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: 29434 Comm: syz.6.9325 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:593 [inline]
RIP: 0010:__mutex_lock+0x15b/0x1b90 kernel/locking/mutex.c:776
Code: d0 7c 08 84 d2 0f 85 3c 13 00 00 8b 3d 0e 09 8d 0f 85 ff 75 29 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 60 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 24 13 00 00 48 3b 5b 60 0f 85 85 07 00 00 bf 01
RSP: 0018:ffffc900068774a0 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: 0000000000000068 RCX: 0000000000000001
RDX: 0000000000000019 RSI: ffffffff8de57361 RDI: 00000000000000c8
RBP: ffffc90006877620 R08: ffffffff88007ba5 R09: 0000000000000000
R10: ffffc90006877638 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000001
FS:  00007fba911bb6c0(0000) GS:ffff888124445000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32e1bff8 CR3: 0000000032ac2000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 dvb_usbv2_generic_write+0x25/0x50 drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c:77
 mxl111sf_ctrl_msg+0x179/0x2b0 drivers/media/usb/dvb-usb-v2/mxl111sf.c:73
 mxl111sf_write_reg+0x96/0x130 drivers/media/usb/dvb-usb-v2/mxl111sf.c:123
 mxl111sf_i2c_start+0x6e/0x220 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+0x178e/0x3240 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:813
 __i2c_transfer+0x5d9/0x17f0 drivers/i2c/i2c-core-base.c:2261
 i2c_smbus_xfer_emulated+0x22a/0x10e0 drivers/i2c/i2c-core-smbus.c:470
 __i2c_smbus_xfer+0x5b7/0x1080 drivers/i2c/i2c-core-smbus.c:608
 i2c_smbus_xfer+0x185/0x3c0 drivers/i2c/i2c-core-smbus.c:546
 i2cdev_ioctl_smbus+0x233/0xac0 drivers/i2c/i2c-dev.c:389
 i2cdev_ioctl+0x3cf/0x830 drivers/i2c/i2c-dev.c:478
 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+0x106/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fba9039c799
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:00007fba911bb028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fba90615fa0 RCX: 00007fba9039c799
RDX: 0000200000000280 RSI: 0000000000000720 RDI: 0000000000000004
RBP: 00007fba90432bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fba90616038 R14: 00007fba90615fa0 R15: 00007ffe3a252798
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:593 [inline]
RIP: 0010:__mutex_lock+0x15b/0x1b90 kernel/locking/mutex.c:776
Code: d0 7c 08 84 d2 0f 85 3c 13 00 00 8b 3d 0e 09 8d 0f 85 ff 75 29 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 60 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 24 13 00 00 48 3b 5b 60 0f 85 85 07 00 00 bf 01
RSP: 0018:ffffc900068774a0 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: 0000000000000068 RCX: 0000000000000001
RDX: 0000000000000019 RSI: ffffffff8de57361 RDI: 00000000000000c8
RBP: ffffc90006877620 R08: ffffffff88007ba5 R09: 0000000000000000
R10: ffffc90006877638 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000001
FS:  00007fba911bb6c0(0000) GS:ffff888124445000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbc85a4ea90 CR3: 0000000032ac2000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	d0 7c 08 84          	sarb   $1,-0x7c(%rax,%rcx,1)
   4:	d2 0f                	rorb   %cl,(%rdi)
   6:	85 3c 13             	test   %edi,(%rbx,%rdx,1)
   9:	00 00                	add    %al,(%rax)
   b:	8b 3d 0e 09 8d 0f    	mov    0xf8d090e(%rip),%edi        # 0xf8d091f
  11:	85 ff                	test   %edi,%edi
  13:	75 29                	jne    0x3e
  15:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1c:	fc ff df
  1f:	48 8d 7b 60          	lea    0x60(%rbx),%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 24 13 00 00    	jne    0x1358
  34:	48 3b 5b 60          	cmp    0x60(%rbx),%rbx
  38:	0f 85 85 07 00 00    	jne    0x7c3
  3e:	bf                   	.byte 0xbf
  3f:	01                   	.byte 0x1