From: Evgeniy Ivanov <lolkaantimat@gmail.com>
Date: Mon, 29 Aug 2011 19:36:48 +0000 (+0400)
Subject: Fix ext2 symlink bug.
X-Git-Tag: v3.2.0~329
X-Git-Url: http://zhaoyanbai.com/repos//%22http:/%22%29?a=commitdiff_plain;h=4806f7c308ebdc14fa650ff232ccaa33756fd73f;p=minix.git

Fix ext2 symlink bug.

rip->i_size is a target length without trailing '\0'.

Reported by Ben Gras.
---

diff --git a/servers/ext2/link.c b/servers/ext2/link.c
index 34d67db54..6d14a77e4 100644
--- a/servers/ext2/link.c
+++ b/servers/ext2/link.c
@@ -195,7 +195,7 @@ PUBLIC int fs_rdlink()
   if( (rip = get_inode(fs_dev, (ino_t) fs_m_in.REQ_INODE_NR)) == NULL)
 	  return(EINVAL);
 
-  if (rip->i_size > MAX_FAST_SYMLINK_LENGTH) {
+  if (rip->i_size >= MAX_FAST_SYMLINK_LENGTH) {
   /* normal symlink */
 	if ((b = read_map(rip, (off_t) 0)) == NO_BLOCK) {
 		r = EIO;
diff --git a/servers/ext2/path.c b/servers/ext2/path.c
index e87bf8736..6b44433d9 100644
--- a/servers/ext2/path.c
+++ b/servers/ext2/path.c
@@ -305,7 +305,7 @@ char *suffix;			/* current remaining path. Has to point in the
 
   llen = (size_t) rip->i_size;
 
-  if (llen > MAX_FAST_SYMLINK_LENGTH) {
+  if (llen >= MAX_FAST_SYMLINK_LENGTH) {
 	/* normal symlink */
 	if ((blink = read_map(rip, (off_t) 0)) == NO_BLOCK)
 		return(EIO);
@@ -358,7 +358,7 @@ char *suffix;			/* current remaining path. Has to point in the
   /* Everything is set, now copy the expanded link to user_path */
   memmove(user_path, sp, llen);
 
-  if (llen > MAX_FAST_SYMLINK_LENGTH)
+  if (llen >= MAX_FAST_SYMLINK_LENGTH)
 	put_block(bp, DIRECTORY_BLOCK);
 
   return(OK);