Oops: general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf]
CPU: 1 UID: 0 PID: 14670 Comm: syz.0.2375 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:593 [inline]
RIP: 0010:__mutex_lock+0x15c/0x1ca0 kernel/locking/mutex.c:776
Code: 08 84 d2 0f 85 f3 13 00 00 44 8b 0d 4e 69 48 0f 45 85 c9 75 29 48 b8 00 00 00 00 00 fc ff df 49 8d 7f 60 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d9 13 00 00 4d 3b 7f 60 0f 85 ff 09 00 00 bf 01
RSP: 0018:ffffc9000b5df7b0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000019 RSI: ffffffff8daa79d4 RDI: 00000000000000c8
RBP: ffffc9000b5df930 R08: ffffffff87d44c65 R09: 0000000000000000
R10: ffffc9000b5df948 R11: 0000000000000001 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000068
FS:  00007f27503b96c0(0000) GS:ffff8881249f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000008 CR3: 0000000021ec3000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 dvb_usbv2_generic_write+0x25/0x50 drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c:77
 mxl111sf_ctrl_msg+0x242/0x2f0 drivers/media/usb/dvb-usb-v2/mxl111sf.c:73
 mxl111sf_write_reg+0x95/0x1a0 drivers/media/usb/dvb-usb-v2/mxl111sf.c:123
 mxl111sf_i2c_start+0x6e/0x280 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:130
 mxl111sf_i2c_sw_xfer_msg drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:265 [inline]
 mxl111sf_i2c_xfer+0x1e9d/0x3be0 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:813
 __i2c_transfer+0x6b6/0x2100 drivers/i2c/i2c-core-base.c:2261
 i2c_transfer drivers/i2c/i2c-core-base.c:2317 [inline]
 i2c_transfer+0x1da/0x380 drivers/i2c/i2c-core-base.c:2293
 i2cdev_ioctl_rdwr+0x373/0x710 drivers/i2c/i2c-dev.c:306
 i2cdev_ioctl+0x628/0x840 drivers/i2c/i2c-dev.c:467
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f274f58f749
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:00007f27503b9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f274f7e6090 RCX: 00007f274f58f749
RDX: 0000200000000240 RSI: 0000000000000707 RDI: 0000000000000007
RBP: 00007f274f613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f274f7e6128 R14: 00007f274f7e6090 R15: 00007ffdf81790e8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:593 [inline]
RIP: 0010:__mutex_lock+0x15c/0x1ca0 kernel/locking/mutex.c:776
Code: 08 84 d2 0f 85 f3 13 00 00 44 8b 0d 4e 69 48 0f 45 85 c9 75 29 48 b8 00 00 00 00 00 fc ff df 49 8d 7f 60 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d9 13 00 00 4d 3b 7f 60 0f 85 ff 09 00 00 bf 01
RSP: 0018:ffffc9000b5df7b0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000019 RSI: ffffffff8daa79d4 RDI: 00000000000000c8
RBP: ffffc9000b5df930 R08: ffffffff87d44c65 R09: 0000000000000000
R10: ffffc9000b5df948 R11: 0000000000000001 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000068
FS:  00007f27503b96c0(0000) GS:ffff8881249f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffce8f0ecf0 CR3: 0000000021ec3000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	08 84 d2 0f 85 f3 13 	or     %al,0x13f3850f(%rdx,%rdx,8)
   7:	00 00                	add    %al,(%rax)
   9:	44 8b 0d 4e 69 48 0f 	mov    0xf48694e(%rip),%r9d        # 0xf48695e
  10:	45 85 c9             	test   %r9d,%r9d
  13:	75 29                	jne    0x3e
  15:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1c:	fc ff df
  1f:	49 8d 7f 60          	lea    0x60(%r15),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 d9 13 00 00    	jne    0x140d
  34:	4d 3b 7f 60          	cmp    0x60(%r15),%r15
  38:	0f 85 ff 09 00 00    	jne    0xa3d
  3e:	bf                   	.byte 0xbf
  3f:	01                   	.byte 0x1