Mele A2000 kernel panic after commit 9b1b6112465d3fa575966970f315de2c4a023ee1 #64

pqlaz · 2012-08-08T14:40:23Z

Use the default configuration sun4i_defconfig, allwinner-v3.0-android-v2 branch

Boot log: http://pastebin.com/swiKLA90

If you replace the files

drivers/block/sun4i_nand/nfd/mbr.c
drivers/block/sun4i_nand/nfd/nand_blk.c

on their previous version, the kernel is loaded properly

sorry for my english

amery · 2012-08-08T15:54:29Z

very strange, I can't image anything in 9b1b611 affecting wemac_probe's gpio_request()s

pqlaz · 2012-08-15T18:03:38Z

Bug occurs when an assembly using binary version of Linaro toolchain (https://launchpad.net/linaro-toolchain-binaries/trunk/2012.07). If compile Linaro toolchain with crosstool-ng, kernel boots normally.

amery · 2012-08-15T18:39:15Z

can you test linaro's toolchain with a clean tree?

pqlaz · 2012-08-15T20:44:19Z

what is meant by "clean tree"?

amery · 2012-08-16T05:41:58Z

basically to run 'make clean' first

pqlaz · 2012-08-16T17:25:59Z

Strange. Now, the bug does not occur. I cleaned the tree before building up to this. Maybe it's a hardware problem

Since the Guest is in ring 1, it can't read the debug registers: doing so gives a number of nasty messages: (gdb) run Starting program: /bin/sleep [ 31.170230] general protection fault: 0000 [#1] SMP [ 31.170230] Modules linked in: [ 31.170230] CPU: 0 PID: 2678 Comm: sleep Not tainted 3.11.0+ #64 [ 31.170230] task: cc5c09b0 ti: cc79c000 task.ti: cc79c000 [ 31.170230] EIP: 0061:[<c01333d8>] EFLAGS: 00000097 CPU: 0 [ 31.170230] EIP is at native_get_debugreg+0x58/0x70 [ 31.170230] EAX: 00000006 EBX: cc79dfb4 ECX: b7fff918 EDX: 00000000 [ 31.170230] ESI: cc5c09b0 EDI: 00000000 EBP: cc79df84 ESP: cc79df84 [ 31.170230] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0069 [ 31.170230] CR0: 00000008 CR2: 081ba69a CR3: 0e2f2000 CR4: 00000000 Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

Turn it into (for example): [ 0.073380] x86: Booting SMP configuration: [ 0.074005] .... node #0, CPUs: #1 #2 #3 #4 #5 #6 #7 [ 0.603005] .... node #1, CPUs: #8 #9 #10 #11 #12 #13 #14 #15 [ 1.200005] .... node #2, CPUs: #16 #17 #18 #19 #20 #21 #22 #23 [ 1.796005] .... node #3, CPUs: #24 #25 #26 #27 #28 #29 #30 #31 [ 2.393005] .... node #4, CPUs: #32 #33 #34 #35 #36 #37 #38 #39 [ 2.996005] .... node #5, CPUs: #40 #41 #42 #43 #44 #45 #46 #47 [ 3.600005] .... node #6, CPUs: #48 #49 #50 #51 #52 #53 #54 #55 [ 4.202005] .... node #7, CPUs: #56 #57 #58 #59 #60 #61 #62 #63 [ 4.811005] .... node #8, CPUs: #64 #65 #66 #67 #68 #69 #70 #71 [ 5.421006] .... node #9, CPUs: #72 #73 #74 #75 #76 #77 #78 #79 [ 6.032005] .... node #10, CPUs: #80 #81 #82 #83 #84 #85 #86 #87 [ 6.648006] .... node #11, CPUs: #88 #89 #90 #91 #92 #93 #94 #95 [ 7.262005] .... node #12, CPUs: #96 #97 #98 #99 #100 #101 #102 #103 [ 7.865005] .... node #13, CPUs: #104 #105 #106 #107 #108 #109 #110 #111 [ 8.466005] .... node #14, CPUs: #112 #113 #114 #115 #116 #117 #118 #119 [ 9.073006] .... node #15, CPUs: #120 #121 #122 #123 #124 #125 #126 #127 [ 9.679901] x86: Booted up 16 nodes, 128 CPUs and drop useless elements. Change num_digits() to hpa's division-avoiding, cell-phone-typed version which he went at great lengths and pains to submit on a Saturday evening. Signed-off-by: Borislav Petkov <bp@suse.de> Cc: huawei.libin@huawei.com Cc: wangyijing@huawei.com Cc: fenghua.yu@intel.com Cc: guohanjun@huawei.com Cc: paul.gortmaker@windriver.com Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20130930095624.GB16383@pd.tnic Signed-off-by: Ingo Molnar <mingo@kernel.org>

The asm-generic, big-endian version of zero_bytemask creates a mask of bytes preceding the first zero-byte by left shifting ~0ul based on the position of the first zero byte. Unfortunately, if the first (top) byte is zero, the output of prep_zero_mask has only the top bit set, resulting in undefined C behaviour as we shift left by an amount equal to the width of the type. As it happens, GCC doesn't manage to spot this through the call to fls(), but the issue remains if architectures choose to implement their shift instructions differently. An example would be arch/arm/ (AArch32), where LSL Rd, Rn, #32 results in Rd == 0x0, whilst on arch/arm64 (AArch64) LSL Xd, Xn, #64 results in Xd == Xn. Rather than check explicitly for the problematic shift, this patch adds an extra shift by 1, replacing fls with __fls. Since zero_bytemask is never called with a zero argument (has_zero() is used to check the data first), we don't need to worry about calling __fls(0), which is undefined. Cc: <stable@vger.kernel.org> Cc: Victor Kamensky <victor.kamensky@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

commit ec6931b upstream. The asm-generic, big-endian version of zero_bytemask creates a mask of bytes preceding the first zero-byte by left shifting ~0ul based on the position of the first zero byte. Unfortunately, if the first (top) byte is zero, the output of prep_zero_mask has only the top bit set, resulting in undefined C behaviour as we shift left by an amount equal to the width of the type. As it happens, GCC doesn't manage to spot this through the call to fls(), but the issue remains if architectures choose to implement their shift instructions differently. An example would be arch/arm/ (AArch32), where LSL Rd, Rn, linux-sunxi#32 results in Rd == 0x0, whilst on arch/arm64 (AArch64) LSL Xd, Xn, linux-sunxi#64 results in Xd == Xn. Rather than check explicitly for the problematic shift, this patch adds an extra shift by 1, replacing fls with __fls. Since zero_bytemask is never called with a zero argument (has_zero() is used to check the data first), we don't need to worry about calling __fls(0), which is undefined. Cc: Victor Kamensky <victor.kamensky@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Maxime reported the following memory leak regression due to commit dbc8358 ("mm/nommu: use alloc_pages_exact() rather than its own implementation"). On v3.19, I am facing a memory leak. Each time I run a command one page is lost. Here an example with busybox's free command: / # free total used free shared buffers cached Mem: 7928 1972 5956 0 0 492 -/+ buffers/cache: 1480 6448 / # free total used free shared buffers cached Mem: 7928 1976 5952 0 0 492 -/+ buffers/cache: 1484 6444 / # free total used free shared buffers cached Mem: 7928 1980 5948 0 0 492 -/+ buffers/cache: 1488 6440 / # free total used free shared buffers cached Mem: 7928 1984 5944 0 0 492 -/+ buffers/cache: 1492 6436 / # free total used free shared buffers cached Mem: 7928 1988 5940 0 0 492 -/+ buffers/cache: 1496 6432 At some point, the system fails to sastisfy 256KB allocations: free: page allocation failure: order:6, mode:0xd0 CPU: 0 PID: 67 Comm: free Not tainted 3.19.0-05389-gacf2cf1-dirty linux-sunxi#64 Hardware name: STM32 (Device Tree Support) show_stack+0xb/0xc warn_alloc_failed+0x97/0xbc __alloc_pages_nodemask+0x295/0x35c __get_free_pages+0xb/0x24 alloc_pages_exact+0x19/0x24 do_mmap_pgoff+0x423/0x658 vm_mmap_pgoff+0x3f/0x4e load_flat_file+0x20d/0x4f8 load_flat_binary+0x3f/0x26c search_binary_handler+0x51/0xe4 do_execveat_common+0x271/0x35c do_execve+0x19/0x1c ret_fast_syscall+0x1/0x4a Mem-info: Normal per-cpu: CPU 0: hi: 0, btch: 1 usd: 0 active_anon:0 inactive_anon:0 isolated_anon:0 active_file:0 inactive_file:0 isolated_file:0 unevictable:123 dirty:0 writeback:0 unstable:0 free:1515 slab_reclaimable:17 slab_unreclaimable:139 mapped:0 shmem:0 pagetables:0 bounce:0 free_cma:0 Normal free:6060kB min:352kB low:440kB high:528kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:492kB isolated(anon):0ks lowmem_reserve[]: 0 0 Normal: 23*4kB (U) 22*8kB (U) 24*16kB (U) 23*32kB (U) 23*64kB (U) 23*128kB (U) 1*256kB (U) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 6060kB 123 total pagecache pages 2048 pages of RAM 1538 free pages 66 reserved pages 109 slab pages -46 pages shared 0 pages swap cached nommu: Allocation of length 221184 from process 67 (free) failed Normal per-cpu: CPU 0: hi: 0, btch: 1 usd: 0 active_anon:0 inactive_anon:0 isolated_anon:0 active_file:0 inactive_file:0 isolated_file:0 unevictable:123 dirty:0 writeback:0 unstable:0 free:1515 slab_reclaimable:17 slab_unreclaimable:139 mapped:0 shmem:0 pagetables:0 bounce:0 free_cma:0 Normal free:6060kB min:352kB low:440kB high:528kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:492kB isolated(anon):0ks lowmem_reserve[]: 0 0 Normal: 23*4kB (U) 22*8kB (U) 24*16kB (U) 23*32kB (U) 23*64kB (U) 23*128kB (U) 1*256kB (U) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 6060kB 123 total pagecache pages Unable to allocate RAM for process text/data, errno 12 SEGV This problem happens because we allocate ordered page through __get_free_pages() in do_mmap_private() in some cases and we try to free individual pages rather than ordered page in free_page_series(). In this case, freeing pages whose refcount is not 0 won't be freed to the page allocator so memory leak happens. To fix the problem, this patch changes __get_free_pages() to alloc_pages_exact() since alloc_pages_exact() returns physically-contiguous pages but each pages are refcounted. Fixes: dbc8358 ("mm/nommu: use alloc_pages_exact() rather than its own implementation"). Reported-by: Maxime Coquelin <mcoquelin.stm32@gmail.com> Tested-by: Maxime Coquelin <mcoquelin.stm32@gmail.com> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: <stable@vger.kernel.org> [3.19] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

objdump's raw insn output can vary across architectures on the number of bytes per chunk (bpc) displayed and their endianness. The code-reading test relied on reading objdump output as 1 bpc. Kaixu Xia reported test failure on ARM64, where objdump displays 4 bpc: 70c48: f90027bf str xzr, [x29,#72] 70c4c: 91224000 add x0, x0, #0x890 70c50: f90023a0 str x0, [x29,#64] This patch adds support to read raw insn output for any bpc length. In case of 2+ bpc it also guesses objdump's display endian. Reported-and-Tested-by: Kaixu Xia <xiakaixu@huawei.com> Signed-off-by: Jan Stancek <jstancek@redhat.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/07f0f7bcbda78deb423298708ef9b6a54d6b92bd.1452592712.git.jstancek@redhat.com [ Fix up pr_fmt() call to use %zd for size_t variables, fixing the build on Ubuntu cross-compiling to armhf and ppc64 ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Whilst waiting on a request, we may do so without holding any locks or any guards beyond a reference to the request. In order to avoid taking locks within request deallocation, we drop references to its timeline (via the context and ppgtt) upon retirement. We should avoid chasing such pointers outside of their control, in particular we inspect the request->timeline to see if we may restore the RPS waitboost for a client. If we instead look at the engine->timeline, we will have similar behaviour on both full-ppgtt and !full-ppgtt systems and reduce the amount of reward we give towards stalling clients (i.e. only if the client stalls and the GPU is uncontended does it reclaim its boost). This restores behaviour back to pre-timelines, whilst fixing: [ 645.078485] BUG: KASAN: use-after-free in i915_gem_object_wait_fence+0x1ee/0x2e0 at addr ffff8802335643a0 [ 645.078577] Read of size 4 by task gem_exec_schedu/28408 [ 645.078638] CPU: 1 PID: 28408 Comm: gem_exec_schedu Not tainted 4.9.0-rc2+ #64 [ 645.078724] Hardware name: / , BIOS PYBSWCEL.86A.0027.2015.0507.1758 05/07/2015 [ 645.078816] ffff88022daef9a0 ffffffff8143d059 ffff880235402a80 ffff880233564200 [ 645.078998] ffff88022daef9c8 ffffffff81229c5c ffff88022daefa48 ffff880233564200 [ 645.079172] ffff880235402a80 ffff88022daefa38 ffffffff81229ef0 000000008110a796 [ 645.079345] Call Trace: [ 645.079404] [<ffffffff8143d059>] dump_stack+0x68/0x9f [ 645.079467] [<ffffffff81229c5c>] kasan_object_err+0x1c/0x70 [ 645.079534] [<ffffffff81229ef0>] kasan_report_error+0x1f0/0x4b0 [ 645.079601] [<ffffffff8122a244>] kasan_report+0x34/0x40 [ 645.079676] [<ffffffff81634f5e>] ? i915_gem_object_wait_fence+0x1ee/0x2e0 [ 645.079741] [<ffffffff81229951>] __asan_load4+0x61/0x80 [ 645.079807] [<ffffffff81634f5e>] i915_gem_object_wait_fence+0x1ee/0x2e0 [ 645.079876] [<ffffffff816364bf>] i915_gem_object_wait+0x19f/0x590 [ 645.079944] [<ffffffff81636320>] ? i915_gem_object_wait_priority+0x500/0x500 [ 645.080016] [<ffffffff8110fb30>] ? debug_show_all_locks+0x1e0/0x1e0 [ 645.080084] [<ffffffff8110abdc>] ? check_chain_key+0x14c/0x210 [ 645.080157] [<ffffffff8110a796>] ? __lock_is_held+0x46/0xc0 [ 645.080226] [<ffffffff8163bc61>] ? i915_gem_set_domain_ioctl+0x141/0x690 [ 645.080296] [<ffffffff8163bcc2>] i915_gem_set_domain_ioctl+0x1a2/0x690 [ 645.080366] [<ffffffff811f8f85>] ? __might_fault+0x75/0xe0 [ 645.080433] [<ffffffff815a55f7>] drm_ioctl+0x327/0x640 [ 645.080508] [<ffffffff8163bb20>] ? i915_gem_obj_prepare_shmem_write+0x3a0/0x3a0 [ 645.080603] [<ffffffff815a52d0>] ? drm_ioctl_permit+0x120/0x120 [ 645.080670] [<ffffffff8110abdc>] ? check_chain_key+0x14c/0x210 [ 645.080738] [<ffffffff81275717>] do_vfs_ioctl+0x127/0xa20 [ 645.080804] [<ffffffff8120268c>] ? do_mmap+0x47c/0x580 [ 645.080871] [<ffffffff811da567>] ? vm_mmap_pgoff+0x117/0x140 [ 645.080938] [<ffffffff812755f0>] ? ioctl_preallocate+0x150/0x150 [ 645.081011] [<ffffffff81108c53>] ? up_write+0x23/0x50 [ 645.081078] [<ffffffff811da567>] ? vm_mmap_pgoff+0x117/0x140 [ 645.081145] [<ffffffff811da450>] ? vma_is_stack_for_current+0x90/0x90 [ 645.081214] [<ffffffff8110d853>] ? mark_held_locks+0x23/0xc0 [ 645.082030] [<ffffffff81288408>] ? __fget+0x168/0x250 [ 645.082106] [<ffffffff819ad517>] ? entry_SYSCALL_64_fastpath+0x5/0xb1 [ 645.082176] [<ffffffff81288592>] ? __fget_light+0xa2/0xc0 [ 645.082242] [<ffffffff8127604c>] SyS_ioctl+0x3c/0x70 [ 645.082309] [<ffffffff819ad52e>] entry_SYSCALL_64_fastpath+0x1c/0xb1 [ 645.082374] Object at ffff880233564200, in cache kmalloc-8192 size: 8192 [ 645.082431] Allocated: [ 645.082480] PID = 28408 [ 645.082535] [ 645.082566] [<ffffffff8103ae66>] save_stack_trace+0x16/0x20 [ 645.082623] [ 645.082656] [<ffffffff81228b06>] save_stack+0x46/0xd0 [ 645.082716] [ 645.082756] [<ffffffff812292fd>] kasan_kmalloc+0xad/0xe0 [ 645.082817] [ 645.082848] [<ffffffff81631752>] i915_ppgtt_create+0x52/0x220 [ 645.082908] [ 645.082941] [<ffffffff8161db96>] i915_gem_create_context+0x396/0x560 [ 645.083027] [ 645.083059] [<ffffffff8161f857>] i915_gem_context_create_ioctl+0x97/0xf0 [ 645.083152] [ 645.083183] [<ffffffff815a55f7>] drm_ioctl+0x327/0x640 [ 645.083243] [ 645.083274] [<ffffffff81275717>] do_vfs_ioctl+0x127/0xa20 [ 645.083334] [ 645.083372] [<ffffffff8127604c>] SyS_ioctl+0x3c/0x70 [ 645.083432] [ 645.083464] [<ffffffff819ad52e>] entry_SYSCALL_64_fastpath+0x1c/0xb1 [ 645.083551] Freed: [ 645.083599] PID = 27629 [ 645.083648] [ 645.083676] [<ffffffff8103ae66>] save_stack_trace+0x16/0x20 [ 645.083738] [ 645.083770] [<ffffffff81228b06>] save_stack+0x46/0xd0 [ 645.083830] [ 645.083862] [<ffffffff81229203>] kasan_slab_free+0x73/0xc0 [ 645.083922] [ 645.083961] [<ffffffff812279c9>] kfree+0xa9/0x170 [ 645.084021] [ 645.084053] [<ffffffff81629f60>] i915_ppgtt_release+0x100/0x180 [ 645.084139] [ 645.084171] [<ffffffff8161d414>] i915_gem_context_free+0x1b4/0x230 [ 645.084257] [ 645.084288] [<ffffffff816537b2>] intel_lr_context_unpin+0x192/0x230 [ 645.084380] [ 645.084413] [<ffffffff81645250>] i915_gem_request_retire+0x620/0x630 [ 645.084500] [ 645.085226] [<ffffffff816473d1>] i915_gem_retire_requests+0x181/0x280 [ 645.085313] [ 645.085352] [<ffffffff816352ba>] i915_gem_retire_work_handler+0xca/0xe0 [ 645.085440] [ 645.085471] [<ffffffff810c725b>] process_one_work+0x4fb/0x920 [ 645.085532] [ 645.085562] [<ffffffff810c770d>] worker_thread+0x8d/0x840 [ 645.085622] [ 645.085653] [<ffffffff810d21e5>] kthread+0x185/0x1b0 [ 645.085718] [ 645.085750] [<ffffffff819ad7a7>] ret_from_fork+0x27/0x40 [ 645.085811] Memory state around the buggy address: [ 645.085869] ffff880233564280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 645.085956] ffff880233564300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 645.086053] >ffff880233564380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 645.086138] ^ [ 645.086193] ffff880233564400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 645.086283] ffff880233564480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb v2: Add a comment to document the hint like nature of intel_engine_last_submit() Fixes: 73cb970 ("drm/i915: Combine seqno + tracking into a global timeline struct") Fixes: 80b204b ("drm/i915: Enable multiple timelines") Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20161101100317.11129-1-chris@chris-wilson.co.uk

…fixes WARNING: please, no spaces at the start of a line linux-sunxi#26: FILE: fs/ocfs2/dlm/dlmrecovery.c:2271: + struct list_head *queue = NULL;$ WARNING: please, no spaces at the start of a line linux-sunxi#27: FILE: fs/ocfs2/dlm/dlmrecovery.c:2272: + int i;$ WARNING: please, no spaces at the start of a line linux-sunxi#60: FILE: fs/ocfs2/dlm/dlmrecovery.c:2285: + for (i = DLM_GRANTED_LIST; i <= DLM_BLOCKED_LIST; i++) {$ WARNING: suspect code indent for conditional statements (7, 15) linux-sunxi#60: FILE: fs/ocfs2/dlm/dlmrecovery.c:2285: + for (i = DLM_GRANTED_LIST; i <= DLM_BLOCKED_LIST; i++) { + queue = dlm_list_idx_to_ptr(res, i); ERROR: code indent should use tabs where possible linux-sunxi#61: FILE: fs/ocfs2/dlm/dlmrecovery.c:2286: + queue = dlm_list_idx_to_ptr(res, i);$ WARNING: please, no spaces at the start of a line linux-sunxi#61: FILE: fs/ocfs2/dlm/dlmrecovery.c:2286: + queue = dlm_list_idx_to_ptr(res, i);$ ERROR: code indent should use tabs where possible linux-sunxi#62: FILE: fs/ocfs2/dlm/dlmrecovery.c:2287: + list_for_each_entry_safe(lock, next, queue, list) {$ WARNING: please, no spaces at the start of a line linux-sunxi#62: FILE: fs/ocfs2/dlm/dlmrecovery.c:2287: + list_for_each_entry_safe(lock, next, queue, list) {$ WARNING: suspect code indent for conditional statements (15, 23) linux-sunxi#62: FILE: fs/ocfs2/dlm/dlmrecovery.c:2287: + list_for_each_entry_safe(lock, next, queue, list) { + if (lock->ml.node == dead_node) { ERROR: code indent should use tabs where possible linux-sunxi#63: FILE: fs/ocfs2/dlm/dlmrecovery.c:2288: + if (lock->ml.node == dead_node) {$ WARNING: please, no spaces at the start of a line linux-sunxi#63: FILE: fs/ocfs2/dlm/dlmrecovery.c:2288: + if (lock->ml.node == dead_node) {$ WARNING: suspect code indent for conditional statements (23, 31) linux-sunxi#63: FILE: fs/ocfs2/dlm/dlmrecovery.c:2288: + if (lock->ml.node == dead_node) { + list_del_init(&lock->list); ERROR: code indent should use tabs where possible linux-sunxi#64: FILE: fs/ocfs2/dlm/dlmrecovery.c:2289: + list_del_init(&lock->list);$ WARNING: please, no spaces at the start of a line linux-sunxi#64: FILE: fs/ocfs2/dlm/dlmrecovery.c:2289: + list_del_init(&lock->list);$ ERROR: code indent should use tabs where possible linux-sunxi#65: FILE: fs/ocfs2/dlm/dlmrecovery.c:2290: + dlm_lock_put(lock);$ WARNING: please, no spaces at the start of a line linux-sunxi#65: FILE: fs/ocfs2/dlm/dlmrecovery.c:2290: + dlm_lock_put(lock);$ ERROR: code indent should use tabs where possible linux-sunxi#66: FILE: fs/ocfs2/dlm/dlmrecovery.c:2291: + /* Can't schedule DLM_UNLOCK_FREE_LOCK$ ERROR: code indent should use tabs where possible linux-sunxi#67: FILE: fs/ocfs2/dlm/dlmrecovery.c:2292: + * do manually$ ERROR: code indent should use tabs where possible linux-sunxi#68: FILE: fs/ocfs2/dlm/dlmrecovery.c:2293: + */$ ERROR: code indent should use tabs where possible linux-sunxi#69: FILE: fs/ocfs2/dlm/dlmrecovery.c:2294: + dlm_lock_put(lock);$ WARNING: please, no spaces at the start of a line linux-sunxi#69: FILE: fs/ocfs2/dlm/dlmrecovery.c:2294: + dlm_lock_put(lock);$ ERROR: code indent should use tabs where possible linux-sunxi#70: FILE: fs/ocfs2/dlm/dlmrecovery.c:2295: + freed++;$ WARNING: please, no spaces at the start of a line linux-sunxi#70: FILE: fs/ocfs2/dlm/dlmrecovery.c:2295: + freed++;$ ERROR: code indent should use tabs where possible linux-sunxi#71: FILE: fs/ocfs2/dlm/dlmrecovery.c:2296: + }$ WARNING: please, no spaces at the start of a line linux-sunxi#71: FILE: fs/ocfs2/dlm/dlmrecovery.c:2296: + }$ total: 11 errors, 14 warnings, 51 lines checked NOTE: For some of the reported defects, checkpatch may be able to mechanically convert to the typical style using --fix or --fix-inplace. NOTE: Whitespace errors detected. You may wish to use scripts/cleanpatch or scripts/cleanfile ./patches/ocfs2-dlm-optimization-of-code-while-free-dead-node-locks.patch has style problems, please review. NOTE: If any of the errors are false positives, please report them to the maintainer, see CHECKPATCH in MAINTAINERS. Please run checkpatch prior to sending patches Cc: Guozhonghua <guozhonghua@h3c.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

…fixes WARNING: please, no spaces at the start of a line linux-sunxi#26: FILE: fs/ocfs2/dlm/dlmrecovery.c:2271: + struct list_head *queue = NULL;$ WARNING: please, no spaces at the start of a line linux-sunxi#27: FILE: fs/ocfs2/dlm/dlmrecovery.c:2272: + int i;$ WARNING: please, no spaces at the start of a line linux-sunxi#60: FILE: fs/ocfs2/dlm/dlmrecovery.c:2285: + for (i = DLM_GRANTED_LIST; i <= DLM_BLOCKED_LIST; i++) {$ WARNING: suspect code indent for conditional statements (7, 15) linux-sunxi#60: FILE: fs/ocfs2/dlm/dlmrecovery.c:2285: + for (i = DLM_GRANTED_LIST; i <= DLM_BLOCKED_LIST; i++) { + queue = dlm_list_idx_to_ptr(res, i); ERROR: code indent should use tabs where possible linux-sunxi#61: FILE: fs/ocfs2/dlm/dlmrecovery.c:2286: + queue = dlm_list_idx_to_ptr(res, i);$ WARNING: please, no spaces at the start of a line linux-sunxi#61: FILE: fs/ocfs2/dlm/dlmrecovery.c:2286: + queue = dlm_list_idx_to_ptr(res, i);$ ERROR: code indent should use tabs where possible linux-sunxi#62: FILE: fs/ocfs2/dlm/dlmrecovery.c:2287: + list_for_each_entry_safe(lock, next, queue, list) {$ WARNING: please, no spaces at the start of a line linux-sunxi#62: FILE: fs/ocfs2/dlm/dlmrecovery.c:2287: + list_for_each_entry_safe(lock, next, queue, list) {$ WARNING: suspect code indent for conditional statements (15, 23) linux-sunxi#62: FILE: fs/ocfs2/dlm/dlmrecovery.c:2287: + list_for_each_entry_safe(lock, next, queue, list) { + if (lock->ml.node == dead_node) { ERROR: code indent should use tabs where possible linux-sunxi#63: FILE: fs/ocfs2/dlm/dlmrecovery.c:2288: + if (lock->ml.node == dead_node) {$ WARNING: please, no spaces at the start of a line linux-sunxi#63: FILE: fs/ocfs2/dlm/dlmrecovery.c:2288: + if (lock->ml.node == dead_node) {$ WARNING: suspect code indent for conditional statements (23, 31) linux-sunxi#63: FILE: fs/ocfs2/dlm/dlmrecovery.c:2288: + if (lock->ml.node == dead_node) { + list_del_init(&lock->list); ERROR: code indent should use tabs where possible linux-sunxi#64: FILE: fs/ocfs2/dlm/dlmrecovery.c:2289: + list_del_init(&lock->list);$ WARNING: please, no spaces at the start of a line linux-sunxi#64: FILE: fs/ocfs2/dlm/dlmrecovery.c:2289: + list_del_init(&lock->list);$ ERROR: code indent should use tabs where possible linux-sunxi#65: FILE: fs/ocfs2/dlm/dlmrecovery.c:2290: + dlm_lock_put(lock);$ WARNING: please, no spaces at the start of a line linux-sunxi#65: FILE: fs/ocfs2/dlm/dlmrecovery.c:2290: + dlm_lock_put(lock);$ ERROR: code indent should use tabs where possible linux-sunxi#66: FILE: fs/ocfs2/dlm/dlmrecovery.c:2291: + /* Can't schedule DLM_UNLOCK_FREE_LOCK$ ERROR: code indent should use tabs where possible linux-sunxi#67: FILE: fs/ocfs2/dlm/dlmrecovery.c:2292: + * do manually$ ERROR: code indent should use tabs where possible linux-sunxi#68: FILE: fs/ocfs2/dlm/dlmrecovery.c:2293: + */$ ERROR: code indent should use tabs where possible linux-sunxi#69: FILE: fs/ocfs2/dlm/dlmrecovery.c:2294: + dlm_lock_put(lock);$ WARNING: please, no spaces at the start of a line linux-sunxi#69: FILE: fs/ocfs2/dlm/dlmrecovery.c:2294: + dlm_lock_put(lock);$ ERROR: code indent should use tabs where possible linux-sunxi#70: FILE: fs/ocfs2/dlm/dlmrecovery.c:2295: + freed++;$ WARNING: please, no spaces at the start of a line linux-sunxi#70: FILE: fs/ocfs2/dlm/dlmrecovery.c:2295: + freed++;$ ERROR: code indent should use tabs where possible linux-sunxi#71: FILE: fs/ocfs2/dlm/dlmrecovery.c:2296: + }$ WARNING: please, no spaces at the start of a line linux-sunxi#71: FILE: fs/ocfs2/dlm/dlmrecovery.c:2296: + }$ total: 11 errors, 14 warnings, 51 lines checked NOTE: For some of the reported defects, checkpatch may be able to mechanically convert to the typical style using --fix or --fix-inplace. NOTE: Whitespace errors detected. You may wish to use scripts/cleanpatch or scripts/cleanfile ./patches/ocfs2-dlm-optimization-of-code-while-free-dead-node-locks.patch has style problems, please review. NOTE: If any of the errors are false positives, please report them to the maintainer, see CHECKPATCH in MAINTAINERS. Please run checkpatch prior to sending patches Cc: Guozhonghua <guozhonghua@h3c.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

load_bpf_file() should fail if ioctl with command PERF_EVENT_IOC_ENABLE and PERF_EVENT_IOC_SET_BPF fails. When they do fail, proper error messages are printed. With this change, the below "syscall_tp" run shows that the maximum number of bpf progs attaching to the same perf tracepoint is indeed enforced. $ ./syscall_tp -i 64 prog #0: map ids 4 5 ... prog #63: map ids 382 383 $ ./syscall_tp -i 65 prog #0: map ids 4 5 ... prog #64: map ids 388 389 ioctl PERF_EVENT_IOC_SET_BPF failed err Argument list too long Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

This fixes the below calltrace when the CONFIG_DMA_API_DEBUG is enabled. DMA-API: thunderx_mmc 0000:01:01.4: cpu touching an active dma mapped cacheline [cln=0x000000002fdf9800] WARNING: CPU: 21 PID: 1 at kernel/dma/debug.c:596 debug_dma_assert_idle+0x1f8/0x270 Modules linked in: CPU: 21 PID: 1 Comm: init Not tainted 5.3.0-rc1-next-20190725-yocto-standard+ linux-sunxi#64 Hardware name: Marvell OcteonTX CN96XX board (DT) pstate: 80400009 (Nzcv daif +PAN -UAO) pc : debug_dma_assert_idle+0x1f8/0x270 lr : debug_dma_assert_idle+0x1f8/0x270 sp : ffff0000113cfc10 x29: ffff0000113cfc10 x28: 0000ffff8c880000 x27: ffff800bc72a0000 x26: ffff000010ff8000 x25: ffff000010ff8940 x24: ffff000010ff8968 x23: 0000000000000000 x22: ffff000010e83700 x21: ffff000010ea2000 x20: ffff000010e835c8 x19: ffff800bc2c73300 x18: ffffffffffffffff x17: 0000000000000000 x16: 0000000000000000 x15: ffff000010e835c8 x14: 6d20616d64206576 x13: 69746361206e6120 x12: 676e696863756f74 x11: 20757063203a342e x10: 31303a31303a3030 x9 : 303020636d6d5f78 x8 : 3230303030303030 x7 : 00000000000002fd x6 : ffff000010fd57d0 x5 : 0000000000000000 x4 : ffff0000106c5210 x3 : 00000000ffffffff x2 : 0000800bee9c0000 x1 : 57d5843f4aa62800 x0 : 0000000000000000 Call trace: debug_dma_assert_idle+0x1f8/0x270 wp_page_copy+0xb0/0x688 do_wp_page+0xa8/0x5b8 __handle_mm_fault+0x600/0xd00 handle_mm_fault+0x118/0x1e8 do_page_fault+0x200/0x500 do_mem_abort+0x50/0xb0 el0_da+0x20/0x24 ---[ end trace a005534bd23e109f ]--- DMA-API: Mapped at: debug_dma_map_sg+0x94/0x350 cvm_mmc_request+0x3c4/0x988 __mmc_start_request+0x9c/0x1f8 mmc_start_request+0x7c/0xb0 mmc_blk_mq_issue_rq+0x5c4/0x7b8 Signed-off-by: Kevin Hao <haokexin@gmail.com> Fixes: ba3869f ("mmc: cavium: Add core MMC driver for Cavium SOCs") Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

commit b803974 upstream. This fixes the below calltrace when the CONFIG_DMA_API_DEBUG is enabled. DMA-API: thunderx_mmc 0000:01:01.4: cpu touching an active dma mapped cacheline [cln=0x000000002fdf9800] WARNING: CPU: 21 PID: 1 at kernel/dma/debug.c:596 debug_dma_assert_idle+0x1f8/0x270 Modules linked in: CPU: 21 PID: 1 Comm: init Not tainted 5.3.0-rc1-next-20190725-yocto-standard+ linux-sunxi#64 Hardware name: Marvell OcteonTX CN96XX board (DT) pstate: 80400009 (Nzcv daif +PAN -UAO) pc : debug_dma_assert_idle+0x1f8/0x270 lr : debug_dma_assert_idle+0x1f8/0x270 sp : ffff0000113cfc10 x29: ffff0000113cfc10 x28: 0000ffff8c880000 x27: ffff800bc72a0000 x26: ffff000010ff8000 x25: ffff000010ff8940 x24: ffff000010ff8968 x23: 0000000000000000 x22: ffff000010e83700 x21: ffff000010ea2000 x20: ffff000010e835c8 x19: ffff800bc2c73300 x18: ffffffffffffffff x17: 0000000000000000 x16: 0000000000000000 x15: ffff000010e835c8 x14: 6d20616d64206576 x13: 69746361206e6120 x12: 676e696863756f74 x11: 20757063203a342e x10: 31303a31303a3030 x9 : 303020636d6d5f78 x8 : 3230303030303030 x7 : 00000000000002fd x6 : ffff000010fd57d0 x5 : 0000000000000000 x4 : ffff0000106c5210 x3 : 00000000ffffffff x2 : 0000800bee9c0000 x1 : 57d5843f4aa62800 x0 : 0000000000000000 Call trace: debug_dma_assert_idle+0x1f8/0x270 wp_page_copy+0xb0/0x688 do_wp_page+0xa8/0x5b8 __handle_mm_fault+0x600/0xd00 handle_mm_fault+0x118/0x1e8 do_page_fault+0x200/0x500 do_mem_abort+0x50/0xb0 el0_da+0x20/0x24 ---[ end trace a005534bd23e109f ]--- DMA-API: Mapped at: debug_dma_map_sg+0x94/0x350 cvm_mmc_request+0x3c4/0x988 __mmc_start_request+0x9c/0x1f8 mmc_start_request+0x7c/0xb0 mmc_blk_mq_issue_rq+0x5c4/0x7b8 Signed-off-by: Kevin Hao <haokexin@gmail.com> Fixes: ba3869f ("mmc: cavium: Add core MMC driver for Cavium SOCs") Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit c7b6804 ] Building a combined ARMv4+XScale kernel produces these and other build failures: /tmp/copypage-xscale-3aa821.s: Assembler messages: /tmp/copypage-xscale-3aa821.s:167: Error: selected processor does not support `pld [r7,#0]' in ARM mode /tmp/copypage-xscale-3aa821.s:168: Error: selected processor does not support `pld [r7,linux-sunxi#32]' in ARM mode /tmp/copypage-xscale-3aa821.s:169: Error: selected processor does not support `pld [r1,#0]' in ARM mode /tmp/copypage-xscale-3aa821.s:170: Error: selected processor does not support `pld [r1,linux-sunxi#32]' in ARM mode /tmp/copypage-xscale-3aa821.s:171: Error: selected processor does not support `pld [r7,linux-sunxi#64]' in ARM mode /tmp/copypage-xscale-3aa821.s:176: Error: selected processor does not support `ldrd r4,r5,[r7],linux-sunxi#8' in ARM mode /tmp/copypage-xscale-3aa821.s:180: Error: selected processor does not support `strd r4,r5,[r1],linux-sunxi#8' in ARM mode Add an explict .arch armv5 in the inline assembly to allow the ARMv5 specific instructions regardless of the compiler -march= target. Link: https://lore.kernel.org/r/20190809163334.489360-5-arnd@arndb.de Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Sasha Levin <sashal@kernel.org>

Map the leaf SPTE when handling a TDP MMU page fault if and only if the target level is reached. A recent commit reworked the retry logic and incorrectly assumed that walking SPTEs would never "fail", as the loop either bails (retries) or installs parent SPs. However, the iterator itself will bail early if it detects a frozen (REMOVED) SPTE when stepping down. The TDP iterator also rereads the current SPTE before stepping down specifically to avoid walking into a part of the tree that is being removed, which means it's possible to terminate the loop without the guts of the loop observing the frozen SPTE, e.g. if a different task zaps a parent SPTE between the initial read and try_step_down()'s refresh. Mapping a leaf SPTE at the wrong level results in all kinds of badness as page table walkers interpret the SPTE as a page table, not a leaf, and walk into the weeds. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 1025 at arch/x86/kvm/mmu/tdp_mmu.c:1070 kvm_tdp_mmu_map+0x481/0x510 Modules linked in: kvm_intel CPU: 1 PID: 1025 Comm: nx_huge_pages_t Tainted: G W 6.1.0-rc4+ linux-sunxi#64 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:kvm_tdp_mmu_map+0x481/0x510 RSP: 0018:ffffc9000072fba8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffc9000072fcc0 RCX: 0000000000000027 RDX: 0000000000000027 RSI: 00000000ffffdfff RDI: ffff888277c5b4c8 RBP: ffff888107d45a10 R08: ffff888277c5b4c0 R09: ffffc9000072fa48 R10: 0000000000000001 R11: 0000000000000001 R12: ffffc9000073a0e0 R13: ffff88810fc54800 R14: ffff888107d1ae60 R15: ffff88810fc54f90 FS: 00007fba9f853740(0000) GS:ffff888277c40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000010aa7a003 CR4: 0000000000172ea0 Call Trace: <TASK> kvm_tdp_page_fault+0x10c/0x130 kvm_mmu_page_fault+0x103/0x680 vmx_handle_exit+0x132/0x5a0 [kvm_intel] vcpu_enter_guest+0x60c/0x16f0 kvm_arch_vcpu_ioctl_run+0x1e2/0x9d0 kvm_vcpu_ioctl+0x271/0x660 __x64_sys_ioctl+0x80/0xb0 do_syscall_64+0x2b/0x50 entry_SYSCALL_64_after_hwframe+0x46/0xb0 </TASK> ---[ end trace 0000000000000000 ]--- Invalid SPTE change: cannot replace a present leaf SPTE with another present leaf SPTE mapping a different PFN! as_id: 0 gfn: 100200 old_spte: 600000112400bf3 new_spte: 6000001126009f3 level: 2 ------------[ cut here ]------------ kernel BUG at arch/x86/kvm/mmu/tdp_mmu.c:559! invalid opcode: 0000 [#1] SMP CPU: 1 PID: 1025 Comm: nx_huge_pages_t Tainted: G W 6.1.0-rc4+ linux-sunxi#64 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:__handle_changed_spte.cold+0x95/0x9c RSP: 0018:ffffc9000072faf8 EFLAGS: 00010246 RAX: 00000000000000c1 RBX: ffffc90000731000 RCX: 0000000000000027 RDX: 0000000000000000 RSI: 00000000ffffdfff RDI: ffff888277c5b4c8 RBP: 0600000112400bf3 R08: ffff888277c5b4c0 R09: ffffc9000072f9a0 R10: 0000000000000001 R11: 0000000000000001 R12: 06000001126009f3 R13: 0000000000000002 R14: 0000000012600901 R15: 0000000012400b01 FS: 00007fba9f853740(0000) GS:ffff888277c40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000010aa7a003 CR4: 0000000000172ea0 Call Trace: <TASK> kvm_tdp_mmu_map+0x3b0/0x510 kvm_tdp_page_fault+0x10c/0x130 kvm_mmu_page_fault+0x103/0x680 vmx_handle_exit+0x132/0x5a0 [kvm_intel] vcpu_enter_guest+0x60c/0x16f0 kvm_arch_vcpu_ioctl_run+0x1e2/0x9d0 kvm_vcpu_ioctl+0x271/0x660 __x64_sys_ioctl+0x80/0xb0 do_syscall_64+0x2b/0x50 entry_SYSCALL_64_after_hwframe+0x46/0xb0 </TASK> Modules linked in: kvm_intel ---[ end trace 0000000000000000 ]--- Fixes: 63d28a2 ("KVM: x86/mmu: simplify kvm_tdp_mmu_map flow when guest has to retry") Cc: Robert Hoo <robert.hu@linux.intel.com> Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20221213033030.83345-3-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Don't install a leaf TDP MMU SPTE if the parent page's level doesn't match the target level of the fault, and instead have the vCPU retry the faulting instruction after warning. Continuing on is completely unnecessary as the absolute worst case scenario of retrying is DoSing the vCPU, whereas continuing on all but guarantees bigger explosions, e.g. ------------[ cut here ]------------ kernel BUG at arch/x86/kvm/mmu/tdp_mmu.c:559! invalid opcode: 0000 [#1] SMP CPU: 1 PID: 1025 Comm: nx_huge_pages_t Tainted: G W 6.1.0-rc4+ linux-sunxi#64 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:__handle_changed_spte.cold+0x95/0x9c RSP: 0018:ffffc9000072faf8 EFLAGS: 00010246 RAX: 00000000000000c1 RBX: ffffc90000731000 RCX: 0000000000000027 RDX: 0000000000000000 RSI: 00000000ffffdfff RDI: ffff888277c5b4c8 RBP: 0600000112400bf3 R08: ffff888277c5b4c0 R09: ffffc9000072f9a0 R10: 0000000000000001 R11: 0000000000000001 R12: 06000001126009f3 R13: 0000000000000002 R14: 0000000012600901 R15: 0000000012400b01 FS: 00007fba9f853740(0000) GS:ffff888277c40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000010aa7a003 CR4: 0000000000172ea0 Call Trace: <TASK> kvm_tdp_mmu_map+0x3b0/0x510 kvm_tdp_page_fault+0x10c/0x130 kvm_mmu_page_fault+0x103/0x680 vmx_handle_exit+0x132/0x5a0 [kvm_intel] vcpu_enter_guest+0x60c/0x16f0 kvm_arch_vcpu_ioctl_run+0x1e2/0x9d0 kvm_vcpu_ioctl+0x271/0x660 __x64_sys_ioctl+0x80/0xb0 do_syscall_64+0x2b/0x50 entry_SYSCALL_64_after_hwframe+0x46/0xb0 </TASK> Modules linked in: kvm_intel ---[ end trace 0000000000000000 ]--- Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20221213033030.83345-5-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

'__net_initdata' becomes a no-op with CONFIG_NET_NS=y, but when this option is disabled it becomes '__initdata', which means the data can be freed after the initialization phase. This annotation is obviously incorrect for the devlink net device notifier block which is still registered after the initialization phase [1]. Fix this crash by removing the '__net_initdata' annotation. [1] general protection fault, probably for non-canonical address 0xcccccccccccccccc: 0000 [#1] PREEMPT SMP CPU: 3 PID: 117 Comm: (udev-worker) Not tainted 6.4.0-rc1-custom-gdf0acdc59b09 linux-sunxi#64 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-1.fc37 04/01/2014 RIP: 0010:notifier_call_chain+0x58/0xc0 [...] Call Trace: <TASK> dev_set_mac_address+0x85/0x120 dev_set_mac_address_user+0x30/0x50 do_setlink+0x219/0x1270 rtnl_setlink+0xf7/0x1a0 rtnetlink_rcv_msg+0x142/0x390 netlink_rcv_skb+0x58/0x100 netlink_unicast+0x188/0x270 netlink_sendmsg+0x214/0x470 __sys_sendto+0x12f/0x1a0 __x64_sys_sendto+0x24/0x30 do_syscall_64+0x38/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Fixes: e93c937 ("devlink: change per-devlink netdev notifier to static one") Reported-by: Marek Szyprowski <m.szyprowski@samsung.com> Closes: https://lore.kernel.org/netdev/600ddf9e-589a-2aa0-7b69-a438f833ca10@samsung.com/ Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: Jiri Pirko <jiri@nvidia.com> Reviewed-by: Simon Horman <simon.horman@corigine.com> Link: https://lore.kernel.org/r/20230515162925.1144416-1-idosch@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>

BUG: KASAN: slab-use-after-free in xfrm_policy_inexact_list_reinsert+0xb6/0x430 Read of size 1 at addr ffff8881051f3bf8 by task ip/668 CPU: 2 PID: 668 Comm: ip Not tainted 6.5.0-rc5-00182-g25aa0bebba72-dirty linux-sunxi#64 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x72/0xa0 print_report+0xd0/0x620 kasan_report+0xb6/0xf0 xfrm_policy_inexact_list_reinsert+0xb6/0x430 xfrm_policy_inexact_insert_node.constprop.0+0x537/0x800 xfrm_policy_inexact_alloc_chain+0x23f/0x320 xfrm_policy_inexact_insert+0x6b/0x590 xfrm_policy_insert+0x3b1/0x480 xfrm_add_policy+0x23c/0x3c0 xfrm_user_rcv_msg+0x2d0/0x510 netlink_rcv_skb+0x10d/0x2d0 xfrm_netlink_rcv+0x49/0x60 netlink_unicast+0x3fe/0x540 netlink_sendmsg+0x528/0x970 sock_sendmsg+0x14a/0x160 ____sys_sendmsg+0x4fc/0x580 ___sys_sendmsg+0xef/0x160 __sys_sendmsg+0xf7/0x1b0 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x73/0xdd The root cause is: cpu 0 cpu1 xfrm_dump_policy xfrm_policy_walk list_move_tail xfrm_add_policy ... ... xfrm_policy_inexact_list_reinsert list_for_each_entry_reverse if (!policy->bydst_reinsert) //read non-existent policy xfrm_dump_policy_done xfrm_policy_walk_done list_del(&walk->walk.all); If dump_one_policy() returns err (triggered by netlink socket), xfrm_policy_walk() will move walk initialized by socket to list net->xfrm.policy_all. so this socket becomes visible in the global policy list. The head *walk can be traversed when users add policies with different prefixlen and trigger xfrm_policy node merge. The issue can also be triggered by policy list traversal while rehashing and flushing policies. It can be fixed by skip such "policies" with walk.dead set to 1. Fixes: 9cf545e ("xfrm: policy: store inexact policies in a tree ordered by destination address") Fixes: 12a169e ("ipsec: Put dumpers on the dump list") Signed-off-by: Dong Chenchen <dongchenchen2@huawei.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

[ Upstream commit d6352da ] '__net_initdata' becomes a no-op with CONFIG_NET_NS=y, but when this option is disabled it becomes '__initdata', which means the data can be freed after the initialization phase. This annotation is obviously incorrect for the devlink net device notifier block which is still registered after the initialization phase [1]. Fix this crash by removing the '__net_initdata' annotation. [1] general protection fault, probably for non-canonical address 0xcccccccccccccccc: 0000 [jwrdegoede#1] PREEMPT SMP CPU: 3 PID: 117 Comm: (udev-worker) Not tainted 6.4.0-rc1-custom-gdf0acdc59b09 linux-sunxi#64 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-1.fc37 04/01/2014 RIP: 0010:notifier_call_chain+0x58/0xc0 [...] Call Trace: <TASK> dev_set_mac_address+0x85/0x120 dev_set_mac_address_user+0x30/0x50 do_setlink+0x219/0x1270 rtnl_setlink+0xf7/0x1a0 rtnetlink_rcv_msg+0x142/0x390 netlink_rcv_skb+0x58/0x100 netlink_unicast+0x188/0x270 netlink_sendmsg+0x214/0x470 __sys_sendto+0x12f/0x1a0 __x64_sys_sendto+0x24/0x30 do_syscall_64+0x38/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Fixes: e93c937 ("devlink: change per-devlink netdev notifier to static one") Reported-by: Marek Szyprowski <m.szyprowski@samsung.com> Closes: https://lore.kernel.org/netdev/600ddf9e-589a-2aa0-7b69-a438f833ca10@samsung.com/ Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: Jiri Pirko <jiri@nvidia.com> Reviewed-by: Simon Horman <simon.horman@corigine.com> Link: https://lore.kernel.org/r/20230515162925.1144416-1-idosch@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>

pqlaz closed this as completed Aug 15, 2012

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Mele A2000 kernel panic after commit 9b1b6112465d3fa575966970f315de2c4a023ee1 #64

Mele A2000 kernel panic after commit 9b1b6112465d3fa575966970f315de2c4a023ee1 #64

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Mele A2000 kernel panic after commit 9b1b6112465d3fa575966970f315de2c4a023ee1 #64

Mele A2000 kernel panic after commit 9b1b6112465d3fa575966970f315de2c4a023ee1 #64

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pqlaz commented Aug 8, 2012

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