syzbot


WARNING in tracing_start_tr

Status: upstream: reported on 2025/04/17 00:22
Subsystems: trace
[Documentation on labels]
Reported-by: syzbot+ccdec3bfe0beec58a38d@syzkaller.appspotmail.com
First crash: 34d, last: 23d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [trace?] WARNING in tracing_start_tr 0 (1) 2025/04/17 00:22

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 12953 at kernel/trace/trace.c:2431 tracing_start_tr.part.0+0x1fc/0x2a0 kernel/trace/trace.c:2431
Modules linked in:
CPU: 1 UID: 0 PID: 12953 Comm: syz.3.2466 Not tainted 6.15.0-rc3-syzkaller-00032-ga79be02bba5c #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:tracing_start_tr.part.0+0x1fc/0x2a0 kernel/trace/trace.c:2431
Code: 00 0f 85 97 00 00 00 48 83 3d 6f c5 62 0c 00 74 78 e8 48 56 fb ff 4c 89 ff e8 30 61 b2 09 90 e9 d9 fe ff ff e8 35 56 fb ff 90 <0f> 0b 90 c7 83 94 00 00 00 00 00 00 00 e9 c1 fe ff ff e8 fd d8 5f
RSP: 0018:ffffc9000aacfbe8 EFLAGS: 00010083
RAX: 0000000000022476 RBX: ffffffff8e443240 RCX: ffffc9000be9a000
RDX: 0000000000080000 RSI: ffffffff81bf53bb RDI: 0000000000000005
RBP: 00000000ffffffff R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000000 R12: 1ffff92001559f7e
R13: 0000000000000287 R14: ffffffff8e443320 R15: ffffffff8e443260
FS:  00007f5bd7df66c0(0000) GS:ffff888124abf000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcf921bbd34 CR3: 0000000039544000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 tracing_start_tr kernel/trace/trace.c:9410 [inline]
 buffer_subbuf_size_write+0x226/0x280 kernel/trace/trace.c:9408
 vfs_write+0x25c/0x1180 fs/read_write.c:682
 ksys_write+0x12a/0x240 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5bd9f8e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5bd7df6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f5bda1b5fa0 RCX: 00007f5bd9f8e969
RDX: 000000000000fdef RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f5bda010ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5bda1b5fa0 R15: 00007ffecef221e8
 </TASK>

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/04/23 21:36 upstream a79be02bba5c 9882047a .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in tracing_start_tr
2025/04/13 00:18 upstream 3bde70a2c827 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in tracing_start_tr
* Struck through repros no longer work on HEAD.