This is a note to let you know that I've just added the patch titled
tls: fix race between tx work scheduling and socket close
to the 6.7-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-fix-race-between-tx-work-scheduling-and-socket-c.patch
and it can be found in the queue-6.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 28a14bb87398b2631ac6e4c4606fc4323c4c884e
Author: Jakub Kicinski <kuba@xxxxxxxxxx>
Date: Tue Feb 6 17:18:20 2024 -0800
tls: fix race between tx work scheduling and socket close
[ Upstream commit e01e3934a1b2d122919f73bc6ddbe1cdafc4bbdb ]
Similarly to previous commit, the submitting thread (recvmsg/sendmsg)
may exit as soon as the async crypto handler calls complete().
Reorder scheduling the work before calling complete().
This seems more logical in the first place, as it's
the inverse order of what the submitting thread will do.
Reported-by: valis <sec@valis.email>
Fixes: a42055e8d2c3 ("net/tls: Add support for async encryption of records for performance")
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Reviewed-by: Simon Horman <horms@xxxxxxxxxx>
Reviewed-by: Sabrina Dubroca <sd@xxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 635305bebfef..9374a61cef00 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -447,7 +447,6 @@ static void tls_encrypt_done(void *data, int err)
struct tls_rec *rec = data;
struct scatterlist *sge;
struct sk_msg *msg_en;
- bool ready = false;
struct sock *sk;
msg_en = &rec->msg_encrypted;
@@ -483,19 +482,16 @@ static void tls_encrypt_done(void *data, int err)
/* If received record is at head of tx_list, schedule tx */
first_rec = list_first_entry(&ctx->tx_list,
struct tls_rec, list);
- if (rec == first_rec)
- ready = true;
+ if (rec == first_rec) {
+ /* Schedule the transmission */
+ if (!test_and_set_bit(BIT_TX_SCHEDULED,
+ &ctx->tx_bitmask))
+ schedule_delayed_work(&ctx->tx_work.work, 1);
+ }
}
if (atomic_dec_and_test(&ctx->encrypt_pending))
complete(&ctx->async_wait.completion);
-
- if (!ready)
- return;
-
- /* Schedule the transmission */
- if (!test_and_set_bit(BIT_TX_SCHEDULED, &ctx->tx_bitmask))
- schedule_delayed_work(&ctx->tx_work.work, 1);
}
static int tls_encrypt_async_wait(struct tls_sw_context_tx *ctx)
