From: Sabrina Dubroca <sd@queasysnail.net>
To: netdev@vger.kernel.org
Cc: Sabrina Dubroca <sd@queasysnail.net>,
Dave Watson <davejwatson@fb.com>,
Jakub Kicinski <kuba@kernel.org>, Vakul Garg <vakul.garg@nxp.com>,
Boris Pismenny <borisp@nvidia.com>,
John Fastabend <john.fastabend@gmail.com>
Subject: [PATCH net 5/5] tls: don't decrypt the next record if it's of a different type
Date: Wed, 6 Sep 2023 19:08:35 +0200 [thread overview]
Message-ID: <be8519564777b3a40eeb63002041576f9009a733.1694018970.git.sd@queasysnail.net> (raw)
In-Reply-To: <cover.1694018970.git.sd@queasysnail.net>
If the next record is of a different type, we won't copy it to
userspace in this round, tls_record_content_type will stop us just
after decryption. Skip decryption until the next recvmsg() call.
This fixes a use-after-free when a data record is decrypted
asynchronously but doesn't fill the userspace buffer, and the next
record is non-data, for example in the bad_cmsg selftest.
Fixes: c0ab4732d4c6 ("net/tls: Do not use async crypto for non-data records")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
---
net/tls/tls_sw.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index f80a2ea1dd7e..86b835b15872 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -2010,6 +2010,9 @@ int tls_sw_recvmsg(struct sock *sk,
else
darg.async = false;
+ if (ctx->async_capable && control && tlm->control != control)
+ goto recv_end;
+
err = tls_rx_one_record(sk, msg, &darg);
if (err < 0) {
tls_err_abort(sk, -EBADMSG);
--
2.40.1
next prev parent reply other threads:[~2023-09-06 17:09 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-06 17:08 [PATCH net 0/5] tls: fix some issues with async encryption Sabrina Dubroca
2023-09-06 17:08 ` [PATCH net 1/5] net: tls: handle -EBUSY on async encrypt/decrypt requests Sabrina Dubroca
2023-09-07 1:50 ` Jakub Kicinski
2023-09-07 15:11 ` Simon Horman
2023-09-08 6:10 ` Herbert Xu
2023-09-08 15:55 ` Sabrina Dubroca
2023-09-08 21:26 ` Jakub Kicinski
2023-09-09 0:53 ` Herbert Xu
2023-09-12 4:43 ` Herbert Xu
2023-09-12 15:37 ` Sabrina Dubroca
2023-09-14 9:00 ` Herbert Xu
2023-09-06 17:08 ` [PATCH net 2/5] tls: fix use-after-free with partial reads and async decrypt Sabrina Dubroca
2023-09-07 2:05 ` Jakub Kicinski
2023-09-07 13:56 ` Sabrina Dubroca
2023-09-06 17:08 ` [PATCH net 3/5] tls: fix returned read length with async !zc decrypt Sabrina Dubroca
2023-09-06 17:08 ` [PATCH net 4/5] tls: fix race condition in async decryption of corrupted records Sabrina Dubroca
2023-09-06 17:08 ` Sabrina Dubroca [this message]
2023-09-07 3:47 ` [PATCH net 5/5] tls: don't decrypt the next record if it's of a different type Jakub Kicinski
2023-09-07 12:21 ` Sabrina Dubroca
2023-09-07 17:08 ` Jakub Kicinski
2023-09-08 6:06 ` Herbert Xu
2023-09-08 15:38 ` Sabrina Dubroca
2023-09-12 4:38 ` Herbert Xu
2023-09-13 13:25 ` Sabrina Dubroca
2023-09-14 9:45 ` Herbert Xu
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