From: Jason Gunthorpe <jgg@ziepe.ca>
To: Leon Romanovsky <leon@kernel.org>
Cc: syzbot+d8f76778263ab65c2b21@syzkaller.appspotmail.com,
Edward Adam Davis <eadavis@qq.com>,
akpm@linux-foundation.org, arjan@linux.intel.com,
davem@davemloft.net, dsahern@kernel.org, edumazet@google.com,
hdanton@sina.com, horms@kernel.org, kuba@kernel.org,
kuniyu@google.com, linux-kernel@vger.kernel.org,
linux-rdma@vger.kernel.org, netdev@vger.kernel.org,
pabeni@redhat.com, syzkaller-bugs@googlegroups.com,
yanjun.zhu@linux.dev, zyjzyj2000@gmail.com
Subject: Re: [PATCH] RDMA/nldev: add mutual exclusion in nldev_dellink()
Date: Wed, 13 May 2026 20:46:55 -0300 [thread overview]
Message-ID: <20260513234655.GW7702@ziepe.ca> (raw)
In-Reply-To: <177869624862.2335447.16979087766093395765.b4-ty@kernel.org>
On Wed, May 13, 2026 at 02:17:28PM -0400, Leon Romanovsky wrote:
>
> On Thu, 07 May 2026 20:50:10 +0800, Edward Adam Davis wrote:
> > We must serialize calls to nldev_dellink() or risk a crash as syzbot
> > reported:
> >
> > Call Trace:
> > udp_tunnel_sock_release+0x6d/0x80 net/ipv4/udp_tunnel_core.c:197
> > rxe_release_udp_tunnel drivers/infiniband/sw/rxe/rxe_net.c:294 [inline]
> > rxe_sock_put drivers/infiniband/sw/rxe/rxe_net.c:639 [inline]
> > rxe_net_del+0xfb/0x290 drivers/infiniband/sw/rxe/rxe_net.c:660
> > rxe_dellink+0x15/0x20 drivers/infiniband/sw/rxe/rxe.c:254
> >
> > [...]
>
> Applied, thanks!
>
> [1/1] RDMA/nldev: add mutual exclusion in nldev_dellink()
> https://git.kernel.org/rdma/rdma/c/0b28000b64f40d
This seems like a rxe bug, I would have expected the lock to be inside
rxe to protect its racy implementation of rxe_net_del(), which looks
like it is possibly also triggered by NETDEV_UNREGISTER...
ie it should not change nldev_dellink().
Jason
next prev parent reply other threads:[~2026-05-13 23:46 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-23 15:01 [syzbot] [net?] general protection fault in kernel_sock_shutdown (4) syzbot
2026-04-23 17:41 ` Jakub Kicinski
2026-04-24 16:47 ` Arjan van de Ven
2026-04-24 18:08 ` Arjan van de Ven
2026-05-06 13:48 ` [syzbot] [rdma] " syzbot
2026-05-06 14:28 ` Zhu Yanjun
2026-05-06 15:19 ` Kuniyuki Iwashima
2026-05-07 3:52 ` syzbot
2026-05-07 12:50 ` [PATCH] RDMA/nldev: add mutual exclusion in nldev_dellink() Edward Adam Davis
2026-05-07 13:25 ` Zhu Yanjun
2026-05-07 13:40 ` Edward Adam Davis
2026-05-07 14:11 ` Zhu Yanjun
2026-05-13 18:17 ` Leon Romanovsky
2026-05-13 23:46 ` Jason Gunthorpe [this message]
2026-05-14 7:31 ` Edward Adam Davis
2026-05-14 11:50 ` Jason Gunthorpe
2026-05-14 13:58 ` David Ahern
2026-05-14 14:14 ` Jason Gunthorpe
2026-05-14 14:26 ` David Ahern
2026-05-14 15:46 ` Zhu Yanjun
2026-05-14 5:15 ` [syzbot] [rdma] general protection fault in kernel_sock_shutdown (4) Zhu Yanjun
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260513234655.GW7702@ziepe.ca \
--to=jgg@ziepe.ca \
--cc=akpm@linux-foundation.org \
--cc=arjan@linux.intel.com \
--cc=davem@davemloft.net \
--cc=dsahern@kernel.org \
--cc=eadavis@qq.com \
--cc=edumazet@google.com \
--cc=hdanton@sina.com \
--cc=horms@kernel.org \
--cc=kuba@kernel.org \
--cc=kuniyu@google.com \
--cc=leon@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-rdma@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=syzbot+d8f76778263ab65c2b21@syzkaller.appspotmail.com \
--cc=syzkaller-bugs@googlegroups.com \
--cc=yanjun.zhu@linux.dev \
--cc=zyjzyj2000@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox