syzbot


BUG: scheduling while atomic in tracepoint_probe_register_prio_may_exist

Status: upstream: reported C repro on 2024/02/23 08:10
Bug presence: origin:lts
[Documentation on labels]
Reported-by: syzbot+ab599f98e6255ad500e4@syzkaller.appspotmail.com
First crash: 65d, last: 4d02h
Bug presence (2)
Date Name Commit Repro Result
2024/02/23 lts (merge base) 6139f2a02fe0 C [report] BUG: scheduling while atomic in exit_to_user_mode_loop
2024/02/23 upstream (ToT) ffd2cb6b718e C Didn't crash
Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/03/08 08:30 7m retest repro android13-5.15-lts report log
Fix bisection attempts (2)
Created Duration User Patch Repo Result
2024/04/24 05:43 1h45m bisect fix android13-5.15-lts job log (0) log
2024/03/24 09:47 34m bisect fix android13-5.15-lts job log (0) log

Sample crash report:
BUG: scheduling while atomic: syz-executor210/348/0x00000002
Modules linked in:
Preemption disabled at:
[<ffffffff81c22229>] rcu_read_lock_sched include/linux/rcupdate.h:786 [inline]
[<ffffffff81c22229>] fd_install+0x59/0x250 fs/file.c:607
CPU: 1 PID: 348 Comm: syz-executor210 Not tainted 5.15.148-syzkaller-00718-g993bed180178 #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+0x151/0x1b7 lib/dump_stack.c:106
 dump_stack+0x15/0x17 lib/dump_stack.c:113
 __schedule_bug+0x195/0x260 kernel/sched/core.c:5707
 schedule_debug kernel/sched/core.c:5734 [inline]
 __schedule+0xd19/0x1590 kernel/sched/core.c:6402
 schedule+0x11f/0x1e0 kernel/sched/core.c:6595
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6654
 mutex_optimistic_spin kernel/locking/mutex.c:521 [inline]
 __mutex_lock_common kernel/locking/mutex.c:620 [inline]
 __mutex_lock+0x5b5/0x1870 kernel/locking/mutex.c:755
 __mutex_lock_slowpath+0xe/0x10 kernel/locking/mutex.c:1006
 mutex_lock+0x135/0x1e0 kernel/locking/mutex.c:288
 tracepoint_probe_register_prio_may_exist+0xb5/0x180 kernel/tracepoint.c:478
 tracepoint_probe_register_may_exist include/linux/tracepoint.h:52 [inline]
 __bpf_probe_register kernel/trace/bpf_trace.c:1946 [inline]
 bpf_probe_register+0x152/0x1e0 kernel/trace/bpf_trace.c:1952
 bpf_raw_tracepoint_open+0x610/0x950 kernel/bpf/syscall.c:3087
 __sys_bpf+0x489/0x760 kernel/bpf/syscall.c:4669
 __do_sys_bpf kernel/bpf/syscall.c:4731 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4729 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:4729
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7ff998496ee9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffeaca9bf58 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff998496ee9
RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000011
RBP: 0000000000000000 R08: 00000000000000a0 R09: 00000000000000a0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/02/23 08:09 android13-5.15-lts 993bed180178 8d446f15 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 BUG: scheduling while atomic in tracepoint_probe_register_prio_may_exist
* Struck through repros no longer work on HEAD.