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MIME-Version: 1.0
Date:   Thu, 28 Nov 2019 00:35:07 -0800
Message-ID: <0000000000009f46d4059863fdea@google.com>
Subject: INFO: trying to register non-static key in io_cqring_overflow_flush
From:   syzbot <syzbot+be9e13497969768c0e6e@syzkaller.appspotmail.com>
To:     axboe@kernel.dk, io-uring@vger.kernel.org,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk
Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hello,

syzbot found the following crash on:

HEAD commit:    d7688697 Merge tag 'for-linus' of git://git.kernel.org/pub..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=145e5fcee00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=12f2051e3d8cdb3f
dashboard link: https://syzkaller.appspot.com/bug?extid=be9e13497969768c0e6e
compiler:       clang version 9.0.0 (/home/glider/llvm/clang  
80fee25776c2fb61e74c1ecb1a523375c2500b69)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=146c517ae00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16550b12e00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+be9e13497969768c0e6e@syzkaller.appspotmail.com

RSP: 002b:00007ffc426dee68 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441259
RDX: 0000000000000002 RSI: 00000000200005c0 RDI: 0000000000000df3
RBP: 00007ffc426dee80 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 0 PID: 7968 Comm: syz-executor745 Not tainted 5.4.0-syzkaller #0
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+0x1fb/0x318 lib/dump_stack.c:118
  register_lock_class+0x6ec/0xea0 kernel/locking/lockdep.c:443
  __lock_acquire+0x116/0x1be0 kernel/locking/lockdep.c:3837
  lock_acquire+0x158/0x250 kernel/locking/lockdep.c:4485
  __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
  _raw_spin_lock_irqsave+0xa1/0xc0 kernel/locking/spinlock.c:159
  __wake_up_common_lock kernel/sched/wait.c:122 [inline]
  __wake_up+0xb8/0x150 kernel/sched/wait.c:142
  io_cqring_ev_posted fs/io_uring.c:637 [inline]
  io_cqring_overflow_flush+0x7bc/0xa80 fs/io_uring.c:684
  io_ring_ctx_wait_and_kill+0x4c6/0xb10 fs/io_uring.c:4344
  io_uring_create fs/io_uring.c:4681 [inline]
  io_uring_setup fs/io_uring.c:4707 [inline]
  __do_sys_io_uring_setup fs/io_uring.c:4720 [inline]
  __se_sys_io_uring_setup+0x1ccb/0x2490 fs/io_uring.c:4717
  __x64_sys_io_uring_setup+0x5b/0x70 fs/io_uring.c:4717
  do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
  entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441259
Code: e8 5c ae 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 bb 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc426dee68 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441259
RDX: 0000000000000002 RSI: 00000000200005c0 RDI: 0000000000000df3
RBP: 00007ffc426dee80 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 7968 Comm: syz-executor745 Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS  
Google 01/01/2011
RIP: 0010:__wake_up_common+0x2bf/0x4d0 kernel/sched/wait.c:87
Code: e8 d6 91 57 00 48 ba 00 00 00 00 00 fc ff df eb 43 66 2e 0f 1f 84 00  
00 00 00 00 4c 89 e3 4d 8d 74 24 e8 4c 89 e0 48 c1 e8 03 <80> 3c 10 00 74  
12 48 89 df e8 c3 91 57 00 48 ba 00 00 00 00 00 fc
RSP: 0018:ffff8880915afb78 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff888093164120
RBP: ffff8880915afbd0 R08: 0000000000000000 R09: ffff8880915afbe8
R10: ffffed10122b5f6f R11: 0000000000000000 R12: 0000000000000000
R13: ffff888093164158 R14: ffffffffffffffe8 R15: ffff8880915afbe8
FS:  0000000001aed880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200005c0 CR3: 000000009328e000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
  __wake_up_common_lock kernel/sched/wait.c:123 [inline]
  __wake_up+0xd3/0x150 kernel/sched/wait.c:142
  io_cqring_ev_posted fs/io_uring.c:637 [inline]
  io_cqring_overflow_flush+0x7bc/0xa80 fs/io_uring.c:684
  io_ring_ctx_wait_and_kill+0x4c6/0xb10 fs/io_uring.c:4344
  io_uring_create fs/io_uring.c:4681 [inline]
  io_uring_setup fs/io_uring.c:4707 [inline]
  __do_sys_io_uring_setup fs/io_uring.c:4720 [inline]
  __se_sys_io_uring_setup+0x1ccb/0x2490 fs/io_uring.c:4717
  __x64_sys_io_uring_setup+0x5b/0x70 fs/io_uring.c:4717
  do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
  entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441259
Code: e8 5c ae 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 bb 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc426dee68 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441259
RDX: 0000000000000002 RSI: 00000000200005c0 RDI: 0000000000000df3
RBP: 00007ffc426dee80 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace d0de30dce4e623c2 ]---
RIP: 0010:__wake_up_common+0x2bf/0x4d0 kernel/sched/wait.c:87
Code: e8 d6 91 57 00 48 ba 00 00 00 00 00 fc ff df eb 43 66 2e 0f 1f 84 00  
00 00 00 00 4c 89 e3 4d 8d 74 24 e8 4c 89 e0 48 c1 e8 03 <80> 3c 10 00 74  
12 48 89 df e8 c3 91 57 00 48 ba 00 00 00 00 00 fc
RSP: 0018:ffff8880915afb78 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff888093164120
RBP: ffff8880915afbd0 R08: 0000000000000000 R09: ffff8880915afbe8
R10: ffffed10122b5f6f R11: 0000000000000000 R12: 0000000000000000
R13: ffff888093164158 R14: ffffffffffffffe8 R15: ffff8880915afbe8
FS:  0000000001aed880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200005c0 CR3: 000000009328e000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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