Oops: general protection fault, probably for non-canonical address 0xdffffc0000000067: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000338-0x000000000000033f]
CPU: 0 UID: 0 PID: 6803 Comm: syz.4.228 Not tainted 6.14.0-rc3-next-20250218-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__lock_acquire+0x6a/0x2100 kernel/locking/lockdep.c:5091
Code: b6 04 30 84 c0 0f 85 f8 16 00 00 45 31 f6 83 3d 2b c3 a0 0e 00 0f 84 c8 13 00 00 89 54 24 60 89 5c 24 38 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 58 6c 8c 00 48 be 00 00 00 00 00 fc
RSP: 0000:ffffc9001bf2f870 EFLAGS: 00010002
RAX: 0000000000000067 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000338
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff207b48f R12: ffff8880269cbc00
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000338
FS: 0000555555a9e500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c406239 CR3: 000000002816c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
__timer_delete_sync+0x148/0x310 kernel/time/timer.c:1644
del_timer_sync include/linux/timer.h:185 [inline]
h5_close+0x4b/0x170 drivers/bluetooth/hci_h5.c:257
hci_uart_tty_close+0x205/0x290 drivers/bluetooth/hci_ldisc.c:557
tty_ldisc_kill+0xa3/0x1a0 drivers/tty/tty_ldisc.c:613
tty_ldisc_release+0x1a1/0x200 drivers/tty/tty_ldisc.c:781
tty_release_struct+0x2b/0xe0 drivers/tty/tty_io.c:1690
tty_release+0xd06/0x12c0 drivers/tty/tty_io.c:1861
__fput+0x3e9/0x9f0 fs/file_table.c:464
task_work_run+0x24f/0x310 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f821a38d169
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:00007ffd04a09db8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f821a5a7ba0 RCX: 00007f821a38d169
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f821a5a7ba0 R08: 0000000000000000 R09: 0000000e04a0a0af
R10: 00007f821a5a7ac0 R11: 0000000000000246 R12: 0000000000030c39
R13: 00007ffd04a09eb0 R14: ffffffffffffffff R15: 00007ffd04a09ed0
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0x6a/0x2100 kernel/locking/lockdep.c:5091
Code: b6 04 30 84 c0 0f 85 f8 16 00 00 45 31 f6 83 3d 2b c3 a0 0e 00 0f 84 c8 13 00 00 89 54 24 60 89 5c 24 38 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 58 6c 8c 00 48 be 00 00 00 00 00 fc
RSP: 0000:ffffc9001bf2f870 EFLAGS: 00010002
RAX: 0000000000000067 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000338
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff207b48f R12: ffff8880269cbc00
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000338
FS: 0000555555a9e500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c406239 CR3: 000000002816c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: b6 04 mov $0x4,%dh
2: 30 84 c0 0f 85 f8 16 xor %al,0x16f8850f(%rax,%rax,8)
9: 00 00 add %al,(%rax)
b: 45 31 f6 xor %r14d,%r14d
e: 83 3d 2b c3 a0 0e 00 cmpl $0x0,0xea0c32b(%rip) # 0xea0c340
15: 0f 84 c8 13 00 00 je 0x13e3
1b: 89 54 24 60 mov %edx,0x60(%rsp)
1f: 89 5c 24 38 mov %ebx,0x38(%rsp)
23: 4c 89 f8 mov %r15,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 80 3c 30 00 cmpb $0x0,(%rax,%rsi,1) <-- trapping instruction
2e: 74 12 je 0x42
30: 4c 89 ff mov %r15,%rdi
33: e8 58 6c 8c 00 call 0x8c6c90
38: 48 rex.W
39: be 00 00 00 00 mov $0x0,%esi
3e: 00 fc add %bh,%ah