syzbot


BUG: sleeping function called from invalid context in __dentry_kill

Status: upstream: reported C repro on 2024/02/20 04:05
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+c4e7681de0ea584334bf@syzkaller.appspotmail.com
First crash: 119d, last: 119d
Bug presence (2)
Date Name Commit Repro Result
2024/02/20 linux-6.1.y (ToT) 8b4118fabd6e C [report] BUG: sleeping function called from invalid context in __dentry_kill
2024/02/20 upstream (ToT) b401b621758e C Didn't crash
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2024/03/02 20:25 7h06m fix candidate upstream job log (1)

Sample crash report:
BUG: sleeping function called from invalid context at fs/dcache.c:622
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 10537, name: syz-executor278
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
no locks held by syz-executor278/10537.
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 PID: 10537 Comm: syz-executor278 Not tainted 6.1.78-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 __might_resched+0x5cb/0x780 kernel/sched/core.c:9942
 __dentry_kill+0x52e/0x650 fs/dcache.c:622
 dentry_kill+0xbb/0x290
 dput+0xfb/0x1d0 fs/dcache.c:914
 __fput+0x5e4/0x890 fs/file_table.c:328
 task_work_run+0x246/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f60273c343a
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 f3 84 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 53 85 02 00 8b 44 24
RSP: 002b:00007ffc9d82aee0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f60273c343a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000293 R12: 00007ffc9d82af18
R13: 00007ffc9d82af30 R14: 00007ffc9d82af70 R15: 0000000000001b2c
 </TASK>
BUG: scheduling while atomic: syz-executor278/10537/0x00000002
no locks held by syz-executor278/10537.
Modules linked in:
Preemption disabled at:
[<0000000000000000>] 0x0

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/02/20 04:04 linux-6.1.y 8b4118fabd6e 3af7dd65 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf BUG: sleeping function called from invalid context in __dentry_kill
* Struck through repros no longer work on HEAD.