Commit 3308bdcc authored by Ondrej Kozina's avatar Ondrej Kozina Committed by Ben Hutchings

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

commit e2cffb5f upstream.

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: default avatarOndrej Kozina <okozina@redhat.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: default avatarBen Hutchings <ben@decadent.org.uk>
parent 607d8297
......@@ -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)
......
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