INFO: task hung in pipe_write (2)
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syzbot
Dec 1, 2019, 9:26:08 PM12/1/19
to syzkaller-a...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 62872f95 Merge 4.4.174 into android-4.4
git tree: https://android.googlesource.com/kernel/common android-4.4
console output: https://syzkaller.appspot.com/x/log.txt?x=12c6bdf2e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=47bc4dd423780c4a
dashboard link: https://syzkaller.appspot.com/bug?extid=299cf0f9e9b79d8112bf
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+299cf0...@syzkaller.appspotmail.com
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'syz-fuzzer' (2069) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
INFO: task syz-executor.2:29544 blocked for more than 140 seconds.
Not tainted 4.4.174+ #4
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2 D ffff880072a07a18 27296 29544 2124 0x00100004
ffff880072a07a18 ffff8800b74f2f80 153ce00e304a5030 ffff8800b74f2f80
0000000000000000 ffff8800b74f3800 ffff8801db71f180 ffff8801db71f1a8
ffff8801db71e898 ffff880083f6af80 ffff8800b74f2f80 ffffed000e540001
Call Trace:
[<ffffffff82709b79>] schedule+0x99/0x1d0 kernel/sched/core.c:3355
[<ffffffff8270a333>] schedule_preempt_disabled+0x13/0x20
kernel/sched/core.c:3388
[<ffffffff8270c492>] __mutex_lock_common kernel/locking/mutex.c:582
[inline]
[<ffffffff8270c492>] mutex_lock_nested+0x3c2/0xb80
kernel/locking/mutex.c:621
[<ffffffff814b0528>] pipe_lock_nested fs/pipe.c:65 [inline]
[<ffffffff814b0528>] pipe_lock fs/pipe.c:73 [inline]
[<ffffffff814b0528>] pipe_wait+0x1b8/0x1e0 fs/pipe.c:121
[<ffffffff814b0c05>] pipe_write+0x545/0xe70 fs/pipe.c:463
[<ffffffff81496ae8>] new_sync_write fs/read_write.c:480 [inline]
[<ffffffff81496ae8>] __vfs_write+0x2e8/0x3d0 fs/read_write.c:493
[<ffffffff81498612>] vfs_write+0x182/0x4e0 fs/read_write.c:540
[<ffffffff8149ac4c>] SYSC_write fs/read_write.c:587 [inline]
[<ffffffff8149ac4c>] SyS_write+0xdc/0x1c0 fs/read_write.c:579
[<ffffffff82718ba1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'init' (29617) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'syz-executor.3' (29585) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
1 lock held by syz-executor.2/29544:
#0: (&pipe->mutex/1){+.+.+.}, at: [<ffffffff814b0528>] pipe_lock_nested
fs/pipe.c:65 [inline]
#0: (&pipe->mutex/1){+.+.+.}, at: [<ffffffff814b0528>] pipe_lock
fs/pipe.c:73 [inline]
#0: (&pipe->mutex/1){+.+.+.}, at: [<ffffffff814b0528>]
pipe_wait+0x1b8/0x1e0 fs/pipe.c:121
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 20 Comm: khungtaskd Not tainted 4.4.174+ #4
task: ffff8801da6f2f80 task.stack: ffff8801d9ed8000
RIP: 0010:[<ffffffff8109b617>] [<ffffffff8109b617>] _flat_send_IPI_mask
arch/x86/kernel/apic/apic_flat_64.c:62 [inline]
RIP: 0010:[<ffffffff8109b617>] [<ffffffff8109b617>]
flat_send_IPI_mask+0xf7/0x1b0 arch/x86/kernel/apic/apic_flat_64.c:69
RSP: 0018:ffff8801d9edfc88 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000c00 RCX: 0000000000000000
RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fc300
RBP: ffff8801d9edfcb8 R08: 0000000000000018 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246
R13: 0000000003000000 R14: ffffffff82e5f2e0 R15: 0000000000000002
FS: 0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa6da32c9a8 CR3: 00000001d8788000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
0000000000000001 ffffffff82e5f2e0 ffffffff831a6ac0 fffffbfff0634c34
000000000001b6c0 0000000000000008 ffff8801d9edfcd8 ffffffff81092bee
0000000000000008 ffffffff82924260 ffff8801d9edfd30 ffffffff81ab8252
Call Trace:
[<ffffffff81092bee>] nmi_raise_cpu_backtrace+0x5e/0x80
arch/x86/kernel/apic/hw_nmi.c:33
[<ffffffff81ab8252>] nmi_trigger_all_cpu_backtrace.cold+0xa1/0xae
lib/nmi_backtrace.c:85
[<ffffffff81092ca4>] arch_trigger_all_cpu_backtrace+0x14/0x20
arch/x86/kernel/apic/hw_nmi.c:38
[<ffffffff813b4762>] trigger_all_cpu_backtrace include/linux/nmi.h:44
[inline]
[<ffffffff813b4762>] check_hung_task kernel/hung_task.c:125 [inline]
[<ffffffff813b4762>] check_hung_uninterruptible_tasks
kernel/hung_task.c:182 [inline]
[<ffffffff813b4762>] watchdog.cold+0xd3/0xee kernel/hung_task.c:238
[<ffffffff811342c3>] kthread+0x273/0x310 kernel/kthread.c:211
[<ffffffff82718fc5>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:537
Code: 00 c3 5f ff 80 e6 10 75 e1 41 c1 e5 18 44 89 2c 25 10 c3 5f ff 44 89
fa 09 da 80 cf 04 41 83 ff 02 0f 44 d3 89 14 25 00 c3 5f ff <41> f7 c4 00
02 00 00 75 1e 4c 89 e7 57 9d 0f 1f 44 00 00 e8 f1
NMI backtrace for cpu 1
CPU: 1 PID: 2070 Comm: syz-fuzzer Not tainted 4.4.174+ #4
task: ffff8800b7dd5f00 task.stack: ffff8801d7c98000
RIP: 0010:[<ffffffff8211e774>] [<ffffffff8211e774>]
lowmem_scan+0x404/0xbf0 drivers/staging/android/lowmemorykiller.c:125
RSP: 0018:ffff8801d7c9f3a0 EFLAGS: 00000246
RAX: 1ffff1003a4bc380 RBX: ffff8801d21a6340 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8211e754 RDI: ffff8801d25e1c00
RBP: ffff8801d7c9f440 R08: ffff8801d25e1f98 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8801d25e17c0 R14: 000000000000222d R15: 00000000000003e8
FS: 000000c4200283e8(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5584336b20 CR3: 00000001d8788000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
ffffffff8211e5af ffffffff00000816 00000000000001b8 0000000000000246
ffffffff82ea7320 ffff8800b7dd5f00 00000000000126df ffff8801d7c9f518
fffffbfff05c1200 0000223000000600 ffff8801d25e1f98 ffff8800b7fd5f00
Call Trace:
[<ffffffff813ee8e2>] do_shrink_slab mm/vmscan.c:357 [inline]
[<ffffffff813ee8e2>] shrink_slab.part.0+0x402/0xb30 mm/vmscan.c:455
[<ffffffff813f742c>] shrink_slab mm/vmscan.c:425 [inline]
[<ffffffff813f742c>] shrink_zone+0x4bc/0x610 mm/vmscan.c:2448
[<ffffffff813f7bef>] shrink_zones mm/vmscan.c:2603 [inline]
[<ffffffff813f7bef>] do_try_to_free_pages mm/vmscan.c:2653 [inline]
[<ffffffff813f7bef>] try_to_free_pages+0x66f/0x1260 mm/vmscan.c:2861
[<ffffffff813d09af>] __perform_reclaim mm/page_alloc.c:2915 [inline]
[<ffffffff813d09af>] __alloc_pages_direct_reclaim mm/page_alloc.c:2936
[inline]
[<ffffffff813d09af>] __alloc_pages_slowpath mm/page_alloc.c:3201 [inline]
[<ffffffff813d09af>] __alloc_pages_nodemask+0x8af/0x14b0
mm/page_alloc.c:3313
[<ffffffff813dc242>] __alloc_pages include/linux/gfp.h:415 [inline]
[<ffffffff813dc242>] __alloc_pages_node include/linux/gfp.h:428 [inline]
[<ffffffff813dc242>] alloc_pages_node include/linux/gfp.h:442 [inline]
[<ffffffff813dc242>] __page_cache_alloc include/linux/pagemap.h:226
[inline]
[<ffffffff813dc242>] page_cache_alloc_readahead
include/linux/pagemap.h:242 [inline]
[<ffffffff813dc242>] __do_page_cache_readahead+0x222/0x840
mm/readahead.c:184
[<ffffffff813bf6de>] ra_submit mm/internal.h:55 [inline]
[<ffffffff813bf6de>] do_sync_mmap_readahead mm/filemap.c:1917 [inline]
[<ffffffff813bf6de>] filemap_fault+0x74e/0xc10 mm/filemap.c:1994
[<ffffffff81665ed2>] ext4_filemap_fault+0x72/0xa0 fs/ext4/inode.c:5558
[<ffffffff8142e82a>] __do_fault+0x1ca/0x350 mm/memory.c:2822
[<ffffffff8143b9cc>] do_read_fault mm/memory.c:3012 [inline]
[<ffffffff8143b9cc>] do_fault mm/memory.c:3177 [inline]
[<ffffffff8143b9cc>] handle_pte_fault mm/memory.c:3346 [inline]
[<ffffffff8143b9cc>] __handle_mm_fault mm/memory.c:3474 [inline]
[<ffffffff8143b9cc>] handle_mm_fault+0x1cfc/0x3140 mm/memory.c:3503
[<ffffffff810aaa4e>] __do_page_fault+0x28e/0x7f0 arch/x86/mm/fault.c:1243
[<ffffffff810ab008>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1306
[<ffffffff82719e35>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:1064
Code: 75 ac 48 89 5d b8 e8 9c ae 1e ff 49 8d bd 40 04 00 00 48 89 f8 48 c1
e8 03 42 80 3c 20 00 0f 85 34 06 00 00 49 8b 9d 40 04 00 00 <4c> 8d ab c0
fb ff ff 48 81 fb 00 56 e1 82 0f 84 39 01 00 00 e8
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'syz-fuzzer' (2070) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'init' (1) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'syz-fuzzer' (2069) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'syz-fuzzer' (2082) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'syz-fuzzer' (2069) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'init' (1) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following crash on:
HEAD commit: 62872f95 Merge 4.4.174 into android-4.4
git tree: https://android.googlesource.com/kernel/common android-4.4
console output: https://syzkaller.appspot.com/x/log.txt?x=12c6bdf2e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=47bc4dd423780c4a
dashboard link: https://syzkaller.appspot.com/bug?extid=299cf0f9e9b79d8112bf
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+299cf0...@syzkaller.appspotmail.com
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'syz-fuzzer' (2069) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
INFO: task syz-executor.2:29544 blocked for more than 140 seconds.
Not tainted 4.4.174+ #4
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2 D ffff880072a07a18 27296 29544 2124 0x00100004
ffff880072a07a18 ffff8800b74f2f80 153ce00e304a5030 ffff8800b74f2f80
0000000000000000 ffff8800b74f3800 ffff8801db71f180 ffff8801db71f1a8
ffff8801db71e898 ffff880083f6af80 ffff8800b74f2f80 ffffed000e540001
Call Trace:
[<ffffffff82709b79>] schedule+0x99/0x1d0 kernel/sched/core.c:3355
[<ffffffff8270a333>] schedule_preempt_disabled+0x13/0x20
kernel/sched/core.c:3388
[<ffffffff8270c492>] __mutex_lock_common kernel/locking/mutex.c:582
[inline]
[<ffffffff8270c492>] mutex_lock_nested+0x3c2/0xb80
kernel/locking/mutex.c:621
[<ffffffff814b0528>] pipe_lock_nested fs/pipe.c:65 [inline]
[<ffffffff814b0528>] pipe_lock fs/pipe.c:73 [inline]
[<ffffffff814b0528>] pipe_wait+0x1b8/0x1e0 fs/pipe.c:121
[<ffffffff814b0c05>] pipe_write+0x545/0xe70 fs/pipe.c:463
[<ffffffff81496ae8>] new_sync_write fs/read_write.c:480 [inline]
[<ffffffff81496ae8>] __vfs_write+0x2e8/0x3d0 fs/read_write.c:493
[<ffffffff81498612>] vfs_write+0x182/0x4e0 fs/read_write.c:540
[<ffffffff8149ac4c>] SYSC_write fs/read_write.c:587 [inline]
[<ffffffff8149ac4c>] SyS_write+0xdc/0x1c0 fs/read_write.c:579
[<ffffffff82718ba1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'init' (29617) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'syz-executor.3' (29585) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
1 lock held by syz-executor.2/29544:
#0: (&pipe->mutex/1){+.+.+.}, at: [<ffffffff814b0528>] pipe_lock_nested
fs/pipe.c:65 [inline]
#0: (&pipe->mutex/1){+.+.+.}, at: [<ffffffff814b0528>] pipe_lock
fs/pipe.c:73 [inline]
#0: (&pipe->mutex/1){+.+.+.}, at: [<ffffffff814b0528>]
pipe_wait+0x1b8/0x1e0 fs/pipe.c:121
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 20 Comm: khungtaskd Not tainted 4.4.174+ #4
task: ffff8801da6f2f80 task.stack: ffff8801d9ed8000
RIP: 0010:[<ffffffff8109b617>] [<ffffffff8109b617>] _flat_send_IPI_mask
arch/x86/kernel/apic/apic_flat_64.c:62 [inline]
RIP: 0010:[<ffffffff8109b617>] [<ffffffff8109b617>]
flat_send_IPI_mask+0xf7/0x1b0 arch/x86/kernel/apic/apic_flat_64.c:69
RSP: 0018:ffff8801d9edfc88 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000c00 RCX: 0000000000000000
RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fc300
RBP: ffff8801d9edfcb8 R08: 0000000000000018 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246
R13: 0000000003000000 R14: ffffffff82e5f2e0 R15: 0000000000000002
FS: 0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa6da32c9a8 CR3: 00000001d8788000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
0000000000000001 ffffffff82e5f2e0 ffffffff831a6ac0 fffffbfff0634c34
000000000001b6c0 0000000000000008 ffff8801d9edfcd8 ffffffff81092bee
0000000000000008 ffffffff82924260 ffff8801d9edfd30 ffffffff81ab8252
Call Trace:
[<ffffffff81092bee>] nmi_raise_cpu_backtrace+0x5e/0x80
arch/x86/kernel/apic/hw_nmi.c:33
[<ffffffff81ab8252>] nmi_trigger_all_cpu_backtrace.cold+0xa1/0xae
lib/nmi_backtrace.c:85
[<ffffffff81092ca4>] arch_trigger_all_cpu_backtrace+0x14/0x20
arch/x86/kernel/apic/hw_nmi.c:38
[<ffffffff813b4762>] trigger_all_cpu_backtrace include/linux/nmi.h:44
[inline]
[<ffffffff813b4762>] check_hung_task kernel/hung_task.c:125 [inline]
[<ffffffff813b4762>] check_hung_uninterruptible_tasks
kernel/hung_task.c:182 [inline]
[<ffffffff813b4762>] watchdog.cold+0xd3/0xee kernel/hung_task.c:238
[<ffffffff811342c3>] kthread+0x273/0x310 kernel/kthread.c:211
[<ffffffff82718fc5>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:537
Code: 00 c3 5f ff 80 e6 10 75 e1 41 c1 e5 18 44 89 2c 25 10 c3 5f ff 44 89
fa 09 da 80 cf 04 41 83 ff 02 0f 44 d3 89 14 25 00 c3 5f ff <41> f7 c4 00
02 00 00 75 1e 4c 89 e7 57 9d 0f 1f 44 00 00 e8 f1
NMI backtrace for cpu 1
CPU: 1 PID: 2070 Comm: syz-fuzzer Not tainted 4.4.174+ #4
task: ffff8800b7dd5f00 task.stack: ffff8801d7c98000
RIP: 0010:[<ffffffff8211e774>] [<ffffffff8211e774>]
lowmem_scan+0x404/0xbf0 drivers/staging/android/lowmemorykiller.c:125
RSP: 0018:ffff8801d7c9f3a0 EFLAGS: 00000246
RAX: 1ffff1003a4bc380 RBX: ffff8801d21a6340 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8211e754 RDI: ffff8801d25e1c00
RBP: ffff8801d7c9f440 R08: ffff8801d25e1f98 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8801d25e17c0 R14: 000000000000222d R15: 00000000000003e8
FS: 000000c4200283e8(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5584336b20 CR3: 00000001d8788000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
ffffffff8211e5af ffffffff00000816 00000000000001b8 0000000000000246
ffffffff82ea7320 ffff8800b7dd5f00 00000000000126df ffff8801d7c9f518
fffffbfff05c1200 0000223000000600 ffff8801d25e1f98 ffff8800b7fd5f00
Call Trace:
[<ffffffff813ee8e2>] do_shrink_slab mm/vmscan.c:357 [inline]
[<ffffffff813ee8e2>] shrink_slab.part.0+0x402/0xb30 mm/vmscan.c:455
[<ffffffff813f742c>] shrink_slab mm/vmscan.c:425 [inline]
[<ffffffff813f742c>] shrink_zone+0x4bc/0x610 mm/vmscan.c:2448
[<ffffffff813f7bef>] shrink_zones mm/vmscan.c:2603 [inline]
[<ffffffff813f7bef>] do_try_to_free_pages mm/vmscan.c:2653 [inline]
[<ffffffff813f7bef>] try_to_free_pages+0x66f/0x1260 mm/vmscan.c:2861
[<ffffffff813d09af>] __perform_reclaim mm/page_alloc.c:2915 [inline]
[<ffffffff813d09af>] __alloc_pages_direct_reclaim mm/page_alloc.c:2936
[inline]
[<ffffffff813d09af>] __alloc_pages_slowpath mm/page_alloc.c:3201 [inline]
[<ffffffff813d09af>] __alloc_pages_nodemask+0x8af/0x14b0
mm/page_alloc.c:3313
[<ffffffff813dc242>] __alloc_pages include/linux/gfp.h:415 [inline]
[<ffffffff813dc242>] __alloc_pages_node include/linux/gfp.h:428 [inline]
[<ffffffff813dc242>] alloc_pages_node include/linux/gfp.h:442 [inline]
[<ffffffff813dc242>] __page_cache_alloc include/linux/pagemap.h:226
[inline]
[<ffffffff813dc242>] page_cache_alloc_readahead
include/linux/pagemap.h:242 [inline]
[<ffffffff813dc242>] __do_page_cache_readahead+0x222/0x840
mm/readahead.c:184
[<ffffffff813bf6de>] ra_submit mm/internal.h:55 [inline]
[<ffffffff813bf6de>] do_sync_mmap_readahead mm/filemap.c:1917 [inline]
[<ffffffff813bf6de>] filemap_fault+0x74e/0xc10 mm/filemap.c:1994
[<ffffffff81665ed2>] ext4_filemap_fault+0x72/0xa0 fs/ext4/inode.c:5558
[<ffffffff8142e82a>] __do_fault+0x1ca/0x350 mm/memory.c:2822
[<ffffffff8143b9cc>] do_read_fault mm/memory.c:3012 [inline]
[<ffffffff8143b9cc>] do_fault mm/memory.c:3177 [inline]
[<ffffffff8143b9cc>] handle_pte_fault mm/memory.c:3346 [inline]
[<ffffffff8143b9cc>] __handle_mm_fault mm/memory.c:3474 [inline]
[<ffffffff8143b9cc>] handle_mm_fault+0x1cfc/0x3140 mm/memory.c:3503
[<ffffffff810aaa4e>] __do_page_fault+0x28e/0x7f0 arch/x86/mm/fault.c:1243
[<ffffffff810ab008>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1306
[<ffffffff82719e35>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:1064
Code: 75 ac 48 89 5d b8 e8 9c ae 1e ff 49 8d bd 40 04 00 00 48 89 f8 48 c1
e8 03 42 80 3c 20 00 0f 85 34 06 00 00 49 8b 9d 40 04 00 00 <4c> 8d ab c0
fb ff ff 48 81 fb 00 56 e1 82 0f 84 39 01 00 00 e8
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'syz-fuzzer' (2070) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'init' (1) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'syz-fuzzer' (2069) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'syz-fuzzer' (2082) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'syz-fuzzer' (2069) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
lowmemorykiller: Killing 'syz-executor.2' (29544) (tgid 29540), adj 1000,
to free 38400kB on behalf of 'init' (1) because
cache 440kB is below limit 6144kB for oom_score_adj 0
Free memory is -1288kB above reserved
---
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See https://goo.gl/tpsmEJ for more information about syzbot.
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syzbot
Mar 30, 2020, 9:26:08 PM3/30/20
to syzkaller-a...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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