net+crypto: Use vmalloc for zlib inflate buffers.

They are 64K and result in order-4 allocations, even with SLUB.

Therefore, just like we always have for the deflate buffers, use
vmalloc.

Reported-by: Martin Jackson <mjackson220.list@gmail.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 6 insertions, 8 deletions

diff --git a/crypto/deflate.c b/crypto/deflate.c
index b5ccae29be74..b0165ecad0c5 100644
--- a/crypto/deflate.c
+++ b/crypto/deflate.c
@@ -32,7 +32,6 @@
 #include <linux/interrupt.h>
 #include <linux/mm.h>
 #include <linux/net.h>
-#include <linux/slab.h>
 
 #define DEFLATE_DEF_LEVEL               Z_DEFAULT_COMPRESSION
 #define DEFLATE_DEF_WINBITS             11
@@ -73,7 +72,7 @@ static int deflate_decomp_init(struct deflate_ctx *ctx)
         int ret = 0;
         struct z_stream_s *stream = &ctx->decomp_stream;
 
-        stream->workspace = kzalloc(zlib_inflate_workspacesize(), GFP_KERNEL);
+        stream->workspace = vzalloc(zlib_inflate_workspacesize());
         if (!stream->workspace) {
                 ret = -ENOMEM;
                 goto out;
@@ -86,7 +85,7 @@ static int deflate_decomp_init(struct deflate_ctx *ctx)
 out:
         return ret;
 out_free:
-        kfree(stream->workspace);
+        vfree(stream->workspace);
         goto out;
 }
 
@@ -99,7 +98,7 @@ static void deflate_comp_exit(struct deflate_ctx *ctx)
 static void deflate_decomp_exit(struct deflate_ctx *ctx)
 {
         zlib_inflateEnd(&ctx->decomp_stream);
-        kfree(ctx->decomp_stream.workspace);
+        vfree(ctx->decomp_stream.workspace);
 }
 
 static int deflate_init(struct crypto_tfm *tfm)
diff --git a/crypto/zlib.c b/crypto/zlib.c
index d11d761a5e41..06b62e5cdcc7 100644
--- a/crypto/zlib.c
+++ b/crypto/zlib.c
@@ -29,7 +29,6 @@
 #include <linux/interrupt.h>
 #include <linux/mm.h>
 #include <linux/net.h>
-#include <linux/slab.h>
 
 #include <crypto/internal/compress.h>
 
@@ -60,7 +59,7 @@ static void zlib_decomp_exit(struct zlib_ctx *ctx)
 
         if (stream->workspace) {
                 zlib_inflateEnd(stream);
-                kfree(stream->workspace);
+                vfree(stream->workspace);
                 stream->workspace = NULL;
         }
 }
@@ -228,13 +227,13 @@ static int zlib_decompress_setup(struct crypto_pcomp *tfm, void *params,
                                  ? nla_get_u32(tb[ZLIB_DECOMP_WINDOWBITS])
                                  : DEF_WBITS;
 
-        stream->workspace = kzalloc(zlib_inflate_workspacesize(), GFP_KERNEL);
+        stream->workspace = vzalloc(zlib_inflate_workspacesize());
         if (!stream->workspace)
                 return -ENOMEM;
 
         ret = zlib_inflateInit2(stream, ctx->decomp_windowBits);
         if (ret != Z_OK) {
-                kfree(stream->workspace);
+                vfree(stream->workspace);
                 stream->workspace = NULL;
                 return -EINVAL;
         }