[dm-devel] [PATCH] dm-crypt: fix GFP flags

[Mikulas Patocka]

GFP_KERNEL is not supposed to be ored 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.

Signed-off-by: Mikulas Patocka <mpatocka at redhat.com>
Cc: stable at vger.kernel.org	# v5.4+

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

Index: linux-2.6/drivers/md/dm-crypt.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-crypt.c	2020-01-02 14:16:21.000000000 +0100
+++ linux-2.6/drivers/md/dm-crypt.c	2020-01-02 14:16:21.000000000 +0100
@@ -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;