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: 8151 Comm: syz.0.907 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:625 [inline]
RIP: 0010:__mutex_lock+0x14e/0x1550 kernel/locking/mutex.c:820
Code: e0 a3 43 9a 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 40 12 00 00 83 3d 70 c7 9a 0e 00 75 23 49 8d 7c 24 58 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 74 05 e8 96 32 88 f6 4d 39 64 24 58 0f 85 6c 11 00
RSP: 0018:ffffc9001bbcf240 EFLAGS: 00010206
RAX: 0000000000000018 RBX: 0000000000000000 RCX: ffffffff9a43a303
RDX: 0000000000000000 RSI: ffffffff8e216dde RDI: 00000000000000c0
RBP: ffffc9001bbcf3f8 R08: ffffc9001bbcf367 R09: 0000000000000000
R10: ffffc9001bbcf340 R11: fffff52003779e6d R12: 0000000000000068
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92003779e60
FS:  0000000000000000(0000) GS:ffff88812539c000(0063) knlGS:00000000f5466b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000077560000 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+0x496/0x5100 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:813
 __i2c_transfer+0x79a/0x1f70 drivers/i2c/i2c-core-base.c:-1
 i2c_transfer+0x1cc/0x2d0 drivers/i2c/i2c-core-base.c:2316
 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:83 [inline]
 __do_fast_syscall_32+0x23e/0x6f0 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:332
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7fa901c
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:00000000f546650c EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000000707
RDX: 00000000800001c0 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+0x14e/0x1550 kernel/locking/mutex.c:820
Code: e0 a3 43 9a 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 40 12 00 00 83 3d 70 c7 9a 0e 00 75 23 49 8d 7c 24 58 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 74 05 e8 96 32 88 f6 4d 39 64 24 58 0f 85 6c 11 00
RSP: 0018:ffffc9001bbcf240 EFLAGS: 00010206
RAX: 0000000000000018 RBX: 0000000000000000 RCX: ffffffff9a43a303
RDX: 0000000000000000 RSI: ffffffff8e216dde RDI: 00000000000000c0
RBP: ffffc9001bbcf3f8 R08: ffffc9001bbcf367 R09: 0000000000000000
R10: ffffc9001bbcf340 R11: fffff52003779e6d R12: 0000000000000068
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92003779e60
FS:  0000000000000000(0000) GS:ffff88812529c000(0063) knlGS:00000000f5466b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000080047018 CR3: 0000000077560000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	e0 a3                	loopne 0xffffffa5
   2:	43 9a                	rex.XB (bad)
   4:	48 c1 e8 03          	shr    $0x3,%rax
   8:	42 0f b6 04 30       	movzbl (%rax,%r14,1),%eax
   d:	84 c0                	test   %al,%al
   f:	0f 85 40 12 00 00    	jne    0x1255
  15:	83 3d 70 c7 9a 0e 00 	cmpl   $0x0,0xe9ac770(%rip)        # 0xe9ac78c
  1c:	75 23                	jne    0x41
  1e:	49 8d 7c 24 58       	lea    0x58(%r12),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1) <-- trapping instruction
  2f:	74 05                	je     0x36
  31:	e8 96 32 88 f6       	call   0xf68832cc
  36:	4d 39 64 24 58       	cmp    %r12,0x58(%r12)
  3b:	0f                   	.byte 0xf
  3c:	85 6c 11 00          	test   %ebp,0x0(%rcx,%rdx,1)