Oops: general protection fault, probably for non-canonical address 0xdffffc0000000018: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7]
CPU: 0 UID: 0 PID: 24918 Comm: syz.3.5300 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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 35 9e 9a 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 3f 12 00 00 83 3d 05 66 b7 0e 00 75 22 49 8d 7c 24 58 48 89 f8 48 c1 e8 03 <80> 3c 18 00 74 05 e8 ec 0a 51 f6 4d 39 64 24 58 0f 85 52 11 00 00
RSP: 0018:ffffc90006017460 EFLAGS: 00010206
RAX: 0000000000000018 RBX: dffffc0000000000 RCX: ffffffff9a9e3503
RDX: 0000000000000000 RSI: ffffffff8e69c060 RDI: 00000000000000c0
RBP: ffffc900060175f8 R08: ffffc90006017567 R09: 0000000000000000
R10: ffffc90006017540 R11: fffff52000c02ead R12: 0000000000000068
R13: 0000000000000000 R14: 1ffff92000c02ea0 R15: 0000000000000000
FS:  00007fc102bf66c0(0000) GS:ffff888124cd1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000080 CR3: 0000000043af2000 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
 i2cdev_ioctl+0x6a5/0x880 drivers/i2c/i2c-dev.c:467
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc10499e159
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:00007fc102bf6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc104c25fa0 RCX: 00007fc10499e159
RDX: 00002000000008c0 RSI: 0000000000000707 RDI: 0000000000000006
RBP: 00007fc104a3506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc104c26038 R14: 00007fc104c25fa0 R15: 00007fc104d4fa48
 </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 35 9e 9a 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 3f 12 00 00 83 3d 05 66 b7 0e 00 75 22 49 8d 7c 24 58 48 89 f8 48 c1 e8 03 <80> 3c 18 00 74 05 e8 ec 0a 51 f6 4d 39 64 24 58 0f 85 52 11 00 00
RSP: 0018:ffffc90006017460 EFLAGS: 00010206
RAX: 0000000000000018 RBX: dffffc0000000000 RCX: ffffffff9a9e3503
RDX: 0000000000000000 RSI: ffffffff8e69c060 RDI: 00000000000000c0
RBP: ffffc900060175f8 R08: ffffc90006017567 R09: 0000000000000000
R10: ffffc90006017540 R11: fffff52000c02ead R12: 0000000000000068
R13: 0000000000000000 R14: 1ffff92000c02ea0 R15: 0000000000000000
FS:  00007fc102bf66c0(0000) GS:ffff888124dd1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc1049eb840 CR3: 0000000043af2000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	40 35 9e 9a 48 c1    	rex xor $0xc1489a9e,%eax
   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 05 66 b7 0e 00 	cmpl   $0x0,0xeb76605(%rip)        # 0xeb76620
  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 ec 0a 51 f6       	call   0xf6510b20
  34:	4d 39 64 24 58       	cmp    %r12,0x58(%r12)
  39:	0f 85 52 11 00 00    	jne    0x1191