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crypto: scompress - free partially allocated scratch buffers on failure 

When allocating the per-CPU scratch buffers, we allocate the source
and destination buffers separately, but bail immediately if the second
allocation fails, without freeing the first one. Fix that.

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 16:42:37 +01:00 committed by Herbert Xu
parent 3c08377262
commit cc4d110ec8
1 changed files with 4 additions and 1 deletions
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5
crypto/scompress.c
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@ -125,8 +125,11 @@ static int crypto_scomp_alloc_all_scratches(void)
if (!scomp_src_scratches) if (!scomp_src_scratches)
return -ENOMEM; return -ENOMEM;
scomp_dst_scratches = crypto_scomp_alloc_scratches(); scomp_dst_scratches = crypto_scomp_alloc_scratches();
if (!scomp_dst_scratches) if (!scomp_dst_scratches) {
crypto_scomp_free_scratches(scomp_src_scratches);
scomp_src_scratches = NULL;
return -ENOMEM; return -ENOMEM;
}
} }
return 0; return 0;
} }