Oops: general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf]
CPU: 0 UID: 0 PID: 6361 Comm: syz.3.84 Not tainted 6.16.0-next-20250807-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:577 [inline]
RIP: 0010:__mutex_lock+0x13b/0x1360 kernel/locking/mutex.c:760
Code: 20 83 ef 99 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 3d 10 00 00 83 3d 43 d2 6b 0e 00 75 23 49 8d 7c 24 60 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 99 be 9f f6 4d 39 64 24 60 0f 85 3f 0f 00
RSP: 0018:ffffc9000b327100 EFLAGS: 00010202
RAX: 0000000000000019 RBX: ffffc9000b3271e0 RCX: ffffffff99ef8303
RDX: ffff88802f730000 RSI: ffffffff8de84af2 RDI: 00000000000000c8
RBP: ffffc9000b3272b8 R08: ffffc9000b327227 R09: 0000000000000000
R10: ffffc9000b327200 R11: fffff52001664e45 R12: 0000000000000068
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fe17e67b6c0(0000) GS:ffff8881257dd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f00fd499943 CR3: 0000000078a22000 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+0x16a/0x2e0 drivers/media/usb/dvb-usb-v2/mxl111sf.c:73
 mxl111sf_write_reg+0xa0/0x180 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+0x461/0x4f00 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:813
 __i2c_transfer+0x871/0x2170 drivers/i2c/i2c-core-base.c:-1
 i2c_transfer+0x25b/0x3a0 drivers/i2c/i2c-core-base.c:2320
 i2c_transfer_buffer_flags+0x105/0x190 drivers/i2c/i2c-core-base.c:2348
 i2c_master_send include/linux/i2c.h:109 [inline]
 i2cdev_write+0x112/0x1b0 drivers/i2c/i2c-dev.c:183
 do_loop_readv_writev fs/read_write.c:850 [inline]
 vfs_writev+0x4b6/0x960 fs/read_write.c:1059
 do_writev+0x14d/0x2d0 fs/read_write.c:1103
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe17d78ebe9
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:00007fe17e67b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007fe17d9b6090 RCX: 00007fe17d78ebe9
RDX: 0000000000000001 RSI: 0000200000000600 RDI: 0000000000000005
RBP: 00007fe17d811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe17d9b6128 R14: 00007fe17d9b6090 R15: 00007ffea4d54a68
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:577 [inline]
RIP: 0010:__mutex_lock+0x13b/0x1360 kernel/locking/mutex.c:760
Code: 20 83 ef 99 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 3d 10 00 00 83 3d 43 d2 6b 0e 00 75 23 49 8d 7c 24 60 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 99 be 9f f6 4d 39 64 24 60 0f 85 3f 0f 00
RSP: 0018:ffffc9000b327100 EFLAGS: 00010202
RAX: 0000000000000019 RBX: ffffc9000b3271e0 RCX: ffffffff99ef8303
RDX: ffff88802f730000 RSI: ffffffff8de84af2 RDI: 00000000000000c8
RBP: ffffc9000b3272b8 R08: ffffc9000b327227 R09: 0000000000000000
R10: ffffc9000b327200 R11: fffff52001664e45 R12: 0000000000000068
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fe17e67b6c0(0000) GS:ffff8881258dd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558acfb3f000 CR3: 0000000078a22000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	20 83 ef 99 48 c1    	and    %al,-0x3eb76611(%rbx)
   6:	e8 03 42 0f b6       	call   0xb60f420e
   b:	04 28                	add    $0x28,%al
   d:	84 c0                	test   %al,%al
   f:	0f 85 3d 10 00 00    	jne    0x1052
  15:	83 3d 43 d2 6b 0e 00 	cmpl   $0x0,0xe6bd243(%rip)        # 0xe6bd25f
  1c:	75 23                	jne    0x41
  1e:	49 8d 7c 24 60       	lea    0x60(%r12),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 05                	je     0x36
  31:	e8 99 be 9f f6       	call   0xf69fbecf
  36:	4d 39 64 24 60       	cmp    %r12,0x60(%r12)
  3b:	0f                   	.byte 0xf
  3c:	85 3f                	test   %edi,(%rdi)
  3e:	0f                   	.byte 0xf