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crypto: algif - avoid excessive use of socket buffer in skcipher 

On archs with PAGE_SIZE >= 64 KiB the function skcipher_alloc_sgl()
fails with -ENOMEM no matter what user space actually requested.
This is caused by the fact sock_kmalloc call inside the function tried
to allocate more memory than allowed by the default kernel socket buffer
size (kernel param net.core.optmem_max).

Signed-off-by: Ondrej Kozina <okozina@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ondrej Kozina 2014-08-25 11:49:54 +02:00 committed by Herbert Xu
parent ab81873974
commit e2cffb5f49
1 changed files with 1 additions and 1 deletions
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2
crypto/algif_skcipher.c
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@ -49,7 +49,7 @@ struct skcipher_ctx {
struct ablkcipher_request req;
};
#define MAX_SGL_ENTS ((PAGE_SIZE - sizeof(struct skcipher_sg_list)) / \
#define MAX_SGL_ENTS ((4096 - sizeof(struct skcipher_sg_list)) / \
sizeof(struct scatterlist) - 1)
static inline int skcipher_sndbuf(struct sock *sk)