Patch "crypto: scompress - don't sleep with preemption disabled" has been added to the 4.13-stable tree

This is a note to let you know that I've just added the patch titled

crypto: scompress - don't sleep with preemption disabled

to the 4.13-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:
crypto-scompress-don-t-sleep-with-preemption-disabled.patch
and it can be found in the queue-4.13 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Ard Biesheuvel <[email protected]>
Date: Fri, 21 Jul 2017 16:42:36 +0100
Subject: crypto: scompress - don't sleep with preemption disabled

From: Ard Biesheuvel <[email protected]>

commit 3c08377262880afc1621ab9cb6dbe7df47a6033d upstream.

Due to the use of per-CPU buffers, scomp_acomp_comp_decomp() executes with preemption disabled, and so whether the CRYPTO_TFM_REQ_MAY_SLEEP flag is set is irrelevant, since we cannot sleep anyway. So disregard the flag, and use GFP_ATOMIC unconditionally.

---
 crypto/scompress.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

@@ -211,9 +211,7 @@ static int scomp_acomp_comp_decomp(struc
 					      scratch_dst, &req->dlen, *ctx);
 	if (!ret) {
 		if (!req->dst) {
-			req->dst = crypto_scomp_sg_alloc(req->dlen,
-				   req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
-				   GFP_KERNEL : GFP_ATOMIC);
+			req->dst = crypto_scomp_sg_alloc(req->dlen, GFP_ATOMIC);
 			if (!req->dst)
 				goto out;
 		}

Patches currently in stable-queue which might be from [email protected] are

queue-4.13/crypto-scompress-don-t-sleep-with-preemption-disabled.patch