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: 8323 Comm: syz.2.625 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+0x15d/0x10c0 kernel/locking/mutex.c:746
Code: c0 80 f6 73 9a 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 07 0e 00 00 83 3d 40 aa 41 0e 00 75 21 49 8d 7e 60 48 89 f8 48 c1 e8 03 <42> 80 3c 38 00 74 05 e8 67 49 fb f5 4d 39 76 60 0f 85 81 0d 00 00
RSP: 0018:ffffc90004ba6f40 EFLAGS: 00010202
RAX: 0000000000000019 RBX: ffffc90004ba7000 RCX: ffffffff9a73f603
RDX: ffff8880259d8000 RSI: ffffffff8e4fe229 RDI: 00000000000000c8
RBP: ffffc90004ba70d8 R08: ffffc90004ba7047 R09: 0000000000000000
R10: ffffc90004ba7020 R11: fffff52000974e09 R12: 0000000000000000
R13: ffffc90004ba7008 R14: 0000000000000068 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888124f93000(0063) knlGS:00000000f50adb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000008016d018 CR3: 000000007bf08000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dvb_usbv2_generic_write+0x26/0x50 drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c:77
 mxl111sf_ctrl_msg+0x172/0x2e0 drivers/media/usb/dvb-usb-v2/mxl111sf.c:73
 mxl111sf_write_reg+0xda/0x1f0 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+0x923/0x8aa0 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:813
 __i2c_transfer+0x859/0x2250 drivers/i2c/i2c-core-base.c:-1
 i2c_transfer+0x2c2/0x430 drivers/i2c/i2c-core-base.c:2315
 i2c_transfer_buffer_flags+0x182/0x260 drivers/i2c/i2c-core-base.c:2343
 i2c_master_send include/linux/i2c.h:109 [inline]
 i2cdev_write+0x110/0x1b0 drivers/i2c/i2c-dev.c:183
 vfs_write+0x2bc/0xd10 fs/read_write.c:682
 ksys_write+0x19d/0x2d0 fs/read_write.c:736
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xb4/0x110 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:331
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf70bd579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 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 90 90
RSP: 002b:00000000f50ad55c EFLAGS: 00000206 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000000000
RDX: 0000000000000000 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:580 [inline]
RIP: 0010:__mutex_lock+0x15d/0x10c0 kernel/locking/mutex.c:746
Code: c0 80 f6 73 9a 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 07 0e 00 00 83 3d 40 aa 41 0e 00 75 21 49 8d 7e 60 48 89 f8 48 c1 e8 03 <42> 80 3c 38 00 74 05 e8 67 49 fb f5 4d 39 76 60 0f 85 81 0d 00 00
RSP: 0018:ffffc90004ba6f40 EFLAGS: 00010202
RAX: 0000000000000019 RBX: ffffc90004ba7000 RCX: ffffffff9a73f603
RDX: ffff8880259d8000 RSI: ffffffff8e4fe229 RDI: 00000000000000c8
RBP: ffffc90004ba70d8 R08: ffffc90004ba7047 R09: 0000000000000000
R10: ffffc90004ba7020 R11: fffff52000974e09 R12: 0000000000000000
R13: ffffc90004ba7008 R14: 0000000000000068 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888124f93000(0063) knlGS:00000000f50adb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f5069528 CR3: 000000007bf08000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	c0 80 f6 73 9a 48 c1 	rolb   $0xc1,0x489a73f6(%rax)
   7:	e8 03 42 0f b6       	call   0xb60f420f
   c:	04 38                	add    $0x38,%al
   e:	84 c0                	test   %al,%al
  10:	0f 85 07 0e 00 00    	jne    0xe1d
  16:	83 3d 40 aa 41 0e 00 	cmpl   $0x0,0xe41aa40(%rip)        # 0xe41aa5d
  1d:	75 21                	jne    0x40
  1f:	49 8d 7e 60          	lea    0x60(%r14),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1) <-- trapping instruction
  2f:	74 05                	je     0x36
  31:	e8 67 49 fb f5       	call   0xf5fb499d
  36:	4d 39 76 60          	cmp    %r14,0x60(%r14)
  3a:	0f 85 81 0d 00 00    	jne    0xdc1