syzbot


WARNING in call_rcu

Status: auto-obsoleted due to no activity on 2023/11/16 11:10
Reported-by: syzbot+534336e578b5a01a41f4@syzkaller.appspotmail.com
First crash: 500d, last: 470d
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in call_rcu (2) xfs C 15 685d 692d 0/28 auto-obsoleted due to no activity on 2023/04/15 15:13
linux-5.15 WARNING in call_rcu (2) 1 318d 316d 0/3 auto-obsoleted due to no activity on 2024/04/17 03:03
upstream WARNING in call_rcu net C done 8 1709d 1716d 15/28 fixed on 2020/05/10 10:41
upstream WARNING in call_rcu (3) net C 3 236d 338d 0/28 upstream: reported C repro on 2023/12/18 14:45

Sample crash report:
WARNING: CPU: 0 PID: 2963 at lib/debugobjects.c:511 debug_print_object lib/debugobjects.c:508 [inline]
WARNING: CPU: 0 PID: 2963 at lib/debugobjects.c:511 debug_object_active_state+0x287/0x410 lib/debugobjects.c:965
Modules linked in:
CPU: 0 PID: 2963 Comm: udevd Not tainted 5.15.124-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
RIP: 0010:debug_print_object lib/debugobjects.c:508 [inline]
RIP: 0010:debug_object_active_state+0x287/0x410 lib/debugobjects.c:965
Code: 89 ef e8 7c 45 be fd 4c 8b 45 00 48 c7 c7 00 75 d8 8a 48 c7 c6 60 72 d8 8a 48 c7 c2 a0 76 d8 8a 31 c9 49 89 d9 e8 49 97 40 fd <0f> 0b e9 9f 00 00 00 45 31 f6 ff 05 79 6d 62 0d 43 0f b6 04 2f 84
RSP: 0018:ffffc90002c4fd00 EFLAGS: 00010246
RAX: 55a86ec8ab6bc300 RBX: 0000000000000000 RCX: ffff88807d485940
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffffff8a8c0640 R08: ffffffff816649cc R09: ffffed1017344f24
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff888077019900
FS:  00007fc67db5fc80(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fee7e280038 CR3: 0000000022420000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 debug_rcu_head_queue kernel/rcu/rcu.h:177 [inline]
 __call_rcu kernel/rcu/tree.c:2978 [inline]
 call_rcu+0xb1/0xa70 kernel/rcu/tree.c:3074
 task_work_run+0x129/0x1a0 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fc67dc8e37f
Code: af 6a 0d 00 f7 d8 64 89 02 48 83 c8 ff 44 89 c7 48 89 04 24 e8 e1 fc f9 ff 48 8b 04 24 48 83 c4 28 c3 c3 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 10 48 8b 15 7a 6a 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffc4b68cce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 000055722d94c2c0 RCX: 00007fc67dc8e37f
RDX: 00007fc67dd65b00 RSI: 000055722d94b010 RDI: 000000000000000f
RBP: 000055722d98b2f0 R08: 0000000000000000 R09: 0000000001000000
R10: 0000000000000812 R11: 0000000000000206 R12: 000055722d956fa0
R13: 00000000000000fd R14: 000055722cd941c4 R15: 0000000000000000
 </TASK>

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/08/08 11:09 linux-5.15.y 38d4ca22a528 9552ae77 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in call_rcu
2023/07/11 04:33 linux-5.15.y d54cfc420586 52ae002a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in call_rcu
2023/07/09 17:01 linux-5.15.y d54cfc420586 668cb1fa .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in call_rcu
* Struck through repros no longer work on HEAD.