syzbot


WARNING: locking bug in sco_conn_del (2)

Status: upstream: reported on 2024/07/04 16:13
Subsystems: bluetooth
[Documentation on labels]
Reported-by: syzbot+b6f83101e2618cad8952@syzkaller.appspotmail.com
First crash: 12d, last: 12d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [bluetooth?] WARNING: locking bug in sco_conn_del (2) 0 (1) 2024/07/04 16:13
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING: locking bug in sco_conn_del bluetooth 2 1007d 1016d 0/27 auto-closed as invalid on 2022/02/07 01:50

Sample crash report:
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: CPU: 1 PID: 5099 at kernel/locking/lockdep.c:232 hlock_class kernel/locking/lockdep.c:232 [inline]
WARNING: CPU: 1 PID: 5099 at kernel/locking/lockdep.c:232 check_wait_context kernel/locking/lockdep.c:4773 [inline]
WARNING: CPU: 1 PID: 5099 at kernel/locking/lockdep.c:232 __lock_acquire+0x573/0x1fd0 kernel/locking/lockdep.c:5087
Modules linked in:
CPU: 1 PID: 5099 Comm: syz-executor Not tainted 6.10.0-rc5-syzkaller-01115-g30972a4ea092 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:hlock_class kernel/locking/lockdep.c:232 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4773 [inline]
RIP: 0010:__lock_acquire+0x573/0x1fd0 kernel/locking/lockdep.c:5087
Code: 00 00 83 3d 6e 8d 3b 0e 00 75 23 90 48 c7 c7 e0 b9 ca 8b 48 c7 c6 80 bc ca 8b e8 98 e2 e5 ff 48 ba 00 00 00 00 00 fc ff df 90 <0f> 0b 90 90 90 31 db 48 81 c3 c4 00 00 00 48 89 d8 48 c1 e8 03 0f
RSP: 0018:ffffc900040a77b0 EFLAGS: 00010046
RAX: 97fa0832cfe68200 RBX: 0000000000000d48 RCX: ffff88802d3f8000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000000000f R08: ffffffff81585802 R09: 1ffff110172a519a
R10: dffffc0000000000 R11: ffffed10172a519b R12: 0000000000000001
R13: ffff88802d3f8000 R14: 000000000000000f R15: ffff88802d3f8b78
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020bf2000 CR3: 000000007fd84000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754
 lock_sock_nested+0x48/0x100 net/core/sock.c:3543
 lock_sock include/net/sock.h:1607 [inline]
 sco_conn_del+0x104/0x310 net/bluetooth/sco.c:203
 hci_disconn_cfm include/net/bluetooth/hci_core.h:1985 [inline]
 hci_conn_hash_flush+0xff/0x240 net/bluetooth/hci_conn.c:2584
 hci_dev_close_sync+0x911/0xf70 net/bluetooth/hci_sync.c:5062
 hci_dev_do_close net/bluetooth/hci_core.c:556 [inline]
 hci_unregister_dev+0x1db/0x4e0 net/bluetooth/hci_core.c:2760
 vhci_release+0x83/0xd0 drivers/bluetooth/hci_vhci.c:666
 __fput+0x406/0x8b0 fs/file_table.c:422
 task_work_run+0x24f/0x310 kernel/task_work.c:180
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xa27/0x27e0 kernel/exit.c:874
 do_group_exit+0x207/0x2c0 kernel/exit.c:1023
 __do_sys_exit_group kernel/exit.c:1034 [inline]
 __se_sys_exit_group kernel/exit.c:1032 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1032
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4b3c975b99
Code: Unable to access opcode bytes at 0x7f4b3c975b6f.
RSP: 002b:00007fff7905f008 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4b3c975b99
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000043
RBP: 00007f4b3c9d28f0 R08: 00007fff7905cda7 R09: 000000000001fc63
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 000000000001fc63 R14: 0000000000000000 R15: 00007fff7905f8c0
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/30 16:09 net-next 30972a4ea092 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING: locking bug in sco_conn_del
* Struck through repros no longer work on HEAD.