From: Hyunwoo Kim <imv4bel@gmail.com>
To: steffen.klassert@secunet.com, herbert@gondor.apana.org.au,
davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
pabeni@redhat.com, horms@kernel.org
Cc: netdev@vger.kernel.org, imv4bel@gmail.com
Subject: [PATCH] espintcp: Use disable_work_sync() instead of cancel_work_sync() in espintcp_close()
Date: Mon, 16 Feb 2026 18:43:26 +0900 [thread overview]
Message-ID: <aZLmvv51f5Iu9G7b@v4bel> (raw)
After cancel_work_sync() is called from espintcp_close(),
espintcp_tx_work() can still be scheduled from paths such as
the Delayed ACK handler or ksoftirqd.
As a result, the espintcp_tx_work() worker may dereference a
freed espintcp ctx or sk.
To prevent this race condition, cancel_work_sync() is
replaced with disable_work_sync().
Fixes: e27cca96cd68 ("xfrm: add espintcp (RFC 8229)")
Signed-off-by: Hyunwoo Kim <imv4bel@gmail.com>
---
net/xfrm/espintcp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/xfrm/espintcp.c b/net/xfrm/espintcp.c
index bf744ac9d5a7..8709df716e98 100644
--- a/net/xfrm/espintcp.c
+++ b/net/xfrm/espintcp.c
@@ -536,7 +536,7 @@ static void espintcp_close(struct sock *sk, long timeout)
sk->sk_prot = &tcp_prot;
barrier();
- cancel_work_sync(&ctx->work);
+ disable_work_sync(&ctx->work);
strp_done(&ctx->strp);
skb_queue_purge(&ctx->out_queue);
--
2.43.0
reply other threads:[~2026-02-16 9:43 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=aZLmvv51f5Iu9G7b@v4bel \
--to=imv4bel@gmail.com \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=herbert@gondor.apana.org.au \
--cc=horms@kernel.org \
--cc=kuba@kernel.org \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=steffen.klassert@secunet.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