[PATCH 5.5 143/367] dm crypt: fix GFP flags passed to skcipher_request_alloc()

Greg Kroah-Hartman
2020-02-10T13:03:34Z

From: Mikulas Patocka <mpatocka@redhat.com>

commit 9402e959014a18b4ebf7558733076875808dd66c upstream.

GFP_KERNEL is not supposed to be or'd with GFP_NOFS (the result is
equivalent to GFP_KERNEL). Also, we use GFP_NOIO instead of GFP_NOFS
because we don't want any I/O being submitted in the direct reclaim
path.

Fixes: 39d13a1ac41d ("dm crypt: reuse eboiv skcipher for IV generation")
Cc: stable@vger.kernel.org # v5.4+
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/md/dm-crypt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -717,7 +717,7 @@ static int crypt_iv_eboiv_gen(struct cry
struct crypto_wait wait;
int err;

- req = skcipher_request_alloc(any_tfm(cc), GFP_KERNEL | GFP_NOFS);
+ req = skcipher_request_alloc(any_tfm(cc), GFP_NOIO);
if (!req)
return -ENOMEM;