linux-kernel - Re: [syzbot] kernel BUG in ntfs_read_inode

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Message-ID: <860dfdad-d7db-9c27-adfe-02a3b2e02d0b@gmail.com>
Date:   Mon, 17 Jan 2022 22:03:14 +0300
From:   Pavel Skripkin <paskripkin@...il.com>
To:     syzbot <syzbot+3c765c5248797356edaa@...kaller.appspotmail.com>,
        anton@...era.com, linux-kernel@...r.kernel.org,
        linux-ntfs-dev@...ts.sourceforge.net,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] kernel BUG in ntfs_read_inode_mount

On 1/17/22 22:02, Pavel Skripkin wrote:
> On 1/17/22 13:09, syzbot wrote:
>> Hello,
>> 
>> syzbot found the following issue on:
>> 
>> HEAD commit:    d0a231f01e5b Merge tag 'pci-v5.17-changes' of git://git.ke..
>> git tree:       upstream
>> console output: https://syzkaller.appspot.com/x/log.txt?x=11f83837b00000
>> kernel config:  https://syzkaller.appspot.com/x/.config?x=986ed422f1741853
>> dashboard link: https://syzkaller.appspot.com/bug?extid=3c765c5248797356edaa
>> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
>> 
>> Unfortunately, I don't have any reproducer for this issue yet.
>> 
> 
> Sad :(
> 
>> IMPORTANT: if you fix the issue, please add the following tag to the commit:
>> Reported-by: syzbot+3c765c5248797356edaa@...kaller.appspotmail.com
>> 
> 
> __ntfs_malloc() calls BUG_ON() in case of requested size is equal to
> zero. Seems like syzbot has once again crafted malicious fs image that
> has attr_list_size == 0
> 
> Just for thoughts
> 
> 

Clicked 'Send' button too early, sorry

With regards,
Pavel Skripkin


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