diff options
| author | Thorsten Blum <thorsten.blum@linux.dev> | 2025-05-03 13:52:44 +0200 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2025-05-05 12:47:57 +0200 |
| commit | 7314166ee7592513c77cfbb8ff579f376039f9c4 (patch) | |
| tree | 3fedef06cc2ec6748298af8b4e9f76e080586659 | |
| parent | 5aaf6a8cc3305e1000417f6fac9d131c47db9117 (diff) | |
ovl: Replace offsetof() with struct_size() in ovl_stack_free()
Compared to offsetof(), struct_size() provides additional compile-time
checks for structs with flexible arrays (e.g., __must_be_array()).
No functional changes intended.
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
| -rw-r--r-- | fs/overlayfs/util.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c index 5d6b60d56c27..dcccb4b4a66c 100644 --- a/fs/overlayfs/util.c +++ b/fs/overlayfs/util.c @@ -15,6 +15,7 @@ #include <linux/uuid.h> #include <linux/namei.h> #include <linux/ratelimit.h> +#include <linux/overflow.h> #include "overlayfs.h" /* Get write access to upper mnt - may fail if upper sb was remounted ro */ @@ -145,9 +146,9 @@ void ovl_stack_free(struct ovl_path *stack, unsigned int n) struct ovl_entry *ovl_alloc_entry(unsigned int numlower) { - size_t size = offsetof(struct ovl_entry, __lowerstack[numlower]); - struct ovl_entry *oe = kzalloc(size, GFP_KERNEL); + struct ovl_entry *oe; + oe = kzalloc(struct_size(oe, __lowerstack, numlower), GFP_KERNEL); if (oe) oe->__numlower = numlower; |