Commit 230b8c1a authored May 12, 2014 by Zhang Zhen Committed by Theodore Ts'o May 12, 2014

ext4: avoid unneeded lookup when xattr name is invalid



In ext4_xattr_set_handle() we have checked the xattr name's length. So
we should also check it in ext4_xattr_get() to avoid unneeded lookup
caused by invalid name.

Signed-off-by: Zhang Zhen <zhenzhang.zhang@huawei.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

parent 1c8349a1

fs/ext4/xattr.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -369,6 +369,9 @@ ext4_xattr_get(struct inode inode, int name_index, const char name,
		{
		int error;

		if (strlen(name) > 255)
		return -ERANGE;

		down_read(&EXT4_I(inode)->xattr_sem);
		error = ext4_xattr_ibody_get(inode, name_index, name, buffer,
		buffer_size);