[PATCH] dcache: use kmalloc_flex() in __d_alloc
From: Thorsten Blum
Date: Fri Apr 17 2026 - 05:44:28 EST
Use kmalloc_flex() when allocating a new 'struct external_name' in
__d_alloc() to replace offsetof() and the open-coded size arithmetic,
and to keep the size type-safe.
Signed-off-by: Thorsten Blum <thorsten.blum@xxxxxxxxx>
---
fs/dcache.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/fs/dcache.c b/fs/dcache.c
index dbcbd0affb26..4568f9530166 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1753,10 +1753,10 @@ static struct dentry *__d_alloc(struct super_block *sb, const struct qstr *name)
name = &slash_name;
dname = dentry->d_shortname.string;
} else if (name->len > DNAME_INLINE_LEN-1) {
- size_t size = offsetof(struct external_name, name[1]);
- struct external_name *p = kmalloc(size + name->len,
- GFP_KERNEL_ACCOUNT |
- __GFP_RECLAIMABLE);
+ struct external_name *p;
+
+ p = kmalloc_flex(*p, name, name->len + 1,
+ GFP_KERNEL_ACCOUNT | __GFP_RECLAIMABLE);
if (!p) {
kmem_cache_free(dentry_cache, dentry);
return NULL;