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Date: Wed, 30 May 2018 15:52:14 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: ufo19890607 <ufo19890607@...il.com>
Cc: akpm@...ux-foundation.org, mhocko@...e.com, rientjes@...gle.com,
kirill.shutemov@...ux.intel.com, aarcange@...hat.com,
penguin-kernel@...ove.SAKURA.ne.jp, guro@...com,
yang.s@...baba-inc.com, linux-mm@...ck.org,
linux-kernel@...r.kernel.org,
yuzhoujian <yuzhoujian@...ichuxing.com>, lkp@...org
Subject: [lkp-robot] [Print the memcg's name when system] c385a55f52:
BUG:KASAN:null-ptr-deref_in_m
FYI, we noticed the following commit (built with gcc-6):
commit: c385a55f521e1649051d7f653bec9aa0ce711c9e ("Print the memcg's name when system-wide OOM happened")
url: https://github.com/0day-ci/linux/commits/ufo19890607/Print-the-memcg-s-name-when-system-wide-OOM-happened/20180522-033834
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -smp 2 -m 512M
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+------------------------------------------------------------------+------------+------------+
| | 6741c4bb38 | c385a55f52 |
+------------------------------------------------------------------+------------+------------+
| boot_successes | 0 | 0 |
| boot_failures | 12 | 30 |
| invoked_oom-killer:gfp_mask=0x | 12 | 29 |
| Mem-Info | 12 | |
| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 12 | |
| BUG:KASAN:null-ptr-deref_in_m | 0 | 29 |
| BUG:unable_to_handle_kernel | 0 | 29 |
| Oops:#[##] | 0 | 29 |
| RIP:mem_cgroup_print_oom_memcg_name | 0 | 29 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 29 |
| BUG:kernel_hang_in_boot_stage | 0 | 1 |
+------------------------------------------------------------------+------------+------------+
[ 5.366081] BUG: KASAN: null-ptr-deref in mem_cgroup_print_oom_memcg_name+0xdb/0x130
[ 5.366817] Read of size 8 at addr 0000000000000000 by task swapper/0/1
[ 5.366817]
[ 5.366817] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.17.0-rc6-00081-gc385a55 #2
[ 5.370063] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 5.370063] Call Trace:
[ 5.370063] dump_stack+0x137/0x1d5
[ 5.376789] ? mem_cgroup_print_oom_memcg_name+0xdb/0x130
[ 5.376789] kasan_report+0x330/0x3c0
[ 5.376789] __asan_load8+0x7d/0x80
[ 5.376789] mem_cgroup_print_oom_memcg_name+0xdb/0x130
[ 5.380065] dump_header+0x161/0x756
[ 5.380065] ? __asan_loadN+0xf/0x20
[ 5.380065] out_of_memory+0x69e/0x860
[ 5.380065] ? unregister_oom_notifier+0x20/0x20
[ 5.380065] __alloc_pages_slowpath+0x1399/0x1d20
[ 5.383398] ? fs_reclaim_release+0x60/0x60
[ 5.383398] ? __asan_loadN+0xf/0x20
[ 5.383398] ? ftrace_likely_update+0x8c/0xb0
[ 5.383398] ? __asan_loadN+0xf/0x20
[ 5.386811] __alloc_pages_nodemask+0x507/0x820
[ 5.386811] ? __alloc_pages_slowpath+0x1d20/0x1d20
[ 5.386811] ? __asan_loadN+0xf/0x20
[ 5.396789] cache_grow_begin+0x137/0x1260
[ 5.396789] ? fs_reclaim_release+0x3b/0x60
[ 5.403389] ? __asan_loadN+0xf/0x20
[ 5.403389] cache_alloc_refill+0x3c6/0x7d0
[ 5.403389] kmem_cache_alloc+0x1ba/0x540
[ 5.403389] getname_flags+0x7b/0x5c0
[ 5.406793] ? __asan_loadN+0xf/0x20
[ 5.410056] ? _parse_integer+0x1b3/0x1d0
[ 5.410056] user_path_at_empty+0x23/0x40
[ 5.410056] vfs_statx+0x191/0x250
[ 5.410056] ? __do_compat_sys_newfstat+0x100/0x100
[ 5.410056] clean_path+0x94/0x177
[ 5.416793] ? do_reset+0x85/0x85
[ 5.416793] ? __asan_loadN+0xf/0x20
[ 5.416793] ? trace_hardirqs_on+0x37/0x2c0
[ 5.416793] ? __asan_loadN+0xf/0x20
[ 5.416793] ? strcmp+0x5c/0xc0
[ 5.420054] do_name+0xc3/0x509
[ 5.420054] ? write_buffer+0x31/0x4c
[ 5.420054] write_buffer+0x39/0x4c
[ 5.423389] flush_buffer+0x110/0x140
[ 5.423389] __gunzip+0x667/0x842
[ 5.426788] ? bunzip2+0xa5b/0xa5b
[ 5.430063] ? error+0x51/0x51
[ 5.430063] ? __gunzip+0x842/0x842
[ 5.430063] gunzip+0x11/0x13
[ 5.430063] ? do_start+0x23/0x23
[ 5.430063] unpack_to_rootfs+0x355/0x645
[ 5.436806] ? do_start+0x23/0x23
[ 5.436806] ? kmsg_dump_rewind+0xd0/0xf3
[ 5.436806] ? do_collect+0xc9/0xc9
[ 5.436806] populate_rootfs+0xf4/0x308
[ 5.436806] ? unpack_to_rootfs+0x645/0x645
[ 5.443389] do_one_initcall+0x289/0x755
[ 5.443389] ? trace_event_raw_event_initcall_finish+0x270/0x270
[ 5.443389] ? kasan_check_write+0x20/0x20
[ 5.446790] ? ftrace_likely_update+0x8c/0xb0
[ 5.446790] ? do_early_param+0x11b/0x11b
[ 5.446790] ? cpumask_check+0x77/0x90
[ 5.446790] ? __asan_loadN+0xf/0x20
[ 5.453387] ? do_early_param+0x11b/0x11b
[ 5.453387] kernel_init_freeable+0x1c1/0x2e6
[ 5.453387] ? rest_init+0x110/0x110
[ 5.453387] kernel_init+0x11/0x200
[ 5.453387] ? rest_init+0x110/0x110
[ 5.453387] ret_from_fork+0x24/0x30
[ 5.460056] ==================================================================
[ 5.460056] Disabling lock debugging due to kernel taint
[ 5.464179] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
[ 5.465373] PGD 0 P4D 0
[ 5.467430] Oops: 0000 [#1] SMP KASAN
[ 5.467430] Modules linked in:
[ 5.470057] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G B 4.17.0-rc6-00081-gc385a55 #2
[ 5.470057] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 5.476808] RIP: 0010:mem_cgroup_print_oom_memcg_name+0xdb/0x130
[ 5.476808] RSP: 0000:ffff88000320f458 EFLAGS: 00010292
[ 5.476808] RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffffb4449027
[ 5.483385] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000297
[ 5.483385] RBP: ffff88000320f470 R08: fffffbfff6f2126f R09: fffffbfff6f2126e
[ 5.490049] R10: ffffffffb7909377 R11: fffffbfff6f2126f R12: 0000000000000000
[ 5.490049] R13: 0000000000000000 R14: 0000000000000000 R15: ffff88000320f6b0
[ 5.490049] FS: 0000000000000000(0000) GS:ffff880003700000(0000) knlGS:0000000000000000
[ 5.496794] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 5.496794] CR2: 0000000000000000 CR3: 0000000013422000 CR4: 00000000000006e0
[ 5.496794] Call Trace:
[ 5.496794] dump_header+0x161/0x756
[ 5.500058] ? __asan_loadN+0xf/0x20
[ 5.500058] out_of_memory+0x69e/0x860
[ 5.500058] ? unregister_oom_notifier+0x20/0x20
[ 5.500058] __alloc_pages_slowpath+0x1399/0x1d20
[ 5.503391] ? fs_reclaim_release+0x60/0x60
[ 5.503391] ? __asan_loadN+0xf/0x20
[ 5.503391] ? ftrace_likely_update+0x8c/0xb0
[ 5.503391] ? __asan_loadN+0xf/0x20
[ 5.506791] __alloc_pages_nodemask+0x507/0x820
[ 5.506791] ? __alloc_pages_slowpath+0x1d20/0x1d20
[ 5.506791] ? __asan_loadN+0xf/0x20
[ 5.506791] cache_grow_begin+0x137/0x1260
[ 5.510059] ? fs_reclaim_release+0x3b/0x60
[ 5.510059] ? __asan_loadN+0xf/0x20
[ 5.510059] cache_alloc_refill+0x3c6/0x7d0
[ 5.510059] kmem_cache_alloc+0x1ba/0x540
[ 5.513390] getname_flags+0x7b/0x5c0
[ 5.513390] ? __asan_loadN+0xf/0x20
[ 5.513390] ? _parse_integer+0x1b3/0x1d0
[ 5.513390] user_path_at_empty+0x23/0x40
[ 5.513390] vfs_statx+0x191/0x250
[ 5.513390] ? __do_compat_sys_newfstat+0x100/0x100
[ 5.516775] clean_path+0x94/0x177
[ 5.516775] ? do_reset+0x85/0x85
[ 5.516775] ? __asan_loadN+0xf/0x20
[ 5.516775] ? trace_hardirqs_on+0x37/0x2c0
[ 5.516775] ? __asan_loadN+0xf/0x20
[ 5.520065] ? strcmp+0x5c/0xc0
[ 5.520065] do_name+0xc3/0x509
[ 5.520065] ? write_buffer+0x31/0x4c
[ 5.520065] write_buffer+0x39/0x4c
[ 5.520065] flush_buffer+0x110/0x140
[ 5.520065] __gunzip+0x667/0x842
[ 5.523384] ? bunzip2+0xa5b/0xa5b
[ 5.523384] ? error+0x51/0x51
[ 5.523384] ? __gunzip+0x842/0x842
[ 5.523384] gunzip+0x11/0x13
[ 5.523384] ? do_start+0x23/0x23
[ 5.523384] unpack_to_rootfs+0x355/0x645
[ 5.526774] ? do_start+0x23/0x23
[ 5.530049] ? kmsg_dump_rewind+0xd0/0xf3
[ 5.530049] ? do_collect+0xc9/0xc9
[ 5.530049] populate_rootfs+0xf4/0x308
[ 5.530049] ? unpack_to_rootfs+0x645/0x645
[ 5.530049] do_one_initcall+0x289/0x755
[ 5.533381] ? trace_event_raw_event_initcall_finish+0x270/0x270
[ 5.533381] ? kasan_check_write+0x20/0x20
[ 5.533381] ? ftrace_likely_update+0x8c/0xb0
[ 5.540051] ? do_early_param+0x11b/0x11b
[ 5.540051] ? cpumask_check+0x77/0x90
[ 5.543385] ? __asan_loadN+0xf/0x20
[ 5.543385] ? do_early_param+0x11b/0x11b
[ 5.543385] kernel_init_freeable+0x1c1/0x2e6
[ 5.543385] ? rest_init+0x110/0x110
[ 5.546774] kernel_init+0x11/0x200
[ 5.550058] ? rest_init+0x110/0x110
[ 5.550058] ret_from_fork+0x24/0x30
[ 5.550058] Code: 50 01 00 00 e8 b7 31 15 00 48 c7 c7 00 dc ff b5 e8 6e 2e d0 ff eb 0c 48 c7 c7 60 dc ff b5 e8 60 2e d0 ff 4c 89 ef e8 75 e8 fd ff <49> 8b 5d 00 48 8d bb 50 01 00 00 e8 65 e8 fd ff 48 8b bb 50 01
[ 5.553391] RIP: mem_cgroup_print_oom_memcg_name+0xdb/0x130 RSP: ffff88000320f458
[ 5.556791] CR2: 0000000000000000
[ 5.556791] _warn_unseeded_randomness: 6 callbacks suppressed
[ 5.556791] random: get_random_bytes called from init_oops_id+0x50/0x70 with crng_init=0
[ 5.560058] ---[ end trace 8cd4338bfad4c0db ]---
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email
Thanks,
Xiaolong
View attachment "config-4.17.0-rc6-00081-gc385a55" of type "text/plain" (115583 bytes)
View attachment "job-script" of type "text/plain" (4073 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (10520 bytes)
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