[PATCH 1/2] ARM: net: bpf_jit_32: fix kzalloc gfp/size mismatch.

[Nicolas Schichan]

Official prototype for kzalloc is:

void *kzalloc(size_t, gfp_t);

The ARM bpf_jit code was having the assumption that it was:

void *kzalloc(gfp_t, size);

This was resulting the use of some random GFP flags depending on the
size requested and some random overflows once the really needed size
was more than the value of GFP_KERNEL.

This bug was present since the original inclusion of bpf_jit for ARM
(ddecdfce: ARM: 7259/3: net: JIT compiler for packet filters).

Signed-off-by: Nicolas Schichan <nschichan at freebox.fr>
---
 arch/arm/net/bpf_jit_32.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/net/bpf_jit_32.c b/arch/arm/net/bpf_jit_32.c
index c641fb6..a64d349 100644
--- a/arch/arm/net/bpf_jit_32.c
+++ b/arch/arm/net/bpf_jit_32.c
@@ -845,7 +845,7 @@ void bpf_jit_compile(struct sk_filter *fp)
 	ctx.skf		= fp;
 	ctx.ret0_fp_idx = -1;
 
-	ctx.offsets = kzalloc(GFP_KERNEL, 4 * (ctx.skf->len + 1));
+	ctx.offsets = kzalloc(4 * (ctx.skf->len + 1), GFP_KERNEL);
 	if (ctx.offsets == NULL)
 		return;
 
@@ -864,7 +864,7 @@ void bpf_jit_compile(struct sk_filter *fp)
 
 	ctx.idx += ctx.imm_count;
 	if (ctx.imm_count) {
-		ctx.imms = kzalloc(GFP_KERNEL, 4 * ctx.imm_count);
+		ctx.imms = kzalloc(4 * ctx.imm_count, GFP_KERNEL);
 		if (ctx.imms == NULL)
 			goto out;
 	}
-- 
1.7.5.4