general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf]
CPU: 0 PID: 4529 Comm: syz.3.85 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:__mutex_lock_common+0x109/0x2390 kernel/locking/mutex.c:575
Code: 8d bc 24 e0 00 00 00 83 3d 03 7c 5a 0c 00 4c 8b 74 24 18 75 32 49 8d 7e 60 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 bc 6e 0a f8 4d 39 76 60 48 8d bc 24 e0 00 00
RSP: 0018:ffffc90002a9f0c0 EFLAGS: 00010202
RAX: 0000000000000019 RBX: ffffffff868114a2 RCX: dffffc0000000000
RDX: ffff888020ca9dc0 RSI: ffffffff8a0b2b40 RDI: 00000000000000c8
RBP: ffffc90002a9f248 R08: ffffffff868114a2 R09: 0000000000000000
R10: ffffed100bb0d02c R11: 1ffff1100bb0d02b R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000068 R15: 0000000000000000
FS: 0000555573829500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31663fff CR3: 000000005b35b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
dvb_usbv2_generic_write+0x22/0x50 drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c:77
mxl111sf_ctrl_msg+0x12a/0x260 drivers/media/usb/dvb-usb-v2/mxl111sf.c:73
mxl111sf_write_reg+0x9d/0x180 drivers/media/usb/dvb-usb-v2/mxl111sf.c:123
mxl111sf_i2c_start drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:130 [inline]
mxl111sf_i2c_sw_xfer_msg drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:-1 [inline]
mxl111sf_i2c_xfer+0x45e/0x4ed0 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:813
__i2c_transfer+0x864/0x2060 drivers/i2c/i2c-core-base.c:-1
i2c_smbus_xfer_emulated drivers/i2c/i2c-core-smbus.c:469 [inline]
__i2c_smbus_xfer+0xfc9/0x1d50 drivers/i2c/i2c-core-smbus.c:607
i2c_smbus_xfer+0x263/0x3a0 drivers/i2c/i2c-core-smbus.c:545
i2cdev_ioctl_smbus+0x3e3/0x650 drivers/i2c/i2c-dev.c:381
i2cdev_ioctl+0x545/0x750 drivers/i2c/i2c-dev.c:467
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fa65649cfc9
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:00007ffc0daf5c98 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa6566f3fa0 RCX: 00007fa65649cfc9
RDX: 00002000000001c0 RSI: 0000000000000720 RDI: 0000000000000003
RBP: 00007fa65651ff91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa6566f3fa0 R14: 00007fa6566f3fa0 R15: 0000000000000003
</TASK>
Modules linked in:
---[ end trace 4f6d58ae148bff95 ]---
RIP: 0010:__mutex_lock_common+0x109/0x2390 kernel/locking/mutex.c:575
Code: 8d bc 24 e0 00 00 00 83 3d 03 7c 5a 0c 00 4c 8b 74 24 18 75 32 49 8d 7e 60 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 bc 6e 0a f8 4d 39 76 60 48 8d bc 24 e0 00 00
RSP: 0018:ffffc90002a9f0c0 EFLAGS: 00010202
RAX: 0000000000000019 RBX: ffffffff868114a2 RCX: dffffc0000000000
RDX: ffff888020ca9dc0 RSI: ffffffff8a0b2b40 RDI: 00000000000000c8
RBP: ffffc90002a9f248 R08: ffffffff868114a2 R09: 0000000000000000
R10: ffffed100bb0d02c R11: 1ffff1100bb0d02b R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000068 R15: 0000000000000000
FS: 0000555573829500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc0daf6000 CR3: 000000005b35b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 8d bc 24 e0 00 00 00 lea 0xe0(%rsp),%edi
7: 83 3d 03 7c 5a 0c 00 cmpl $0x0,0xc5a7c03(%rip) # 0xc5a7c11
e: 4c 8b 74 24 18 mov 0x18(%rsp),%r14
13: 75 32 jne 0x47
15: 49 8d 7e 60 lea 0x60(%r14),%rdi
19: 48 89 f8 mov %rdi,%rax
1c: 48 c1 e8 03 shr $0x3,%rax
20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
27: fc ff df
* 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction
2e: 74 05 je 0x35
30: e8 bc 6e 0a f8 call 0xf80a6ef1
35: 4d 39 76 60 cmp %r14,0x60(%r14)
39: 48 rex.W
3a: 8d .byte 0x8d
3b: bc 24 e0 00 00 mov $0xe024,%esp