6.6-stable review patch. If anyone has any objections, please let me know.
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From: Sabrina Dubroca sd@queasysnail.net
[ Upstream commit 10f41d0710fc81b7af93fa6106678d57b1ff24a7 ]
PEEK needs to leave decrypted records on the rx_list so that we can receive them later on, so it jumps back into the async code that queues the skb. Unfortunately that makes us skip the TLS_RECORD_TYPE_DATA check at the bottom of the main loop, so if two records of the same (non-DATA) type are queued, we end up merging them.
Add the same record type check, and make it unlikely to not penalize the async fastpath. Async decrypt only applies to data record, so this check is only needed for PEEK.
process_rx_list also has similar issues.
Fixes: 692d7b5d1f91 ("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/3df2eef4fdae720c55e69472b5bea668772b45a2.170800737... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/tls/tls_sw.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c index e1f8ff6e9a739..67c8323b7cd11 100644 --- a/net/tls/tls_sw.c +++ b/net/tls/tls_sw.c @@ -2064,6 +2064,8 @@ int tls_sw_recvmsg(struct sock *sk, decrypted += chunk; len -= chunk; __skb_queue_tail(&ctx->rx_list, skb); + if (unlikely(control != TLS_RECORD_TYPE_DATA)) + break; continue; }