syzbot


BUG: unable to handle kernel paging request in __lock_acquire

Status: closed as invalid on 2018/02/01 07:26
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+b662152b723ded28b7458da9822acc374eed1e8e@syzkaller.appspotmail.com
First crash: 2597d, last: 2597d

Sample crash report:
audit: type=1400 audit(1513653496.149:7): avc:  denied  { map } for  pid=3121 comm="syzkaller331655" path="/root/syzkaller331655803" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
BUG: unable to handle kernel paging request at 0000000100000137
IP: __lock_acquire+0xd8/0x1430 kernel/locking/lockdep.c:3315
PGD 0 P4D 0 
Oops: 0002 [#1] SMP
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 3131 Comm: syzkaller331655 Not tainted 4.15.0-rc3-next-20171214+ #67
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0xd8/0x1430 kernel/locking/lockdep.c:3315
RSP: 0018:ffffc9000190bb90 EFLAGS: 00010006
RAX: 00000000ffffffff RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8802143518b8
RBP: ffffc9000190bc60 R08: 0000000000000001 R09: ffffffff8121b4f4
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff880213514240 R14: 0000000000000001 R15: ffff8802143518b8
FS:  000000000149c880(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000137 CR3: 000000000301e003 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire+0xbf/0x220 kernel/locking/lockdep.c:3914
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x56/0x70 kernel/locking/spinlock.c:152
 remove_wait_queue+0x14/0x60 kernel/sched/wait.c:50
 ep_remove_wait_queue fs/eventpoll.c:595 [inline]
 ep_unregister_pollwait.isra.7+0x79/0x1f0 fs/eventpoll.c:613
 ep_remove+0x22/0x180 fs/eventpoll.c:776
 eventpoll_release_file+0x63/0xa0 fs/eventpoll.c:1001
 eventpoll_release include/linux/eventpoll.h:66 [inline]
 __fput+0x232/0x270 fs/file_table.c:200
 ____fput+0x15/0x20 fs/file_table.c:243
 task_work_run+0xa3/0xe0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x3e6/0x1050 kernel/exit.c:869
 do_group_exit+0x60/0x100 kernel/exit.c:972
 SYSC_exit_group kernel/exit.c:983 [inline]
 SyS_exit_group+0x18/0x20 kernel/exit.c:981
 entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x4444f9
RSP: 002b:00007ffee7715938 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004444f9
RDX: 00000000004444f9 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000006cf018 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000401e00 R14: 0000000000000000 R15: 0000000000000000
Code: ff ff e8 6c db ff ff 48 85 c0 4c 8b 8d 60 ff ff ff 44 8b 9d 48 ff ff ff 44 8b 95 40 ff ff ff 8b 8d 3c ff ff ff 0f 84 6d 03 00 00 <f0> ff 80 38 01 00 00 8b 1d 33 4e d4 02 45 8b 85 68 08 00 00 85 
RIP: __lock_acquire+0xd8/0x1430 kernel/locking/lockdep.c:3315 RSP: ffffc9000190bb90
CR2: 0000000100000137
---[ end trace 43b4a0602d494b9e ]---

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2017/12/19 03:20 linux-next 6084b576dca2 1c4160ef .config console log report syz C ci-upstream-next-kasan-gce
2017/12/19 03:08 linux-next 6084b576dca2 1c4160ef .config console log report ci-upstream-next-kasan-gce
* Struck through repros no longer work on HEAD.