Oops: general protection fault, probably for non-canonical address 0xdffffc0000000018: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7]
CPU: 1 UID: 0 PID: 5675 Comm: syz-executor432 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:625 [inline]
RIP: 0010:__mutex_lock+0x149/0x1550 kernel/locking/mutex.c:821
Code: c0 40 d5 9e 9a 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 3f 12 00 00 83 3d 45 75 b6 0e 00 75 22 49 8d 7c 24 58 48 89 f8 48 c1 e8 03 <80> 3c 18 00 74 05 e8 bc b1 4f f6 4d 39 64 24 58 0f 85 52 11 00 00
RSP: 0018:ffffc90003bf7280 EFLAGS: 00010206
RAX: 0000000000000018 RBX: dffffc0000000000 RCX: ffffffff9a9ed503
RDX: 0000000000000000 RSI: ffffffff8e69f2bd RDI: 00000000000000c0
RBP: ffffc90003bf7418 R08: ffffc90003bf7387 R09: 0000000000000000
R10: ffffc90003bf7360 R11: fffff5200077ee71 R12: 0000000000000068
R13: 0000000000000000 R14: 1ffff9200077ee64 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888124dc7000(0063) knlGS:00000000585463c0
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000058546340 CR3: 000000007a8b0000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 dvb_usbv2_generic_write+0x26/0x60 drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c:77
 mxl111sf_ctrl_msg+0x160/0x2f0 drivers/media/usb/dvb-usb-v2/mxl111sf.c:73
 mxl111sf_write_reg+0xa9/0x1b0 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+0x463/0x5060 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:813
 __i2c_transfer+0x7bf/0x1fe0 drivers/i2c/i2c-core-base.c:-1
 i2c_transfer+0x1cb/0x2d0 drivers/i2c/i2c-core-base.c:2350
 i2cdev_ioctl_rdwr+0x460/0x740 drivers/i2c/i2c-dev.c:306
 compat_i2cdev_ioctl+0x59f/0x5c0 drivers/i2c/i2c-dev.c:575
 __do_compat_sys_ioctl fs/ioctl.c:695 [inline]
 __se_compat_sys_ioctl fs/ioctl.c:638 [inline]
 __ia32_compat_sys_ioctl+0x5ea/0x950 fs/ioctl.c:638
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline]
 __do_fast_syscall_32+0x27a/0x6a0 arch/x86/entry/syscall_32.c:291
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:316
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7eb00ec
Code: 90 85 d2 74 0a 89 ce 81 e6 ff 0f 00 00 89 32 85 c0 74 05 c1 e9 0c 89 08 31 c0 5e 5d c3 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 58 b8
RSP: 002b:00000000ff98274c EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000000707
RDX: 0000000080000080 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:625 [inline]
RIP: 0010:__mutex_lock+0x149/0x1550 kernel/locking/mutex.c:821
Code: c0 40 d5 9e 9a 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 3f 12 00 00 83 3d 45 75 b6 0e 00 75 22 49 8d 7c 24 58 48 89 f8 48 c1 e8 03 <80> 3c 18 00 74 05 e8 bc b1 4f f6 4d 39 64 24 58 0f 85 52 11 00 00
RSP: 0018:ffffc90003bf7280 EFLAGS: 00010206
RAX: 0000000000000018 RBX: dffffc0000000000 RCX: ffffffff9a9ed503
RDX: 0000000000000000 RSI: ffffffff8e69f2bd RDI: 00000000000000c0
RBP: ffffc90003bf7418 R08: ffffc90003bf7387 R09: 0000000000000000
R10: ffffc90003bf7360 R11: fffff5200077ee71 R12: 0000000000000068
R13: 0000000000000000 R14: 1ffff9200077ee64 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888124cc7000(0063) knlGS:00000000585463c0
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f7f10b40 CR3: 000000007a8b0000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	40                   	rex
   1:	d5 9e 9a 48 c1       	{rex2 0x9e} setp -0x3f(%r16)
   6:	e8 03 0f b6 04       	call   0x4b60f0e
   b:	18 84 c0 0f 85 3f 12 	sbb    %al,0x123f850f(%rax,%rax,8)
  12:	00 00                	add    %al,(%rax)
  14:	83 3d 45 75 b6 0e 00 	cmpl   $0x0,0xeb67545(%rip)        # 0xeb67560
  1b:	75 22                	jne    0x3f
  1d:	49 8d 7c 24 58       	lea    0x58(%r12),%rdi
  22:	48 89 f8             	mov    %rdi,%rax
  25:	48 c1 e8 03          	shr    $0x3,%rax
* 29:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1) <-- trapping instruction
  2d:	74 05                	je     0x34
  2f:	e8 bc b1 4f f6       	call   0xf64fb1f0
  34:	4d 39 64 24 58       	cmp    %r12,0x58(%r12)
  39:	0f 85 52 11 00 00    	jne    0x1191