[syzbot] [media?] WARNING in az6007_i2c_xfer (3)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 0ce37745d4bf Merge tag 'block-7.2-20260724' of git://git.k..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1405d88e580000
kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782
dashboard link: https://syzkaller.appspot.com/bug?extid=5d7ca36eaac36bd6a34e
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/19521188f055/disk-0ce37745.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2f7922f1fe08/vmlinux-0ce37745.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1a7a0ce66cfa/bzImage-0ce37745.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5d7ca3...@syzkaller.appspotmail.com

usb read operation failed. (-71)
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(__owner_task(owner) != get_current())
WARNING: kernel/locking/mutex.c:1009 at __mutex_unlock_slowpath+0x5dc/0x930 kernel/locking/mutex.c:1009, CPU#0: syz.4.1822/12872
Modules linked in:
CPU: 0 UID: 0 PID: 12872 Comm: syz.4.1822 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:__mutex_unlock_slowpath+0x5e3/0x930 kernel/locking/mutex.c:1009
Code: 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 12 03 00 00 44 8b 1d 90 58 66 05 45 85 db 75 13 48 8d 3d 84 b1 69 05 48 c7 c6 60 cb cf 8b <67> 48 0f b9 3a 90 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea
RSP: 0018:ffffc900037ef9c8 EFLAGS: 00010246
RAX: 0000000000000003 RBX: ffff888037bf0000 RCX: 1ffffffff2245434
RDX: 0000000000000000 RSI: ffffffff8bcfcb60 RDI: ffffffff9125faa0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff920006fdf3f
R13: 0000000000000003 R14: ffffffff9b739600 R15: fffffbfff36e72c0
FS: 00007f3355f9d6c0(0000) GS:ffff888123dde000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f33533f5ff8 CR3: 00000000315a3000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000002
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
az6007_i2c_xfer+0xab0/0xbc0 drivers/media/usb/dvb-usb-v2/az6007.c:827
__i2c_transfer+0x5d9/0x1740 drivers/i2c/i2c-core-base.c:2287
i2c_transfer+0x15f/0x380 drivers/i2c/i2c-core-base.c:2343
i2c_transfer_buffer_flags+0x10c/0x190 drivers/i2c/i2c-core-base.c:2371
i2c_master_recv include/linux/i2c.h:79 [inline]
i2cdev_read+0x111/0x2b0 drivers/i2c/i2c-dev.c:155
vfs_read+0x1e4/0xb40 fs/read_write.c:572
ksys_pread64 fs/read_write.c:764 [inline]
__do_sys_pread64 fs/read_write.c:772 [inline]
__se_sys_pread64 fs/read_write.c:769 [inline]
__x64_sys_pread64+0x1eb/0x250 fs/read_write.c:769
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f335519de99
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:00007f3355f9d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000011
RAX: ffffffffffffffda RBX: 00007f3355426090 RCX: 00007f335519de99
RDX: 00000000000000ea RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f3355233eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3355426128 R14: 00007f3355426090 R15: 00007fffc564afd8
</TASK>
----------------
Code disassembly (best guess):
0: 0f b6 14 11 movzbl (%rcx,%rdx,1),%edx
4: 38 d0 cmp %dl,%al
6: 7c 08 jl 0x10
8: 84 d2 test %dl,%dl
a: 0f 85 12 03 00 00 jne 0x322
10: 44 8b 1d 90 58 66 05 mov 0x5665890(%rip),%r11d # 0x56658a7
17: 45 85 db test %r11d,%r11d
1a: 75 13 jne 0x2f
1c: 48 8d 3d 84 b1 69 05 lea 0x569b184(%rip),%rdi # 0x569b1a7
23: 48 c7 c6 60 cb cf 8b mov $0xffffffff8bcfcb60,%rsi
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: 90 nop
30: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
37: fc ff df
3a: 4c 89 f2 mov %r14,%rdx
3d: 48 rex.W
3e: c1 .byte 0xc1
3f: ea (bad)


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