This is a note to let you know that I've just added the patch titled dm crypt: fix GFP flags passed to skcipher_request_alloc() to the 5.5-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: dm-crypt-fix-gfp-flags-passed-to-skcipher_request_alloc.patch and it can be found in the queue-5.5 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 9402e959014a18b4ebf7558733076875808dd66c Mon Sep 17 00:00:00 2001 From: Mikulas Patocka <mpatocka@xxxxxxxxxx> Date: Thu, 2 Jan 2020 08:23:32 -0500 Subject: dm crypt: fix GFP flags passed to skcipher_request_alloc() From: Mikulas Patocka <mpatocka@xxxxxxxxxx> 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@xxxxxxxxxxxxxxx # v5.4+ Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx> Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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; Patches currently in stable-queue which might be from mpatocka@xxxxxxxxxx are queue-5.5/dm-crypt-fix-gfp-flags-passed-to-skcipher_request_alloc.patch queue-5.5/dm-writecache-fix-incorrect-flush-sequence-when-doing-ssd-mode-commit.patch queue-5.5/dm-thin-fix-use-after-free-in-metadata_pre_commit_callback.patch