syzbot


WARNING in call_rcu (2)

Status: auto-obsoleted due to no activity on 2024/04/17 03:03
Reported-by: syzbot+d24c850070b319a318dc@syzkaller.appspotmail.com
First crash: 334d, last: 334d
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in call_rcu (2) xfs C 15 701d 708d 0/28 auto-obsoleted due to no activity on 2023/04/15 15:13
linux-5.15 WARNING in call_rcu 3 486d 516d 0/3 auto-obsoleted due to no activity on 2023/11/16 11:10
upstream WARNING in call_rcu net C done 8 1725d 1732d 15/28 fixed on 2020/05/10 10:41
upstream WARNING in call_rcu (3) net C 3 252d 354d 0/28 upstream: reported C repro on 2023/12/18 14:45

Sample crash report:
------------[ cut here ]------------
ODEBUG: active_state not available (active state 0) object type: rcu_head hint: 0x0
WARNING: CPU: 1 PID: 3540 at lib/debugobjects.c:511 debug_print_object lib/debugobjects.c:508 [inline]
WARNING: CPU: 1 PID: 3540 at lib/debugobjects.c:511 debug_object_active_state+0x287/0x410 lib/debugobjects.c:965
Modules linked in:
CPU: 1 PID: 3540 Comm: syz-executor.0 Not tainted 5.15.146-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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 9c c6 bd fd 4c 8b 45 00 48 c7 c7 c0 86 d8 8a 48 c7 c6 20 84 d8 8a 48 c7 c2 60 88 d8 8a 31 c9 49 89 d9 e8 39 c9 3f fd <0f> 0b e9 9f 00 00 00 45 31 f6 ff 05 19 1d 61 0d 43 0f b6 04 2f 84
RSP: 0018:ffffc90002d87d00 EFLAGS: 00010246
RAX: 20848aa4a1e65700 RBX: 0000000000000000 RCX: ffff88801c271dc0
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffffff8a8c13e0 R08: ffffffff81665dbc R09: ffffed10173667a8
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff88807d828000
FS:  00005555558f0480(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f623f1ec440 CR3: 000000007c58d000 CR4: 00000000003506f0
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:2991 [inline]
 call_rcu+0xb1/0xa70 kernel/rcu/tree.c:3087
 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: 0033:0x7f4169865c1a
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24
RSP: 002b:00007fffa1c2ff30 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f4169865c1a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000050012
R13: 00007fffa1c2ff70 R14: 00007f416a4be690 R15: 00007f416a4be620
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/01/08 03:03 linux-5.15.y 26c690eff0a5 d0304e9c .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.