general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf]
CPU: 1 PID: 4321 Comm: syz.4.13 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__mutex_lock_common+0x104/0x2400 kernel/locking/mutex.c:575
Code: 04 18 84 c0 0f 85 66 1c 00 00 48 8d bc 24 e0 00 00 00 83 3d 5d 43 69 0c 00 75 30 48 8b 04 24 48 8d 78 60 48 89 f8 48 c1 e8 03 <80> 3c 18 00 74 05 e8 21 78 fb f7 48 8b 04 24 48 39 40 60 48 8d bc
RSP: 0018:ffffc9000337f360 EFLAGS: 00010202
RAX: 0000000000000019 RBX: dffffc0000000000 RCX: ffffffff962bdf03
RDX: ffff888027601dc0 RSI: ffffffff8a2b2ea0 RDI: 00000000000000c8
RBP: ffffc9000337f4e8 R08: ffffffff8690d612 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100f60922c R12: 0000000000000000
R13: 1ffff9200066fe84 R14: ffffffff8690d612 R15: 0000000000000000
FS:  00007f5dbdb4b6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32920ff8 CR3: 000000002491e000 CR4: 00000000003506e0
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+0xa6/0x180 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+0x493/0x50d0 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:813
 __i2c_transfer+0x880/0x20b0 drivers/i2c/i2c-core-base.c:-1
 i2c_transfer+0x25d/0x3a0 drivers/i2c/i2c-core-base.c:2330
 i2cdev_ioctl_rdwr+0x3dc/0x6d0 drivers/i2c/i2c-dev.c:297
 i2cdev_ioctl+0x610/0x7b0 drivers/i2c/i2c-dev.c:458
 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: 0033:0x7f5dbf8efcb9
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:00007f5dbdb4b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5dbfb6afa0 RCX: 00007f5dbf8efcb9
RDX: 0000200000000a40 RSI: 0000000000000707 RDI: 0000000000000004
RBP: 00007f5dbf95dbf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5dbfb6b038 R14: 00007f5dbfb6afa0 R15: 00007ffd711d4cc8
 </TASK>
Modules linked in:
---[ end trace e4b20659b1ecdb93 ]---
RIP: 0010:__mutex_lock_common+0x104/0x2400 kernel/locking/mutex.c:575
Code: 04 18 84 c0 0f 85 66 1c 00 00 48 8d bc 24 e0 00 00 00 83 3d 5d 43 69 0c 00 75 30 48 8b 04 24 48 8d 78 60 48 89 f8 48 c1 e8 03 <80> 3c 18 00 74 05 e8 21 78 fb f7 48 8b 04 24 48 39 40 60 48 8d bc
RSP: 0018:ffffc9000337f360 EFLAGS: 00010202
RAX: 0000000000000019 RBX: dffffc0000000000 RCX: ffffffff962bdf03
RDX: ffff888027601dc0 RSI: ffffffff8a2b2ea0 RDI: 00000000000000c8
RBP: ffffc9000337f4e8 R08: ffffffff8690d612 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100f60922c R12: 0000000000000000
R13: 1ffff9200066fe84 R14: ffffffff8690d612 R15: 0000000000000000
FS:  00007f5dbdb4b6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f174b3df000 CR3: 000000002491e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	04 18                	add    $0x18,%al
   2:	84 c0                	test   %al,%al
   4:	0f 85 66 1c 00 00    	jne    0x1c70
   a:	48 8d bc 24 e0 00 00 	lea    0xe0(%rsp),%rdi
  11:	00
  12:	83 3d 5d 43 69 0c 00 	cmpl   $0x0,0xc69435d(%rip)        # 0xc694376
  19:	75 30                	jne    0x4b
  1b:	48 8b 04 24          	mov    (%rsp),%rax
  1f:	48 8d 78 60          	lea    0x60(%rax),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1) <-- trapping instruction
  2e:	74 05                	je     0x35
  30:	e8 21 78 fb f7       	call   0xf7fb7856
  35:	48 8b 04 24          	mov    (%rsp),%rax
  39:	48 39 40 60          	cmp    %rax,0x60(%rax)
  3d:	48                   	rex.W
  3e:	8d                   	.byte 0x8d
  3f:	bc                   	.byte 0xbc