[ 3.5.y.z extended stable ] Patch "ext4: add check for inodes_count overflow in new resize ioctl" has been added to staging queue
Luis Henriques
luis.henriques at canonical.com
Wed May 15 10:34:28 UTC 2013
This is a note to let you know that I have just added a patch titled
ext4: add check for inodes_count overflow in new resize ioctl
to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree
which can be found at:
http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Luis
------
>From 65d594ad7dbdf0df41400ef05db56c149b303786 Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso at mit.edu>
Date: Sun, 21 Apr 2013 22:56:32 -0400
Subject: [PATCH] ext4: add check for inodes_count overflow in new resize ioctl
commit 3f8a6411fbada1fa482276591e037f3b1adcf55b upstream.
Addresses-Red-Hat-Bugzilla: #913245
Reported-by: Eric Sandeen <sandeen at redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso at mit.edu>
Reviewed-by: Carlos Maiolino <cmaiolino at redhat.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
fs/ext4/resize.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 097a7b0..d0ba1a9 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -1680,6 +1680,10 @@ int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count)
return 0;
ext4_get_group_no_and_offset(sb, n_blocks_count - 1, &n_group, &offset);
+ if (n_group > (0xFFFFFFFFUL / EXT4_INODES_PER_GROUP(sb))) {
+ ext4_warning(sb, "resize would cause inodes_count overflow");
+ return -EINVAL;
+ }
ext4_get_group_no_and_offset(sb, o_blocks_count - 1, &o_group, &offset);
n_desc_blocks = (n_group + EXT4_DESC_PER_BLOCK(sb)) /
--
1.8.1.2
More information about the kernel-team
mailing list