This is a note to let you know that I've just added the patch titled
ext4: add check for inodes_count overflow in new resize ioctl
to the 3.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ext4-add-check-for-inodes_count-overflow-in-new-resize-ioctl.patch
and it can be found in the queue-3.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3f8a6411fbada1fa482276591e037f3b1adcf55b Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@xxxxxxx>
Date: Sun, 21 Apr 2013 22:56:32 -0400
Subject: ext4: add check for inodes_count overflow in new resize ioctl
From: Theodore Ts'o <tytso@xxxxxxx>
commit 3f8a6411fbada1fa482276591e037f3b1adcf55b upstream.
Addresses-Red-Hat-Bugzilla: #913245
Reported-by: Eric Sandeen <sandeen@xxxxxxxxxx>
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
Reviewed-by: Carlos Maiolino <cmaiolino@xxxxxxxxxx>
Signed-off-by: Lingzhu Xiang <lxiang@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/ext4/resize.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -1882,6 +1882,10 @@ retry:
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 = num_desc_blocks(sb, n_group + 1);
Patches currently in stable-queue which might be from tytso@xxxxxxx are
queue-3.9/ext4-add-check-for-inodes_count-overflow-in-new-resize-ioctl.patch
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