From 49a068f82a1d30eb585d7804b05948376be6cf9a Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Mon, 22 Dec 2014 16:14:51 -0500 Subject: [PATCH] rpc: fix xdr_truncate_encode to handle buffer ending on page boundary MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit A struct xdr_stream at a page boundary might point to the end of one page or the beginning of the next, but xdr_truncate_encode isn't prepared to handle the former. This can cause corruption of NFSv4 READDIR replies in the case that a readdir entry that would have exceeded the client's dircount/maxcount limit would have ended exactly on a 4k page boundary. You're more likely to hit this case on large directories. Other xdr_truncate_encode callers are probably also affected. Reported-by: Holger Hoffstätte Tested-by: Holger Hoffstätte Fixes: 3e19ce762b53 "rpc: xdr_truncate_encode" Cc: stable@vger.kernel.org Signed-off-by: J. Bruce Fields --- Reading git-format-patch failed