From: syzbot <syzbot+a76129f18c89f3e2ddd4@syzkaller.appspotmail.com>
To: ak@linux.intel.com, akpm@linux-foundation.org,
hannes@cmpxchg.org, jack@suse.cz, jrdr.linux@gmail.com,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
mawilcox@microsoft.com, mgorman@techsingularity.net,
syzkaller-bugs@googlegroups.com
Subject: possible deadlock in __do_page_fault
Date: Thu, 20 Sep 2018 14:04:05 -0700 [thread overview]
Message-ID: <000000000000f7a28e057653dc6e@google.com> (raw)
Hello,
syzbot found the following crash on:
HEAD commit: a0cb0cabe4bb Add linux-next specific files for 20180920
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=15139721400000
kernel config: https://syzkaller.appspot.com/x/.config?x=786006c5dafbadf6
dashboard link: https://syzkaller.appspot.com/bug?extid=a76129f18c89f3e2ddd4
compiler: gcc (GCC) 8.0.1 20180413 (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+a76129f18c89f3e2ddd4@syzkaller.appspotmail.com
======================================================
WARNING: possible circular locking dependency detected
4.19.0-rc4-next-20180920+ #76 Not tainted
------------------------------------------------------
syz-executor3/21327 is trying to acquire lock:
000000009bc5286f (&mm->mmap_sem){++++}, at: __do_page_fault+0xb61/0xec0
arch/x86/mm/fault.c:1333
but task is already holding lock:
00000000a2c51c08 (&sb->s_type->i_mutex_key#10){+.+.}, at: inode_lock
include/linux/fs.h:745 [inline]
00000000a2c51c08 (&sb->s_type->i_mutex_key#10){+.+.}, at:
generic_file_write_iter+0xed/0x870 mm/filemap.c:3304
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&sb->s_type->i_mutex_key#10){+.+.}:
down_write+0x8a/0x130 kernel/locking/rwsem.c:70
inode_lock include/linux/fs.h:745 [inline]
shmem_fallocate+0x18b/0x12c0 mm/shmem.c:2651
ashmem_shrink_scan+0x238/0x660 drivers/staging/android/ashmem.c:455
ashmem_ioctl+0x3ae/0x13a0 drivers/staging/android/ashmem.c:797
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685
ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702
__do_sys_ioctl fs/ioctl.c:709 [inline]
__se_sys_ioctl fs/ioctl.c:707 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
-> #1 (ashmem_mutex){+.+.}:
__mutex_lock_common kernel/locking/mutex.c:925 [inline]
__mutex_lock+0x166/0x1700 kernel/locking/mutex.c:1072
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
ashmem_mmap+0x55/0x520 drivers/staging/android/ashmem.c:361
call_mmap include/linux/fs.h:1830 [inline]
mmap_region+0xe82/0x1cd0 mm/mmap.c:1762
do_mmap+0xa10/0x1220 mm/mmap.c:1535
do_mmap_pgoff include/linux/mm.h:2298 [inline]
vm_mmap_pgoff+0x213/0x2c0 mm/util.c:357
ksys_mmap_pgoff+0x4da/0x660 mm/mmap.c:1585
__do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline]
__se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline]
__x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
-> #0 (&mm->mmap_sem){++++}:
lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3900
down_read+0x8d/0x120 kernel/locking/rwsem.c:24
__do_page_fault+0xb61/0xec0 arch/x86/mm/fault.c:1333
do_page_fault+0xed/0x7d1 arch/x86/mm/fault.c:1472
page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1139
fault_in_pages_readable include/linux/pagemap.h:601 [inline]
iov_iter_fault_in_readable+0x1b4/0x450 lib/iov_iter.c:421
generic_perform_write+0x216/0x6a0 mm/filemap.c:3144
__generic_file_write_iter+0x26e/0x630 mm/filemap.c:3279
generic_file_write_iter+0x436/0x870 mm/filemap.c:3307
call_write_iter include/linux/fs.h:1825 [inline]
do_iter_readv_writev+0x8b0/0xa80 fs/read_write.c:680
do_iter_write+0x185/0x5f0 fs/read_write.c:959
vfs_writev+0x1f1/0x360 fs/read_write.c:1004
do_pwritev+0x1cc/0x280 fs/read_write.c:1093
__do_sys_pwritev fs/read_write.c:1140 [inline]
__se_sys_pwritev fs/read_write.c:1135 [inline]
__x64_sys_pwritev+0x9a/0xf0 fs/read_write.c:1135
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
other info that might help us debug this:
Chain exists of:
&mm->mmap_sem --> ashmem_mutex --> &sb->s_type->i_mutex_key#10
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&sb->s_type->i_mutex_key#10);
lock(ashmem_mutex);
lock(&sb->s_type->i_mutex_key#10);
lock(&mm->mmap_sem);
*** DEADLOCK ***
2 locks held by syz-executor3/21327:
#0: 000000003de4eab1 (sb_writers#3){.+.+}, at: file_start_write
include/linux/fs.h:2784 [inline]
#0: 000000003de4eab1 (sb_writers#3){.+.+}, at: vfs_writev+0x2bd/0x360
fs/read_write.c:1003
#1: 00000000a2c51c08 (&sb->s_type->i_mutex_key#10){+.+.}, at: inode_lock
include/linux/fs.h:745 [inline]
#1: 00000000a2c51c08 (&sb->s_type->i_mutex_key#10){+.+.}, at:
generic_file_write_iter+0xed/0x870 mm/filemap.c:3304
stack backtrace:
CPU: 1 PID: 21327 Comm: syz-executor3 Not tainted 4.19.0-rc4-next-20180920+
#76
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d3/0x2c4 lib/dump_stack.c:113
print_circular_bug.isra.33.cold.54+0x1bd/0x27d
kernel/locking/lockdep.c:1221
check_prev_add kernel/locking/lockdep.c:1861 [inline]
check_prevs_add kernel/locking/lockdep.c:1974 [inline]
validate_chain kernel/locking/lockdep.c:2415 [inline]
__lock_acquire+0x33e4/0x4ec0 kernel/locking/lockdep.c:3411
lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3900
down_read+0x8d/0x120 kernel/locking/rwsem.c:24
__do_page_fault+0xb61/0xec0 arch/x86/mm/fault.c:1333
do_page_fault+0xed/0x7d1 arch/x86/mm/fault.c:1472
page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1139
RIP: 0010:fault_in_pages_readable include/linux/pagemap.h:601 [inline]
RIP: 0010:iov_iter_fault_in_readable+0x1b4/0x450 lib/iov_iter.c:421
Code: fd 49 39 dc 76 17 eb 3c e8 e9 a0 ef fd 49 81 c4 00 10 00 00 4c 39 a5
28 ff ff ff 72 2e e8 d4 a0 ef fd 0f 1f 00 0f ae e8 31 db <41> 8a 04 24 0f
1f 00 31 ff 89 de 88 85 58 ff ff ff e8 c6 a1 ef fd
RSP: 0018:ffff88018dfe7650 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90005662000
RDX: 00000000000001c2 RSI: ffffffff838daf1c RDI: 0000000000000005
RBP: ffff88018dfe7728 R08: ffff880198ad2240 R09: ffffed00319dc039
R10: ffffed00319dc039 R11: ffff88018cee01cb R12: 0000000020012000
R13: 0000000000000001 R14: 0000000000000001 R15: ffff88018dfe7c50
generic_perform_write+0x216/0x6a0 mm/filemap.c:3144
__generic_file_write_iter+0x26e/0x630 mm/filemap.c:3279
generic_file_write_iter+0x436/0x870 mm/filemap.c:3307
call_write_iter include/linux/fs.h:1825 [inline]
do_iter_readv_writev+0x8b0/0xa80 fs/read_write.c:680
do_iter_write+0x185/0x5f0 fs/read_write.c:959
vfs_writev+0x1f1/0x360 fs/read_write.c:1004
do_pwritev+0x1cc/0x280 fs/read_write.c:1093
__do_sys_pwritev fs/read_write.c:1140 [inline]
__se_sys_pwritev fs/read_write.c:1135 [inline]
__x64_sys_pwritev+0x9a/0xf0 fs/read_write.c:1135
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457679
Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f96ef162c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 00007f96ef1636d4 RCX: 0000000000457679
RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d4a88 R14: 00000000004c31d4 R15: 0000000000000000
kobject: 'loop2' (00000000dc629c38): kobject_uevent_env
kobject: 'loop2' (00000000dc629c38): fill_kobj_path: path
= '/devices/virtual/block/loop2'
FAULT_FLAG_ALLOW_RETRY missing 30
kobject: 'loop1' (00000000980d23a1): kobject_uevent_env
kobject: 'loop1' (00000000980d23a1): fill_kobj_path: path
= '/devices/virtual/block/loop1'
CPU: 1 PID: 21327 Comm: syz-executor3 Not tainted 4.19.0-rc4-next-20180920+
#76
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1d3/0x2c4 lib/dump_stack.c:113
handle_userfault.cold.33+0x47/0x62 fs/userfaultfd.c:432
do_anonymous_page mm/memory.c:2915 [inline]
handle_pte_fault mm/memory.c:3732 [inline]
__handle_mm_fault+0x45ed/0x53e0 mm/memory.c:3858
handle_mm_fault+0x54f/0xc70 mm/memory.c:3895
__do_page_fault+0x673/0xec0 arch/x86/mm/fault.c:1397
do_page_fault+0xed/0x7d1 arch/x86/mm/fault.c:1472
page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1139
RIP: 0010:fault_in_pages_readable include/linux/pagemap.h:601 [inline]
RIP: 0010:iov_iter_fault_in_readable+0x1b4/0x450 lib/iov_iter.c:421
Code: fd 49 39 dc 76 17 eb 3c e8 e9 a0 ef fd 49 81 c4 00 10 00 00 4c 39 a5
28 ff ff ff 72 2e e8 d4 a0 ef fd 0f 1f 00 0f ae e8 31 db <41> 8a 04 24 0f
1f 00 31 ff 89 de 88 85 58 ff ff ff e8 c6 a1 ef fd
RSP: 0018:ffff88018dfe7650 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90005662000
RDX: 00000000000001c2 RSI: ffffffff838daf1c RDI: 0000000000000005
RBP: ffff88018dfe7728 R08: ffff880198ad2240 R09: ffffed00319dc039
R10: ffffed00319dc039 R11: ffff88018cee01cb R12: 0000000020012000
R13: 0000000000000001 R14: 0000000000000001 R15: ffff88018dfe7c50
generic_perform_write+0x216/0x6a0 mm/filemap.c:3144
__generic_file_write_iter+0x26e/0x630 mm/filemap.c:3279
generic_file_write_iter+0x436/0x870 mm/filemap.c:3307
call_write_iter include/linux/fs.h:1825 [inline]
do_iter_readv_writev+0x8b0/0xa80 fs/read_write.c:680
do_iter_write+0x185/0x5f0 fs/read_write.c:959
vfs_writev+0x1f1/0x360 fs/read_write.c:1004
do_pwritev+0x1cc/0x280 fs/read_write.c:1093
__do_sys_pwritev fs/read_write.c:1140 [inline]
__se_sys_pwritev fs/read_write.c:1135 [inline]
__x64_sys_pwritev+0x9a/0xf0 fs/read_write.c:1135
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457679
Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
ff 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f96ef162c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 00007f96ef1636d4 RCX: 0000000000457679
RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d4a88 R14: 00000000004c31d4 R15: 0000000000000000
kobject: 'loop4' (000000004119f3b1): kobject_uevent_env
kobject: 'loop4' (000000004119f3b1): fill_kobj_path: path
= '/devices/virtual/block/loop4'
kobject: 'loop0' (00000000ee0adfaf): kobject_uevent_env
kobject: 'loop0' (00000000ee0adfaf): fill_kobj_path: path
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000699d1086): kobject_uevent_env
kobject: 'loop5' (00000000699d1086): fill_kobj_path: path
= '/devices/virtual/block/loop5'
kobject: 'loop1' (00000000980d23a1): kobject_uevent_env
kobject: 'loop1' (00000000980d23a1): fill_kobj_path: path
= '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000aff594d4): kobject_uevent_env
kobject: 'loop3' (00000000aff594d4): fill_kobj_path: path
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000699d1086): kobject_uevent_env
kobject: 'loop5' (00000000699d1086): fill_kobj_path: path
= '/devices/virtual/block/loop5'
kobject: 'loop0' (00000000ee0adfaf): kobject_uevent_env
kobject: 'loop0' (00000000ee0adfaf): fill_kobj_path: path
= '/devices/virtual/block/loop0'
kobject: 'loop1' (00000000980d23a1): kobject_uevent_env
kobject: 'loop1' (00000000980d23a1): fill_kobj_path: path
= '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000dc629c38): kobject_uevent_env
kobject: 'loop2' (00000000dc629c38): fill_kobj_path: path
= '/devices/virtual/block/loop2'
kobject: 'loop1' (00000000980d23a1): kobject_uevent_env
kobject: 'loop1' (00000000980d23a1): fill_kobj_path: path
= '/devices/virtual/block/loop1'
kobject: 'loop5' (00000000699d1086): kobject_uevent_env
kobject: 'loop5' (00000000699d1086): fill_kobj_path: path
= '/devices/virtual/block/loop5'
kobject: 'loop0' (00000000ee0adfaf): kobject_uevent_env
kobject: 'loop0' (00000000ee0adfaf): fill_kobj_path: path
= '/devices/virtual/block/loop0'
kobject: 'loop4' (000000004119f3b1): kobject_uevent_env
kobject: 'loop4' (000000004119f3b1): fill_kobj_path: path
= '/devices/virtual/block/loop4'
kobject: 'loop0' (00000000ee0adfaf): kobject_uevent_env
kobject: 'loop0' (00000000ee0adfaf): fill_kobj_path: path
= '/devices/virtual/block/loop0'
kobject: 'loop2' (00000000dc629c38): kobject_uevent_env
kobject: 'loop2' (00000000dc629c38): fill_kobj_path: path
= '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000aff594d4): kobject_uevent_env
kobject: 'loop3' (00000000aff594d4): fill_kobj_path: path
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000699d1086): kobject_uevent_env
kobject: 'loop5' (00000000699d1086): fill_kobj_path: path
= '/devices/virtual/block/loop5'
kobject: 'loop4' (000000004119f3b1): kobject_uevent_env
kobject: 'loop4' (000000004119f3b1): fill_kobj_path: path
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000dc629c38): kobject_uevent_env
kobject: 'loop2' (00000000dc629c38): fill_kobj_path: path
= '/devices/virtual/block/loop2'
kobject: 'loop0' (00000000ee0adfaf): kobject_uevent_env
kobject: 'loop0' (00000000ee0adfaf): fill_kobj_path: path
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000699d1086): kobject_uevent_env
kobject: 'loop5' (00000000699d1086): fill_kobj_path: path
= '/devices/virtual/block/loop5'
kobject: 'loop3' (00000000aff594d4): kobject_uevent_env
kobject: 'loop3' (00000000aff594d4): fill_kobj_path: path
= '/devices/virtual/block/loop3'
kobject: 'loop1' (00000000980d23a1): kobject_uevent_env
kobject: 'loop1' (00000000980d23a1): fill_kobj_path: path
= '/devices/virtual/block/loop1'
kobject: 'loop4' (000000004119f3b1): kobject_uevent_env
kobject: 'loop4' (000000004119f3b1): fill_kobj_path: path
= '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000dc629c38): kobject_uevent_env
kobject: 'loop2' (00000000dc629c38): fill_kobj_path: path
= '/devices/virtual/block/loop2'
kobject: 'loop0' (00000000ee0adfaf): kobject_uevent_env
kobject: 'loop0' (00000000ee0adfaf): fill_kobj_path: path
= '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000aff594d4): kobject_uevent_env
kobject: 'loop3' (00000000aff594d4): fill_kobj_path: path
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000699d1086): kobject_uevent_env
kobject: 'loop5' (00000000699d1086): fill_kobj_path: path
= '/devices/virtual/block/loop5'
kobject: 'loop1' (00000000980d23a1): kobject_uevent_env
kobject: 'loop1' (00000000980d23a1): fill_kobj_path: path
= '/devices/virtual/block/loop1'
kobject: 'loop0' (00000000ee0adfaf): kobject_uevent_env
kobject: 'loop0' (00000000ee0adfaf): fill_kobj_path: path
= '/devices/virtual/block/loop0'
kobject: 'loop2' (00000000dc629c38): kobject_uevent_env
kobject: 'loop2' (00000000dc629c38): fill_kobj_path: path
= '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000aff594d4): kobject_uevent_env
kobject: 'loop3' (00000000aff594d4): fill_kobj_path: path
= '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000699d1086): kobject_uevent_env
kobject: 'loop5' (00000000699d1086): fill_kobj_path: path
= '/devices/virtual/block/loop5'
kobject: 'loop4' (000000004119f3b1): kobject_uevent_env
kobject: 'loop4' (000000004119f3b1): fill_kobj_path: path
= '/devices/virtual/block/loop4'
kobject: 'loop1' (00000000980d23a1): kobject_uevent_env
kobject: 'loop1' (00000000980d23a1): fill_kobj_path: path
= '/devices/virtual/block/loop1'
kobject: 'loop0' (00000000ee0adfaf): kobject_uevent_env
kobject: 'loop0' (00000000ee0adfaf): fill_kobj_path: path
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000699d1086): kobject_uevent_env
kobject: 'loop5' (00000000699d1086): fill_kobj_path: path
= '/devices/virtual/block/loop5'
kobject: 'loop2' (00000000dc629c38): kobject_uevent_env
kobject: 'loop2' (00000000dc629c38): fill_kobj_path: path
= '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000aff594d4): kobject_uevent_env
kobject: 'loop3' (00000000aff594d4): fill_kobj_path: path
= '/devices/virtual/block/loop3'
kobject: 'loop4' (000000004119f3b1): kobject_uevent_env
kobject: 'loop4' (000000004119f3b1): fill_kobj_path: path
= '/devices/virtual/block/loop4'
kobject: 'loop0' (00000000ee0adfaf): kobject_uevent_env
kobject: 'loop0' (00000000ee0adfaf): fill_kobj_path: path
= '/devices/virtual/block/loop0'
kobject: 'loop1' (00000000980d23a1): kobject_uevent_env
kobject: 'loop1' (00000000980d23a1): fill_kobj_path: path
= '/devices/virtual/block/loop1'
audit: type=1326 audit(2000000012.020:46): auid=4294967295 uid=0 gid=0
ses=4294967295 subj==unconfined pid=21534 comm="syz-executor0"
exe="/root/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0
ip=0x457679 code=0x0
kobject: 'loop5' (00000000699d1086): kobject_uevent_env
kobject: 'loop5' (00000000699d1086): fill_kobj_path: path
= '/devices/virtual/block/loop5'
kobject: 'loop3' (00000000aff594d4): kobject_uevent_env
kobject: 'loop3' (00000000aff594d4): fill_kobj_path: path
= '/devices/virtual/block/loop3'
kobject: 'loop2' (00000000dc629c38): kobject_uevent_env
kobject: 'loop2' (00000000dc629c38): fill_kobj_path: path
= '/devices/virtual/block/loop2'
kobject: 'loop2' (00000000dc629c38): kobject_uevent_env
kobject: 'loop2' (00000000dc629c38): fill_kobj_path: path
= '/devices/virtual/block/loop2'
kobject: 'loop2' (00000000dc629c38): kobject_uevent_env
kobject: 'loop2' (00000000dc629c38): fill_kobj_path: path
= '/devices/virtual/block/loop2'
kobject: 'loop1' (00000000980d23a1): kobject_uevent_env
kobject: 'loop1' (00000000980d23a1): fill_kobj_path: path
= '/devices/virtual/block/loop1'
kobject: 'loop0' (00000000ee0adfaf): kobject_uevent_env
kobject: 'loop0' (00000000ee0adfaf): fill_kobj_path: path
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000699d1086): kobject_uevent_env
kobject: 'loop5' (00000000699d1086): fill_kobj_path: path
= '/devices/virtual/block/loop5'
audit: type=1326 audit(2000000012.950:47): auid=4294967295 uid=0 gid=0
ses=4294967295 subj==unconfined pid=21566 comm="syz-executor0"
exe="/root/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0
ip=0x457679 code=0x0
kobject: 'loop2' (00000000dc629c38): kobject_uevent_env
kobject: 'loop2' (00000000dc629c38): fill_kobj_path: path
= '/devices/virtual/block/loop2'
kobject: 'loop2' (00000000dc629c38): kobject_uevent_env
kobject: 'loop2' (00000000dc629c38): fill_kobj_path: path
= '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000aff594d4): kobject_uevent_env
kobject: 'loop3' (00000000aff594d4): fill_kobj_path: path
= '/devices/virtual/block/loop3'
kobject: 'loop4' (000000004119f3b1): kobject_uevent_env
kobject: 'loop4' (000000004119f3b1): fill_kobj_path: path
= '/devices/virtual/block/loop4'
audit: type=1326 audit(2000000013.460:48): auid=4294967295 uid=0 gid=0
ses=4294967295 subj==unconfined pid=21585 comm="syz-executor4"
exe="/root/syz-executor4" sig=31 arch=c000003e syscall=202 compat=0
ip=0x457679 code=0x0
audit: type=1326 audit(2000000013.510:49): auid=4294967295 uid=0 gid=0
ses=4294967295 subj==unconfined pid=21588 comm="syz-executor2"
exe="/root/syz-executor2" sig=31 arch=c000003e syscall=202 compat=0
ip=0x457679 code=0x0
kobject: 'loop1' (00000000980d23a1): kobject_uevent_env
kobject: 'loop1' (00000000980d23a1): fill_kobj_path: path
= '/devices/virtual/block/loop1'
kobject: 'loop0' (00000000ee0adfaf): kobject_uevent_env
kobject: 'loop0' (00000000ee0adfaf): fill_kobj_path: path
= '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000699d1086): kobject_uevent_env
audit: type=1326 audit(2000000013.800:50): auid=4294967295 uid=0 gid=0
ses=4294967295 subj==unconfined pid=21601 comm="syz-executor0"
exe="/root/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0
ip=0x457679 code=0x0
kobject: 'loop5' (00000000699d1086): fill_kobj_path: path
= '/devices/virtual/block/loop5'
kobject: 'loop5' (00000000699d1086): kobject_uevent_env
kobject: 'loop5' (00000000699d1086): fill_kobj_path: path
= '/devices/virtual/block/loop5'
kobject: 'loop5' (00000000699d1086): kobject_uevent_env
kobject: 'loop5' (00000000699d1086): fill_kobj_path: path
= '/devices/virtual/block/loop5'
---
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 syzkaller@googlegroups.com.
syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with
syzbot.
next reply other threads:[~2018-09-20 21:04 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-20 21:04 syzbot [this message]
2018-09-20 21:10 ` possible deadlock in __do_page_fault Andrew Morton
2018-09-20 21:12 ` Todd Kjos
2018-09-20 23:33 ` Joel Fernandes
2018-09-21 6:37 ` Dmitry Vyukov
2018-09-21 23:21 ` Andrew Morton
2019-01-22 10:02 ` Tetsuo Handa
2019-01-22 10:12 ` Dmitry Vyukov
2019-01-22 10:32 ` Tetsuo Handa
2019-01-22 13:52 ` Dmitry Vyukov
2019-01-22 13:54 ` Dmitry Vyukov
2019-01-22 14:08 ` syzbot
2019-01-22 14:08 ` syzbot
2019-01-22 15:32 ` Joel Fernandes
2019-01-23 2:01 ` Tetsuo Handa
2019-01-23 15:57 ` Joel Fernandes
2019-01-24 1:52 ` Tetsuo Handa
2019-01-24 13:46 ` Joel Fernandes
2019-01-25 16:02 ` Tetsuo Handa
2019-01-25 16:02 ` Tetsuo Handa
2019-01-28 16:45 ` Joel Fernandes
2019-01-29 10:44 ` Tetsuo Handa
2019-01-26 1:57 ` Tetsuo Handa
2019-01-26 1:57 ` Tetsuo Handa
2018-10-01 5:23 ` syzbot
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