| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Sat, 29 Jan 2011 21:40:34 -0800
From: Manish Katiyar <mkatiyar@...il.com>
To: Andreas Dilger <adilger@...ger.ca>
Cc: "Theodore Ts'o" <tytso@....edu>, ext4 <linux-ext4@...r.kernel.org>,
mkatiyar@...il.com
Subject: Re: [PATCH] ext4: Fix missing iput for root inode in case of all
failed mount paths.
On Sun, Jan 16, 2011 at 10:05 AM, Manish Katiyar <mkatiyar@...il.com> wrote:
> On Sun, Jan 16, 2011 at 8:20 AM, Andreas Dilger <adilger@...ger.ca> wrote:
>> Why not just put the iput() at failed_mount4() instead of spread around the code?
>
> Thanks Andreas, Here is the updated patch.
>
> Signed-off-by: Manish Katiyar <mkatiyar@...il.com>
> ---
> fs/ext4/super.c | 5 +++--
> 1 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
> index cb10a06..8fa53e9 100644
> --- a/fs/ext4/super.c
> +++ b/fs/ext4/super.c
> @@ -3522,17 +3522,16 @@ no_journal:
> if (IS_ERR(root)) {
> ext4_msg(sb, KERN_ERR, "get root inode failed");
> ret = PTR_ERR(root);
> + root = NULL;
> goto failed_mount4;
> }
> if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
> - iput(root);
> ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck");
> goto failed_mount4;
> }
> sb->s_root = d_alloc_root(root);
> if (!sb->s_root) {
> ext4_msg(sb, KERN_ERR, "get root dentry failed");
> - iput(root);
> ret = -ENOMEM;
> goto failed_mount4;
> }
> @@ -3648,6 +3647,8 @@ cantfind_ext4:
> goto failed_mount;
>
> failed_mount4:
> + iput(root);
> + sb->s_root = NULL;
> ext4_msg(sb, KERN_ERR, "mount failed");
> destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq);
> failed_mount_wq:
> --
> 1.7.1
>
>
>
>>
>> Cheers, Andreas
>>
>> On 2011-01-16, at 0:30, Manish Katiyar <mkatiyar@...il.com> wrote:
>>
>>> Fix missing iput for root inode in case of all failed mount paths.
>>> Fixes bug#26752
>>>
>>> Signed-off-by: Manish Katiyar <mkatiyar@...il.com>
>>>
>>> ---
>>> fs/ext4/super.c | 8 +++++++-
>>> 1 files changed, 7 insertions(+), 1 deletions(-)
>>>
>>> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
>>> index cb10a06..9570fcc 100644
>>> --- a/fs/ext4/super.c
>>> +++ b/fs/ext4/super.c
>>> @@ -3587,6 +3587,7 @@ no_journal:
>>> if (err) {
>>> ext4_msg(sb, KERN_ERR, "failed to initialize system "
>>> "zone (%d)", err);
>>> + iput(root);
>>> goto failed_mount4;
>>> }
>>>
>>> @@ -3595,12 +3596,15 @@ no_journal:
>>> if (err) {
>>> ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)",
>>> err);
>>> + iput(root);
>>> goto failed_mount4;
>>> }
>>>
>>> err = ext4_register_li_request(sb, first_not_zeroed);
>>> - if (err)
>>> + if (err) {
>>> + iput(root);
>>> goto failed_mount4;
>>> + }
>>>
>>> sbi->s_kobj.kset = ext4_kset;
>>> init_completion(&sbi->s_kobj_unregister);
>>> @@ -3609,6 +3613,7 @@ no_journal:
>>> if (err) {
>>> ext4_mb_release(sb);
>>> ext4_ext_release(sb);
>>> + iput(root);
>>> goto failed_mount4;
>>> };
>>>
>>> @@ -3648,6 +3653,7 @@ cantfind_ext4:
>>> goto failed_mount;
>>>
>>> failed_mount4:
>>> + sb->s_root = NULL;
>>> ext4_msg(sb, KERN_ERR, "mount failed");
>>> destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq);
>>> failed_mount_wq:
Hi Ted,
Any feedback on this ?
--
Thanks -
Manish
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists