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crypto: deflate - Use struct_size to improve deflate_alloc_stream 

Use struct_size(), which provides additional compile-time checks for
structures with flexible array members (e.g., __must_be_array()), to
calculate the allocation size for a new 'deflate_stream'.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Thorsten Blum 2025-10-30 17:32:17 +01:00 committed by Herbert Xu
parent 9fc6290117
commit b6410c1e50
1 changed files with 2 additions and 1 deletions
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3
crypto/deflate.c
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@ -15,6 +15,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/overflow.h>
#include <linux/percpu.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>
@ -39,7 +40,7 @@ static void *deflate_alloc_stream(void)
DEFLATE_DEF_MEMLEVEL));
struct deflate_stream *ctx;
ctx = kvmalloc(sizeof(*ctx) + size, GFP_KERNEL);
ctx = kvmalloc(struct_size(ctx, workspace, size), GFP_KERNEL);
if (!ctx)
return ERR_PTR(-ENOMEM);