ovl_fill_merge() effectively directly casts the buf pointer to an
ovl_readdir_data struct pointer, but the pointer actually points to the
dir_context struct contained therein.

So use container_of() instead.

Signed-off-by: David Howells <[email protected]>
---

 fs/overlayfs/readdir.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/overlayfs/readdir.c b/fs/overlayfs/readdir.c
index 910553f37aca..d142c2bf8f1e 100644
--- a/fs/overlayfs/readdir.c
+++ b/fs/overlayfs/readdir.c
@@ -181,7 +181,9 @@ static void ovl_cache_put(struct ovl_dir_file *od, struct 
dentry *dentry)
 static int ovl_fill_merge(void *buf, const char *name, int namelen,
                          loff_t offset, u64 ino, unsigned int d_type)
 {
-       struct ovl_readdir_data *rdd = buf;
+       struct dir_context *ctx = buf;
+       struct ovl_readdir_data *rdd =
+               container_of(ctx, struct ovl_readdir_data, ctx);
 
        rdd->count++;
        if (!rdd->is_merge)

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