From 0787a93baa1aab9fd0cb8500105d11d3d3a58f7a Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 14 Dec 2025 03:32:45 -0500 Subject: [PATCH] sysfs(2): fs_index() argument is _not_ a pathname ... it's a filesystem type name. Signed-off-by: Al Viro --- fs/filesystems.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/fs/filesystems.c b/fs/filesystems.c index 95e5256821a53..0c7d2b7ac26c8 100644 --- a/fs/filesystems.c +++ b/fs/filesystems.c @@ -132,24 +132,21 @@ EXPORT_SYMBOL(unregister_filesystem); static int fs_index(const char __user * __name) { struct file_system_type * tmp; - struct filename *name; + char *name __free(kfree) = strndup_user(__name, PATH_MAX); int err, index; - name = getname(__name); - err = PTR_ERR(name); if (IS_ERR(name)) - return err; + return PTR_ERR(name); err = -EINVAL; read_lock(&file_systems_lock); for (tmp=file_systems, index=0 ; tmp ; tmp=tmp->next, index++) { - if (strcmp(tmp->name, name->name) == 0) { + if (strcmp(tmp->name, name) == 0) { err = index; break; } } read_unlock(&file_systems_lock); - putname(name); return err; } -- 2.47.3