iio: adc: ad9361: Add option to set Reg Gain Step Config2 0x106 [D6:D4] #74
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This adds the option to set: [D6:D4]—Fast Attack Only. Decrement Step Size for: Small LPF Gain Change/Full Table Case If not set the value defaults to 2. Similar to PR #20 Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
commodo
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dbogdan
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assume the following setup on a single machine: 1. An openvswitch instance with one bridge and default flows 2. two network namespaces "server" and "client" 3. two ovs interfaces "server" and "client" on the bridge 4. for each ovs interface a veth pair with a matching name and 32 rx and tx queues 5. move the ends of the veth pairs to the respective network namespaces 6. assign ip addresses to each of the veth ends in the namespaces (needs to be the same subnet) 7. start some http server on the server network namespace 8. test if a client in the client namespace can reach the http server when following the actions below the host has a chance of getting a cpu stuck in a infinite loop: 1. send a large amount of parallel requests to the http server (around 3000 curls should work) 2. in parallel delete the network namespace (do not delete interfaces or stop the server, just kill the namespace) there is a low chance that this will cause the below kernel cpu stuck message. If this does not happen just retry. Below there is also the output of bpftrace for the functions mentioned in the output. The series of events happening here is: 1. the network namespace is deleted calling `unregister_netdevice_many_notify` somewhere in the process 2. this sets first `NETREG_UNREGISTERING` on both ends of the veth and then runs `synchronize_net` 3. it then calls `call_netdevice_notifiers` with `NETDEV_UNREGISTER` 4. this is then handled by `dp_device_event` which calls `ovs_netdev_detach_dev` (if a vport is found, which is the case for the veth interface attached to ovs) 5. this removes the rx_handlers of the device but does not prevent packages to be sent to the device 6. `dp_device_event` then queues the vport deletion to work in background as a ovs_lock is needed that we do not hold in the unregistration path 7. `unregister_netdevice_many_notify` continues to call `netdev_unregister_kobject` which sets `real_num_tx_queues` to 0 8. port deletion continues (but details are not relevant for this issue) 9. at some future point the background task deletes the vport If after 7. but before 9. a packet is send to the ovs vport (which is not deleted at this point in time) which forwards it to the `dev_queue_xmit` flow even though the device is unregistering. In `skb_tx_hash` (which is called in the `dev_queue_xmit`) path there is a while loop (if the packet has a rx_queue recorded) that is infinite if `dev->real_num_tx_queues` is zero. To prevent this from happening we update `do_output` to handle devices without carrier the same as if the device is not found (which would be the code path after 9. is done). Additionally we now produce a warning in `skb_tx_hash` if we will hit the infinite loop. bpftrace (first word is function name): __dev_queue_xmit server: real_num_tx_queues: 1, cpu: 2, pid: 28024, tid: 28024, skb_addr: 0xffff9edb6f207000, reg_state: 1 netdev_core_pick_tx server: addr: 0xffff9f0a46d4a000 real_num_tx_queues: 1, cpu: 2, pid: 28024, tid: 28024, skb_addr: 0xffff9edb6f207000, reg_state: 1 dp_device_event server: real_num_tx_queues: 1 cpu 9, pid: 21024, tid: 21024, event 2, reg_state: 1 synchronize_rcu_expedited: cpu 9, pid: 21024, tid: 21024 synchronize_rcu_expedited: cpu 9, pid: 21024, tid: 21024 synchronize_rcu_expedited: cpu 9, pid: 21024, tid: 21024 synchronize_rcu_expedited: cpu 9, pid: 21024, tid: 21024 dp_device_event server: real_num_tx_queues: 1 cpu 9, pid: 21024, tid: 21024, event 6, reg_state: 2 ovs_netdev_detach_dev server: real_num_tx_queues: 1 cpu 9, pid: 21024, tid: 21024, reg_state: 2 netdev_rx_handler_unregister server: real_num_tx_queues: 1, cpu: 9, pid: 21024, tid: 21024, reg_state: 2 synchronize_rcu_expedited: cpu 9, pid: 21024, tid: 21024 netdev_rx_handler_unregister ret server: real_num_tx_queues: 1, cpu: 9, pid: 21024, tid: 21024, reg_state: 2 dp_device_event server: real_num_tx_queues: 1 cpu 9, pid: 21024, tid: 21024, event 27, reg_state: 2 dp_device_event server: real_num_tx_queues: 1 cpu 9, pid: 21024, tid: 21024, event 22, reg_state: 2 dp_device_event server: real_num_tx_queues: 1 cpu 9, pid: 21024, tid: 21024, event 18, reg_state: 2 netdev_unregister_kobject: real_num_tx_queues: 1, cpu: 9, pid: 21024, tid: 21024 synchronize_rcu_expedited: cpu 9, pid: 21024, tid: 21024 ovs_vport_send server: real_num_tx_queues: 0, cpu: 2, pid: 28024, tid: 28024, skb_addr: 0xffff9edb6f207000, reg_state: 2 __dev_queue_xmit server: real_num_tx_queues: 0, cpu: 2, pid: 28024, tid: 28024, skb_addr: 0xffff9edb6f207000, reg_state: 2 netdev_core_pick_tx server: addr: 0xffff9f0a46d4a000 real_num_tx_queues: 0, cpu: 2, pid: 28024, tid: 28024, skb_addr: 0xffff9edb6f207000, reg_state: 2 broken device server: real_num_tx_queues: 0, cpu: 2, pid: 28024, tid: 28024 ovs_dp_detach_port server: real_num_tx_queues: 0 cpu 9, pid: 9124, tid: 9124, reg_state: 2 synchronize_rcu_expedited: cpu 9, pid: 33604, tid: 33604 stuck message: watchdog: BUG: soft lockup - CPU#5 stuck for 26s! [curl:1929279] Modules linked in: veth pktgen bridge stp llc ip_set_hash_net nft_counter xt_set nft_compat nf_tables ip_set_hash_ip ip_set nfnetlink_cttimeout nfnetlink openvswitch nsh nf_conncount nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 tls binfmt_misc nls_iso8859_1 input_leds joydev serio_raw dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua sch_fq_codel drm efi_pstore virtio_rng ip_tables x_tables autofs4 btrfs blake2b_generic zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear hid_generic usbhid hid crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel virtio_net ahci net_failover crypto_simd cryptd psmouse libahci virtio_blk failover CPU: 5 PID: 1929279 Comm: curl Not tainted 5.15.0-67-generic #74-Ubuntu Hardware name: OpenStack Foundation OpenStack Nova, BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 RIP: 0010:netdev_pick_tx+0xf1/0x320 Code: 00 00 8d 48 ff 0f b7 c1 66 39 ca 0f 86 e9 01 00 00 45 0f b7 ff 41 39 c7 0f 87 5b 01 00 00 44 29 f8 41 39 c7 0f 87 4f 01 00 00 <eb> f2 0f 1f 44 00 00 49 8b 94 24 28 04 00 00 48 85 d2 0f 84 53 01 RSP: 0018:ffffb78b40298820 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff9c8773adc2e0 RCX: 000000000000083f RDX: 0000000000000000 RSI: ffff9c8773adc2e0 RDI: ffff9c870a25e000 RBP: ffffb78b40298858 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff9c870a25e000 R13: ffff9c870a25e000 R14: ffff9c87fe043480 R15: 0000000000000000 FS: 00007f7b80008f00(0000) GS:ffff9c8e5f740000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7b80f6a0b0 CR3: 0000000329d66000 CR4: 0000000000350ee0 Call Trace: <IRQ> netdev_core_pick_tx+0xa4/0xb0 __dev_queue_xmit+0xf8/0x510 ? __bpf_prog_exit+0x1e/0x30 dev_queue_xmit+0x10/0x20 ovs_vport_send+0xad/0x170 [openvswitch] do_output+0x59/0x180 [openvswitch] do_execute_actions+0xa80/0xaa0 [openvswitch] ? kfree+0x1/0x250 ? kfree+0x1/0x250 ? kprobe_perf_func+0x4f/0x2b0 ? flow_lookup.constprop.0+0x5c/0x110 [openvswitch] ovs_execute_actions+0x4c/0x120 [openvswitch] ovs_dp_process_packet+0xa1/0x200 [openvswitch] ? ovs_ct_update_key.isra.0+0xa8/0x120 [openvswitch] ? ovs_ct_fill_key+0x1d/0x30 [openvswitch] ? ovs_flow_key_extract+0x2db/0x350 [openvswitch] ovs_vport_receive+0x77/0xd0 [openvswitch] ? __htab_map_lookup_elem+0x4e/0x60 ? bpf_prog_680e8aff8547aec1_kfree+0x3b/0x714 ? trace_call_bpf+0xc8/0x150 ? kfree+0x1/0x250 ? kfree+0x1/0x250 ? kprobe_perf_func+0x4f/0x2b0 ? kprobe_perf_func+0x4f/0x2b0 ? __mod_memcg_lruvec_state+0x63/0xe0 netdev_port_receive+0xc4/0x180 [openvswitch] ? netdev_port_receive+0x180/0x180 [openvswitch] netdev_frame_hook+0x1f/0x40 [openvswitch] __netif_receive_skb_core.constprop.0+0x23d/0xf00 __netif_receive_skb_one_core+0x3f/0xa0 __netif_receive_skb+0x15/0x60 process_backlog+0x9e/0x170 __napi_poll+0x33/0x180 net_rx_action+0x126/0x280 ? ttwu_do_activate+0x72/0xf0 __do_softirq+0xd9/0x2e7 ? rcu_report_exp_cpu_mult+0x1b0/0x1b0 do_softirq+0x7d/0xb0 </IRQ> <TASK> __local_bh_enable_ip+0x54/0x60 ip_finish_output2+0x191/0x460 __ip_finish_output+0xb7/0x180 ip_finish_output+0x2e/0xc0 ip_output+0x78/0x100 ? __ip_finish_output+0x180/0x180 ip_local_out+0x5e/0x70 __ip_queue_xmit+0x184/0x440 ? tcp_syn_options+0x1f9/0x300 ip_queue_xmit+0x15/0x20 __tcp_transmit_skb+0x910/0x9c0 ? __mod_memcg_state+0x44/0xa0 tcp_connect+0x437/0x4e0 ? ktime_get_with_offset+0x60/0xf0 tcp_v4_connect+0x436/0x530 __inet_stream_connect+0xd4/0x3a0 ? kprobe_perf_func+0x4f/0x2b0 ? aa_sk_perm+0x43/0x1c0 inet_stream_connect+0x3b/0x60 __sys_connect_file+0x63/0x70 __sys_connect+0xa6/0xd0 ? setfl+0x108/0x170 ? do_fcntl+0xe8/0x5a0 __x64_sys_connect+0x18/0x20 do_syscall_64+0x5c/0xc0 ? __x64_sys_fcntl+0xa9/0xd0 ? exit_to_user_mode_prepare+0x37/0xb0 ? syscall_exit_to_user_mode+0x27/0x50 ? do_syscall_64+0x69/0xc0 ? __sys_setsockopt+0xea/0x1e0 ? exit_to_user_mode_prepare+0x37/0xb0 ? syscall_exit_to_user_mode+0x27/0x50 ? __x64_sys_setsockopt+0x1f/0x30 ? do_syscall_64+0x69/0xc0 ? irqentry_exit+0x1d/0x30 ? exc_page_fault+0x89/0x170 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f7b8101c6a7 Code: 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2a 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 18 89 54 24 0c 48 89 34 24 89 RSP: 002b:00007ffffd6b2198 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7b8101c6a7 RDX: 0000000000000010 RSI: 00007ffffd6b2360 RDI: 0000000000000005 RBP: 0000561f1370d560 R08: 00002795ad21d1ac R09: 0030312e302e302e R10: 00007ffffd73f080 R11: 0000000000000246 R12: 0000561f1370c410 R13: 0000000000000000 R14: 0000000000000005 R15: 0000000000000000 </TASK> Fixes: 7f8a436 ("openvswitch: Add conntrack action") Co-developed-by: Luca Czesla <luca.czesla@mail.schwarz> Signed-off-by: Luca Czesla <luca.czesla@mail.schwarz> Signed-off-by: Felix Huettner <felix.huettner@mail.schwarz> Reviewed-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Simon Horman <simon.horman@corigine.com> Link: https://lore.kernel.org/r/ZC0pBXBAgh7c76CA@kernel-bug-kernel-bug Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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When completing emulation of instruction that generated a userspace exit for I/O, don't recheck L1 intercepts as KVM has already finished that phase of instruction execution, i.e. has already committed to allowing L2 to perform I/O. If L1 (or host userspace) modifies the I/O permission bitmaps during the exit to userspace, KVM will treat the access as being intercepted despite already having emulated the I/O access. Pivot on EMULTYPE_NO_DECODE to detect that KVM is completing emulation. Of the three users of EMULTYPE_NO_DECODE, only complete_emulated_io() (the intended "recipient") can reach the code in question. gp_interception()'s use is mutually exclusive with is_guest_mode(), and complete_emulated_insn_gp() unconditionally pairs EMULTYPE_NO_DECODE with EMULTYPE_SKIP. The bad behavior was detected by a syzkaller program that toggles port I/O interception during the userspace I/O exit, ultimately resulting in a WARN on vcpu->arch.pio.count being non-zero due to KVM no completing emulation of the I/O instruction. WARNING: CPU: 23 PID: 1083 at arch/x86/kvm/x86.c:8039 emulator_pio_in_out+0x154/0x170 [kvm] Modules linked in: kvm_intel kvm irqbypass CPU: 23 UID: 1000 PID: 1083 Comm: repro Not tainted 6.16.0-rc5-c1610d2d66b1-next-vm #74 NONE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:emulator_pio_in_out+0x154/0x170 [kvm] PKRU: 55555554 Call Trace: <TASK> kvm_fast_pio+0xd6/0x1d0 [kvm] vmx_handle_exit+0x149/0x610 [kvm_intel] kvm_arch_vcpu_ioctl_run+0xda8/0x1ac0 [kvm] kvm_vcpu_ioctl+0x244/0x8c0 [kvm] __x64_sys_ioctl+0x8a/0xd0 do_syscall_64+0x5d/0xc60 entry_SYSCALL_64_after_hwframe+0x4b/0x53 </TASK> Reported-by: syzbot+cc2032ba16cc2018ca25@syzkaller.appspotmail.com Closes: https://lore.kernel.org/all/68790db4.a00a0220.3af5df.0020.GAE@google.com Fixes: 8a76d7f ("KVM: x86: Add x86 callback for intercept check") Cc: stable@vger.kernel.org Cc: Jim Mattson <jmattson@google.com> Link: https://lore.kernel.org/r/20250715190638.1899116-1-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>
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…or slabobj_ext Even though obj_exts was created with the __GFP_NO_OBJ_EXT flag, objects in the same slab may have their extensions allocated via alloc_slab_obj_exts, and handle_failed_objexts_alloc may be called within alloc_slab_obj_exts to set their codetag to CODETAG_EMPTY. Therefore, both NULL and CODETAG_EMPTY are valid for the codetag of slabobj_ext, as we do not need to re-set it to CODETAG_EMPTY if it is already CODETAG_EMPTY. It also resolves the warning triggered when the codetag is CODETAG_EMPTY during slab freeing. This issue also occurred during our memory stress testing. The possibility of its occurrence should be as follows: When a slab allocates a slabobj_ext, the slab to which this slabobj_ext belongs may have already allocated its own slabobj_ext and called handle_failed_objexts_alloc. That is to say, the codetag of this slabobj_ext has been set to CODETAG_EMPTY. To quickly detect this WARN, I modified the code from:WARN_ON(slab_exts[offs].ref.ct) to WARN_ON(slab_exts[offs].ref.ct == 1); We then obtained this message: [21630.898561] ------------[ cut here ]------------ [21630.898596] kernel BUG at mm/slub.c:2050! [21630.898611] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP [21630.900372] Modules linked in: squashfs isofs vfio_iommu_type1 vhost_vsock vfio vhost_net vmw_vsock_virtio_transport_common vhost tap vhost_iotlb iommufd vsock binfmt_misc nfsv3 nfs_acl nfs lockd grace netfs tls rds dns_resolver tun brd overlay ntfs3 exfat btrfs blake2b_generic xor xor_neon raid6_pq loop sctp ip6_udp_tunnel udp_tunnel nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables rfkill ip_set sunrpc vfat fat joydev sg sch_fq_codel nfnetlink virtio_gpu sr_mod cdrom drm_client_lib virtio_dma_buf drm_shmem_helper drm_kms_helper drm ghash_ce backlight virtio_net virtio_blk virtio_scsi net_failover virtio_console failover virtio_mmio dm_mirror dm_region_hash dm_log dm_multipath dm_mod fuse i2c_dev virtio_pci virtio_pci_legacy_dev virtio_pci_modern_dev virtio virtio_ring autofs4 aes_neon_bs aes_ce_blk [last unloaded: hwpoison_inject] [21630.909177] CPU: 3 UID: 0 PID: 3787 Comm: kylin-process-m Kdump: loaded Tainted: G W 6.18.0-rc1+ #74 PREEMPT(voluntary) [21630.910495] Tainted: [W]=WARN [21630.910867] Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022 [21630.911625] pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [21630.912392] pc : __free_slab+0x228/0x250 [21630.912868] lr : __free_slab+0x18c/0x250[21630.913334] sp : ffff8000a02f73e0 [21630.913830] x29: ffff8000a02f73e0 x28: fffffdffc43fc800 x27: ffff0000c0011c40 [21630.914677] x26: ffff0000c000cac0 x25: ffff00010fe5e5f0 x24: ffff000102199b40 [21630.915469] x23: 0000000000000003 x22: 0000000000000003 x21: ffff0000c0011c40 [21630.916259] x20: fffffdffc4086600 x19: fffffdffc43fc800 x18: 0000000000000000 [21630.917048] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 [21630.917837] x14: 0000000000000000 x13: 0000000000000000 x12: ffff70001405ee66 [21630.918640] x11: 1ffff0001405ee65 x10: ffff70001405ee65 x9 : ffff800080a295dc [21630.919442] x8 : ffff8000a02f7330 x7 : 0000000000000000 x6 : 0000000000003000 [21630.920232] x5 : 0000000024924925 x4 : 0000000000000001 x3 : 0000000000000007 [21630.921021] x2 : 0000000000001b40 x1 : 000000000000001f x0 : 0000000000000001 [21630.921810] Call trace: [21630.922130] __free_slab+0x228/0x250 (P) [21630.922669] free_slab+0x38/0x118 [21630.923079] free_to_partial_list+0x1d4/0x340 [21630.923591] __slab_free+0x24c/0x348 [21630.924024] ___cache_free+0xf0/0x110 [21630.924468] qlist_free_all+0x78/0x130 [21630.924922] kasan_quarantine_reduce+0x114/0x148 [21630.925525] __kasan_slab_alloc+0x7c/0xb0 [21630.926006] kmem_cache_alloc_noprof+0x164/0x5c8 [21630.926699] __alloc_object+0x44/0x1f8 [21630.927153] __create_object+0x34/0xc8 [21630.927604] kmemleak_alloc+0xb8/0xd8 [21630.928052] kmem_cache_alloc_noprof+0x368/0x5c8 [21630.928606] getname_flags.part.0+0xa4/0x610 [21630.929112] getname_flags+0x80/0xd8 [21630.929557] vfs_fstatat+0xc8/0xe0 [21630.929975] __do_sys_newfstatat+0xa0/0x100 [21630.930469] __arm64_sys_newfstatat+0x90/0xd8 [21630.931046] invoke_syscall+0xd4/0x258 [21630.931685] el0_svc_common.constprop.0+0xb4/0x240 [21630.932467] do_el0_svc+0x48/0x68 [21630.932972] el0_svc+0x40/0xe0 [21630.933472] el0t_64_sync_handler+0xa0/0xe8 [21630.934151] el0t_64_sync+0x1ac/0x1b0 [21630.934923] Code: aa1803e0 97ffef2b a9446bf9 17ffff9c (d4210000) [21630.936461] SMP: stopping secondary CPUs [21630.939550] Starting crashdump kernel... [21630.940108] Bye! Link: https://lkml.kernel.org/r/20251027085214.184672-1-hao.ge@linux.dev Fixes: 09c4656 ("codetag: debug: introduce OBJEXTS_ALLOC_FAIL to mark failed slab_ext allocations") Signed-off-by: Hao Ge <gehao@kylinos.cn> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Christoph Lameter (Ampere) <cl@gentwo.org> Cc: David Rientjes <rientjes@google.com> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Shakeel Butt <shakeel.butt@linux.dev> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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…or slabobj_ext When alloc_slab_obj_exts() fails and then later succeeds in allocating a slab extension vector, it calls handle_failed_objexts_alloc() to mark all objects in the vector as empty. As a result all objects in this slab (slabA) will have their extensions set to CODETAG_EMPTY. Later on if this slabA is used to allocate a slabobj_ext vector for another slab (slabB), we end up with the slabB->obj_exts pointing to a slabobj_ext vector that itself has a non-NULL slabobj_ext equal to CODETAG_EMPTY. When slabB gets freed, free_slab_obj_exts() is called to free slabB->obj_exts vector. free_slab_obj_exts() calls mark_objexts_empty(slabB->obj_exts) which will generate a warning because it expects slabobj_ext vectors to have a NULL obj_ext, not CODETAG_EMPTY. Modify mark_objexts_empty() to skip the warning and setting the obj_ext value if it's already set to CODETAG_EMPTY. To quickly detect this WARN, I modified the code from:WARN_ON(slab_exts[offs].ref.ct) to WARN_ON(slab_exts[offs].ref.ct == 1); We then obtained this message: [21630.898561] ------------[ cut here ]------------ [21630.898596] kernel BUG at mm/slub.c:2050! [21630.898611] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP [21630.900372] Modules linked in: squashfs isofs vfio_iommu_type1 vhost_vsock vfio vhost_net vmw_vsock_virtio_transport_common vhost tap vhost_iotlb iommufd vsock binfmt_misc nfsv3 nfs_acl nfs lockd grace netfs tls rds dns_resolver tun brd overlay ntfs3 exfat btrfs blake2b_generic xor xor_neon raid6_pq loop sctp ip6_udp_tunnel udp_tunnel nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables rfkill ip_set sunrpc vfat fat joydev sg sch_fq_codel nfnetlink virtio_gpu sr_mod cdrom drm_client_lib virtio_dma_buf drm_shmem_helper drm_kms_helper drm ghash_ce backlight virtio_net virtio_blk virtio_scsi net_failover virtio_console failover virtio_mmio dm_mirror dm_region_hash dm_log dm_multipath dm_mod fuse i2c_dev virtio_pci virtio_pci_legacy_dev virtio_pci_modern_dev virtio virtio_ring autofs4 aes_neon_bs aes_ce_blk [last unloaded: hwpoison_inject] [21630.909177] CPU: 3 UID: 0 PID: 3787 Comm: kylin-process-m Kdump: loaded Tainted: G W 6.18.0-rc1+ #74 PREEMPT(voluntary) [21630.910495] Tainted: [W]=WARN [21630.910867] Hardware name: QEMU KVM Virtual Machine, BIOS unknown 2/2/2022 [21630.911625] pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [21630.912392] pc : __free_slab+0x228/0x250 [21630.912868] lr : __free_slab+0x18c/0x250[21630.913334] sp : ffff8000a02f73e0 [21630.913830] x29: ffff8000a02f73e0 x28: fffffdffc43fc800 x27: ffff0000c0011c40 [21630.914677] x26: ffff0000c000cac0 x25: ffff00010fe5e5f0 x24: ffff000102199b40 [21630.915469] x23: 0000000000000003 x22: 0000000000000003 x21: ffff0000c0011c40 [21630.916259] x20: fffffdffc4086600 x19: fffffdffc43fc800 x18: 0000000000000000 [21630.917048] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 [21630.917837] x14: 0000000000000000 x13: 0000000000000000 x12: ffff70001405ee66 [21630.918640] x11: 1ffff0001405ee65 x10: ffff70001405ee65 x9 : ffff800080a295dc [21630.919442] x8 : ffff8000a02f7330 x7 : 0000000000000000 x6 : 0000000000003000 [21630.920232] x5 : 0000000024924925 x4 : 0000000000000001 x3 : 0000000000000007 [21630.921021] x2 : 0000000000001b40 x1 : 000000000000001f x0 : 0000000000000001 [21630.921810] Call trace: [21630.922130] __free_slab+0x228/0x250 (P) [21630.922669] free_slab+0x38/0x118 [21630.923079] free_to_partial_list+0x1d4/0x340 [21630.923591] __slab_free+0x24c/0x348 [21630.924024] ___cache_free+0xf0/0x110 [21630.924468] qlist_free_all+0x78/0x130 [21630.924922] kasan_quarantine_reduce+0x114/0x148 [21630.925525] __kasan_slab_alloc+0x7c/0xb0 [21630.926006] kmem_cache_alloc_noprof+0x164/0x5c8 [21630.926699] __alloc_object+0x44/0x1f8 [21630.927153] __create_object+0x34/0xc8 [21630.927604] kmemleak_alloc+0xb8/0xd8 [21630.928052] kmem_cache_alloc_noprof+0x368/0x5c8 [21630.928606] getname_flags.part.0+0xa4/0x610 [21630.929112] getname_flags+0x80/0xd8 [21630.929557] vfs_fstatat+0xc8/0xe0 [21630.929975] __do_sys_newfstatat+0xa0/0x100 [21630.930469] __arm64_sys_newfstatat+0x90/0xd8 [21630.931046] invoke_syscall+0xd4/0x258 [21630.931685] el0_svc_common.constprop.0+0xb4/0x240 [21630.932467] do_el0_svc+0x48/0x68 [21630.932972] el0_svc+0x40/0xe0 [21630.933472] el0t_64_sync_handler+0xa0/0xe8 [21630.934151] el0t_64_sync+0x1ac/0x1b0 [21630.934923] Code: aa1803e0 97ffef2b a9446bf9 17ffff9c (d4210000) [21630.936461] SMP: stopping secondary CPUs [21630.939550] Starting crashdump kernel... [21630.940108] Bye! Link: https://lkml.kernel.org/r/20251029014317.1533488-1-hao.ge@linux.dev Fixes: 09c4656 ("codetag: debug: introduce OBJEXTS_ALLOC_FAIL to mark failed slab_ext allocations") Signed-off-by: Hao Ge <gehao@kylinos.cn> Reviewed-by: Suren Baghdasaryan <surenb@google.com> Cc: Christoph Lameter (Ampere) <cl@gentwo.org> Cc: David Rientjes <rientjes@google.com> Cc: gehao <gehao@kylinos.cn> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Shakeel Butt <shakeel.butt@linux.dev> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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This adds the option to set: [D6:D4]—Fast Attack Only.
Decrement Step Size for: Small LPF Gain Change/Full Table Case
If not set the value defaults to 2.
Similar to PR #20
Signed-off-by: Michael Hennerich michael.hennerich@analog.com