Subject: [syzbot] [rds?] WARNING in rds_conn_connect_if_down

From: syzbot <[email-masked]>
Date: Tue, 11 Apr 2023 13:53:04 -0700

Hello,

syzbot found the following issue on:

HEAD commit:    b9881d9a761a Merge branch 'bonding-ns-validation-fixes'
git tree:       net
console output: https://syzkaller.appspot.com/x/log.txt?x=123c531dc80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d3500b143c204867
dashboard link: https://syzkaller.appspot.com/bug?extid=d4faee732755bba9838e
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/4b4a5a4a2f01/disk-b9881d9a.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/f3d2bf6e2e9e/vmlinux-b9881d9a.xz
kernel image: https://storage.googleapis.com/syzbot-assets/26469aa699ef/bzImage-b9881d9a.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email-masked]

------------[ cut here ]------------
WARNING: CPU: 1 PID: 21117 at net/rds/connection.c:933 rds_conn_connect_if_down+0x97/0xb0 net/rds/connection.c:933
Modules linked in:
CPU: 1 PID: 21117 Comm: syz-executor.3 Not tainted 6.3.0-rc5-syzkaller-00143-gb9881d9a761a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
RIP: 0010:rds_conn_connect_if_down+0x97/0xb0 net/rds/connection.c:933
Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 25 48 8b bb 90 00 00 00 5b 5d e9 be fa ff ff e8 49 f9 2c f8 <0f> 0b eb c6 e8 f0 05 7e f8 eb aa e8 49 06 7e f8 eb 80 e8 42 06 7e
RSP: 0018:ffffc900055d7910 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880526ba5f0 RCX: 0000000000000000
RDX: ffff888027cb9d40 RSI: ffffffff8955de77 RDI: 0000000000000001
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000000 R12: 00000000fffffff5
R13: 0000000000000008 R14: ffff88806fd2db00 R15: ffff88807644e4c0
FS:  00007f9b3b641700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002001e000 CR3: 0000000027523000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 rds_sendmsg+0x2366/0x31a0 net/rds/send.c:1319
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg+0xde/0x190 net/socket.c:747
 ____sys_sendmsg+0x71c/0x900 net/socket.c:2501
 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2555
 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2584
 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: 0033:0x7f9b3a88c169
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:00007f9b3b641168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f9b3a9abf80 RCX: 00007f9b3a88c169
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 00007f9b3a8e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe6c474d8f R14: 00007f9b3b641300 R15: 0000000000022000
 </TASK>

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