From 0ed2dd03b94b7b7f66e23f25073b5385d0416589 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Tue, 8 May 2018 16:08:53 -0700 Subject: treewide: Use struct_size() for devm_kmalloc() and friends Replaces open-coded struct size calculations with struct_size() for devm_*, f2fs_*, and sock_* allocations. Automatically generated (and manually adjusted) from the following Coccinelle script: // Direct reference to struct field. @@ identifier alloc =~ "devm_kmalloc|devm_kzalloc|sock_kmalloc|f2fs_kmalloc|f2fs_kzalloc"; expression HANDLE; expression GFP; identifier VAR, ELEMENT; expression COUNT; @@ - alloc(HANDLE, sizeof(*VAR) + COUNT * sizeof(*VAR->ELEMENT), GFP) + alloc(HANDLE, struct_size(VAR, ELEMENT, COUNT), GFP) // mr = kzalloc(sizeof(*mr) + m * sizeof(mr->map[0]), GFP_KERNEL); @@ identifier alloc =~ "devm_kmalloc|devm_kzalloc|sock_kmalloc|f2fs_kmalloc|f2fs_kzalloc"; expression HANDLE; expression GFP; identifier VAR, ELEMENT; expression COUNT; @@ - alloc(HANDLE, sizeof(*VAR) + COUNT * sizeof(VAR->ELEMENT[0]), GFP) + alloc(HANDLE, struct_size(VAR, ELEMENT, COUNT), GFP) // Same pattern, but can't trivially locate the trailing element name, // or variable name. @@ identifier alloc =~ "devm_kmalloc|devm_kzalloc|sock_kmalloc|f2fs_kmalloc|f2fs_kzalloc"; expression HANDLE; expression GFP; expression SOMETHING, COUNT, ELEMENT; @@ - alloc(HANDLE, sizeof(SOMETHING) + COUNT * sizeof(ELEMENT), GFP) + alloc(HANDLE, CHECKME_struct_size(&SOMETHING, ELEMENT, COUNT), GFP) Signed-off-by: Kees Cook --- crypto/af_alg.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'crypto') diff --git a/crypto/af_alg.c b/crypto/af_alg.c index 7846c0c..bcbf677 100644 --- a/crypto/af_alg.c +++ b/crypto/af_alg.c @@ -501,8 +501,8 @@ int af_alg_alloc_tsgl(struct sock *sk) sg = sgl->sg; if (!sg || sgl->cur >= MAX_SGL_ENTS) { - sgl = sock_kmalloc(sk, sizeof(*sgl) + - sizeof(sgl->sg[0]) * (MAX_SGL_ENTS + 1), + sgl = sock_kmalloc(sk, + struct_size(sgl, sg, (MAX_SGL_ENTS + 1)), GFP_KERNEL); if (!sgl) return -ENOMEM; -- cgit v1.1