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mount_setattr(2): don't mess with LOOKUP_EMPTY

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just use CLASS(filename_uflags) + filename_lookup()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2024-09-20 14:08:37 -04:00
parent 70772cafff
commit 57cd2072bd
1 changed files with 2 additions and 3 deletions
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5
fs/namespace.c
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@@ -4978,8 +4978,6 @@ SYSCALL_DEFINE5(mount_setattr, int, dfd, const char __user *, path,
lookup_flags &= ~LOOKUP_AUTOMOUNT;
if (flags & AT_SYMLINK_NOFOLLOW)
lookup_flags &= ~LOOKUP_FOLLOW;
if (flags & AT_EMPTY_PATH)
lookup_flags |= LOOKUP_EMPTY;
kattr = (struct mount_kattr) {
.lookup_flags = lookup_flags,
@@ -4992,7 +4990,8 @@ SYSCALL_DEFINE5(mount_setattr, int, dfd, const char __user *, path,
if (err <= 0)
return err;
err = user_path_at(dfd, path, kattr.lookup_flags, &target);
CLASS(filename_uflags, name)(path, flags);
err = filename_lookup(dfd, name, kattr.lookup_flags, &target, NULL);
if (!err) {
err = do_mount_setattr(&target, &kattr);
path_put(&target);