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: 5971 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:582 [inline]
RIP: 0010:__mutex_lock+0xf1/0xc80 kernel/locking/mutex.c:747
Code: 0f b6 04 30 84 c0 0f 85 8a 0a 00 00 83 3d 76 ca 73 0d 00 75 2a 48 8d 7b 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 b4 b7 44 f7 48 39 5b 60 0f 85 f4 09 00 00 bf
RSP: 0018:ffffc900049873c0 EFLAGS: 00010202
RAX: 0000000000000019 RBX: 0000000000000068 RCX: dffffc0000000000
RDX: ffff88803014a23c RSI: ffffffff8acae160 RDI: 00000000000000c8
RBP: ffffc90004987518 R08: ffffffff87258436 R09: 000000000000001e
R10: dffffc0000000000 R11: ffffed100eeea32c R12: 1ffff92000930e88
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
FS:  00005555609b8500(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5f2f8701d0 CR3: 0000000075f00000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 dvb_usbv2_generic_write+0x26/0x50 drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c:77
 mxl111sf_ctrl_msg+0x162/0x2c0 drivers/media/usb/dvb-usb-v2/mxl111sf.c:73
 mxl111sf_write_reg+0xaa/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+0x464/0x5030 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:813
 __i2c_transfer+0x891/0x2090 drivers/i2c/i2c-core-base.c:-1
 i2c_transfer+0x261/0x3a0 drivers/i2c/i2c-core-base.c:2361
 i2cdev_ioctl_rdwr+0x3b0/0x690 drivers/i2c/i2c-dev.c:297
 i2cdev_ioctl+0x6a0/0x840 drivers/i2c/i2c-dev.c:458
 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: 0033:0x7f5f2f99e2d9
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:00007ffca88940a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5f2fc25fa0 RCX: 00007f5f2f99e2d9
RDX: 0000200000000300 RSI: 0000000000000707 RDI: 0000000000000004
RBP: 00007f5f2fa35888 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5f2fc25fac R14: 00007f5f2fc25fa0 R15: 00007f5f2fc25fa0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:582 [inline]
RIP: 0010:__mutex_lock+0xf1/0xc80 kernel/locking/mutex.c:747
Code: 0f b6 04 30 84 c0 0f 85 8a 0a 00 00 83 3d 76 ca 73 0d 00 75 2a 48 8d 7b 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 b4 b7 44 f7 48 39 5b 60 0f 85 f4 09 00 00 bf
RSP: 0018:ffffc900049873c0 EFLAGS: 00010202
RAX: 0000000000000019 RBX: 0000000000000068 RCX: dffffc0000000000
RDX: ffff88803014a23c RSI: ffffffff8acae160 RDI: 00000000000000c8
RBP: ffffc90004987518 R08: ffffffff87258436 R09: 000000000000001e
R10: dffffc0000000000 R11: ffffed100eeea32c R12: 1ffff92000930e88
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
FS:  00005555609b8500(0000) GS:ffff8880b8d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f25a35eb9c0 CR3: 0000000075f00000 CR4: 00000000003506e0
----------------
Code disassembly (best guess):
   0:	0f b6 04 30          	movzbl (%rax,%rsi,1),%eax
   4:	84 c0                	test   %al,%al
   6:	0f 85 8a 0a 00 00    	jne    0xa96
   c:	83 3d 76 ca 73 0d 00 	cmpl   $0x0,0xd73ca76(%rip)        # 0xd73ca89
  13:	75 2a                	jne    0x3f
  15:	48 8d 7b 60          	lea    0x60(%rbx),%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 b4 b7 44 f7       	call   0xf744b7e9
  35:	48 39 5b 60          	cmp    %rbx,0x60(%rbx)
  39:	0f 85 f4 09 00 00    	jne    0xa33
  3f:	bf                   	.byte 0xbf