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crypto: scompress - don't sleep with preemption disabled

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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.

Cc: <stable@vger.kernel.org> # v4.10+
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2017-07-21 16:42:36 +01:00 • committed by Herbert Xu
parent 9166c44358
commit 3c08377262
1 changed files with 1 additions and 3 deletions
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4
crypto/scompress.c
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@ -211,9 +211,7 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir)
scratch_dst, &req->dlen, *ctx); scratch_dst, &req->dlen, *ctx);
if (!ret) { if (!ret) {
if (!req->dst) { if (!req->dst) {
req->dst = crypto_scomp_sg_alloc(req->dlen, req->dst = crypto_scomp_sg_alloc(req->dlen, GFP_ATOMIC);
req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
GFP_KERNEL : GFP_ATOMIC);
if (!req->dst) if (!req->dst)
goto out; goto out;
} }