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drbd: correctly handle failed crypto_alloc_hash

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crypto_alloc_hash returns an ERR_PTR(), not NULL.

Also reset peer_integrity_tfm to NULL, to not call crypto_free_hash()
on an errno in the cleanup path.

Reported-by: Insu Yun <[email protected]>

Signed-off-by: Philipp Reisner <[email protected]>
Signed-off-by: Lars Ellenberg <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Lars Ellenberg 2016-06-14 00:26:39 +02:00 • committed by Jens Axboe
commit 1b57e66384
2 changed files with 3 additions and 2 deletions
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3
drivers/block/drbd/drbd_receiver.c
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@ -3681,7 +3681,8 @@ static int receive_protocol(struct drbd_connection *connection, struct packet_in
*/
peer_integrity_tfm = crypto_alloc_ahash(integrity_alg, 0, CRYPTO_ALG_ASYNC);
if (!peer_integrity_tfm) {
if (IS_ERR(peer_integrity_tfm)) {
peer_integrity_tfm = NULL;
drbd_err(connection, "peer data-integrity-alg %s not supported\n",
integrity_alg);
goto disconnect;