fuse: fix revalidation of attributes for permission check

fuse_invalidate_attr() now sets fi->inval_mask instead of fi->i_time, hence
we need to check the inval mask in fuse_permission() as well.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: 2f1e81965fd0 ("fuse: allow fine grained attr cache invaldation")

1 files changed, 3 insertions, 1 deletions

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 56931dfdcc46..dc4e83d8ace7 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1119,8 +1119,10 @@ static int fuse_permission(struct inode *inode, int mask)
         if (fc->default_permissions ||
             ((mask & MAY_EXEC) && S_ISREG(inode->i_mode))) {
                 struct fuse_inode *fi = get_fuse_inode(inode);
+                u32 perm_mask = STATX_MODE | STATX_UID | STATX_GID;
 
-                if (time_before64(fi->i_time, get_jiffies_64())) {
+                if (perm_mask & READ_ONCE(fi->inval_mask) ||
+                    time_before64(fi->i_time, get_jiffies_64())) {
                         refreshed = true;
 
                         err = fuse_perm_getattr(inode, mask);