linux-kernel - Re: [PATCH 1/3] fs/ntfs3: Fix insertion of attr in ni_ins_attr

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20210909123628.m5agndj35sesdurv@kari-VirtualBox>
Date:   Thu, 9 Sep 2021 15:36:28 +0300
From:   Kari Argillander <kari.argillander@...il.com>
To:     Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Cc:     ntfs3@...ts.linux.dev, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 1/3] fs/ntfs3: Fix insertion of attr in ni_ins_attr_ext

On Thu, Sep 09, 2021 at 01:57:59PM +0300, Konstantin Komarov wrote:
> Do not try to insert attribute if there is no room in record.
> 
> Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
> ---
>  fs/ntfs3/frecord.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c
> index 938b12d56ca6..5dd7b7a7c5e0 100644
> --- a/fs/ntfs3/frecord.c
> +++ b/fs/ntfs3/frecord.c
> @@ -956,6 +956,10 @@ static int ni_ins_attr_ext(struct ntfs_inode *ni, struct ATTR_LIST_ENTRY *le,
>  			continue;
>  		}
>  
> +		/* Do not try to insert this attribute if there is no room in record. */

Multiline comment as this gets very long.

> +		if (le32_to_cpu(mi->mrec->used) + asize > sbi->record_size)
> +			continue;
> +
>  		/* Try to insert attribute into this subrecord. */
>  		attr = ni_ins_new_attr(ni, mi, le, type, name, name_len, asize,
>  				       name_off, svcn, ins_le);
> -- 
> 2.28.0