The patch titled
ext3: reject filehandles referring to special files
has been added to the -mm tree. Its filename is
ext3-reject-filehandles-referring-to-special-files.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: ext3: reject filehandles referring to special files
From: Neil Brown <neilb@xxxxxxx>
Inodes earlier than the 'first' inode (e.g. journal, resize) should be
rejected early - except the root inode.
Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
fs/exportfs/expfs.c | 4 +++-
fs/ext3/super.c | 15 +++++++++++++++
include/linux/fs.h | 2 ++
3 files changed, 20 insertions(+), 1 deletion(-)
diff -puN fs/exportfs/expfs.c~ext3-reject-filehandles-referring-to-special-files fs/exportfs/expfs.c
--- a/fs/exportfs/expfs.c~ext3-reject-filehandles-referring-to-special-files
+++ a/fs/exportfs/expfs.c
@@ -392,7 +392,8 @@ out:
}
-static struct dentry *export_iget(struct super_block *sb, unsigned long ino, __u32 generation)
+struct dentry *export_iget(struct super_block *sb, unsigned long ino,
+ __u32 generation)
{
/* iget isn't really right if the inode is currently unallocated!!
@@ -434,6 +435,7 @@ static struct dentry *export_iget(struct
}
return result;
}
+EXPORT_SYMBOL_GPL(export_iget);
static struct dentry *get_object(struct super_block *sb, void *vobjp)
diff -puN fs/ext3/super.c~ext3-reject-filehandles-referring-to-special-files fs/ext3/super.c
--- a/fs/ext3/super.c~ext3-reject-filehandles-referring-to-special-files
+++ a/fs/ext3/super.c
@@ -554,6 +554,20 @@ static int ext3_show_options(struct seq_
return 0;
}
+
+static struct dentry *ext3_get_dentry(struct super_block *sb, void *vobjp)
+{
+ __u32 *objp = vobjp;
+ unsigned long ino = objp[0];
+ __u32 generation = objp[1];
+
+ if (ino != EXT3_ROOT_INO && ino < EXT3_FIRST_INO(sb))
+ return ERR_PTR(-ESTALE);
+
+ return export_iget(sb, ino, generation);
+}
+
+
#ifdef CONFIG_QUOTA
#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
#define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
@@ -622,6 +636,7 @@ static struct super_operations ext3_sops
static struct export_operations ext3_export_ops = {
.get_parent = ext3_get_parent,
+ .get_dentry = ext3_get_dentry,
};
enum {
diff -puN include/linux/fs.h~ext3-reject-filehandles-referring-to-special-files include/linux/fs.h
--- a/include/linux/fs.h~ext3-reject-filehandles-referring-to-special-files
+++ a/include/linux/fs.h
@@ -1325,6 +1325,8 @@ extern struct dentry *
find_exported_dentry(struct super_block *sb, void *obj, void *parent,
int (*acceptable)(void *context, struct dentry *de),
void *context);
+struct dentry *export_iget(struct super_block *sb, unsigned long ino,
+ __u32 generation);
struct file_system_type {
const char *name;
_
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
md-dm-reduce-stack-usage-with-stacked-block-devices.patch
-
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