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: 5983 Comm: syz.0.25 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+0xf2/0xcc0 kernel/locking/mutex.c:747
Code: 0f b6 04 30 84 c0 0f 85 cd 0a 00 00 83 3d b5 48 9c 0c 00 75 2a 48 8d 7b 60 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 c3 6f 4e f7 48 39 5b 60 0f 85 30 0a 00 00 bf
RSP: 0018:ffffc900034c70e0 EFLAGS: 00010202
RAX: 0000000000000019 RBX: 0000000000000068 RCX: dffffc0000000000
RDX: ffff888024629e00 RSI: ffffffff8acadd60 RDI: 00000000000000c8
RBP: ffffc900034c7238 R08: ffffffff871badb6 R09: 000000000000001e
R10: dffffc0000000000 R11: ffffed100420c12c R12: 0000000000000000
R13: 1ffff92000698e2c R14: dffffc0000000000 R15: 0000000000000000
FS: 0000555572b8b500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d263fff CR3: 000000002dc2d000 CR4: 00000000003506e0
Call Trace:
<TASK>
dvb_usbv2_generic_write+0x26/0x50 drivers/media/usb/dvb-usb-v2/dvb_usb_urb.c:77
mxl111sf_ctrl_msg+0x162/0x2c0 drivers/media/usb/dvb-usb-v2/mxl111sf.c:73
mxl111sf_write_reg+0xaa/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+0x497/0x50d0 drivers/media/usb/dvb-usb-v2/mxl111sf-i2c.c:813
__i2c_transfer+0x884/0x20c0 drivers/i2c/i2c-core-base.c:-1
i2c_transfer+0x261/0x3a0 drivers/i2c/i2c-core-base.c:2328
i2c_transfer_buffer_flags+0x10e/0x1a0 drivers/i2c/i2c-core-base.c:2356
i2c_master_send include/linux/i2c.h:110 [inline]
i2cdev_write+0x8b/0x120 drivers/i2c/i2c-dev.c:175
do_loop_readv_writev fs/read_write.c:-1 [inline]
do_iter_write+0x4ea/0xc30 fs/read_write.c:862
vfs_writev fs/read_write.c:933 [inline]
do_writev+0x27f/0x480 fs/read_write.c:976
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7048b9ce59
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:00007fff40bccbb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f7048e15fa0 RCX: 00007f7048b9ce59
RDX: 0000000000000001 RSI: 0000200000000180 RDI: 0000000000000004
RBP: 00007f7048c32e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7048e15fac R14: 00007f7048e15fa0 R15: 00007f7048e15fa0
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:582 [inline]
RIP: 0010:__mutex_lock+0xf2/0xcc0 kernel/locking/mutex.c:747
Code: 0f b6 04 30 84 c0 0f 85 cd 0a 00 00 83 3d b5 48 9c 0c 00 75 2a 48 8d 7b 60 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 c3 6f 4e f7 48 39 5b 60 0f 85 30 0a 00 00 bf
RSP: 0018:ffffc900034c70e0 EFLAGS: 00010202
RAX: 0000000000000019 RBX: 0000000000000068 RCX: dffffc0000000000
RDX: ffff888024629e00 RSI: ffffffff8acadd60 RDI: 00000000000000c8
RBP: ffffc900034c7238 R08: ffffffff871badb6 R09: 000000000000001e
R10: dffffc0000000000 R11: ffffed100420c12c R12: 0000000000000000
R13: 1ffff92000698e2c R14: dffffc0000000000 R15: 0000000000000000
FS: 0000555572b8b500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d324008 CR3: 000000002dc2d000 CR4: 00000000003506f0
----------------
Code disassembly (best guess):
0: 0f b6 04 30 movzbl (%rax,%rsi,1),%eax
4: 84 c0 test %al,%al
6: 0f 85 cd 0a 00 00 jne 0xad9
c: 83 3d b5 48 9c 0c 00 cmpl $0x0,0xc9c48b5(%rip) # 0xc9c48c8
13: 75 2a jne 0x3f
15: 48 8d 7b 60 lea 0x60(%rbx),%rdi
19: 48 89 f8 mov %rdi,%rax
1c: 48 c1 e8 03 shr $0x3,%rax
20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx
27: fc ff df
* 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction
2e: 74 05 je 0x35
30: e8 c3 6f 4e f7 call 0xf74e6ff8
35: 48 39 5b 60 cmp %rbx,0x60(%rbx)
39: 0f 85 30 0a 00 00 jne 0xa6f
3f: bf .byte 0xbf