linux-kernel - RE: [PATCH] fs: NTFS read-write driver GPL implementation by Paragon Software.

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Message-ID: <5588b1f433bb4844ae4db776030d323f@paragon-software.com>
Date:   Thu, 20 Aug 2020 10:38:07 +0000
From:   Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
To:     Aurélien Aptel <aaptel@...e.com>,
        "viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>
Subject: RE: [PATCH] fs: NTFS read-write driver GPL implementation by Paragon
 Software.

From: Aurélien Aptel <aaptel@...e.com>
Sent: Friday, August 14, 2020 6:30 PM
> I've tried this using libntfs-3g mkfs.ntfs
> 
> # mkfs.ntfs /dev/vb1
> # mount -t ntfs3 /dev/vb1 /mnt
> 
> This already triggered UBSAN:
> Then I've tried to copy /etc into it:
> ...
> # cp -rp /etc /mnt
> 
> But this triggered a NULL ptr deref:
> 
>  BUG: kernel NULL pointer dereference, address: 0000000000000028

Thanks! This will be fixed in v2. To give some context: we use our mkfs utility in tests, coupled with a Windows-native one as a reference. P.S. Already have extended this approach with the current mkfs.ntfs utility as well.