[v6.1] WARNING in get_probe_ref

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: cf82dcca9634 Linux 6.1.187
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=130b50f9580000
kernel config: https://syzkaller.appspot.com/x/.config?x=31dfefc4a14efea3
dashboard link: https://syzkaller.appspot.com/bug?extid=8a684192ee5142232560
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/97e1e40b968b/disk-cf82dcca.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/cfec27562c15/vmlinux-cf82dcca.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4c7cd066c46d/bzImage-cf82dcca.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8a6841...@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 5590 at kernel/trace/blktrace.c:1110 blk_register_tracepoints kernel/trace/blktrace.c:1110 [inline]
WARNING: CPU: 0 PID: 5590 at kernel/trace/blktrace.c:1110 get_probe_ref+0x358/0x3e0 kernel/trace/blktrace.c:337
Modules linked in:
CPU: 0 PID: 5590 Comm: syz.1.374 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:blk_register_tracepoints kernel/trace/blktrace.c:1110 [inline]
RIP: 0010:get_probe_ref+0x358/0x3e0 kernel/trace/blktrace.c:337
Code: ff e8 8c 27 f9 ff 0f 0b e9 86 fd ff ff e8 80 27 f9 ff 0f 0b e9 a7 fd ff ff e8 74 27 f9 ff 0f 0b e9 c8 fd ff ff e8 68 27 f9 ff <0f> 0b e9 e9 fd ff ff e8 5c 27 f9 ff 0f 0b e9 0a fe ff ff e8 50 27
RSP: 0018:ffffc900037cfb88 EFLAGS: 00010283
RAX: ffffffff81891a28 RBX: 00000000fffffff4 RCX: 0000000000080000
RDX: ffffc90006059000 RSI: 0000000000061372 RDI: 0000000000061373
RBP: 1ffff11004ed7db6 R08: ffffc900037cfac7 R09: 1ffff920006f9f58
R10: dffffc0000000000 R11: fffff520006f9f59 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880276bed80
FS: 00007fec6843d6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5dc19556c8 CR3: 000000002873f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
do_blk_trace_setup+0x7fb/0x9e0 kernel/trace/blktrace.c:612
__blk_trace_setup kernel/trace/blktrace.c:631 [inline]
blk_trace_ioctl+0x3f8/0x580 kernel/trace/blktrace.c:745
blkdev_ioctl+0x1b2/0x740 block/ioctl.c:615
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fec6759e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fec6843d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fec67825fa0 RCX: 00007fec6759e159
RDX: 0000200000000440 RSI: 00000000c0481273 RDI: 0000000000000003
RBP: 00007fec67635024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fec67826038 R14: 00007fec67825fa0 R15: 00007ffdbcb0d858
</TASK>


---
This report is generated by a bot. It may contain errors.
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If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want to overwrite report's subsystems, reply with:
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(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 8b73de7da85f Linux 6.6.156
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=13ab4b49580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7be9809cedd6b69c
dashboard link: https://syzkaller.appspot.com/bug?extid=594f82cdeec3292cdc9a

compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:

disk image: https://storage.googleapis.com/syzbot-assets/d7e87682fef0/disk-8b73de7d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/096830afc063/vmlinux-8b73de7d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/89c175e4560d/bzImage-8b73de7d.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:

Reported-by: syzbot+594f82...@syzkaller.appspotmail.com

R13: 00007f9e09226038 R14: 00007f9e09225fa0 R15: 00007ffd23521e18
</TASK>
------------[ cut here ]------------
WARNING: CPU: 0 PID: 9494 at kernel/trace/blktrace.c:1108 blk_register_tracepoints kernel/trace/blktrace.c:1108 [inline]
WARNING: CPU: 0 PID: 9494 at kernel/trace/blktrace.c:1108 get_probe_ref+0x364/0x3e0 kernel/trace/blktrace.c:337
Modules linked in:
CPU: 0 PID: 9494 Comm: syz.5.845 Not tainted syzkaller #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026

RIP: 0010:blk_register_tracepoints kernel/trace/blktrace.c:1108 [inline]
RIP: 0010:get_probe_ref+0x364/0x3e0 kernel/trace/blktrace.c:337
Code: ff e8 70 22 f9 ff 0f 0b e9 a7 fd ff ff e8 64 22 f9 ff 0f 0b e9 c8 fd ff ff e8 58 22 f9 ff 0f 0b e9 e9 fd ff ff e8 4c 22 f9 ff <0f> 0b e9 0a fe ff ff e8 40 22 f9 ff 0f 0b e9 2b fe ff ff e8 34 22
RSP: 0018:ffffc900037b7b88 EFLAGS: 00010283
RAX: ffffffff818e6024 RBX: 00000000fffffff4 RCX: 0000000000080000
RDX: ffffc90015824000 RSI: 000000000006fbd2 RDI: 000000000006fbd3
RBP: 1ffff11004709166 R08: ffffc900037b7ac7 R09: 1ffff920006f6f58
R10: dffffc0000000000 R11: fffff520006f6f59 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888023848b00
FS: 00007f9e09e0b6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000

CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 000000110c3771c1 CR3: 000000005c90b000 CR4: 00000000003506f0
Call Trace:
<TASK>
do_blk_trace_setup+0x7f8/0x9e0 kernel/trace/blktrace.c:612
__blk_trace_setup kernel/trace/blktrace.c:631 [inline]
blk_trace_ioctl+0x3e2/0x560 kernel/trace/blktrace.c:741
blkdev_ioctl+0x44b/0x730 block/ioctl.c:628
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f9e08f9e159

Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48

RSP: 002b:00007f9e09e0b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9e09225fa0 RCX: 00007f9e08f9e159

RDX: 0000200000000440 RSI: 00000000c0481273 RDI: 0000000000000003

RBP: 00007f9e09035024 R08: 0000000000000000 R09: 0000000000000000

R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000

R13: 00007f9e09226038 R14: 00007f9e09225fa0 R15: 00007ffd23521e18

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit: 8b73de7da85f Linux 6.6.156
git tree: linux-6.6.y

console output: https://syzkaller.appspot.com/x/log.txt?x=12a29cf9580000

kernel config: https://syzkaller.appspot.com/x/.config?x=7be9809cedd6b69c
dashboard link: https://syzkaller.appspot.com/bug?extid=594f82cdeec3292cdc9a
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14a49125580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d7e87682fef0/disk-8b73de7d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/096830afc063/vmlinux-8b73de7d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/89c175e4560d/bzImage-8b73de7d.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+594f82...@syzkaller.appspotmail.com

RBP: 00007f6808235024 R08: 0000000000000000 R09: 0000000000000000

R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000

R13: 00007f6808425fac R14: 00007f6808425fa0 R15: 00007f6808425fa0

</TASK>
------------[ cut here ]------------

WARNING: CPU: 0 PID: 5938 at kernel/trace/blktrace.c:1104 blk_register_tracepoints kernel/trace/blktrace.c:1104 [inline]
WARNING: CPU: 0 PID: 5938 at kernel/trace/blktrace.c:1104 get_probe_ref+0x34c/0x3e0 kernel/trace/blktrace.c:337
Modules linked in:
CPU: 0 PID: 5938 Comm: syz.0.18 Not tainted syzkaller #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026

RIP: 0010:blk_register_tracepoints kernel/trace/blktrace.c:1104 [inline]
RIP: 0010:get_probe_ref+0x34c/0x3e0 kernel/trace/blktrace.c:337
Code: ff e8 88 22 f9 ff 0f 0b e9 65 fd ff ff e8 7c 22 f9 ff 0f 0b e9 86 fd ff ff e8 70 22 f9 ff 0f 0b e9 a7 fd ff ff e8 64 22 f9 ff <0f> 0b e9 c8 fd ff ff e8 58 22 f9 ff 0f 0b e9 e9 fd ff ff e8 4c 22
RSP: 0018:ffffc900032d7b88 EFLAGS: 00010293
RAX: ffffffff818e600c RBX: 00000000fffffff4 RCX: ffff88802d571e00
RDX: 0000000000000000 RSI: 00000000fffffff4 RDI: 0000000000000000
RBP: 1ffff1100ed1e506 R08: ffffc900032d7ac7 R09: 1ffff9200065af58
R10: dffffc0000000000 R11: fffff5200065af59 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880768f2800
FS: 0000555589c2b500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000

CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 0000200000003ac0 CR3: 0000000076869000 CR4: 00000000003506f0

Call Trace:
<TASK>
do_blk_trace_setup+0x7f8/0x9e0 kernel/trace/blktrace.c:612
__blk_trace_setup kernel/trace/blktrace.c:631 [inline]
blk_trace_ioctl+0x3e2/0x560 kernel/trace/blktrace.c:741
blkdev_ioctl+0x44b/0x730 block/ioctl.c:628
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2

RIP: 0033:0x7f680819e159

Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48

RSP: 002b:00007ffdc5afb8f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6808425fa0 RCX: 00007f680819e159
RDX: 0000200000000440 RSI: 00000000c0481273 RDI: 0000000000000005
RBP: 00007f6808235024 R08: 0000000000000000 R09: 0000000000000000

R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000

R13: 00007f6808425fac R14: 00007f6808425fa0 R15: 00007f6808425fa0
</TASK>


---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit: cf82dcca9634 Linux 6.1.187
git tree: linux-6.1.y

console output: https://syzkaller.appspot.com/x/log.txt?x=14767cf9580000

kernel config: https://syzkaller.appspot.com/x/.config?x=31dfefc4a14efea3
dashboard link: https://syzkaller.appspot.com/bug?extid=8a684192ee5142232560
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10c18cf9580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/97e1e40b968b/disk-cf82dcca.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/cfec27562c15/vmlinux-cf82dcca.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4c7cd066c46d/bzImage-cf82dcca.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8a6841...@syzkaller.appspotmail.com

RBP: 00007fc860035024 R08: 0000000000000000 R09: 0000000000000000

R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000

R13: 00007fc860225fac R14: 00007fc860225fa0 R15: 00007fc860225fa0
</TASK>
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4439 at kernel/trace/blktrace.c:1112 blk_register_tracepoints kernel/trace/blktrace.c:1112 [inline]
WARNING: CPU: 0 PID: 4439 at kernel/trace/blktrace.c:1112 get_probe_ref+0x364/0x3e0 kernel/trace/blktrace.c:337
Modules linked in:
CPU: 0 PID: 4439 Comm: syz.3.22 Not tainted syzkaller #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026

RIP: 0010:blk_register_tracepoints kernel/trace/blktrace.c:1112 [inline]
RIP: 0010:get_probe_ref+0x364/0x3e0 kernel/trace/blktrace.c:337
Code: ff e8 80 27 f9 ff 0f 0b e9 a7 fd ff ff e8 74 27 f9 ff 0f 0b e9 c8 fd ff ff e8 68 27 f9 ff 0f 0b e9 e9 fd ff ff e8 5c 27 f9 ff <0f> 0b e9 0a fe ff ff e8 50 27 f9 ff 0f 0b e9 2b fe ff ff e8 44 27
RSP: 0018:ffffc900034f7b88 EFLAGS: 00010293
RAX: ffffffff81891a34 RBX: 00000000fffffff4 RCX: ffff88807b040000

RDX: 0000000000000000 RSI: 00000000fffffff4 RDI: 0000000000000000

RBP: 1ffff1100f0503b6 R08: ffffc900034f7ac7 R09: 1ffff9200069ef58
R10: dffffc0000000000 R11: fffff5200069ef59 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888078281d80
FS: 0000555592df3500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000

CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 00007eff865df000 CR3: 000000001db8c000 CR4: 00000000003506f0

DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
do_blk_trace_setup+0x7fb/0x9e0 kernel/trace/blktrace.c:612
__blk_trace_setup kernel/trace/blktrace.c:631 [inline]
blk_trace_ioctl+0x3f8/0x580 kernel/trace/blktrace.c:745
blkdev_ioctl+0x1b2/0x740 block/ioctl.c:615
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2

RIP: 0033:0x7fc85ff9e159

Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48

RSP: 002b:00007ffc587f1b48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc860225fa0 RCX: 00007fc85ff9e159
RDX: 0000200000000440 RSI: 00000000c0481273 RDI: 0000000000000005
RBP: 00007fc860035024 R08: 0000000000000000 R09: 0000000000000000

R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000

R13: 00007fc860225fac R14: 00007fc860225fa0 R15: 00007fc860225fa0