rdma_cm] FireflyTeam#16 [ffff88084d323a60] cm_conn_req_handler at ffffffffa0775f06 [iw_cm] rockchip-linux#17 [ffff88084d323ab0] process_event at ffffffffa0776019 [iw_cm] rockchip-linux#18 [ffff88084d323af0] cm_work_handler at ffffffffa0776170 [iw_cm] rockchip-linux#19 [ffff88084d323cb0] process_one_work at ffffffff810a1483 rockchip-linux#20 [ffff88084d323d90] worker_thread at ffffffff810a211d rockchip-linux#21 [ffff88084d323ec0] kthread at ffffffff810a6c5c rockchip-linux#22 [ffff88084d323f50] ret_from_fork at ffffffff816e1ebf Fixes: 632bc3f ("IB/core, RDMA RW API: Do not exceed QP SGE send limit") Signed-off-by: Steve Wise <swise@opengridcomputing.com> Cc: stable@vger.kernel.org Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
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Jun 2, 2019
There have been several reports over the years of NULL pointer
dereferences in xfs_trans_log_inode during xfs_fsr processes,
when the process is doing an fput and tearing down extents
on the temporary inode, something like:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
PID: 29439 TASK: ffff880550584fa0 CPU: 6 COMMAND: "xfs_fsr"
[exception RIP: xfs_trans_log_inode+0x10]
FireflyTeam#9 [ffff8800a57bbbe0] xfs_bunmapi at ffffffffa037398e [xfs]
FireflyTeam#10 [ffff8800a57bbce8] xfs_itruncate_extents at ffffffffa0391b29 [xfs]
FireflyTeam#11 [ffff8800a57bbd88] xfs_inactive_truncate at ffffffffa0391d0c [xfs]
FireflyTeam#12 [ffff8800a57bbdb8] xfs_inactive at ffffffffa0392508 [xfs]
FireflyTeam#13 [ffff8800a57bbdd8] xfs_fs_evict_inode at ffffffffa035907e [xfs]
FireflyTeam#14 [ffff8800a57bbe00] evict at ffffffff811e1b67
FireflyTeam#15 [ffff8800a57bbe28] iput at ffffffff811e23a5
FireflyTeam#16 [ffff8800a57bbe58] dentry_kill at ffffffff811dcfc8
rockchip-linux#17 [ffff8800a57bbe88] dput at ffffffff811dd06c
rockchip-linux#18 [ffff8800a57bbea8] __fput at ffffffff811c823b
rockchip-linux#19 [ffff8800a57bbef0] ____fput at ffffffff811c846e
rockchip-linux#20 [ffff8800a57bbf00] task_work_run at ffffffff81093b27
rockchip-linux#21 [ffff8800a57bbf30] do_notify_resume at ffffffff81013b0c
rockchip-linux#22 [ffff8800a57bbf50] int_signal at ffffffff8161405d
As it turns out, this is because the i_itemp pointer, along
with the d_ops pointer, has been overwritten with zeros
when we tear down the extents during truncate. When the in-core
inode fork on the temporary inode used by xfs_fsr was originally
set up during the extent swap, we mistakenly looked at di_nextents
to determine whether all extents fit inline, but this misses extents
generated by speculative preallocation; we should be using if_bytes
instead.
This mistake corrupts the in-memory inode, and code in
xfs_iext_remove_inline eventually gets bad inputs, causing
it to memmove and memset incorrect ranges; this became apparent
because the two values in ifp->if_u2.if_inline_ext[1] contained
what should have been in d_ops and i_itemp; they were memmoved due
to incorrect array indexing and then the original locations
were zeroed with memset, again due to an array overrun.
Fix this by properly using i_df.if_bytes to determine the number
of extents, not di_nextents.
Thanks to dchinner for looking at this with me and spotting the
root cause.
Cc: stable@vger.kernel.org
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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Jul 18, 2019
As Eric Dumazet pointed out this also needs to be fixed in IPv6. v2: Contains the IPv6 tcp/Ipv6 dccp patches as well. We have seen a few incidents lately where a dst_enty has been freed with a dangling TCP socket reference (sk->sk_dst_cache) pointing to that dst_entry. If the conditions/timings are right a crash then ensues when the freed dst_entry is referenced later on. A Common crashing back trace is: FireflyTeam#8 [] page_fault at ffffffff8163e648 [exception RIP: __tcp_ack_snd_check+74] . . FireflyTeam#9 [] tcp_rcv_established at ffffffff81580b64 FireflyTeam#10 [] tcp_v4_do_rcv at ffffffff8158b54a FireflyTeam#11 [] tcp_v4_rcv at ffffffff8158cd02 FireflyTeam#12 [] ip_local_deliver_finish at ffffffff815668f4 FireflyTeam#13 [] ip_local_deliver at ffffffff81566bd9 FireflyTeam#14 [] ip_rcv_finish at ffffffff8156656d FireflyTeam#15 [] ip_rcv at ffffffff81566f06 FireflyTeam#16 [] __netif_receive_skb_core at ffffffff8152b3a2 rockchip-linux#17 [] __netif_receive_skb at ffffffff8152b608 rockchip-linux#18 [] netif_receive_skb at ffffffff8152b690 rockchip-linux#19 [] vmxnet3_rq_rx_complete at ffffffffa015eeaf [vmxnet3] rockchip-linux#20 [] vmxnet3_poll_rx_only at ffffffffa015f32a [vmxnet3] rockchip-linux#21 [] net_rx_action at ffffffff8152bac2 rockchip-linux#22 [] __do_softirq at ffffffff81084b4f rockchip-linux#23 [] call_softirq at ffffffff8164845c rockchip-linux#24 [] do_softirq at ffffffff81016fc5 rockchip-linux#25 [] irq_exit at ffffffff81084ee5 rockchip-linux#26 [] do_IRQ at ffffffff81648ff8 Of course it may happen with other NIC drivers as well. It's found the freed dst_entry here: 224 static bool tcp_in_quickack_mode(struct sock *sk)↩ 225 {↩ 226 ▹ const struct inet_connection_sock *icsk = inet_csk(sk);↩ 227 ▹ const struct dst_entry *dst = __sk_dst_get(sk);↩ 228 ↩ 229 ▹ return (dst && dst_metric(dst, RTAX_QUICKACK)) ||↩ 230 ▹ ▹ (icsk->icsk_ack.quick && !icsk->icsk_ack.pingpong);↩ 231 }↩ But there are other backtraces attributed to the same freed dst_entry in netfilter code as well. All the vmcores showed 2 significant clues: - Remote hosts behind the default gateway had always been redirected to a different gateway. A rtable/dst_entry will be added for that host. Making more dst_entrys with lower reference counts. Making this more probable. - All vmcores showed a postitive LockDroppedIcmps value, e.g: LockDroppedIcmps 267 A closer look at the tcp_v4_err() handler revealed that do_redirect() will run regardless of whether user space has the socket locked. This can result in a race condition where the same dst_entry cached in sk->sk_dst_entry can be decremented twice for the same socket via: do_redirect()->__sk_dst_check()-> dst_release(). Which leads to the dst_entry being prematurely freed with another socket pointing to it via sk->sk_dst_cache and a subsequent crash. To fix this skip do_redirect() if usespace has the socket locked. Instead let the redirect take place later when user space does not have the socket locked. The dccp/IPv6 code is very similar in this respect, so fixing it there too. As Eric Garver pointed out the following commit now invalidates routes. Which can set the dst->obsolete flag so that ipv4_dst_check() returns null and triggers the dst_release(). Fixes: ceb3320 ("ipv4: Kill routes during PMTU/redirect updates.") Cc: Eric Garver <egarver@redhat.com> Cc: Hannes Sowa <hsowa@redhat.com> Signed-off-by: Jon Maxwell <jmaxwell37@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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The index is off-by-one when fp->aux->stack_depth has already been rounded up to 32. In particular, if stack_depth is 512, the index will be 16. The fix is to round_up and then takes -1 instead of round_down. [ 22.318680] ================================================================== [ 22.319745] BUG: KASAN: global-out-of-bounds in bpf_prog_select_runtime+0x48a/0x670 [ 22.320737] Read of size 8 at addr ffffffff82aadae0 by task sockex3/1946 [ 22.321646] [ 22.321858] CPU: 1 PID: 1946 Comm: sockex3 Tainted: G W 4.12.0-rc6-01680-g2ee87db3a287 rockchip-linux#22 [ 22.323061] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-1.el7.centos 04/01/2014 [ 22.324260] Call Trace: [ 22.324612] dump_stack+0x67/0x99 [ 22.325081] print_address_description+0x1e8/0x290 [ 22.325734] ? bpf_prog_select_runtime+0x48a/0x670 [ 22.326360] kasan_report+0x265/0x350 [ 22.326860] __asan_report_load8_noabort+0x19/0x20 [ 22.327484] bpf_prog_select_runtime+0x48a/0x670 [ 22.328109] bpf_prog_load+0x626/0xd40 [ 22.328637] ? __bpf_prog_charge+0xc0/0xc0 [ 22.329222] ? check_nnp_nosuid.isra.61+0x100/0x100 [ 22.329890] ? __might_fault+0xf6/0x1b0 [ 22.330446] ? lock_acquire+0x360/0x360 [ 22.331013] SyS_bpf+0x67c/0x24d0 [ 22.331491] ? trace_hardirqs_on+0xd/0x10 [ 22.332049] ? __getnstimeofday64+0xaf/0x1c0 [ 22.332635] ? bpf_prog_get+0x20/0x20 [ 22.333135] ? __audit_syscall_entry+0x300/0x600 [ 22.333770] ? syscall_trace_enter+0x540/0xdd0 [ 22.334339] ? exit_to_usermode_loop+0xe0/0xe0 [ 22.334950] ? do_syscall_64+0x48/0x410 [ 22.335446] ? bpf_prog_get+0x20/0x20 [ 22.335954] do_syscall_64+0x181/0x410 [ 22.336454] entry_SYSCALL64_slow_path+0x25/0x25 [ 22.337121] RIP: 0033:0x7f263fe81f19 [ 22.337618] RSP: 002b:00007ffd9a3440c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000141 [ 22.338619] RAX: ffffffffffffffda RBX: 0000000000aac5fb RCX: 00007f263fe81f19 [ 22.339600] RDX: 0000000000000030 RSI: 00007ffd9a3440d0 RDI: 0000000000000005 [ 22.340470] RBP: 0000000000a9a1e0 R08: 0000000000a9a1e0 R09: 0000009d00000001 [ 22.341430] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000010000 [ 22.342411] R13: 0000000000a9a023 R14: 0000000000000001 R15: 0000000000000003 [ 22.343369] [ 22.343593] The buggy address belongs to the variable: [ 22.344241] interpreters+0x80/0x980 [ 22.344708] [ 22.344908] Memory state around the buggy address: [ 22.345556] ffffffff82aad980: 00 00 00 04 fa fa fa fa 04 fa fa fa fa fa fa fa [ 22.346449] ffffffff82aada00: 00 00 00 00 00 fa fa fa fa fa fa fa 00 00 00 00 [ 22.347361] >ffffffff82aada80: 00 00 00 00 00 00 00 00 00 00 00 00 fa fa fa fa [ 22.348301] ^ [ 22.349142] ffffffff82aadb00: 00 01 fa fa fa fa fa fa 00 00 00 00 00 00 00 00 [ 22.350058] ffffffff82aadb80: 00 00 07 fa fa fa fa fa 00 00 05 fa fa fa fa fa [ 22.350984] ================================================================== Fixes: b870aa9 ("bpf: use different interpreter depending on required stack size") Signed-off-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Alexei Starovoitov <ast@fb.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
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Aug 17, 2019
This reverts commit aa8db49. Early demux structs can not be made const. Doing so results in: [ 84.967355] BUG: unable to handle kernel paging request at ffffffff81684b10 [ 84.969272] IP: proc_configure_early_demux+0x1e/0x3d [ 84.970544] PGD 1a0a067 [ 84.970546] P4D 1a0a067 [ 84.971212] PUD 1a0b063 [ 84.971733] PMD 80000000016001e1 [ 84.972669] Oops: 0003 [FireflyTeam#1] SMP [ 84.973065] Modules linked in: ip6table_filter ip6_tables veth vrf [ 84.973833] CPU: 0 PID: 955 Comm: sysctl Not tainted 4.13.0-rc6+ rockchip-linux#22 [ 84.974612] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014 [ 84.975855] task: ffff88003854ce00 task.stack: ffffc900005a4000 [ 84.976580] RIP: 0010:proc_configure_early_demux+0x1e/0x3d [ 84.977253] RSP: 0018:ffffc900005a7dd0 EFLAGS: 00010246 [ 84.977891] RAX: ffffffff81684b10 RBX: 0000000000000001 RCX: 0000000000000000 [ 84.978759] RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000000 [ 84.979628] RBP: ffffc900005a7dd0 R08: 0000000000000000 R09: 0000000000000000 [ 84.980501] R10: 0000000000000001 R11: 0000000000000008 R12: 0000000000000001 [ 84.981373] R13: ffffffffffffffea R14: ffffffff81a9b4c0 R15: 0000000000000002 [ 84.982249] FS: 00007feb237b7700(0000) GS:ffff88003fc00000(0000) knlGS:0000000000000000 [ 84.983231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 84.983941] CR2: ffffffff81684b10 CR3: 0000000038492000 CR4: 00000000000406f0 [ 84.984817] Call Trace: [ 84.985133] proc_tcp_early_demux+0x29/0x30 I think this is the second time such a patch has been reverted. Cc: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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In case of corrupt images, multiple interrupts may occur due to different error scenarios. Since we are removing the src and dest buffers in the first interrupt itself, crash occurs in the second error interrupts. Disable the global interrupt before we start processing the interrupt to avoid the crash. Disable System interrupt in isr to avoid the crash below. Unable to handle kernel NULL pointer dereference at virtual address 000000c8 pgd = ffffffc0007db000 [000000c8] *pgd=00000000fb006003, *pud=00000000fb006003, *pmd=00000000fb007003, *pte=0060000011001707 Internal error: Oops: 96000007 [FireflyTeam#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.18.0-next-20141210+ rockchip-linux#22 Hardware name: Samsung Exynos7 Espresso board based on EXYNOS7 (DT) task: ffffffc00075e5c0 ti: ffffffc00074c000 task.ti: ffffffc00074c000 PC is at exynos4_jpeg_irq+0x30/0x15c LR is at exynos4_jpeg_irq+0x2c/0x15c pc : [<ffffffc00040873c>] lr : [<ffffffc000408738>] pstate: 800001c5 sp : ffffffc00074fc60 x29: ffffffc00074fc60 x28: 0000004040000000 x27: ffffffc000673928 x26: ffffffc000673940 x25: ffffffc0007a030c x24: ffffffc0bb20a400 x23: 0000000000000030 x22: ffffffc0ba56ba40 x21: 0000000000000000 x20: 0000000000000000 x19: ffffffc0ba56ba18 x18: 0000000000000000 x17: 0000000000000000 x16: ffffffc00018b508 x15: 0000000000000000 x14: 0000000000000000 x13: 0098968000000000 x12: 0000000000989680 x11: 0000000000000004 x10: 0101010101010101 x9 : 00000020a285a9ea x8 : ffffffc0007af880 x7 : ffffffc0bac001a8 x6 : ffffffc0bac00000 x5 : 00000000fffffffa x4 : ffffffc00040870c x3 : 0000000000000003 x2 : 0000000000010003 x1 : 0000000000010002 x0 : 0000000000000000 Process swapper/0 (pid: 0, stack limit = 0xffffffc00074c058) Stack: (0xffffffc00074fc60 to 0xffffffc000750000) fc60: 0074fca0 ffffffc0 000e4508 ffffffc0 bb225300 ffffffc0 bb20a494 ffffffc0 fc80: 00000000 00000000 00000000 00000000 00000030 00000000 000f8c6c ffffffc0 fca0: 0074fd00 ffffffc0 000e4644 ffffffc0 bb20a400 ffffffc0 bb20a494 ffffffc0 fcc0: 00776a00 ffffffc0 00670da8 ffffffc0 00000000 00000000 00000001 00000000 fce0: bb008000 ffffffc0 407db000 00000000 00081230 ffffffc0 000e4638 ffffffc0 fd00: 0074fd40 ffffffc0 000e7338 ffffffc0 bb20a400 ffffffc0 bb20a494 ffffffc0 fd20: 00776a00 ffffffc0 000e7280 ffffffc0 bb225300 ffffffc0 000e72e0 ffffffc0 fd40: 0074fd70 ffffffc0 000e3d60 ffffffc0 00000030 00000000 00743000 ffffffc0 fd60: 0066e000 ffffffc0 006c2000 ffffffc0 0074fd90 ffffffc0 000e3e90 ffffffc0 fd80: 007437c8 ffffffc0 000e3e6c ffffffc0 0074fdf0 ffffffc0 00082404 ffffffc0 fda0: 0074fe20 ffffffc0 0075a000 ffffffc0 0000200c ffffff80 00002010 ffffff80 fdc0: 60000145 00000000 00672cc8 ffffffc0 407d9000 00000000 befb9b40 ffffffc0 fde0: 0074fe20 ffffffc0 000001d2 00000000 0074ff40 ffffffc0 00085da8 ffffffc0 fe00: 00758584 ffffffc0 0052c000 ffffffc0 0074ff40 ffffffc0 00087114 ffffffc0 fe20: 00000000 00000000 0074ff50 ffffffc0 0067d760 ffffffc0 befb9adc ffffffc0 fe40: 00000001 00000000 d4414200 00000020 d6a39c00 00000020 007a6a18 ffffffc0 fe60: 0075eb00 ffffffc0 0074fd60 ffffffc0 ffffc185 00000000 00000020 00000000 fe80: 0052d340 ffffffc0 00000030 00000000 fffffffe 0fffffff 00000000 00000000 fea0: 0018b508 ffffffc0 00000000 00000000 00000000 00000000 00758584 ffffffc0 fec0: 0052c000 ffffffc0 006c24e8 ffffffc0 007a030a ffffffc0 00000001 00000000 fee0: 00672cc8 ffffffc0 407d9000 00000000 407db000 00000000 00081230 ffffffc0 ff00: 40000000 00000040 0074ff40 ffffffc0 00087110 ffffffc0 0074ff40 ffffffc0 ff20: 00087114 ffffffc0 60000145 00000000 00758584 ffffffc0 0052c000 ffffffc0 ff40: 0074ff50 ffffffc0 000db568 ffffffc0 0074ff90 ffffffc0 00515fdc ffffffc0 ff60: 00758000 ffffffc0 007a3000 ffffffc0 007a3000 ffffffc0 befc8940 ffffffc0 ff80: 40760000 00000000 40000000 00000000 0074ffb0 ffffffc0 006ff998 ffffffc0 ffa0: 00000002 00000000 006ff988 ffffffc0 00000000 00000000 400826c0 00000000 ffc0: 8f03a688 00000000 00000e11 00000000 48000000 00000000 410fd030 00000000 ffe0: 0072c250 ffffffc0 00000000 00000000 00000000 00000000 00000000 00000000 Call trace: [<ffffffc00040873c>] exynos4_jpeg_irq+0x30/0x15c [<ffffffc0000e4504>] handle_irq_event_percpu+0x6c/0x160 [<ffffffc0000e4640>] handle_irq_event+0x48/0x78 [<ffffffc0000e7334>] handle_fasteoi_irq+0xe0/0x198 [<ffffffc0000e3d5c>] generic_handle_irq+0x24/0x40 [<ffffffc0000e3e8c>] __handle_domain_irq+0x80/0xf0 [<ffffffc000082400>] gic_handle_irq+0x30/0x80 Exception stack(0xffffffc00074fe00 to 0xffffffc00074ff20) fe00: 00758584 ffffffc0 0052c000 ffffffc0 0074ff40 ffffffc0 00087114 ffffffc0 fe20: 00000000 00000000 0074ff50 ffffffc0 0067d760 ffffffc0 befb9adc ffffffc0 fe40: 00000001 00000000 d4414200 00000020 d6a39c00 00000020 007a6a18 ffffffc0 fe60: 0075eb00 ffffffc0 0074fd60 ffffffc0 ffffc185 00000000 00000020 00000000 fe80: 0052d340 ffffffc0 00000030 00000000 fffffffe 0fffffff 00000000 00000000 fea0: 0018b508 ffffffc0 00000000 00000000 00000000 00000000 00758584 ffffffc0 fec0: 0052c000 ffffffc0 006c24e8 ffffffc0 007a030a ffffffc0 00000001 00000000 fee0: 00672cc8 ffffffc0 407d9000 00000000 407db000 00000000 00081230 ffffffc0 ff00: 40000000 00000040 0074ff40 ffffffc0 00087110 ffffffc0 0074ff40 ffffffc0 [<ffffffc000085da4>] el1_irq+0x64/0xd8 [<ffffffc0000db564>] cpu_startup_entry+0x118/0x168 [<ffffffc000515fd8>] rest_init+0x7c/0x88 [<ffffffc0006ff994>] start_kernel+0x3a8/0x3bc Code: 94045c34 f9406e60 97ffdc74 aa0003f4 (f9406400) ---[ end trace fa6dc0ea2efad21f ]--- Kernel panic - not syncing: Fatal exception in interrupt ---[ end Kernel panic - not syncing: Fatal exception in interrupt Signed-off-by: Tony K Nadackal <tony.kn@samsung.com> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Oct 5, 2019
Crash dump shows following instructions crash> bt PID: 0 TASK: ffffffffbe412480 CPU: 0 COMMAND: "swapper/0" #0 [ffff891ee0003868] machine_kexec at ffffffffbd063ef1 FireflyTeam#1 [ffff891ee00038c8] __crash_kexec at ffffffffbd12b6f2 FireflyTeam#2 [ffff891ee0003998] crash_kexec at ffffffffbd12c84c FireflyTeam#3 [ffff891ee00039b8] oops_end at ffffffffbd030f0a FireflyTeam#4 [ffff891ee00039e0] no_context at ffffffffbd074643 FireflyTeam#5 [ffff891ee0003a40] __bad_area_nosemaphore at ffffffffbd07496e FireflyTeam#6 [ffff891ee0003a90] bad_area_nosemaphore at ffffffffbd074a64 FireflyTeam#7 [ffff891ee0003aa0] __do_page_fault at ffffffffbd074b0a FireflyTeam#8 [ffff891ee0003b18] do_page_fault at ffffffffbd074fc8 FireflyTeam#9 [ffff891ee0003b50] page_fault at ffffffffbda01925 [exception RIP: qlt_schedule_sess_for_deletion+15] RIP: ffffffffc02e526f RSP: ffff891ee0003c08 RFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffc0307847 RDX: 00000000000020e6 RSI: ffff891edbc377c8 RDI: 0000000000000000 RBP: ffff891ee0003c18 R8: ffffffffc02f0b20 R9: 0000000000000250 R10: 0000000000000258 R11: 000000000000b780 R12: ffff891ed9b43000 R13: 00000000000000f0 R14: 0000000000000006 R15: ffff891edbc377c8 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 FireflyTeam#10 [ffff891ee0003c20] qla2x00_fcport_event_handler at ffffffffc02853d3 [qla2xxx] FireflyTeam#11 [ffff891ee0003cf0] __dta_qla24xx_async_gnl_sp_done_333 at ffffffffc0285a1d [qla2xxx] FireflyTeam#12 [ffff891ee0003de8] qla24xx_process_response_queue at ffffffffc02a2eb5 [qla2xxx] FireflyTeam#13 [ffff891ee0003e88] qla24xx_msix_rsp_q at ffffffffc02a5403 [qla2xxx] FireflyTeam#14 [ffff891ee0003ec0] __handle_irq_event_percpu at ffffffffbd0f4c59 FireflyTeam#15 [ffff891ee0003f10] handle_irq_event_percpu at ffffffffbd0f4e02 FireflyTeam#16 [ffff891ee0003f40] handle_irq_event at ffffffffbd0f4e90 rockchip-linux#17 [ffff891ee0003f68] handle_edge_irq at ffffffffbd0f8984 rockchip-linux#18 [ffff891ee0003f88] handle_irq at ffffffffbd0305d5 rockchip-linux#19 [ffff891ee0003fb8] do_IRQ at ffffffffbda02a18 --- <IRQ stack> --- rockchip-linux#20 [ffffffffbe403d30] ret_from_intr at ffffffffbda0094e [exception RIP: unknown or invalid address] RIP: 000000000000001f RSP: 0000000000000000 RFLAGS: fff3b8c2091ebb3f RAX: ffffbba5a0000200 RBX: 0000be8cdfa8f9fa RCX: 0000000000000018 RDX: 0000000000000101 RSI: 000000000000015d RDI: 0000000000000193 RBP: 0000000000000083 R8: ffffffffbe403e38 R9: 0000000000000002 R10: 0000000000000000 R11: ffffffffbe56b820 R12: ffff891ee001cf00 R13: ffffffffbd11c0a4 R14: ffffffffbe403d60 R15: 0000000000000001 ORIG_RAX: ffff891ee0022ac0 CS: 0000 SS: ffffffffffffffb9 bt: WARNING: possibly bogus exception frame rockchip-linux#21 [ffffffffbe403dd8] cpuidle_enter_state at ffffffffbd67c6fd rockchip-linux#22 [ffffffffbe403e40] cpuidle_enter at ffffffffbd67c907 rockchip-linux#23 [ffffffffbe403e50] call_cpuidle at ffffffffbd0d98f3 rockchip-linux#24 [ffffffffbe403e60] do_idle at ffffffffbd0d9b42 rockchip-linux#25 [ffffffffbe403e98] cpu_startup_entry at ffffffffbd0d9da3 rockchip-linux#26 [ffffffffbe403ec0] rest_init at ffffffffbd81d4aa rockchip-linux#27 [ffffffffbe403ed0] start_kernel at ffffffffbe67d2ca rockchip-linux#28 [ffffffffbe403f28] x86_64_start_reservations at ffffffffbe67c675 rockchip-linux#29 [ffffffffbe403f38] x86_64_start_kernel at ffffffffbe67c6eb rockchip-linux#30 [ffffffffbe403f50] secondary_startup_64 at ffffffffbd0000d5 Fixes: 040036b ("scsi: qla2xxx: Delay loop id allocation at login") Cc: <stable@vger.kernel.org> # v4.17+ Signed-off-by: Chuck Anderson <chuck.anderson@oracle.com> Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
fanck0605
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Apr 27, 2020
[ Upstream commit 1bc7896 ] When experimenting with bpf_send_signal() helper in our production environment (5.2 based), we experienced a deadlock in NMI mode: friendlyarm#5 [ffffc9002219f770] queued_spin_lock_slowpath at ffffffff8110be24 friendlyarm#6 [ffffc9002219f770] _raw_spin_lock_irqsave at ffffffff81a43012 friendlyarm#7 [ffffc9002219f780] try_to_wake_up at ffffffff810e7ecd friendlyarm#8 [ffffc9002219f7e0] signal_wake_up_state at ffffffff810c7b55 rockchip-linux#9 [ffffc9002219f7f0] __send_signal at ffffffff810c8602 rockchip-linux#10 [ffffc9002219f830] do_send_sig_info at ffffffff810ca31a rockchip-linux#11 [ffffc9002219f868] bpf_send_signal at ffffffff8119d227 rockchip-linux#12 [ffffc9002219f988] bpf_overflow_handler at ffffffff811d4140 rockchip-linux#13 [ffffc9002219f9e0] __perf_event_overflow at ffffffff811d68cf rockchip-linux#14 [ffffc9002219fa10] perf_swevent_overflow at ffffffff811d6a09 rockchip-linux#15 [ffffc9002219fa38] ___perf_sw_event at ffffffff811e0f47 rockchip-linux#16 [ffffc9002219fc30] __schedule at ffffffff81a3e04d rockchip-linux#17 [ffffc9002219fc90] schedule at ffffffff81a3e219 rockchip-linux#18 [ffffc9002219fca0] futex_wait_queue_me at ffffffff8113d1b9 rockchip-linux#19 [ffffc9002219fcd8] futex_wait at ffffffff8113e529 rockchip-linux#20 [ffffc9002219fdf0] do_futex at ffffffff8113ffbc rockchip-linux#21 [ffffc9002219fec0] __x64_sys_futex at ffffffff81140d1c rockchip-linux#22 [ffffc9002219ff38] do_syscall_64 at ffffffff81002602 rockchip-linux#23 [ffffc9002219ff50] entry_SYSCALL_64_after_hwframe at ffffffff81c00068 The above call stack is actually very similar to an issue reported by Commit eac9153 ("bpf/stackmap: Fix deadlock with rq_lock in bpf_get_stack()") by Song Liu. The only difference is bpf_send_signal() helper instead of bpf_get_stack() helper. The above deadlock is triggered with a perf_sw_event. Similar to Commit eac9153, the below almost identical reproducer used tracepoint point sched/sched_switch so the issue can be easily caught. /* stress_test.c */ #include <stdio.h> #include <stdlib.h> #include <sys/mman.h> #include <pthread.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #define THREAD_COUNT 1000 char *filename; void *worker(void *p) { void *ptr; int fd; char *pptr; fd = open(filename, O_RDONLY); if (fd < 0) return NULL; while (1) { struct timespec ts = {0, 1000 + rand() % 2000}; ptr = mmap(NULL, 4096 * 64, PROT_READ, MAP_PRIVATE, fd, 0); usleep(1); if (ptr == MAP_FAILED) { printf("failed to mmap\n"); break; } munmap(ptr, 4096 * 64); usleep(1); pptr = malloc(1); usleep(1); pptr[0] = 1; usleep(1); free(pptr); usleep(1); nanosleep(&ts, NULL); } close(fd); return NULL; } int main(int argc, char *argv[]) { void *ptr; int i; pthread_t threads[THREAD_COUNT]; if (argc < 2) return 0; filename = argv[1]; for (i = 0; i < THREAD_COUNT; i++) { if (pthread_create(threads + i, NULL, worker, NULL)) { fprintf(stderr, "Error creating thread\n"); return 0; } } for (i = 0; i < THREAD_COUNT; i++) pthread_join(threads[i], NULL); return 0; } and the following command: 1. run `stress_test /bin/ls` in one windown 2. hack bcc trace.py with the following change: # --- a/tools/trace.py # +++ b/tools/trace.py @@ -513,6 +513,7 @@ BPF_PERF_OUTPUT(%s); __data.tgid = __tgid; __data.pid = __pid; bpf_get_current_comm(&__data.comm, sizeof(__data.comm)); + bpf_send_signal(10); %s %s %s.perf_submit(%s, &__data, sizeof(__data)); 3. in a different window run ./trace.py -p $(pidof stress_test) t:sched:sched_switch The deadlock can be reproduced in our production system. Similar to Song's fix, the fix is to delay sending signal if irqs is disabled to avoid deadlocks involving with rq_lock. With this change, my above stress-test in our production system won't cause deadlock any more. I also implemented a scale-down version of reproducer in the selftest (a subsequent commit). With latest bpf-next, it complains for the following potential deadlock. [ 32.832450] -> friendlyarm#1 (&p->pi_lock){-.-.}: [ 32.833100] _raw_spin_lock_irqsave+0x44/0x80 [ 32.833696] task_rq_lock+0x2c/0xa0 [ 32.834182] task_sched_runtime+0x59/0xd0 [ 32.834721] thread_group_cputime+0x250/0x270 [ 32.835304] thread_group_cputime_adjusted+0x2e/0x70 [ 32.835959] do_task_stat+0x8a7/0xb80 [ 32.836461] proc_single_show+0x51/0xb0 ... [ 32.839512] -> #0 (&(&sighand->siglock)->rlock){....}: [ 32.840275] __lock_acquire+0x1358/0x1a20 [ 32.840826] lock_acquire+0xc7/0x1d0 [ 32.841309] _raw_spin_lock_irqsave+0x44/0x80 [ 32.841916] __lock_task_sighand+0x79/0x160 [ 32.842465] do_send_sig_info+0x35/0x90 [ 32.842977] bpf_send_signal+0xa/0x10 [ 32.843464] bpf_prog_bc13ed9e4d3163e3_send_signal_tp_sched+0x465/0x1000 [ 32.844301] trace_call_bpf+0x115/0x270 [ 32.844809] perf_trace_run_bpf_submit+0x4a/0xc0 [ 32.845411] perf_trace_sched_switch+0x10f/0x180 [ 32.846014] __schedule+0x45d/0x880 [ 32.846483] schedule+0x5f/0xd0 ... [ 32.853148] Chain exists of: [ 32.853148] &(&sighand->siglock)->rlock --> &p->pi_lock --> &rq->lock [ 32.853148] [ 32.854451] Possible unsafe locking scenario: [ 32.854451] [ 32.855173] CPU0 CPU1 [ 32.855745] ---- ---- [ 32.856278] lock(&rq->lock); [ 32.856671] lock(&p->pi_lock); [ 32.857332] lock(&rq->lock); [ 32.857999] lock(&(&sighand->siglock)->rlock); Deadlock happens on CPU0 when it tries to acquire &sighand->siglock but it has been held by CPU1 and CPU1 tries to grab &rq->lock and cannot get it. This is not exactly the callstack in our production environment, but sympotom is similar and both locks are using spin_lock_irqsave() to acquire the lock, and both involves rq_lock. The fix to delay sending signal when irq is disabled also fixed this issue. Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Cc: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20200304191104.2796501-1-yhs@fb.com Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
rkchrome
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Jul 22, 2020
'chrdev_open()' calls 'cdev_get()' to obtain a reference to the 'struct cdev *' stashed in the 'i_cdev' field of the target inode structure. If the pointer is NULL, then it is initialised lazily by looking up the kobject in the 'cdev_map' and so the whole procedure is protected by the 'cdev_lock' spinlock to serialise initialisation of the shared pointer. Unfortunately, it is possible for the initialising thread to fail *after* installing the new pointer, for example if the subsequent '->open()' call on the file fails. In this case, 'cdev_put()' is called, the reference count on the kobject is dropped and, if nobody else has taken a reference, the release function is called which finally clears 'inode->i_cdev' from 'cdev_purge()' before potentially freeing the object. The problem here is that a racing thread can happily take the 'cdev_lock' and see the non-NULL pointer in the inode, which can result in a refcount increment from zero and a warning: | ------------[ cut here ]------------ | refcount_t: addition on 0; use-after-free. | WARNING: CPU: 2 PID: 6385 at lib/refcount.c:25 refcount_warn_saturate+0x6d/0xf0 | Modules linked in: | CPU: 2 PID: 6385 Comm: repro Not tainted 5.5.0-rc2+ #22 | Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 | RIP: 0010:refcount_warn_saturate+0x6d/0xf0 | Code: 05 55 9a 15 01 01 e8 9d aa c8 ff 0f 0b c3 80 3d 45 9a 15 01 00 75 ce 48 c7 c7 00 9c 62 b3 c6 08 | RSP: 0018:ffffb524c1b9bc70 EFLAGS: 00010282 | RAX: 0000000000000000 RBX: ffff9e9da1f71390 RCX: 0000000000000000 | RDX: ffff9e9dbbd27618 RSI: ffff9e9dbbd18798 RDI: ffff9e9dbbd18798 | RBP: 0000000000000000 R08: 000000000000095f R09: 0000000000000039 | R10: 0000000000000000 R11: ffffb524c1b9bb20 R12: ffff9e9da1e8c700 | R13: ffffffffb25ee8b0 R14: 0000000000000000 R15: ffff9e9da1e8c700 | FS: 00007f3b87d26700(0000) GS:ffff9e9dbbd00000(0000) knlGS:0000000000000000 | CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 | CR2: 00007fc16909c000 CR3: 000000012df9c000 CR4: 00000000000006e0 | DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 | DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 | Call Trace: | kobject_get+0x5c/0x60 | cdev_get+0x2b/0x60 | chrdev_open+0x55/0x220 | ? cdev_put.part.3+0x20/0x20 | do_dentry_open+0x13a/0x390 | path_openat+0x2c8/0x1470 | do_filp_open+0x93/0x100 | ? selinux_file_ioctl+0x17f/0x220 | do_sys_open+0x186/0x220 | do_syscall_64+0x48/0x150 | entry_SYSCALL_64_after_hwframe+0x44/0xa9 | RIP: 0033:0x7f3b87efcd0e | Code: 89 54 24 08 e8 a3 f4 ff ff 8b 74 24 0c 48 8b 3c 24 41 89 c0 44 8b 54 24 08 b8 01 01 00 00 89 f4 | RSP: 002b:00007f3b87d259f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 | RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3b87efcd0e | RDX: 0000000000000000 RSI: 00007f3b87d25a80 RDI: 00000000ffffff9c | RBP: 00007f3b87d25e90 R08: 0000000000000000 R09: 0000000000000000 | R10: 0000000000000000 R11: 0000000000000293 R12: 00007ffe188f504e | R13: 00007ffe188f504f R14: 00007f3b87d26700 R15: 0000000000000000 | ---[ end trace 24f53ca58db8180a ]--- Since 'cdev_get()' can already fail to obtain a reference, simply move it over to use 'kobject_get_unless_zero()' instead of 'kobject_get()', which will cause the racing thread to return -ENXIO if the initialising thread fails unexpectedly. Cc: Hillf Danton <hdanton@sina.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Reported-by: syzbot+82defefbbd8527e1c2cb@syzkaller.appspotmail.com Signed-off-by: Will Deacon <will@kernel.org> Cc: stable <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20191219120203.32691-1-will@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Wenping Zhang <wenping.zhang@rock-chips.com> Change-Id: Idc4211025f422fdc4440a23ad491b5ccc459d4bd (cherry picked from commit 68faa67)
friendlyarm
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Aug 31, 2020
[ Upstream commit e24c644 ] I compiled with AddressSanitizer and I had these memory leaks while I was using the tep_parse_format function: Direct leak of 28 byte(s) in 4 object(s) allocated from: #0 0x7fb07db49ffe in __interceptor_realloc (/lib/x86_64-linux-gnu/libasan.so.5+0x10dffe) #1 0x7fb07a724228 in extend_token /home/pduplessis/repo/linux/tools/lib/traceevent/event-parse.c:985 #2 0x7fb07a724c21 in __read_token /home/pduplessis/repo/linux/tools/lib/traceevent/event-parse.c:1140 #3 0x7fb07a724f78 in read_token /home/pduplessis/repo/linux/tools/lib/traceevent/event-parse.c:1206 #4 0x7fb07a725191 in __read_expect_type /home/pduplessis/repo/linux/tools/lib/traceevent/event-parse.c:1291 #5 0x7fb07a7251df in read_expect_type /home/pduplessis/repo/linux/tools/lib/traceevent/event-parse.c:1299 #6 0x7fb07a72e6c8 in process_dynamic_array_len /home/pduplessis/repo/linux/tools/lib/traceevent/event-parse.c:2849 #7 0x7fb07a7304b8 in process_function /home/pduplessis/repo/linux/tools/lib/traceevent/event-parse.c:3161 #8 0x7fb07a730900 in process_arg_token /home/pduplessis/repo/linux/tools/lib/traceevent/event-parse.c:3207 rockchip-linux#9 0x7fb07a727c0b in process_arg /home/pduplessis/repo/linux/tools/lib/traceevent/event-parse.c:1786 rockchip-linux#10 0x7fb07a731080 in event_read_print_args /home/pduplessis/repo/linux/tools/lib/traceevent/event-parse.c:3285 rockchip-linux#11 0x7fb07a731722 in event_read_print /home/pduplessis/repo/linux/tools/lib/traceevent/event-parse.c:3369 rockchip-linux#12 0x7fb07a740054 in __tep_parse_format /home/pduplessis/repo/linux/tools/lib/traceevent/event-parse.c:6335 rockchip-linux#13 0x7fb07a74047a in __parse_event /home/pduplessis/repo/linux/tools/lib/traceevent/event-parse.c:6389 rockchip-linux#14 0x7fb07a740536 in tep_parse_format /home/pduplessis/repo/linux/tools/lib/traceevent/event-parse.c:6431 rockchip-linux#15 0x7fb07a785acf in parse_event ../../../src/fs-src/fs.c:251 rockchip-linux#16 0x7fb07a785ccd in parse_systems ../../../src/fs-src/fs.c:284 rockchip-linux#17 0x7fb07a786fb3 in read_metadata ../../../src/fs-src/fs.c:593 rockchip-linux#18 0x7fb07a78760e in ftrace_fs_source_init ../../../src/fs-src/fs.c:727 rockchip-linux#19 0x7fb07d90c19c in add_component_with_init_method_data ../../../../src/lib/graph/graph.c:1048 rockchip-linux#20 0x7fb07d90c87b in add_source_component_with_initialize_method_data ../../../../src/lib/graph/graph.c:1127 rockchip-linux#21 0x7fb07d90c92a in bt_graph_add_source_component ../../../../src/lib/graph/graph.c:1152 rockchip-linux#22 0x55db11aa632e in cmd_run_ctx_create_components_from_config_components ../../../src/cli/babeltrace2.c:2252 rockchip-linux#23 0x55db11aa6fda in cmd_run_ctx_create_components ../../../src/cli/babeltrace2.c:2347 rockchip-linux#24 0x55db11aa780c in cmd_run ../../../src/cli/babeltrace2.c:2461 rockchip-linux#25 0x55db11aa8a7d in main ../../../src/cli/babeltrace2.c:2673 rockchip-linux#26 0x7fb07d5460b2 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x270b2) The token variable in the process_dynamic_array_len function is allocated in the read_expect_type function, but is not freed before calling the read_token function. Free the token variable before calling read_token in order to plug the leak. Signed-off-by: Philippe Duplessis-Guindon <pduplessis@efficios.com> Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Link: https://lore.kernel.org/linux-trace-devel/20200730150236.5392-1-pduplessis@efficios.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
Joern-P
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Sep 6, 2020
Change-Id: I9f2c1b0d8d56a8d3da1774f51a4701212ac6ffff added IPGRE module to enable: (rockchip-linux#18) ip tunnel add grx mode gre Change-Id: I26bda9ece68f9f6be1277da0779076694d5d845c ayufan: rockchip_linux_defconfig compile ZRAM as module Change-Id: I2ee48973cb370130cc5d75008a07d5777c69208a ayufan: rockchip_defconfig: disable CONFIG_SCHED_WALT as it makes system unstable Change-Id: Id2a150311fcaad9f11127320558dc3caafb250e4 config: add more USB wifi chipsets (rockchip-linux#19) * Add some more USB wifi chipsets to default config. * Fix typo in default config. Added openvswitch kernel module compilation (rockchip-linux#22) ayufan: defconfig: add RK805 pinctrl Change-Id: I9144206544db4e86e73a4d553fb8db3aa194c619 ayufan: enable additional realtek devices Change-Id: Ie3598c47154b648540f161ad4aedd597bc33f83f config: Add support for modules/features requested by issues rockchip-linux#24 (AUTOFS4), rockchip-linux#54 (DRBD), rockchip-linux#64 (Multiple Routing Tables), rockchip-linux#87 (RTL8188EU), rockchip-linux#107 (iSCSI), rockchip-linux#148 (1-W GPIO) (rockchip-linux#24) ayufan: rtl8812au: add Edimax 600 USB adapter Add requested kernel modules/features for issue rockchip-linux#153 and LIRC, PPS GPIO support, remove wifi staging drivers. (rockchip-linux#25) Fix compile error (rockchip-linux#26) Multiple definition error due to midgard and bifrost both selected ayufan: defconfig: add a bunch of kernel modules Change-Id: I77f5c4809c35b6c74a3bb668487eba93a0a15169 ayufan: rockchip_wlan: revert changes Change-Id: I6aa0bbc24e2fdfb6da350ed167d59c4eea836c2a ayufan: defconfig: enable CONFIG_MEMTEST Change-Id: I82c3d1b2d35fb10172f891571ef600a692ac4e61 ayufan: defconfig: remove unusued kernel configs Change-Id: I2a4a2e5785dd5796bb7404718898127718b86425 ayufan: defconfig: enable initrd in bzip2/lzma/lzo/lz4 Change-Id: I88ea1f8127d8fdadf90dd4428a51a1582adc2687 ayufan: defconfig: enable PWM FAN Change-Id: I87a364e95d937c354e06eb41fead43d8d5cb0b4a external: defconfig: Add support for f2fs and crc32 (rockchip-linux#32) Add support for f2fs and it's dependency crc32 to rock64. This patch may or may not need to be included as well due to this bug https://bugs.debian.org/819725 A official patch was added by Debian https://salsa.debian.org/kernel-team/linux/blob/master/debian/patches/bugfix/all/fs-add-module_softdep-declarations-for-hard-coded-cr.patch external: defconfig: enable kernel modules for RBD and IPVS (rockchip-linux#33) external: defconfig: Make crc, crc32, f2fs to be compiled into kernel. (rockchip-linux#35) This changes crc, crc32, and f2fs to be compiled into the kernel instead of as module. This also fixes the issue of crc32-arm64 not being compiled due to a incorrect driver name. CONFIG_CRYPTO_CRC32_ARM64 became CONFIG_CRYPTO_CRC32_ARM64_CE in newer kernel sources. That's why I had to change that here. ayufan: defconfig: use CONFIG_HZ=250 Change-Id: I8009db93ee7c5af5e7804a004ab03d0ba97d20e2 CONFIG_SQUASHFS_XZ=y (rockchip-linux#41) cyberp: defconfig: squashfs xz for snap support defconfig: enable binfmt-misc (rockchip-linux#36) ayufan: defconfig: organize with savedefconfig ayufan: defconfig: support tehuti 10gbps adapter ayufan: defconfig: enable usb gadget via configfs ayufan: dts: compile-in audio codecs Change-Id: I7c70870395a10a0eafff006aabc17faf1d33355e
rkchrome
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Oct 10, 2020
[ Upstream commit 96298f6 ] According to Core Spec Version 5.2 | Vol 3, Part A 6.1.5, the incoming L2CAP_ConfigReq should be handled during OPEN state. The section below shows the btmon trace when running L2CAP/COS/CFD/BV-12-C before and after this change. === Before === ... > ACL Data RX: Handle 256 flags 0x02 dlen 12 #22 L2CAP: Connection Request (0x02) ident 2 len 4 PSM: 1 (0x0001) Source CID: 65 < ACL Data TX: Handle 256 flags 0x00 dlen 16 #23 L2CAP: Connection Response (0x03) ident 2 len 8 Destination CID: 64 Source CID: 65 Result: Connection successful (0x0000) Status: No further information available (0x0000) < ACL Data TX: Handle 256 flags 0x00 dlen 12 #24 L2CAP: Configure Request (0x04) ident 2 len 4 Destination CID: 65 Flags: 0x0000 > HCI Event: Number of Completed Packets (0x13) plen 5 #25 Num handles: 1 Handle: 256 Count: 1 > HCI Event: Number of Completed Packets (0x13) plen 5 #26 Num handles: 1 Handle: 256 Count: 1 > ACL Data RX: Handle 256 flags 0x02 dlen 16 #27 L2CAP: Configure Request (0x04) ident 3 len 8 Destination CID: 64 Flags: 0x0000 Option: Unknown (0x10) [hint] 01 00 .. < ACL Data TX: Handle 256 flags 0x00 dlen 18 #28 L2CAP: Configure Response (0x05) ident 3 len 10 Source CID: 65 Flags: 0x0000 Result: Success (0x0000) Option: Maximum Transmission Unit (0x01) [mandatory] MTU: 672 > HCI Event: Number of Completed Packets (0x13) plen 5 #29 Num handles: 1 Handle: 256 Count: 1 > ACL Data RX: Handle 256 flags 0x02 dlen 14 #30 L2CAP: Configure Response (0x05) ident 2 len 6 Source CID: 64 Flags: 0x0000 Result: Success (0x0000) > ACL Data RX: Handle 256 flags 0x02 dlen 20 #31 L2CAP: Configure Request (0x04) ident 3 len 12 Destination CID: 64 Flags: 0x0000 Option: Unknown (0x10) [hint] 01 00 91 02 11 11 ...... < ACL Data TX: Handle 256 flags 0x00 dlen 14 #32 L2CAP: Command Reject (0x01) ident 3 len 6 Reason: Invalid CID in request (0x0002) Destination CID: 64 Source CID: 65 > HCI Event: Number of Completed Packets (0x13) plen 5 #33 Num handles: 1 Handle: 256 Count: 1 ... === After === ... > ACL Data RX: Handle 256 flags 0x02 dlen 12 #22 L2CAP: Connection Request (0x02) ident 2 len 4 PSM: 1 (0x0001) Source CID: 65 < ACL Data TX: Handle 256 flags 0x00 dlen 16 #23 L2CAP: Connection Response (0x03) ident 2 len 8 Destination CID: 64 Source CID: 65 Result: Connection successful (0x0000) Status: No further information available (0x0000) < ACL Data TX: Handle 256 flags 0x00 dlen 12 #24 L2CAP: Configure Request (0x04) ident 2 len 4 Destination CID: 65 Flags: 0x0000 > HCI Event: Number of Completed Packets (0x13) plen 5 #25 Num handles: 1 Handle: 256 Count: 1 > HCI Event: Number of Completed Packets (0x13) plen 5 #26 Num handles: 1 Handle: 256 Count: 1 > ACL Data RX: Handle 256 flags 0x02 dlen 16 #27 L2CAP: Configure Request (0x04) ident 3 len 8 Destination CID: 64 Flags: 0x0000 Option: Unknown (0x10) [hint] 01 00 .. < ACL Data TX: Handle 256 flags 0x00 dlen 18 #28 L2CAP: Configure Response (0x05) ident 3 len 10 Source CID: 65 Flags: 0x0000 Result: Success (0x0000) Option: Maximum Transmission Unit (0x01) [mandatory] MTU: 672 > HCI Event: Number of Completed Packets (0x13) plen 5 #29 Num handles: 1 Handle: 256 Count: 1 > ACL Data RX: Handle 256 flags 0x02 dlen 14 #30 L2CAP: Configure Response (0x05) ident 2 len 6 Source CID: 64 Flags: 0x0000 Result: Success (0x0000) > ACL Data RX: Handle 256 flags 0x02 dlen 20 #31 L2CAP: Configure Request (0x04) ident 3 len 12 Destination CID: 64 Flags: 0x0000 Option: Unknown (0x10) [hint] 01 00 91 02 11 11 ..... < ACL Data TX: Handle 256 flags 0x00 dlen 18 #32 L2CAP: Configure Response (0x05) ident 3 len 10 Source CID: 65 Flags: 0x0000 Result: Success (0x0000) Option: Maximum Transmission Unit (0x01) [mandatory] MTU: 672 < ACL Data TX: Handle 256 flags 0x00 dlen 12 #33 L2CAP: Configure Request (0x04) ident 3 len 4 Destination CID: 65 Flags: 0x0000 > HCI Event: Number of Completed Packets (0x13) plen 5 #34 Num handles: 1 Handle: 256 Count: 1 > HCI Event: Number of Completed Packets (0x13) plen 5 #35 Num handles: 1 Handle: 256 Count: 1 ... Signed-off-by: Howard Chung <howardchung@google.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
friendlyarm
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Nov 17, 2020
[ Upstream commit 4ff753f ] When an UE or memory error exception is encountered the MCE handler tries to find the pfn using addr_to_pfn() which takes effective address as an argument, later pfn is used to poison the page where memory error occurred, recent rework in this area made addr_to_pfn to run in real mode, which can be fatal as it may try to access memory outside RMO region. Have two helper functions to separate things to be done in real mode and virtual mode without changing any functionality. This also fixes the following error as the use of addr_to_pfn is now moved to virtual mode. Without this change following kernel crash is seen on hitting UE. [ 485.128036] Oops: Kernel access of bad area, sig: 11 [#1] [ 485.128040] LE SMP NR_CPUS=2048 NUMA pSeries [ 485.128047] Modules linked in: [ 485.128067] CPU: 15 PID: 6536 Comm: insmod Kdump: loaded Tainted: G OE 5.7.0 rockchip-linux#22 [ 485.128074] NIP: c00000000009b24c LR: c0000000000398d8 CTR: c000000000cd57c0 [ 485.128078] REGS: c000000003f1f970 TRAP: 0300 Tainted: G OE (5.7.0) [ 485.128082] MSR: 8000000000001003 <SF,ME,RI,LE> CR: 28008284 XER: 00000001 [ 485.128088] CFAR: c00000000009b190 DAR: c0000001fab00000 DSISR: 40000000 IRQMASK: 1 [ 485.128088] GPR00: 0000000000000001 c000000003f1fbf0 c000000001634300 0000b0fa01000000 [ 485.128088] GPR04: d000000002220000 0000000000000000 00000000fab00000 0000000000000022 [ 485.128088] GPR08: c0000001fab00000 0000000000000000 c0000001fab00000 c000000003f1fc14 [ 485.128088] GPR12: 0000000000000008 c000000003ff5880 d000000002100008 0000000000000000 [ 485.128088] GPR16: 000000000000ff20 000000000000fff1 000000000000fff2 d0000000021a1100 [ 485.128088] GPR20: d000000002200000 c00000015c893c50 c000000000d49b28 c00000015c893c50 [ 485.128088] GPR24: d0000000021a0d08 c0000000014e5da8 d0000000021a0818 000000000000000a [ 485.128088] GPR28: 0000000000000008 000000000000000a c0000000017e2970 000000000000000a [ 485.128125] NIP [c00000000009b24c] __find_linux_pte+0x11c/0x310 [ 485.128130] LR [c0000000000398d8] addr_to_pfn+0x138/0x170 [ 485.128133] Call Trace: [ 485.128135] Instruction dump: [ 485.128138] 3929ffff 7d4a3378 7c883c36 7d2907b4 794a1564 7d294038 794af082 3900ffff [ 485.128144] 79291f24 790af00e 78e70020 7d095214 <7c69502a> 2fa30000 419e011c 70690040 [ 485.128152] ---[ end trace d34b27e29ae0e340 ]--- Fixes: 9ca766f ("powerpc/64s/pseries: machine check convert to use common event code") Signed-off-by: Ganesh Goudar <ganeshgr@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200724063946.21378-1-ganeshgr@linux.ibm.com Signed-off-by: Sasha Levin <sashal@kernel.org>
friendlyarm
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Aug 31, 2021
[ Upstream commit 5acc7d3 ] The problem occurs between dev_get_by_index() and dev_xdp_attach_link(). At this point, dev_xdp_uninstall() is called. Then xdp link will not be detached automatically when dev is released. But link->dev already points to dev, when xdp link is released, dev will still be accessed, but dev has been released. dev_get_by_index() | link->dev = dev | | rtnl_lock() | unregister_netdevice_many() | dev_xdp_uninstall() | rtnl_unlock() rtnl_lock(); | dev_xdp_attach_link() | rtnl_unlock(); | | netdev_run_todo() // dev released bpf_xdp_link_release() | /* access dev. | use-after-free */ | [ 45.966867] BUG: KASAN: use-after-free in bpf_xdp_link_release+0x3b8/0x3d0 [ 45.967619] Read of size 8 at addr ffff00000f9980c8 by task a.out/732 [ 45.968297] [ 45.968502] CPU: 1 PID: 732 Comm: a.out Not tainted 5.13.0+ rockchip-linux#22 [ 45.969222] Hardware name: linux,dummy-virt (DT) [ 45.969795] Call trace: [ 45.970106] dump_backtrace+0x0/0x4c8 [ 45.970564] show_stack+0x30/0x40 [ 45.970981] dump_stack_lvl+0x120/0x18c [ 45.971470] print_address_description.constprop.0+0x74/0x30c [ 45.972182] kasan_report+0x1e8/0x200 [ 45.972659] __asan_report_load8_noabort+0x2c/0x50 [ 45.973273] bpf_xdp_link_release+0x3b8/0x3d0 [ 45.973834] bpf_link_free+0xd0/0x188 [ 45.974315] bpf_link_put+0x1d0/0x218 [ 45.974790] bpf_link_release+0x3c/0x58 [ 45.975291] __fput+0x20c/0x7e8 [ 45.975706] ____fput+0x24/0x30 [ 45.976117] task_work_run+0x104/0x258 [ 45.976609] do_notify_resume+0x894/0xaf8 [ 45.977121] work_pending+0xc/0x328 [ 45.977575] [ 45.977775] The buggy address belongs to the page: [ 45.978369] page:fffffc00003e6600 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4f998 [ 45.979522] flags: 0x7fffe0000000000(node=0|zone=0|lastcpupid=0x3ffff) [ 45.980349] raw: 07fffe0000000000 fffffc00003e6708 ffff0000dac3c010 0000000000000000 [ 45.981309] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 45.982259] page dumped because: kasan: bad access detected [ 45.982948] [ 45.983153] Memory state around the buggy address: [ 45.983753] ffff00000f997f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 45.984645] ffff00000f998000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 45.985533] >ffff00000f998080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 45.986419] ^ [ 45.987112] ffff00000f998100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 45.988006] ffff00000f998180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 45.988895] ================================================================== [ 45.989773] Disabling lock debugging due to kernel taint [ 45.990552] Kernel panic - not syncing: panic_on_warn set ... [ 45.991166] CPU: 1 PID: 732 Comm: a.out Tainted: G B 5.13.0+ rockchip-linux#22 [ 45.991929] Hardware name: linux,dummy-virt (DT) [ 45.992448] Call trace: [ 45.992753] dump_backtrace+0x0/0x4c8 [ 45.993208] show_stack+0x30/0x40 [ 45.993627] dump_stack_lvl+0x120/0x18c [ 45.994113] dump_stack+0x1c/0x34 [ 45.994530] panic+0x3a4/0x7d8 [ 45.994930] end_report+0x194/0x198 [ 45.995380] kasan_report+0x134/0x200 [ 45.995850] __asan_report_load8_noabort+0x2c/0x50 [ 45.996453] bpf_xdp_link_release+0x3b8/0x3d0 [ 45.997007] bpf_link_free+0xd0/0x188 [ 45.997474] bpf_link_put+0x1d0/0x218 [ 45.997942] bpf_link_release+0x3c/0x58 [ 45.998429] __fput+0x20c/0x7e8 [ 45.998833] ____fput+0x24/0x30 [ 45.999247] task_work_run+0x104/0x258 [ 45.999731] do_notify_resume+0x894/0xaf8 [ 46.000236] work_pending+0xc/0x328 [ 46.000697] SMP: stopping secondary CPUs [ 46.001226] Dumping ftrace buffer: [ 46.001663] (ftrace buffer empty) [ 46.002110] Kernel Offset: disabled [ 46.002545] CPU features: 0x00000001,23202c00 [ 46.003080] Memory Limit: none Fixes: aa8d3a7 ("bpf, xdp: Add bpf_link-based XDP attachment API") Reported-by: Abaci <abaci@linux.alibaba.com> Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Reviewed-by: Dust Li <dust.li@linux.alibaba.com> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210710031635.41649-1-xuanzhuo@linux.alibaba.com Signed-off-by: Sasha Levin <sashal@kernel.org>
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Sep 18, 2021
'chrdev_open()' calls 'cdev_get()' to obtain a reference to the 'struct cdev *' stashed in the 'i_cdev' field of the target inode structure. If the pointer is NULL, then it is initialised lazily by looking up the kobject in the 'cdev_map' and so the whole procedure is protected by the 'cdev_lock' spinlock to serialise initialisation of the shared pointer. Unfortunately, it is possible for the initialising thread to fail *after* installing the new pointer, for example if the subsequent '->open()' call on the file fails. In this case, 'cdev_put()' is called, the reference count on the kobject is dropped and, if nobody else has taken a reference, the release function is called which finally clears 'inode->i_cdev' from 'cdev_purge()' before potentially freeing the object. The problem here is that a racing thread can happily take the 'cdev_lock' and see the non-NULL pointer in the inode, which can result in a refcount increment from zero and a warning: | ------------[ cut here ]------------ | refcount_t: addition on 0; use-after-free. | WARNING: CPU: 2 PID: 6385 at lib/refcount.c:25 refcount_warn_saturate+0x6d/0xf0 | Modules linked in: | CPU: 2 PID: 6385 Comm: repro Not tainted 5.5.0-rc2+ rockchip-linux#22 | Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 | RIP: 0010:refcount_warn_saturate+0x6d/0xf0 | Code: 05 55 9a 15 01 01 e8 9d aa c8 ff 0f 0b c3 80 3d 45 9a 15 01 00 75 ce 48 c7 c7 00 9c 62 b3 c6 08 | RSP: 0018:ffffb524c1b9bc70 EFLAGS: 00010282 | RAX: 0000000000000000 RBX: ffff9e9da1f71390 RCX: 0000000000000000 | RDX: ffff9e9dbbd27618 RSI: ffff9e9dbbd18798 RDI: ffff9e9dbbd18798 | RBP: 0000000000000000 R08: 000000000000095f R09: 0000000000000039 | R10: 0000000000000000 R11: ffffb524c1b9bb20 R12: ffff9e9da1e8c700 | R13: ffffffffb25ee8b0 R14: 0000000000000000 R15: ffff9e9da1e8c700 | FS: 00007f3b87d26700(0000) GS:ffff9e9dbbd00000(0000) knlGS:0000000000000000 | CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 | CR2: 00007fc16909c000 CR3: 000000012df9c000 CR4: 00000000000006e0 | DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 | DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 | Call Trace: | kobject_get+0x5c/0x60 | cdev_get+0x2b/0x60 | chrdev_open+0x55/0x220 | ? cdev_put.part.3+0x20/0x20 | do_dentry_open+0x13a/0x390 | path_openat+0x2c8/0x1470 | do_filp_open+0x93/0x100 | ? selinux_file_ioctl+0x17f/0x220 | do_sys_open+0x186/0x220 | do_syscall_64+0x48/0x150 | entry_SYSCALL_64_after_hwframe+0x44/0xa9 | RIP: 0033:0x7f3b87efcd0e | Code: 89 54 24 08 e8 a3 f4 ff ff 8b 74 24 0c 48 8b 3c 24 41 89 c0 44 8b 54 24 08 b8 01 01 00 00 89 f4 | RSP: 002b:00007f3b87d259f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 | RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3b87efcd0e | RDX: 0000000000000000 RSI: 00007f3b87d25a80 RDI: 00000000ffffff9c | RBP: 00007f3b87d25e90 R08: 0000000000000000 R09: 0000000000000000 | R10: 0000000000000000 R11: 0000000000000293 R12: 00007ffe188f504e | R13: 00007ffe188f504f R14: 00007f3b87d26700 R15: 0000000000000000 | ---[ end trace 24f53ca58db8180a ]--- Since 'cdev_get()' can already fail to obtain a reference, simply move it over to use 'kobject_get_unless_zero()' instead of 'kobject_get()', which will cause the racing thread to return -ENXIO if the initialising thread fails unexpectedly. Cc: Hillf Danton <hdanton@sina.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Reported-by: syzbot+82defefbbd8527e1c2cb@syzkaller.appspotmail.com Signed-off-by: Will Deacon <will@kernel.org> Cc: stable <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20191219120203.32691-1-will@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Wenping Zhang <wenping.zhang@rock-chips.com> Change-Id: Idc4211025f422fdc4440a23ad491b5ccc459d4bd (cherry picked from commit 68faa67)
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Nov 12, 2022
[ Upstream commit 8cfb085 ] Li Huafei reports that mcount-based ftrace with module PLTs was broken by commit: a625357 ("arm64: ftrace: consistently handle PLTs.") When a module PLTs are used and a module is loaded sufficiently far away from the kernel, we'll create PLTs for any branches which are out-of-range. These are separate from the special ftrace trampoline PLTs, which the module PLT code doesn't directly manipulate. When mcount is in use this is a problem, as each mcount callsite in a module will be initialized to point to a module PLT, but since commit a625357 ftrace_make_nop() will assume that the callsite has been initialized to point to the special ftrace trampoline PLT, and ftrace_find_callable_addr() rejects other cases. This means that when ftrace tries to initialize a callsite via ftrace_make_nop(), the call to ftrace_find_callable_addr() will find that the `_mcount` stub is out-of-range and is not handled by the ftrace PLT, resulting in a splat: | ftrace_test: loading out-of-tree module taints kernel. | ftrace: no module PLT for _mcount | ------------[ ftrace bug ]------------ | ftrace failed to modify | [<ffff800029180014>] 0xffff800029180014 | actual: 44:00:00:94 | Initializing ftrace call sites | ftrace record flags: 2000000 | (0) | expected tramp: ffff80000802eb3c | ------------[ cut here ]------------ | WARNING: CPU: 3 PID: 157 at kernel/trace/ftrace.c:2120 ftrace_bug+0x94/0x270 | Modules linked in: | CPU: 3 PID: 157 Comm: insmod Tainted: G O 6.0.0-rc6-00151-gcd722513a189-dirty rockchip-linux#22 | Hardware name: linux,dummy-virt (DT) | pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) | pc : ftrace_bug+0x94/0x270 | lr : ftrace_bug+0x21c/0x270 | sp : ffff80000b2bbaf0 | x29: ffff80000b2bbaf0 x28: 0000000000000000 x27: ffff0000c4d38000 | x26: 0000000000000001 x25: ffff800009d7e000 x24: ffff0000c4d86e00 | x23: 0000000002000000 x22: ffff80000a62b000 x21: ffff8000098ebea8 | x20: ffff0000c4d38000 x19: ffff80000aa24158 x18: ffffffffffffffff | x17: 0000000000000000 x16: 0a0d2d2d2d2d2d2d x15: ffff800009aa9118 | x14: 0000000000000000 x13: 6333626532303830 x12: 3030303866666666 | x11: 203a706d61727420 x10: 6465746365707865 x9 : 3362653230383030 | x8 : c0000000ffffefff x7 : 0000000000017fe8 x6 : 000000000000bff4 | x5 : 0000000000057fa8 x4 : 0000000000000000 x3 : 0000000000000001 | x2 : ad2cb14bb5438900 x1 : 0000000000000000 x0 : 0000000000000022 | Call trace: | ftrace_bug+0x94/0x270 | ftrace_process_locs+0x308/0x430 | ftrace_module_init+0x44/0x60 | load_module+0x15b4/0x1ce8 | __do_sys_init_module+0x1ec/0x238 | __arm64_sys_init_module+0x24/0x30 | invoke_syscall+0x54/0x118 | el0_svc_common.constprop.4+0x84/0x100 | do_el0_svc+0x3c/0xd0 | el0_svc+0x1c/0x50 | el0t_64_sync_handler+0x90/0xb8 | el0t_64_sync+0x15c/0x160 | ---[ end trace 0000000000000000 ]--- | ---------test_init----------- Fix this by reverting to the old behaviour of ignoring the old instruction when initialising an mcount callsite in a module, which was the behaviour prior to commit a625357. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Fixes: a625357 ("arm64: ftrace: consistently handle PLTs.") Reported-by: Li Huafei <lihuafei1@huawei.com> Link: https://lore.kernel.org/linux-arm-kernel/20220929094134.99512-1-lihuafei1@huawei.com Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20220929134525.798593-1-mark.rutland@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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Hi,
I see that the kernel is not going to build in your build script.
I remembered from past that we use Android libhybris and mount it as /system to get access to modules!
Is it still the case?
If not, why we do not build kernel modules?
If we create them, does it work on Firefly board?
I do appreciate if you explain me in detail to understand how the modules work on Firefly with your Kernel!
Thanks
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