WARNING in get_probe_ref

Status: upstream: reported C repro on 2020/05/18 03:12
Subsystems: block trace
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+8672dcb9d10011c0a160@syzkaller.appspotmail.com
First crash: 2376d, last: 2d00h
Cause bisection: introduced by (bisect log) [merge commit]:
commit 27d6e47f8e133167af51a3e39548cd3e9bed07da
Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Mon Oct 14 05:07:36 2019 +0000

  Merge 5.4-rc3 into staging-next

Crash: WARNING in get_probe_ref (log)
Repro: C syz .config
  
Fix bisection: failed (error log, bisect log)
  
▶ ▼ ✨ AI Patch Versions (1)
Version Stage Reported Report Link Job
1 moderation 2026/05/19 09:46 Discussion 1da237ef-86bc-4b27-8e1c-efa09d2b8eb4
▶ ▼ ✨ AI Jobs (3)
ID Workflow Result Correct Bug Created Started Finished Revision
69cf93f6 patching 💥 WARNING in get_probe_ref 2026/11/04 18:17 2026/11/04 19:00 2026/11/04 19:30 73438ed0
1da237ef patching ❓ WARNING in get_probe_ref 2026/05/19 06:54 2026/05/19 06:58 2026/05/19 09:46 9f74d399
0efdfd50 assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ✅ WARNING in get_probe_ref 2026/05/08 15:53 2026/05/08 15:53 2026/05/08 16:03 b8bcbc42
▶ ▼ Discussions (19)
Title Replies (including bot) Last reply
[syzbot] Monthly trace report (Mar 2026) 0 (1) 2026/03/26 12:34
[syzbot] Monthly trace report (Jan 2026) 0 (1) 2026/01/22 21:23
[syzbot] Monthly trace report (Dec 2025) 0 (1) 2025/12/22 13:07
[syzbot] Monthly trace report (Nov 2025) 0 (1) 2025/11/21 12:34
[syzbot] Monthly trace report (Jun 2025) 0 (1) 2025/06/18 13:02
[syzbot] Monthly trace report (Apr 2025) 0 (1) 2025/04/17 08:38
[syzbot] Monthly trace report (Mar 2025) 0 (1) 2025/03/16 22:21
[syzbot] Monthly trace report (Feb 2025) 0 (1) 2025/02/13 12:34
[syzbot] Monthly trace report (Jan 2025) 0 (1) 2025/01/13 12:41
[syzbot] Monthly trace report (Oct 2024) 4 (5) 2024/10/15 14:05
[syzbot] Monthly trace report (Sep 2024) 2 (3) 2024/09/10 00:22
[syzbot] Monthly trace report (Aug 2024) 0 (1) 2024/08/06 20:42
[syzbot] Monthly block report (Jul 2024) 0 (1) 2024/07/15 11:51
[syzbot] Monthly trace report (May 2024) 3 (4) 2024/06/02 21:06
[syzbot] Monthly trace report (Apr 2024) 0 (1) 2024/04/30 07:11
[syzbot] Monthly block report (Mar 2024) 0 (1) 2024/03/12 09:29
[syzbot] Monthly trace report (Jan 2024) 0 (1) 2024/01/26 21:55
[syzbot] Monthly trace report (Nov 2023) 0 (1) 2023/11/23 13:12
WARNING in get_probe_ref 0 (1) 2020/05/18 03:12
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in get_probe_ref origin:upstream -1 syz 9 68d 72d 0/3 upstream: reported syz repro on 2026/09/03 15:58
linux-6.6 WARNING in get_probe_ref origin:upstream -1 syz 3 18d 72d 0/2 upstream: reported syz repro on 2026/09/03 17:29
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/09/02 15:27 14m retest repro upstream error job log
2026/07/27 14:54 23m retest repro upstream error
2026/06/17 21:55 25m retest repro upstream error
2026/05/18 14:00 21m retest repro upstream error
2026/04/08 21:02 17m retest repro upstream error
2026/02/28 04:48 14m retest repro upstream report log
2026/01/21 15:23 14m retest repro upstream report log
2025/12/20 04:28 14m retest repro upstream report log
2025/11/12 14:43 14m retest repro upstream report log
2025/09/03 14:12 13m retest repro upstream report log
▶ ▼ Fix bisection attempts (5)
Created Duration User Patch Repo Result
2020/11/07 06:09 16m bisect fix upstream error job log
2020/10/08 04:08 33m bisect fix upstream OK (0) job log log
2020/09/01 16:41 33m bisect fix upstream OK (0) job log log
2020/08/02 08:54 33m bisect fix upstream OK (0) job log log
2020/06/13 04:34 32m (6) bisect fix upstream OK (0) job log log

Sample crash report:
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007facdcfe5fa0 R14: 00007facdcfe5fa0 R15: 0000000000000003
 </TASK>
------------[ cut here ]------------
WARNING: kernel/trace/blktrace.c:1357 at blk_register_tracepoints kernel/trace/blktrace.c:1357 [inline], CPU#0: syz.0.18/5484
WARNING: kernel/trace/blktrace.c:1357 at get_probe_ref+0x41f/0x470 kernel/trace/blktrace.c:493, CPU#0: syz.0.18/5484
Modules linked in:
CPU: 0 UID: 0 PID: 5484 Comm: syz.0.18 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:blk_register_tracepoints kernel/trace/blktrace.c:1357 [inline]
RIP: 0010:get_probe_ref+0x41f/0x470 kernel/trace/blktrace.c:493
Code: 0f 0b 90 e9 ff fd ff ff e8 4e a2 f7 ff 90 0f 0b 90 e9 1e fe ff ff e8 40 a2 f7 ff 90 0f 0b 90 e9 3d fe ff ff e8 32 a2 f7 ff 90 <0f> 0b 90 e9 5c fe ff ff e8 24 a2 f7 ff 90 0f 0b 90 e9 7b fe ff ff
RSP: 0018:ffffc90002a8fa90 EFLAGS: 00010293
RAX: ffffffff81c9b8ee RBX: 00000000fffffff4 RCX: ffff888036e40000
RDX: 0000000000000000 RSI: 00000000fffffff4 RDI: 0000000000000000
RBP: ffffc90002a8fdd0 R08: ffffc90002a8f9c7 R09: 1ffff92000551f38
R10: dffffc0000000000 R11: fffff52000551f39 R12: ffffc90002a8fc40
R13: ffffc90002a8fd40 R14: ffff888034c4d4b8 R15: 1ffff92000551f58
FS:  000055557fd08500(0000) GS:ffff88808d683000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c000093d20 CR3: 0000000011e62000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 blk_trace_setup2 kernel/trace/blktrace.c:829 [inline]
 blk_trace_ioctl+0x626/0x6e0 kernel/trace/blktrace.c:931
 blkdev_ioctl+0x4a2/0x710 block/ioctl.c:696
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7facdcd8f7c9
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:00007ffea5cb5c28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007facdcfe5fa0 RCX: 00007facdcd8f7c9
RDX: 0000200000000240 RSI: 00000000c0c0128e RDI: 0000000000000003
RBP: 00007ffea5cb5c80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007facdcfe5fa0 R14: 00007facdcfe5fa0 R15: 0000000000000003
 </TASK>

Crashes (145):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/12/06 03:46 upstream d1d36025a617 d1b870e1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2025/06/05 18:25 upstream ec7714e49479 6b6b5f21 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2026/11/13 03:47 upstream 7e1392a42ea2 26b2fee0 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro #1 (clean fs)] [mounted in repro #2 (corrupt fs)] ci-snapshot-upstream-root WARNING in get_probe_ref
2020/05/14 03:47 upstream 24085f70a6e1 a885920d .config console log report syz C ci-upstream-kasan-gce
2026/10/17 12:57 upstream 70dd4ee72eb2 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2026/10/05 20:11 upstream 67f0943b394d 1995e6c7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2026/10/05 13:08 upstream a90ee4305c4a 1995e6c7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2026/10/02 00:15 upstream d24e8ac715de 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2026/10/01 19:26 upstream d24e8ac715de 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2026/10/01 19:25 upstream d24e8ac715de 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2026/09/28 09:11 upstream 72d3fcf802c4 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2026/09/25 16:50 upstream 165768bb7026 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2026/09/19 00:20 upstream c3d85c669d09 8d7d05f1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in get_probe_ref
2026/09/12 23:57 upstream cba2348ab114 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in get_probe_ref
2026/09/06 14:24 upstream 1fc5a74b108f 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2026/09/05 08:43 upstream 654ae5d73c05 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2026/09/04 07:02 upstream 841e384b841a 801f0966 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2026/09/04 02:43 upstream 841e384b841a 801f0966 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2026/09/03 13:48 upstream 940de590b839 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2026/09/03 13:48 upstream 940de590b839 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2026/09/03 13:48 upstream 940de590b839 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2026/09/03 13:48 upstream 940de590b839 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2026/09/03 11:03 upstream 940de590b839 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in get_probe_ref
2026/09/03 10:59 upstream 940de590b839 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in get_probe_ref
2026/09/03 10:58 upstream 940de590b839 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in get_probe_ref
2026/09/03 05:03 upstream 940de590b839 85995287 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2026/09/03 05:03 upstream 940de590b839 85995287 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in get_probe_ref
2024/09/04 01:58 upstream 88fac17500f4 9d47f20a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in get_probe_ref
2024/02/27 13:09 upstream 45ec2f5f6ed3 05e69c83 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in get_probe_ref
2023/06/26 01:40 upstream 547cc9be86f4 09ffe269 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in get_probe_ref
2022/06/25 16:37 upstream 6a0a17e6c6d1 a371c43c .config strace log report syz C ci-upstream-kasan-gce-smack-root WARNING in get_probe_ref
2024/11/09 10:43 upstream 50643bbc9eb6 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in get_probe_ref
2026/11/13 02:03 upstream 7e1392a42ea2 26b2fee0 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2026/11/13 01:58 upstream 7e1392a42ea2 26b2fee0 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2026/11/13 01:57 upstream 7e1392a42ea2 26b2fee0 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2026/11/11 17:22 upstream 067c5c24cef2 e56a968c .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2026/11/09 16:26 upstream 7475ea8b5861 5cecaf1f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2026/11/08 06:08 upstream d164c7d754f0 5cecaf1f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2026/11/06 15:03 upstream f66469d9905b 5cecaf1f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2026/11/06 13:59 upstream f66469d9905b 5cecaf1f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2026/11/06 11:14 upstream d68ce4e71248 5cecaf1f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2026/11/06 08:46 upstream d68ce4e71248 5cecaf1f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2026/11/05 21:08 upstream 05441d697f7f 5cecaf1f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2026/11/05 21:05 upstream 05441d697f7f 5cecaf1f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2026/11/05 16:19 upstream 05441d697f7f 5cecaf1f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2026/10/30 04:41 upstream 4dd16e31135e b498adee .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2026/10/28 04:58 upstream 62c457528529 96923c60 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2026/10/13 21:45 upstream 24a19b953e2a 7321cd29 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2024/08/15 10:03 upstream d07b43284ab3 e4bacdaf .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in get_probe_ref
2026/11/08 20:13 linux-next ddfe51b0a0f5 5cecaf1f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in get_probe_ref
2026/11/01 06:21 linux-next 7649ba73f9e7 25a0ae84 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in get_probe_ref
2026/10/20 00:00 linux-next 3d229ce89862 72cdc28d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in get_probe_ref
2026/10/01 01:58 linux-next 6474fa070f2b 892a21ec .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in get_probe_ref
2026/09/26 01:25 linux-next f5f84daefcd9 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in get_probe_ref
2026/09/12 08:21 linux-next 9d80aa4617b3 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in get_probe_ref
2026/09/03 12:39 linux-next 32b6ef9a5d0e 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in get_probe_ref
2020/05/14 03:03 upstream 24085f70a6e1 a885920d .config console log report ci-upstream-kasan-gce
* Struck through repros no longer work on HEAD.