The patch titled
ext2 reject file handles with bad inode numbers early
has been added to the -mm tree. Its filename is
ext2-reject-file-handles-with-bad-inode-numbers-early.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: ext2 reject file handles with bad inode numbers early
From: Neil Brown <neilb@xxxxxxx>
Prevent bad inode numbers from triggering errors in ext2_get_inode().
Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
fs/ext2/super.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff -puN fs/ext2/super.c~ext2-reject-file-handles-with-bad-inode-numbers-early fs/ext2/super.c
--- a/fs/ext2/super.c~ext2-reject-file-handles-with-bad-inode-numbers-early
+++ a/fs/ext2/super.c
@@ -251,6 +251,20 @@ static struct super_operations ext2_sops
#endif
};
+static struct dentry *ext2_get_dentry(struct super_block *sb, void *vobjp)
+{
+ __u32 *objp = vobjp;
+ unsigned long ino = objp[0];
+ __u32 generation = objp[1];
+
+ if (ino != EXT2_ROOT_INO && ino < EXT2_FIRST_INO(sb))
+ return ERR_PTR(-ESTALE);
+ if (ino > le32_to_cpu(EXT2_SB(sb)->s_es->s_inodes_count))
+ return ERR_PTR(-ESTALE);
+
+ return export_iget(sb, ino, generation);
+}
+
/* Yes, most of these are left as NULL!!
* A NULL value implies the default, which works with ext2-like file
* systems, but can be improved upon.
@@ -258,6 +272,7 @@ static struct super_operations ext2_sops
*/
static struct export_operations ext2_export_ops = {
.get_parent = ext2_get_parent,
+ .get_dentry = ext2_get_dentry,
};
static unsigned long get_sb_block(void **data)
_
Patches currently in -mm which might be from neilb@xxxxxxx are
ext3-avoid-triggering-ext3_error-on-bad-nfs-file-handle.patch
ext3-avoid-triggering-ext3_error-on-bad-nfs-file-handle-fix.patch
git-klibc.patch
ext3-reject-filehandles-referring-to-special-files.patch
ext2-reject-file-handles-with-bad-inode-numbers-early.patch
md-dm-reduce-stack-usage-with-stacked-block-devices.patch
-
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