Commit 66ac9fe7 authored Apr 26, 2016 by David Sterba

btrfs: add check to sysfs handler of label



Add a sanity check for the fs_info as we will dereference it, similar to
what the 'store features' handler does.

Signed-off-by: David Sterba <dsterba@suse.com>

parent ee611138

fs/btrfs/sysfs.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -377,6 +377,9 @@ static ssize_t btrfs_label_store(struct kobject *kobj,
		struct btrfs_fs_info *fs_info = to_fs_info(kobj);
		size_t p_len;

		if (!fs_info)
		return -EPERM;

		if (fs_info->sb->s_flags & MS_RDONLY)
		return -EROFS;