[PATCH] lsm: align based on pointer length in lsm_fill_user_ctx()

Paul Moore paul at paul-moore.com
Thu Nov 2 01:53:38 UTC 2023


Using the size of a void pointer is much cleaner than
BITS_PER_LONG / 8.

Signed-off-by: Paul Moore <paul at paul-moore.com>
---
 security/security.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/security.c b/security/security.c
index 86f7a1995991..a808fd5eba6d 100644
--- a/security/security.c
+++ b/security/security.c
@@ -792,7 +792,7 @@ int lsm_fill_user_ctx(struct lsm_ctx __user *uctx, size_t *uctx_len,
 	size_t nctx_len;
 	int rc = 0;
 
-	nctx_len = ALIGN(struct_size(nctx, ctx, val_len), BITS_PER_LONG / 8);
+	nctx_len = ALIGN(struct_size(nctx, ctx, val_len), sizeof(void *));
 	if (nctx_len > *uctx_len) {
 		rc = -E2BIG;
 		goto out;
-- 
2.42.0



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