syzbot


WARNING in l2cap_do_send (2)

Status: upstream: reported syz repro on 2023/12/26 22:54
Subsystems: bluetooth
[Documentation on labels]
Reported-by: syzbot+d6cd076b385aefcb6b16@syzkaller.appspotmail.com
First crash: 119d, last: 105d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [bluetooth?] WARNING in l2cap_do_send (2) 2 (5) 2023/12/28 11:58
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in l2cap_do_send bluetooth 2 367d 442d 0/26 auto-obsoleted due to no activity on 2023/08/20 14:34
Last patch testing requests (4)
Created Duration User Patch Repo Result
2024/03/19 12:11 18m retest repro upstream report log
2024/01/09 11:17 18m retest repro upstream report log
2023/12/28 11:37 20m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master OK log
2023/12/27 11:50 15m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 2 PID: 6232 at kernel/workqueue.c:1722 __queue_work+0xdc6/0x11d0 kernel/workqueue.c:1721
Modules linked in:
CPU: 2 PID: 6232 Comm: syz-executor.2 Not tainted 6.7.0-rc7-syzkaller-00003-gfbafc3e621c3 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__queue_work+0xdc6/0x11d0 kernel/workqueue.c:1721
Code: 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 a3 92 87 00 8b 5b 2c 31 ff 83 e3 20 89 de e8 e4 a6 31 00 85 db 75 56 e8 6b ab 31 00 90 <0f> 0b 90 e9 ac f8 ff ff e8 5d ab 31 00 90 0f 0b 90 e9 5b f8 ff ff
RSP: 0018:ffffc90003bf7748 EFLAGS: 00010093
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8154b90c
RDX: ffff88801bf21280 RSI: ffffffff8154b915 RDI: 0000000000000005
RBP: 0000000000000200 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88803fe4cdf0
R13: 0000000000000000 R14: ffff8880374f3000 R15: ffff8880374f3000
FS:  000055555556e480(0000) GS:ffff88806b800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000400 CR3: 000000001d1ad000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 queue_work_on+0xed/0x110 kernel/workqueue.c:1831
 l2cap_do_send+0x318/0x470 net/bluetooth/l2cap_core.c:1015
 l2cap_chan_send+0xb7d/0x2ae0 net/bluetooth/l2cap_core.c:2726
 l2cap_sock_sendmsg+0x218/0x2e0 net/bluetooth/l2cap_sock.c:1154
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0xd5/0x180 net/socket.c:745
 ____sys_sendmsg+0x2ac/0x940 net/socket.c:2584
 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638
 __sys_sendmmsg+0x1a1/0x450 net/socket.c:2724
 __do_sys_sendmmsg net/socket.c:2753 [inline]
 __se_sys_sendmmsg net/socket.c:2750 [inline]
 __x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2750
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fa77e47cce9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc101fb238 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fa77e59bf80 RCX: 00007fa77e47cce9
RDX: 0000000000000735 RSI: 0000000020000b80 RDI: 0000000000000004
RBP: 00007fa77e4c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000024044840 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000bf7 R14: 00007fa77e59bf80 R15: 00007fa77e59bf80
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/12/26 11:14 upstream fbafc3e621c3 fb427a07 .config console log report syz [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in l2cap_do_send
* Struck through repros no longer work on HEAD.