Hello,
could you please add this patch (already landed in 3.18-rc1) to
following stable kernels:
3.17.x, 3.14.x, 3.12.x, 3.4.x, 3.2.x?
The bugfix allows usage of crypto API socket on archs with PAGE_SIZE >=
32 KiB (I have a typo in original changelog).
Some background for the bug (with reproducer and report from users)
- http://www.mail-archive.com/linux-crypto@xxxxxxxxxxxxxxx/msg11787.html
- http://bugzilla.redhat.com/show_bug.cgi?id=1160289
Thank you
Ondrej
-------------------
Upstream commit e2cffb5f493a8b431dc87124388ea59b79f0bccb
Author: Ondrej Kozina <okozina@xxxxxxxxxx>
Date: Mon Aug 25 11:49:54 2014 +0200
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@xxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
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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