linux-kernel - [syzbot] [net?] [afs?] WARNING in rxrpc_send

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Message-ID: <6757fb68.050a0220.2477f.005f.GAE@google.com>
Date: Tue, 10 Dec 2024 00:27:20 -0800
From: syzbot <syzbot+ff11be94dfcd7a5af8da@...kaller.appspotmail.com>
To: davem@...emloft.net, dhowells@...hat.com, edumazet@...gle.com, 
	horms@...nel.org, kuba@...nel.org, linux-afs@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, marc.dionne@...istor.com, 
	netdev@...r.kernel.org, pabeni@...hat.com, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [net?] [afs?] WARNING in rxrpc_send_data

Hello,

syzbot found the following issue on:

HEAD commit:    e58b4771af2b Merge branch 'vxlan-support-user-defined-rese..
git tree:       net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=16b9a8f8580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=1362a5aee630ff34
dashboard link: https://syzkaller.appspot.com/bug?extid=ff11be94dfcd7a5af8da
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14cb93e8580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15a3d4df980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b527c0c7acd8/disk-e58b4771.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/41720c9a36cc/vmlinux-e58b4771.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8888d773b743/bzImage-e58b4771.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ff11be94dfcd7a5af8da@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 5822 at net/rxrpc/sendmsg.c:296 rxrpc_alloc_txqueue net/rxrpc/sendmsg.c:296 [inline]
WARNING: CPU: 0 PID: 5822 at net/rxrpc/sendmsg.c:296 rxrpc_send_data+0x2969/0x2b30 net/rxrpc/sendmsg.c:390
Modules linked in:
CPU: 0 UID: 0 PID: 5822 Comm: syz-executor280 Not tainted 6.13.0-rc1-syzkaller-00332-ge58b4771af2b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:rxrpc_alloc_txqueue net/rxrpc/sendmsg.c:296 [inline]
RIP: 0010:rxrpc_send_data+0x2969/0x2b30 net/rxrpc/sendmsg.c:390
Code: 24 48 48 89 de e8 37 38 ab f6 4c 39 f3 b8 00 fe ff ff 41 bf fc ff ff ff 44 0f 44 f8 45 31 f6 e9 71 fd ff ff e8 38 33 ab f6 90 <0f> 0b 90 48 8b 7c 24 28 e8 4a d3 09 f7 e9 46 fd ff ff 89 d9 80 e1
RSP: 0018:ffffc90003d9f620 EFLAGS: 00010293
RAX: ffffffff8af43ee8 RBX: ffff88814e6b4e80 RCX: ffff88802b741e00
RDX: 0000000000000000 RSI: 00000000000000ff RDI: ffff88807d0ea440
RBP: ffffc90003d9f8d0 R08: ffff88807d0ea43f R09: 0000000000000000
R10: ffff88807d0ea340 R11: ffffed100fa1d488 R12: ffff88814e6b4e48
R13: 1ffff11029cd69cf R14: ffff88807d0ea000 R15: 0000000000000000
FS:  0000555559fc7380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f831d7fb0d0 CR3: 000000007f1c2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 rxrpc_do_sendmsg+0x1569/0x1910 net/rxrpc/sendmsg.c:763
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:726
 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2583
 ___sys_sendmsg net/socket.c:2637 [inline]
 __sys_sendmsg+0x269/0x350 net/socket.c:2669
 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: 0033:0x7f831d783ab9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffd37defc8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f831d783ab9
RDX: 0000000000008880 RSI: 0000000020000000 RDI: 0000000000000003
RBP: 00007f831d7cd0fd R08: 0000000000000000 R09: 0000000000000006
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f831d7d213c
R13: 00007f831d7cd082 R14: 0000000000000001 R15: 0000000000000001
 </TASK>


---
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