general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf]
CPU: 1 PID: 4475 Comm: syz.1.18 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:582 [inline]
RIP: 0010:__mutex_lock+0xe8/0xaf0 kernel/locking/mutex.c:747
Code: c0 40 61 c0 96 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 6c 09 00 00 83 3d f5 10 88 0c 00 75 21 48 8d 7b 60 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 ec 32 9b f7 48 39 5b 60 0f 85 ef 08 00 00
RSP: 0018:ffffc900020af3a0 EFLAGS: 00010202
RAX: 0000000000000019 RBX: 0000000000000068 RCX: ffffffff96c06103
RDX: ffff8880779d8000 RSI: ffffffff8a8c2c20 RDI: 00000000000000c8
RBP: ffffc900020af4f8 R08: ffffffff86de1b82 R09: 1ffff1100b9bd02b
R10: dffffc0000000000 R11: ffffed100b9bd02c R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88805cde8158 R15: 0000000000000000
FS: 000055557841f500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ef63fff CR3: 000000005ab61000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
dvb_usbv2_generic_write+0x22/0x50 drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c:77
mxl111sf_ctrl_msg+0x15e/0x2c0 drivers/media/usb/dvb-usb-v2/mxl111sf.c:73
mxl111sf_write_reg+0xa6/0x180 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+0x493/0x50d0 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:813
__i2c_transfer+0x880/0x22b0 drivers/i2c/i2c-core-base.c:-1
i2c_transfer+0x25d/0x3a0 drivers/i2c/i2c-core-base.c:2333
i2cdev_ioctl_rdwr+0x3dc/0x6d0 drivers/i2c/i2c-dev.c:297
i2cdev_ioctl+0x610/0x7b0 drivers/i2c/i2c-dev.c:458
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa63759ce59
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:00007ffd1c171cc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa637815fa0 RCX: 00007fa63759ce59
RDX: 00002000000001c0 RSI: 0000000000000707 RDI: 0000000000000004
RBP: 00007fa637632d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa637815fac R14: 00007fa637815fa0 R15: 00007fa637815fa0
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:582 [inline]
RIP: 0010:__mutex_lock+0xe8/0xaf0 kernel/locking/mutex.c:747
Code: c0 40 61 c0 96 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 6c 09 00 00 83 3d f5 10 88 0c 00 75 21 48 8d 7b 60 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 05 e8 ec 32 9b f7 48 39 5b 60 0f 85 ef 08 00 00
RSP: 0018:ffffc900020af3a0 EFLAGS: 00010202
RAX: 0000000000000019 RBX: 0000000000000068 RCX: ffffffff96c06103
RDX: ffff8880779d8000 RSI: ffffffff8a8c2c20 RDI: 00000000000000c8
RBP: ffffc900020af4f8 R08: ffffffff86de1b82 R09: 1ffff1100b9bd02b
R10: dffffc0000000000 R11: ffffed100b9bd02c R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88805cde8158 R15: 0000000000000000
FS: 000055557841f500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe80ceb3e9c CR3: 000000005ab61000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: c0 40 61 c0 rolb $0xc0,0x61(%rax)
4: 96 xchg %eax,%esi
5: 48 c1 e8 03 shr $0x3,%rax
9: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax
e: 84 c0 test %al,%al
10: 0f 85 6c 09 00 00 jne 0x982
16: 83 3d f5 10 88 0c 00 cmpl $0x0,0xc8810f5(%rip) # 0xc881112
1d: 75 21 jne 0x40
1f: 48 8d 7b 60 lea 0x60(%rbx),%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 ec 32 9b f7 call 0xf79b3322
36: 48 39 5b 60 cmp %rbx,0x60(%rbx)
3a: 0f 85 ef 08 00 00 jne 0x92f