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AKwUvBwB6TNCpICDkgdkfDyv/k6VLewe0L/Xi7LQv48seiv+Dy2gZ3qPVHuX8MOiQcqZf5DDrP+u5txhEVRb3/6lzxA=@vger.kernel.org X-Gm-Message-State: AFq9FYIKxdTxO7XzF2zIoKHdQrep6GUxRD0o22AZMQWYMlyqx0fBlr+E dyaZ+HusKxFmy0bwvJ8IdFi4Zgq1OoixFnGBbp7pTIsB0KYVf4X+v/Scc4ubE/Sg4d1e4FGAwFx YgajZvSwH1g5EHmPq0QPFIOV4TSX+jFQn8akzDzDYOGGF5759kSvseygM/cg= Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1904:b0:4d6:92f4:d684 with SMTP id 5614622812f47-53cd2f31129mr2013438b6e.63.1792245692842; Sat, 17 Oct 2026 07:01:32 -0700 (PDT) Date: Sat, 17 Oct 2026 07:01:32 -0700 In-Reply-To: <694c9ee9.050a0220.35954c.0030.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ad37fbc.6814cce4.34c49f.0073.GAE@google.com> Subject: Re: [syzbot] [bluetooth?] WARNING in hci_connect_sco From: syzbot To: deaner92@yahoo.com, gservice341@gmail.com, hdanton@sina.com, johan.hedberg@gmail.com, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, luiz.dentz@gmail.com, marcel@holtmann.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 58161ead29e5 Merge tag 'drm-fixes-2026-10-17' of https://g.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=101f34e1580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4ccb65e03706547e dashboard link: https://syzkaller.appspot.com/bug?extid=5897b3c764f5989ea942 compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17ac9031580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5897b3c764f5989ea942@syzkaller.appspotmail.com ------------[ cut here ]------------ workqueue: cannot queue hci_conn_timeout on wq hci0 WARNING: kernel/workqueue.c:2353 at __queue_work+0xd93/0x10e0 kernel/workqueue.c:2352, CPU#0: syz-executor112/5621 Modules linked in: CPU: 0 UID: 0 PID: 5621 Comm: syz-executor112 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:__queue_work+0xdaf/0x10e0 kernel/workqueue.c:2352 Code: 49 81 c7 70 01 00 00 4c 8d 35 dd 07 ef 0f 48 89 f8 48 c1 e8 03 80 3c 18 00 74 05 e8 8b 37 ac 00 49 8b 75 18 4c 89 f7 4c 89 fa <67> 48 0f b9 3a 4c 89 e8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ef e8 RSP: 0018:ffffc900030a7af8 EFLAGS: 00010046 RAX: 1ffff1100a7cc94d RBX: dffffc0000000000 RCX: ffff888040b12580 RDX: ffff888013a00170 RSI: ffffffff8add09c0 RDI: ffffffff917d6ea0 RBP: 0000000000000000 R08: ffff888053e64a57 R09: 1ffff1100a7cc94a R10: dffffc0000000000 R11: ffffed100a7cc94b R12: 0000000000000008 R13: ffff888053e64a50 R14: ffffffff917d6ea0 R15: ffff888013a00170 FS: 00007f0105e7e6c0(0000) GS:ffff88808b0b4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555905b7708 CR3: 0000000034424000 CR4: 0000000000352ef0 Call Trace: queue_delayed_work_on+0x11a/0x1e0 kernel/workqueue.c:2669 hci_connect_sco+0xe9/0x390 net/bluetooth/hci_conn.c:1881 sco_connect net/bluetooth/sco.c:375 [inline] sco_sock_connect+0x45e/0xb10 net/bluetooth/sco.c:764 connect_socket net/socket.c:2141 [inline] __sys_connect_file net/socket.c:2166 [inline] __sys_connect+0x316/0x450 net/socket.c:2183 __do_sys_connect net/socket.c:2189 [inline] __se_sys_connect net/socket.c:2186 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2186 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f01096e299e Code: 08 0f 85 f5 e2 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 90 41 57 41 56 4d 89 c6 41 55 4d 89 cd 41 54 55 53 48 83 ec 08 RSP: 002b:00007f0105e7e0e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f0105e7e6c0 RCX: 00007f01096e299e RDX: 0000000000000008 RSI: 00007f0105e7e160 RDI: 0000000000000008 RBP: 000000000001e435 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008 R13: 000000000001e438 R14: 00007f0105e7e160 R15: 00007f0105e7e158 ---------------- Code disassembly (best guess): 0: 49 81 c7 70 01 00 00 add $0x170,%r15 7: 4c 8d 35 dd 07 ef 0f lea 0xfef07dd(%rip),%r14 # 0xfef07eb e: 48 89 f8 mov %rdi,%rax 11: 48 c1 e8 03 shr $0x3,%rax 15: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 19: 74 05 je 0x20 1b: e8 8b 37 ac 00 call 0xac37ab 20: 49 8b 75 18 mov 0x18(%r13),%rsi 24: 4c 89 f7 mov %r14,%rdi 27: 4c 89 fa mov %r15,%rdx * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 4c 89 e8 mov %r13,%rax 32: 48 c1 e8 03 shr $0x3,%rax 36: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 3a: 74 08 je 0x44 3c: 4c 89 ef mov %r13,%rdi 3f: e8 .byte 0xe8 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.