Re: [syzbot] [net?] [afs?] WARNING in rxrpc_send_data

[syzbot <syzbot+ff11be94dfcd7a5af8da@syzkaller.appspotmail.com>]

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
WARNING in rxrpc_send_data

------------[ cut here ]------------
WARNING: CPU: 0 PID: 6653 at net/rxrpc/sendmsg.c:296 rxrpc_alloc_txqueue net/rxrpc/sendmsg.c:296 [inline]
WARNING: CPU: 0 PID: 6653 at net/rxrpc/sendmsg.c:296 rxrpc_send_data+0x2969/0x2b30 net/rxrpc/sendmsg.c:390
Modules linked in:
CPU: 0 UID: 0 PID: 6653 Comm: syz.0.16 Not tainted 6.13.0-rc1-syzkaller-00417-gf3674384709b-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
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 97 35 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 98 30 ab f6 90 <0f> 0b 90 48 8b 7c 24 28 e8 aa d0 09 f7 e9 46 fd ff ff 89 d9 80 e1
RSP: 0018:ffffc90003d4f3a0 EFLAGS: 00010293
RAX: ffffffff8af44188 RBX: ffff88805a8bce80 RCX: ffff8880263e8000
RDX: 0000000000000000 RSI: 00000000000000ff RDI: ffff888034486440
RBP: ffffc90003d4f650 R08: ffff88803448643f R09: 0000000000000000
R10: ffff888034486340 R11: ffffed1006890c88 R12: ffff88805a8bce48
R13: 1ffff1100b5179cf R14: ffff888034486000 R15: 0000000000000000
FS:  00007fc905bbc6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559e43303950 CR3: 0000000025e2a000 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_sendmmsg+0x36a/0x720 net/socket.c:2726
 __do_sys_sendmmsg net/socket.c:2753 [inline]
 __se_sys_sendmmsg net/socket.c:2750 [inline]
 __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2750
 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: 0033:0x7fc904d7ff19
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:00007fc905bbc058 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fc904f45fa0 RCX: 00007fc904d7ff19
RDX: 0000000000000001 RSI: 0000000020005c00 RDI: 0000000000000003
RBP: 00007fc904df3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc904f45fa0 R15: 00007ffcacaf6308
 </TASK>


Tested on:

commit:         f3674384 Merge branch 'net-smc-two-features-for-smc-r'
git tree:       net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=17821be8580000
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
patch:          https://syzkaller.appspot.com/x/patch.diff?x=17ec1be8580000