Message-ID: <bbb62529a1bcee734c1f7e993755e5757f7716ca.camel@oracle.com>
Date: Tue, 27 Feb 2024 22:41:10 +0000
From: Allison Henderson <allison.henderson@...cle.com>
To: "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "rds-devel@....oracle.com"
	<rds-devel@....oracle.com>,
        "syzbot+d4faee732755bba9838e@...kaller.appspotmail.com"
	<syzbot+d4faee732755bba9838e@...kaller.appspotmail.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Santosh
 Shilimkar <santosh.shilimkar@...cle.com>,
        "pabeni@...hat.com"
	<pabeni@...hat.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        "kuba@...nel.org"
	<kuba@...nel.org>,
        "syzkaller-bugs@...glegroups.com"
	<syzkaller-bugs@...glegroups.com>
Subject: Re: [syzbot] [rds?] WARNING in rds_conn_connect_if_down

I'll open an internal bug to track this one as well

On Tue, 2024-02-27 at 06:58 -0800, syzbot wrote:
> syzbot has found a reproducer for the following issue on:
> 
> HEAD commit:    25d434257464 Merge branch 'pcs-xpcs-cleanups'
> git tree:       net-next
> console+strace:
> https://urldefense.com/v3/__https://syzkaller.appspot.com/x/log.txt?x=11f0034a180000__;!!ACWV5N9M2RV99hQ!Iq2WfPLgQAxNX3WGPfZ2vZo8NvDf2KGDF7wNJIfWk8F2HZYpAewiikhTFuzAl-pW1GFS2sCceHF0oJ5iNVYuRrQ7VtyxsdI21zHnQ7yBtLek$
>  
> kernel config: 
> https://urldefense.com/v3/__https://syzkaller.appspot.com/x/.config?x=57c41f64f37f51c5__;!!ACWV5N9M2RV99hQ!Iq2WfPLgQAxNX3WGPfZ2vZo8NvDf2KGDF7wNJIfWk8F2HZYpAewiikhTFuzAl-pW1GFS2sCceHF0oJ5iNVYuRrQ7VtyxsdI21zHnQ8IBIvYV$
>  
> dashboard link:
> https://urldefense.com/v3/__https://syzkaller.appspot.com/bug?extid=d4faee732755bba9838e__;!!ACWV5N9M2RV99hQ!Iq2WfPLgQAxNX3WGPfZ2vZo8NvDf2KGDF7wNJIfWk8F2HZYpAewiikhTFuzAl-pW1GFS2sCceHF0oJ5iNVYuRrQ7VtyxsdI21zHnQ373Ydb0$
>  
> compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for
> Debian) 2.40
> syz repro:     
> https://urldefense.com/v3/__https://syzkaller.appspot.com/x/repro.syz?x=11cbd722180000__;!!ACWV5N9M2RV99hQ!Iq2WfPLgQAxNX3WGPfZ2vZo8NvDf2KGDF7wNJIfWk8F2HZYpAewiikhTFuzAl-pW1GFS2sCceHF0oJ5iNVYuRrQ7VtyxsdI21zHnQ4Ypu5_j$
>  
> C reproducer:  
> https://urldefense.com/v3/__https://syzkaller.appspot.com/x/repro.c?x=10ff934a180000__;!!ACWV5N9M2RV99hQ!Iq2WfPLgQAxNX3WGPfZ2vZo8NvDf2KGDF7wNJIfWk8F2HZYpAewiikhTFuzAl-pW1GFS2sCceHF0oJ5iNVYuRrQ7VtyxsdI21zHnQ0MrP5gm$
>  
> 
> Downloadable assets:
> disk image:
> https://urldefense.com/v3/__https://storage.googleapis.com/syzbot-assets/2731aa9fb143/disk-25d43425.raw.xz__;!!ACWV5N9M2RV99hQ!Iq2WfPLgQAxNX3WGPfZ2vZo8NvDf2KGDF7wNJIfWk8F2HZYpAewiikhTFuzAl-pW1GFS2sCceHF0oJ5iNVYuRrQ7VtyxsdI21zHnQxlxW9s3$
>  
> vmlinux:
> https://urldefense.com/v3/__https://storage.googleapis.com/syzbot-assets/d1daf5663559/vmlinux-25d43425.xz__;!!ACWV5N9M2RV99hQ!Iq2WfPLgQAxNX3WGPfZ2vZo8NvDf2KGDF7wNJIfWk8F2HZYpAewiikhTFuzAl-pW1GFS2sCceHF0oJ5iNVYuRrQ7VtyxsdI21zHnQ7aRfbY4$
>  
> kernel image:
> https://urldefense.com/v3/__https://storage.googleapis.com/syzbot-assets/798446e4189b/bzImage-25d43425.xz__;!!ACWV5N9M2RV99hQ!Iq2WfPLgQAxNX3WGPfZ2vZo8NvDf2KGDF7wNJIfWk8F2HZYpAewiikhTFuzAl-pW1GFS2sCceHF0oJ5iNVYuRrQ7VtyxsdI21zHnQ7W6CtAb$
>  
> 
> IMPORTANT: if you fix the issue, please add the following tag to the
> commit:
> Reported-by: syzbot+d4faee732755bba9838e@...kaller.appspotmail.com
> 
> ------------[ cut here ]------------
> WARNING: CPU: 0 PID: 5244 at net/rds/connection.c:931
> rds_conn_connect_if_down+0x95/0xb0 net/rds/connection.c:931
> Modules linked in:
> CPU: 0 PID: 5244 Comm: syz-executor403 Not tainted 6.8.0-rc5-
> syzkaller-01592-g25d434257464 #0
> Hardware name: Google Google Compute Engine/Google Compute Engine,
> BIOS Google 01/25/2024
> RIP: 0010:rds_conn_connect_if_down+0x95/0xb0 net/rds/connection.c:931
> Code: 00 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 2e c3
> 42 f7 49 8b 3e 5b 41 5e 41 5f e9 f1 fa ff ff e8 ac 49 e0 f6 90 <0f>
> 0b 90 eb cb 89 d9 80 e1 07 38 c1 7c a9 48 89 df e8 75 c2 42 f7
> RSP: 0018:ffffc900042cf8a0 EFLAGS: 00010293
> RAX: ffffffff8ab323c4 RBX: 0000000000000002 RCX: ffff888021100000
> RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
> RBP: ffffc900042cfad0 R08: ffffffff8ab3238b R09: ffffffff8ab44361
> R10: 0000000000000002 R11: ffff888021100000 R12: ffff8880746ee000
> R13: ffff88802e39a6c0 R14: ffff8880260f2000 R15: dffffc0000000000
> FS:  00007f8c89bff6c0(0000) GS:ffff8880b9400000(0000)
> knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 000000002069d000 CR3: 000000002989a000 CR4: 00000000003506f0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
>  <TASK>
>  rds_sendmsg+0x1409/0x2280 net/rds/send.c:1319
>  sock_sendmsg_nosec net/socket.c:730 [inline]
>  __sock_sendmsg+0x221/0x270 net/socket.c:745
>  ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584
>  ___sys_sendmsg net/socket.c:2638 [inline]
>  __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667
>  do_syscall_64+0xf9/0x240
>  entry_SYSCALL_64_after_hwframe+0x6f/0x77
> RIP: 0033:0x7f8c89c84519
> Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 1a 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:00007f8c89bff218 EFLAGS: 00000246 ORIG_RAX:
> 000000000000002e
> RAX: ffffffffffffffda RBX: 00007f8c89d0e428 RCX: 00007f8c89c84519
> RDX: 0000000000000000 RSI: 0000000020000800 RDI: 0000000000000003
> RBP: 00007f8c89d0e420 R08: 00007ffeca3c5797 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8c89d0e42c
> R13: 00007f8c89cdb4f4 R14: 732e79726f6d656d R15: 00007ffeca3c5798
>  </TASK>
> 
> 
> ---
> If you want syzbot to run the reproducer, reply with:
> #syz test: git://repo/address.git branch-or-commit-hash
> If you attach or paste a git patch, syzbot will apply it before
> testing.
> 

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