syzbot


WARNING in hci_send_cmd

Status: upstream: reported on 2025/07/01 00:11
Reported-by: syzbot+64c99c10db12ab7c816f@syzkaller.appspotmail.com
First crash: 2d03h, last: 2d03h
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in hci_send_cmd bluetooth 8 258d 506d 0/29 auto-obsoleted due to no activity on 2025/01/25 05:20
upstream WARNING in hci_send_cmd (2) bluetooth 2 65d 126d 0/29 upstream: reported on 2025/02/26 06:18

Sample crash report:
Bluetooth: MGMT ver 1.22
------------[ cut here ]------------
WARNING: CPU: 0 PID: 14423 at kernel/workqueue.c:1441 __queue_work+0xe2d/0xfb0 kernel/workqueue.c:1441
Modules linked in:
CPU: 0 PID: 14423 Comm: syz.0.2020 Not tainted 6.1.142-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__queue_work+0xe2d/0xfb0 kernel/workqueue.c:1441
Code: e9 9d fc ff ff 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 0f 8c c7 fc ff ff 48 8b 3c 24 e8 5d 32 7f 00 e9 b9 fc ff ff e8 b3 b6 2d 00 <0f> 0b 48 83 c4 60 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 9d b6 2d 00
RSP: 0018:ffffc90004eaf788 EFLAGS: 00010083
RAX: ffffffff815320cd RBX: 0000000000010000 RCX: 0000000000080000
RDX: ffffc9001e203000 RSI: 0000000000008975 RDI: 0000000000008976
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1003a591ac
R10: ffffed1003a591ac R11: 1ffff11003a591ab R12: ffff888057921800
R13: ffff8880579219c0 R14: 0000000000000008 R15: 0000000000000c01
FS:  00007f235a55e6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa382d03fe8 CR3: 0000000077e15000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 queue_work_on+0x11d/0x1d0 kernel/workqueue.c:1548
 queue_work include/linux/workqueue.h:512 [inline]
 hci_send_cmd+0xb0/0x170 net/bluetooth/hci_core.c:3055
 set_link_security+0x583/0x710 net/bluetooth/mgmt.c:1913
 hci_mgmt_cmd+0x9c9/0xed0 net/bluetooth/hci_sock.c:1652
 hci_sock_sendmsg+0x6b8/0xe70 net/bluetooth/hci_sock.c:1772
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 sock_write_iter+0x2b5/0x3a0 net/socket.c:1143
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x44c/0x960 fs/read_write.c:584
 ksys_write+0x143/0x240 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f235978e929
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:00007f235a55e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f23599b5fa0 RCX: 00007f235978e929
RDX: 0000000000000007 RSI: 0000200000000000 RDI: 0000000000000009
RBP: 00007f2359810b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f23599b5fa0 R15: 00007ffeb022cc78
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/01 00:10 linux-6.1.y 7e69c33e4858 6e83b42d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_send_cmd
* Struck through repros no longer work on HEAD.