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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: 692d7b5d1f ("tls: Fix recvmsg() to be able to peek across multiple records")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Link: https://lore.kernel.org/r/bd31449e43bd4b6ff546f5c51cf958c31c511deb.1708007371.git.sd@queasysnail.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sabrina Dubroca 2024-02-15 17:17:30 +01:00 committed by Greg Kroah-Hartman
parent ca89b4f503
commit 6756168add
1 changed files with 1 additions and 1 deletions
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2
net/tls/tls_sw.c
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@ -2044,7 +2044,7 @@ int tls_sw_recvmsg(struct sock *sk,
goto end;
copied = err;
if (len <= copied)
if (len <= copied || (copied && control != TLS_RECORD_TYPE_DATA))
goto end;
target = sock_rcvlowat(sk, flags & MSG_WAITALL, len);