syzbot


WARNING in l2cap_do_send

Status: auto-obsoleted due to no activity on 2023/08/20 14:34
Subsystems: bluetooth
[Documentation on labels]
Reported-by: syzbot+a4a0e2f4827c045b6ee8@syzkaller.appspotmail.com
First crash: 388d, last: 309d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] WARNING in l2cap_do_send 0 (1) 2023/02/06 09:57
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in l2cap_do_send (2) bluetooth syz 1 47d 61d 0/26 upstream: reported syz repro on 2023/12/26 22:54

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 16546 at kernel/workqueue.c:1445 __queue_work+0xd44/0x1120 kernel/workqueue.c:1444
Modules linked in:
CPU: 0 PID: 16546 Comm: syz-executor.3 Not tainted 6.3.0-rc7-syzkaller-00159-g6e79bd28ab0a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
RIP: 0010:__queue_work+0xd44/0x1120 kernel/workqueue.c:1444
Code: e0 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 94 29 81 00 8b 5b 2c 31 ff 83 e3 20 89 de e8 15 0d 30 00 85 db 75 42 e8 bc 10 30 00 <0f> 0b e9 3c f9 ff ff e8 b0 10 30 00 0f 0b e9 ce f8 ff ff e8 a4 10
RSP: 0018:ffffc9000384f750 EFLAGS: 00010012
RAX: 0000000000006195 RBX: 0000000000000000 RCX: ffffc9000d29d000
RDX: 0000000000040000 RSI: ffffffff8152dfc4 RDI: 0000000000000005
RBP: 0000000000000008 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888029b78d10
R13: 0000000000000000 R14: ffff8880499dd000 R15: ffff8880499dd000
FS:  00007fb4dcf2b700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f29ca5abf84 CR3: 00000000510b0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 queue_work_on+0xf2/0x110 kernel/workqueue.c:1552
 l2cap_do_send+0x318/0x480 net/bluetooth/l2cap_core.c:1015
 l2cap_chan_send+0xcaa/0x2a20 net/bluetooth/l2cap_core.c:2727
 l2cap_sock_sendmsg+0x220/0x300 net/bluetooth/l2cap_sock.c:1172
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg+0xde/0x190 net/socket.c:747
 ____sys_sendmsg+0x334/0x900 net/socket.c:2501
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2555
 __sys_sendmmsg+0x18f/0x460 net/socket.c:2641
 __do_sys_sendmmsg net/socket.c:2670 [inline]
 __se_sys_sendmmsg net/socket.c:2667 [inline]
 __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2667
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb4dc28c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb4dcf2b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fb4dc3abf80 RCX: 00007fb4dc28c169
RDX: 00000000ffffff80 RSI: 00000000200002c0 RDI: 0000000000000004
RBP: 00007fb4dc2e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020040040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe65971a5f R14: 00007fb4dcf2b300 R15: 0000000000022000
 </TASK>

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/04/22 14:34 net 6e79bd28ab0a 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in l2cap_do_send
2023/02/02 09:51 net-old 64466c407a73 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in l2cap_do_send
* Struck through repros no longer work on HEAD.