[PATCH 8/14] HPFS: Restrict uid and gid to 16-bit values

[Mikulas Patocka]

Restrict uid and gid to 16-bit values.

HPFS stores only 2 bytes in the EAs.

Signed-off-by: Mikulas Patocka <mikulas@xxxxxxxxxxxxxxxxxxxxxxxx>

---
 fs/hpfs/inode.c |    4 ++++
 1 file changed, 4 insertions(+)

Index: linux-2.6.39-rc5-fast/fs/hpfs/inode.c
===================================================================
--- linux-2.6.39-rc5-fast.orig/fs/hpfs/inode.c	2011-05-05 01:02:49.000000000 +0200
+++ linux-2.6.39-rc5-fast/fs/hpfs/inode.c	2011-05-05 01:02:53.000000000 +0200
@@ -261,6 +261,10 @@ int hpfs_setattr(struct dentry *dentry, 
 	hpfs_lock(inode->i_sb);
 	if (inode->i_ino == hpfs_sb(inode->i_sb)->sb_root)
 		goto out_unlock;
+	if ((attr->ia_valid & ATTR_UID) && attr->ia_uid >= 0x10000)
+		goto out_unlock;
+	if ((attr->ia_valid & ATTR_GID) && attr->ia_gid >= 0x10000)
+		goto out_unlock;
 	if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size)
 		goto out_unlock;
 
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