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rxrpc: Fix uninitialised variable in rxrpc_send_data()

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[ Upstream commit 7a310f8d7dfe2d92a1f31ddb5357bfdd97eed273 ]

Fix the uninitialised txb variable in rxrpc_send_data() by moving the code
that loads it above all the jumps to maybe_error, txb being stored back
into call->tx_pending right before the normal return.

Fixes: b0f571ecd7 ("rxrpc: Fix locking in rxrpc's sendmsg")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lists.infradead.org/pipermail/linux-afs/2024-October/008896.html
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Link: https://patch.msgid.link/20241001132702.3122709-3-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
David Howells 2024-10-01 14:26:59 +01:00 committed by Greg Kroah-Hartman
parent 997a981908
commit 97624520ad
1 changed files with 5 additions and 5 deletions
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10
net/rxrpc/sendmsg.c
View file

@ -303,6 +303,11 @@ static int rxrpc_send_data(struct rxrpc_sock *rx,
sk_clear_bit(SOCKWQ_ASYNC_NOSPACE, sk);
reload:
txb = call->tx_pending;
call->tx_pending = NULL;
if (txb)
rxrpc_see_txbuf(txb, rxrpc_txbuf_see_send_more);
ret = -EPIPE;
if (sk->sk_shutdown & SEND_SHUTDOWN)
goto maybe_error;
@ -329,11 +334,6 @@ static int rxrpc_send_data(struct rxrpc_sock *rx,
goto maybe_error;
}
txb = call->tx_pending;
call->tx_pending = NULL;
if (txb)
rxrpc_see_txbuf(txb, rxrpc_txbuf_see_send_more);
do {
if (!txb) {
size_t remain;