Oops: general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]
CPU: 0 UID: 0 PID: 9180 Comm: syz.0.645 Not tainted 6.14.0-rc2-syzkaller-00056-gab68d7eb7b1a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:564 [inline]
RIP: 0010:__mutex_lock+0x151/0xb10 kernel/locking/mutex.c:730
Code: d0 7c 08 84 d2 0f 85 71 07 00 00 8b 35 28 ec 39 0f 85 f6 75 29 48 8d 7b 60 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 59 07 00 00 48 3b 5b 60 0f 85 e7 01 00 00 bf 01
RSP: 0018:ffffc900047cfa80 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000010 RCX: 1ffffffff3503f14
RDX: 000000000000000e RSI: 0000000000000000 RDI: 0000000000000070
RBP: ffffc900047cfbc0 R08: ffffffff8a548b77 R09: 0000000000000006
R10: ffffc900047cfbd8 R11: 0000000000000002 R12: dffffc0000000000
R13: 0000000000000002 R14: 0000000000000000 R15: ffffc900047cfb00
FS: 00007f1c71cb96c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1c71c97f98 CR3: 0000000028d7a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
hci_devcd_register+0x47/0x170 net/bluetooth/coredump.c:415
force_devcd_write+0x175/0x350 drivers/bluetooth/hci_vhci.c:346
full_proxy_write+0x13c/0x200 fs/debugfs/file.c:398
vfs_write+0x24c/0x1150 fs/read_write.c:677
ksys_write+0x12b/0x250 fs/read_write.c:731
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c70d8cde9
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:00007f1c71cb9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f1c70fa5fa0 RCX: 00007f1c70d8cde9
RDX: 000000000000000e RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007f1c70e0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1c70fa5fa0 R15: 00007ffcd8dff3e8
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:564 [inline]
RIP: 0010:__mutex_lock+0x151/0xb10 kernel/locking/mutex.c:730
Code: d0 7c 08 84 d2 0f 85 71 07 00 00 8b 35 28 ec 39 0f 85 f6 75 29 48 8d 7b 60 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 59 07 00 00 48 3b 5b 60 0f 85 e7 01 00 00 bf 01
RSP: 0018:ffffc900047cfa80 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000010 RCX: 1ffffffff3503f14
RDX: 000000000000000e RSI: 0000000000000000 RDI: 0000000000000070
RBP: ffffc900047cfbc0 R08: ffffffff8a548b77 R09: 0000000000000006
R10: ffffc900047cfbd8 R11: 0000000000000002 R12: dffffc0000000000
R13: 0000000000000002 R14: 0000000000000000 R15: ffffc900047cfb00
FS: 00007f1c71cb96c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00003ffffffffec0 CR3: 0000000028d7a000 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 71 07 test %esi,0x7(%rcx)
9: 00 00 add %al,(%rax)
b: 8b 35 28 ec 39 0f mov 0xf39ec28(%rip),%esi # 0xf39ec39
11: 85 f6 test %esi,%esi
13: 75 29 jne 0x3e
15: 48 8d 7b 60 lea 0x60(%rbx),%rdi
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
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 59 07 00 00 jne 0x78d
34: 48 3b 5b 60 cmp 0x60(%rbx),%rbx
38: 0f 85 e7 01 00 00 jne 0x225
3e: bf .byte 0xbf
3f: 01 .byte 0x1