From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20130518021658.256264043@goodmis.org> Date: Fri, 17 May 2013 22:17:40 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Eric Sandeen , "Theodore Tso" , Carlos Maiolino Subject: [ 103/136 ] ext4: add check for inodes_count overflow in new resize ioctl References: <20130518021557.139113314@goodmis.org> Content-Disposition: inline; filename=0103-ext4-add-check-for-inodes_count-overflow-in-new-resi.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.6.11.4 stable review patch. If anyone has any objections, please let me know. ------------------ From: Theodore Ts'o [ Upstream commit 3f8a6411fbada1fa482276591e037f3b1adcf55b ] Addresses-Red-Hat-Bugzilla: #913245 Reported-by: Eric Sandeen Signed-off-by: "Theodore Ts'o" Reviewed-by: Carlos Maiolino Cc: stable@vger.kernel.org Signed-off-by: Steven Rostedt --- fs/ext4/resize.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index 14de511..744097d 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)) / -- 1.7.10.4