Commit fd912087 authored May 12, 2019 by Al Viro

legacy_get_tree(): pass fc->user_ns to mount_capable()



guaranteed to be equal to current_user_ns() here - it has not
been changed since alloc_fs_context() (nothing in legacy
methods changes it) and since we don't have SB_SUBMOUNT,
that must've been FS_CONTEXT_FOR_MOUNT.  And in that case
we have fc->user_ns set to fc->cred->user_ns, i.e.
current_cred()->user_ns, i.e. current_user_ns()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

parent 2527b284

fs/fs_context.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -663,7 +663,7 @@ static int legacy_get_tree(struct fs_context *fc)
		struct dentry *root;

		if (!(fc->sb_flags & (SB_KERNMOUNT\|SB_SUBMOUNT))) {
		if (!mount_capable(fc->fs_type, current_user_ns()))
		if (!mount_capable(fc->fs_type, fc->user_ns))
		return -EPERM;
		}