syzbot


WARNING in alloc_workqueue

Status: auto-closed as invalid on 2021/11/19 06:51
Subsystems: block
[Documentation on labels]
Reported-by: syzbot+1e80b07ec236d945017f@syzkaller.appspotmail.com
First crash: 1039d, last: 1034d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] WARNING in alloc_workqueue 0 (1) 2021/07/21 06:09

Sample crash report:
RBP: 0000000000000005 R08: 0000000000000000 R09: ffffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 0000000000000004 R14: 0000000020000218 R15: 0000000000000001
------------[ cut here ]------------
WARNING: CPU: 2 PID: 28239 at kernel/locking/lockdep.c:6305 lockdep_unregister_key+0x19a/0x250 kernel/locking/lockdep.c:6305
Modules linked in:
CPU: 2 PID: 28239 Comm: syz-executor.3 Not tainted 5.14.0-rc2-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:lockdep_unregister_key+0x19a/0x250 kernel/locking/lockdep.c:6305
Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 8f 00 00 00 4d 89 7d 08 48 b8 22 01 00 00 00 00 ad de 48 89 43 08 eb 02 <0f> 0b 4c 89 f7 ba 01 00 00 00 48 89 ee e8 44 fd ff ff 4c 89 f7 e8
RSP: 0018:ffffc900050478e0 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffffffff1ad87cd
RDX: 1ffffffff1fcba61 RSI: 0000000000000004 RDI: ffffffff8fe5d308
RBP: ffff88802a2af128 R08: 0000000000000001 R09: 0000000000000003
R10: fffff52000a08f12 R11: 0000000000000001 R12: 0000000000000246
R13: dffffc0000000000 R14: ffffffff8fcd1868 R15: ffff88802a2af020
FS:  00007f19ca48a700(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000970004 CR3: 0000000066b87000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 wq_unregister_lockdep kernel/workqueue.c:3468 [inline]
 alloc_workqueue+0xb31/0xef0 kernel/workqueue.c:4337
 loop_configure+0x4d8/0x1580 drivers/block/loop.c:1199
 lo_ioctl+0x403/0x1600 drivers/block/loop.c:1773
 blkdev_ioctl+0x2a1/0x6d0 block/ioctl.c:585
 block_ioctl+0xf9/0x140 fs/block_dev.c:1602
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:1069 [inline]
 __se_sys_ioctl fs/ioctl.c:1055 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:1055
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4663a7
Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 48 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f19ca489f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004afcc0 RCX: 00000000004663a7
RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000000 R09: ffffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 0000000000000004 R14: 0000000020000218 R15: 0000000000000001

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/07/21 13:28 upstream 8cae8cd89f05 29c3f20f .config console log report info ci-qemu-upstream WARNING in alloc_workqueue
2021/07/18 19:01 upstream 1d67c8d993ba f115ae98 .config console log report info ci-qemu-upstream WARNING in alloc_workqueue
2021/07/22 06:50 upstream 7b6ae471e541 29c3f20f .config console log report info ci-qemu-upstream-386 WARNING in alloc_workqueue
2021/07/22 06:20 upstream 7b6ae471e541 29c3f20f .config console log report info ci-qemu-upstream-386 WARNING in alloc_workqueue
2021/07/18 14:18 upstream 1d67c8d993ba f115ae98 .config console log report info ci-qemu-upstream-386 WARNING in alloc_workqueue
2021/07/18 14:17 upstream 1d67c8d993ba f115ae98 .config console log report info ci-qemu-upstream-386 WARNING in alloc_workqueue
2021/07/17 06:04 upstream d980cc0620ae f115ae98 .config console log report info ci-qemu-upstream-386 WARNING in alloc_workqueue
* Struck through repros no longer work on HEAD.