[PATCH] avoid excessive use of socket buffer in skcipher
From: Ondrej Kozina <hidden>
Date: 2014-08-25 09:48:21
Subsystem:
crypto api, the rest · Maintainers:
Herbert Xu, "David S. Miller", Linus Torvalds
Possibly related (same subject, not in this thread)
- 2014-11-08 · Re: [PATCH] avoid excessive use of socket buffer in skcipher · Milan Broz <hidden>
- 2014-09-04 · Re: [PATCH] avoid excessive use of socket buffer in skcipher · Herbert Xu <herbert@gondor.apana.org.au>
- 2014-09-01 · Re: [PATCH] avoid excessive use of socket buffer in skcipher · Ondrej Kozina <hidden>
- 2014-09-01 · Re: [PATCH] avoid excessive use of socket buffer in skcipher · Ondrej Kozina <hidden>
- 2014-08-25 · [PATCH] avoid excessive use of socket buffer in skcipher · Ondrej Kozina <hidden>
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 <redacted> --- crypto/algif_skcipher.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c
index a19c027..83187f4 100644
--- a/crypto/algif_skcipher.c
+++ b/crypto/algif_skcipher.c@@ -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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1.9.3