Commit 5157da2c authored by Miklos Szeredi's avatar Miklos Szeredi

fuse: always allow query of st_dev

Fuse mounts without "allow_other" are off-limits to all non-owners.  Yet it
makes sense to allow querying st_dev on the root, since this value is
provided by the kernel, not the userspace filesystem.

Allow statx(2) with a zero request mask to succeed on a fuse mounts for all
users.
Reported-by: default avatarNikolaus Rath <Nikolaus@rath.org>
Signed-off-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
parent 614c026e
...@@ -1689,8 +1689,18 @@ static int fuse_getattr(const struct path *path, struct kstat *stat, ...@@ -1689,8 +1689,18 @@ static int fuse_getattr(const struct path *path, struct kstat *stat,
struct inode *inode = d_inode(path->dentry); struct inode *inode = d_inode(path->dentry);
struct fuse_conn *fc = get_fuse_conn(inode); struct fuse_conn *fc = get_fuse_conn(inode);
if (!fuse_allow_current_process(fc)) if (!fuse_allow_current_process(fc)) {
if (!request_mask) {
/*
* If user explicitly requested *nothing* then don't
* error out, but return st_dev only.
*/
stat->result_mask = 0;
stat->dev = inode->i_sb->s_dev;
return 0;
}
return -EACCES; return -EACCES;
}
return fuse_update_get_attr(inode, NULL, stat, request_mask, flags); return fuse_update_get_attr(inode, NULL, stat, request_mask, flags);
} }
......
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