This is a note to let you know that I've just added the patch titled
tls: stop recv() if initial process_rx_list gave us non-DATA
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tls-stop-recv-if-initial-process_rx_list-gave-us-non.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 1cf42821be21152e5b6e0f3847c439ffec22c3bb
Author: Sabrina Dubroca <sd@xxxxxxxxxxxxxxx>
Date: Thu Feb 15 17:17:30 2024 +0100
tls: stop recv() if initial process_rx_list gave us non-DATA
[ Upstream commit fdfbaec5923d9359698cbb286bc0deadbb717504 ]
If we have a non-DATA record on the rx_list and another record of the
same type still on the queue, we will end up merging them:
- process_rx_list copies the non-DATA record
- we start the loop and process the first available record since it's
of the same type
- we break out of the loop since the record was not DATA
Just check the record type and jump to the end in case process_rx_list
did some work.
Fixes: 692d7b5d1f91 ("tls: Fix recvmsg() to be able to peek across multiple records")
Signed-off-by: Sabrina Dubroca <sd@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/bd31449e43bd4b6ff546f5c51cf958c31c511deb.1708007371.git.sd@xxxxxxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index fb7428f222a8f..910da98d6bfb3 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -1780,7 +1780,7 @@ int tls_sw_recvmsg(struct sock *sk,
}
copied = err;
- if (len <= copied)
+ if (len <= copied || (copied && control != TLS_RECORD_TYPE_DATA))
goto end;
target = sock_rcvlowat(sk, flags & MSG_WAITALL, len);
