From: Charles Manning <cdhmanning@gmail.com>
Date: Thu, 21 May 2015 05:27:01 +0000 (+1200)
Subject: yaffs: Fix yaffs_readdir when dereferencing a symlink
X-Git-Tag: aleph1-release~30
X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=commitdiff_plain;h=c15797a48b5f133c37e9399546165525eebddc1c

yaffs: Fix yaffs_readdir when dereferencing a symlink

If the directory is a symlink then follow the symlink.

eg
yaffs_mount("/nand/");
yaffs_symlink("x", "/nand/sym");
yaffs_mkdir("/nand/x",0666);

After that:

yaffs_opendir("/nand/sym/") works, but opendir("/nand/sym") fails because the
symlink itself is found. Fix by dereferencing the symlink in yaffs_opendir().

Thanks to Trent Lillehaugen for finding that.

Signed-off-by: Charles Manning <cdhmanning@gmail.com>
---

diff --git a/direct/yaffsfs.c b/direct/yaffsfs.c
index dedd76c..cdde7ab 100644
--- a/direct/yaffsfs.c
+++ b/direct/yaffsfs.c
@@ -3428,6 +3428,7 @@ static yaffs_DIR *yaffsfs_opendir_reldir_no_lock(struct yaffs_obj *reldir,
 	}
 
 	obj = yaffsfs_FindObject(reldir, dirname, 0, 1, NULL, &notDir, &loop);
+	obj = yaffsfs_FollowLink(obj, 0, &loop);
 
 	if (!obj && notDir)
 		yaffsfs_SetError(-ENOTDIR);