From: "Pedro Falcato" <pedro.falcato@gmail.com>
To: "Marvin Häuser" <mhaeuser@posteo.de>
Cc: Savva Mitrofanov <savvamtr@gmail.com>,
edk2-devel-groups-io <devel@edk2.groups.io>,
Vitaly Cheptsov <vit9696@protonmail.com>
Subject: Re: [edk2-platforms][PATCH v3 11/11] Ext4Pkg: Filter out directory entry names containing \0 as invalid
Date: Fri, 27 Jan 2023 14:09:23 +0000 [thread overview]
Message-ID: <CAKbZUD0xHkYTb2CWLFhGk751Wf=+zZBC3A4eOGgxThFx9BQJmg@mail.gmail.com> (raw)
In-Reply-To: <B37F555D-E41E-44D8-984F-2762C1E735F0@posteo.de>
On Fri, Jan 27, 2023 at 10:04 AM Marvin Häuser <mhaeuser@posteo.de> wrote:
>
> On 27. Jan 2023, at 10:29, Savva Mitrofanov <savvamtr@gmail.com> wrote:
> >
> > The directory entry name conventions forbid having null-terminator
> > symbols in its body and can lead to undefined behavior conditions
> > and crashes
> >
> > Cc: Marvin Häuser <mhaeuser@posteo.de>
> > Cc: Pedro Falcato <pedro.falcato@gmail.com>
> > Cc: Vitaly Cheptsov <vit9696@protonmail.com>
> > Fixes: 89b2bb0db263 ("Ext4Pkg: Fix and clarify handling regarding non-utf8 dir entries")
> > Signed-off-by: Savva Mitrofanov <savvamtr@gmail.com>
> > ---
> > Features/Ext4Pkg/Ext4Dxe/Directory.c | 9 ++++++++-
> > 1 file changed, 8 insertions(+), 1 deletion(-)
> >
> > diff --git a/Features/Ext4Pkg/Ext4Dxe/Directory.c b/Features/Ext4Pkg/Ext4Dxe/Directory.c
> > index 0753a20b5377..465749c9b51d 100644
> > --- a/Features/Ext4Pkg/Ext4Dxe/Directory.c
> > +++ b/Features/Ext4Pkg/Ext4Dxe/Directory.c
> > @@ -28,9 +28,16 @@ Ext4GetUcs2DirentName (
> > {
> > CHAR8 Utf8NameBuf[EXT4_NAME_MAX + 1];
> > UINT16 *Str;
> > + UINTN Index;
>
> I *really* do not like UINTN in code that does not deal with buffer addresses and sizes. I'd change it to UINT8, but I'll leave it up to Pedro.
Considering this is a size (length of name) and it gets explicitly
bounded by name_len (a UINT8) I'm okay with it. But if for some reason
you need to submit a v4, please change.
Reviewed-by: Pedro Falcato <pedro.falcato@gmail.com>
--
Pedro
next prev parent reply other threads:[~2023-01-27 14:09 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-27 9:29 [edk2-platforms][PATCH v3 00/11] Ext4Pkg: Code correctness and security improvements Savva Mitrofanov
2023-01-27 9:29 ` [edk2-platforms][PATCH v3 01/11] Ext4Pkg: Fix memory leak in Ext4RetrieveDirent Savva Mitrofanov
2023-01-27 14:12 ` Pedro Falcato
2023-01-27 14:16 ` Marvin Häuser
2023-01-27 9:29 ` [edk2-platforms][PATCH v3 02/11] Ext4Pkg: Fix incorrect checksum metadata feature check Savva Mitrofanov
2023-01-27 10:02 ` Marvin Häuser
2023-01-27 14:29 ` Pedro Falcato
2023-01-30 8:38 ` Marvin Häuser
2023-01-30 8:42 ` Savva Mitrofanov
2023-01-27 9:29 ` [edk2-platforms][PATCH v3 03/11] Ext4Pkg: Fix division by zero by adding check for s_inodes_per_group Savva Mitrofanov
2023-01-27 14:13 ` Pedro Falcato
2023-01-27 14:16 ` Marvin Häuser
2023-01-27 9:29 ` [edk2-platforms][PATCH v3 04/11] Ext4Pkg: Add inode number validity check Savva Mitrofanov
2023-01-27 14:19 ` Pedro Falcato
2023-02-02 10:15 ` Savva Mitrofanov
2023-01-27 9:29 ` [edk2-platforms][PATCH v3 05/11] Ext4Pkg: Fix shift out of bounds in Ext4OpenSuperblock Savva Mitrofanov
2023-01-27 14:22 ` Pedro Falcato
2023-01-27 14:24 ` Marvin Häuser
2023-01-27 16:14 ` Savva Mitrofanov
2023-01-27 9:29 ` [edk2-platforms][PATCH v3 06/11] Ext4Pkg: Corrects integer overflow check logic in DiskUtil Savva Mitrofanov
2023-01-27 14:24 ` Pedro Falcato
2023-01-27 16:10 ` Savva Mitrofanov
2023-01-27 16:21 ` Pedro Falcato
2023-01-27 9:29 ` [edk2-platforms][PATCH v3 07/11] Ext4Pkg: Check that source file is directory in Ext4OpenInternal Savva Mitrofanov
2023-01-27 14:26 ` Pedro Falcato
2023-01-27 14:33 ` Marvin Häuser
2023-01-27 9:29 ` [edk2-platforms][PATCH v3 08/11] Ext4Pkg: Check VolumeName allocation correctness in Ext4GetVolumeName Savva Mitrofanov
2023-01-27 14:27 ` [edk2-devel] " Pedro Falcato
2023-01-27 14:34 ` Marvin Häuser
2023-01-27 9:29 ` [edk2-platforms][PATCH v3 09/11] Ext4Pkg: Add missing exit Status in Ext4OpenDirent Savva Mitrofanov
2023-01-27 14:28 ` Pedro Falcato
2023-01-27 14:34 ` Marvin Häuser
2023-01-27 9:29 ` [edk2-platforms][PATCH v3 10/11] Ext4Pkg: Fixes build on MSVC Savva Mitrofanov
2023-01-27 14:33 ` Pedro Falcato
2023-01-27 14:36 ` Marvin Häuser
2023-01-30 8:35 ` Marvin Häuser
2023-01-27 9:29 ` [edk2-platforms][PATCH v3 11/11] Ext4Pkg: Filter out directory entry names containing \0 as invalid Savva Mitrofanov
2023-01-27 10:04 ` Marvin Häuser
2023-01-27 14:09 ` Pedro Falcato [this message]
2023-01-27 14:14 ` Marvin Häuser
2023-01-30 8:48 ` Marvin Häuser
2023-01-30 8:19 ` Savva Mitrofanov
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