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: 6933 Comm: syz.2.319 Not tainted 6.15.0-rc2-syzkaller-00087-gcfb2e2c57aef #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:580 [inline]
RIP: 0010:__mutex_lock+0x14f/0xb90 kernel/locking/mutex.c:746
Code: d0 7c 08 84 d2 0f 85 ab 07 00 00 8b 35 5a 89 42 0f 85 f6 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 93 07 00 00 48 3b 5b 60 0f 85 e0 01 00 00 bf 01
RSP: 0018:ffffc9000c6ef690 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000068 RCX: 1ffffffff356cabc
RDX: 0000000000000019 RSI: 0000000000000000 RDI: 00000000000000c8
RBP: ffffc9000c6ef7d0 R08: ffffffff87e2f7c5 R09: 0000000000000000
R10: ffffc9000c6ef7e8 R11: 0000000000000001 R12: dffffc0000000000
R13: ffffc9000c6ef710 R14: 0000000000000000 R15: 1ffff920018ddedc
FS:  00007f3ffe56e6c0(0000) GS:ffff888124ab0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3dbe49 CR3: 0000000078778000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dvb_usbv2_generic_write+0x25/0x50 drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c:77
 mxl111sf_ctrl_msg+0x215/0x300 drivers/media/usb/dvb-usb-v2/mxl111sf.c:73
 mxl111sf_write_reg+0x95/0x170 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+0x6b3/0x2190 drivers/i2c/i2c-core-base.c:2259
 i2c_transfer drivers/i2c/i2c-core-base.c:2315 [inline]
 i2c_transfer+0x1da/0x380 drivers/i2c/i2c-core-base.c:2291
 i2c_transfer_buffer_flags+0x10c/0x190 drivers/i2c/i2c-core-base.c:2343
 i2c_master_send include/linux/i2c.h:109 [inline]
 i2cdev_write+0x11e/0x210 drivers/i2c/i2c-dev.c:183
 vfs_write+0x25c/0x1180 fs/read_write.c:682
 ksys_write+0x12a/0x240 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3ffd78e169
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:00007f3ffe56e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f3ffd9b5fa0 RCX: 00007f3ffd78e169
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f3ffd810a68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3ffd9b5fa0 R15: 00007ffcc626bc78
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:580 [inline]
RIP: 0010:__mutex_lock+0x14f/0xb90 kernel/locking/mutex.c:746
Code: d0 7c 08 84 d2 0f 85 ab 07 00 00 8b 35 5a 89 42 0f 85 f6 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 93 07 00 00 48 3b 5b 60 0f 85 e0 01 00 00 bf 01
RSP: 0018:ffffc9000c6ef690 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000068 RCX: 1ffffffff356cabc
RDX: 0000000000000019 RSI: 0000000000000000 RDI: 00000000000000c8
RBP: ffffc9000c6ef7d0 R08: ffffffff87e2f7c5 R09: 0000000000000000
R10: ffffc9000c6ef7e8 R11: 0000000000000001 R12: dffffc0000000000
R13: ffffc9000c6ef710 R14: 0000000000000000 R15: 1ffff920018ddedc
FS:  00007f3ffe56e6c0(0000) GS:ffff8881249b0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2edc371f20 CR3: 0000000078778000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	d0 7c 08 84          	sarb   -0x7c(%rax,%rcx,1)
   4:	d2 0f                	rorb   %cl,(%rdi)
   6:	85 ab 07 00 00 8b    	test   %ebp,-0x74fffff9(%rbx)
   c:	35 5a 89 42 0f       	xor    $0xf42895a,%eax
  11:	85 f6                	test   %esi,%esi
  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 93 07 00 00    	jne    0x7c7
  34:	48 3b 5b 60          	cmp    0x60(%rbx),%rbx
  38:	0f 85 e0 01 00 00    	jne    0x21e
  3e:	bf                   	.byte 0xbf
  3f:	01                   	.byte 0x1