linux-kernel - Re: [PATCH] vfs: fix preadv64v2 and pwritev64v2 compat syscalls with offset == -1

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Message-ID: <20190112190713.GA21480@aurel32.net>
Date:   Sat, 12 Jan 2019 20:07:13 +0100
From:   Aurelien Jarno <aurelien@...el32.net>
To:     linux-kernel@...r.kernel.org
Cc:     linux-fsdevel@...r.kernel.org, x86@...nel.org,
        Alexander Viro <viro@...iv.linux.org.uk>,
        "H . J . Lu" <hjl.tools@...il.com>
Subject: Re: [PATCH] vfs: fix preadv64v2 and pwritev64v2 compat syscalls with
 offset == -1

On 2018-12-06 20:05, Aurelien Jarno wrote:
> The preadv2 and pwritev2 syscalls are supposed to emulate the readv and
> writev syscalls when offset == -1. Therefore the compat code should
> check for offset before calling do_compat_preadv64 and
> do_compat_pwritev64. This is the case for the preadv2 and pwritev2
> syscalls, but handling of offset == -1 is missing in their 64-bit
> equivalent.
> 
> This patch fixes that, calling do_compat_readv and do_compat_writev when
> offset == -1. This fixes the following glibc tests on x32:
>  - misc/tst-preadvwritev2
>  - misc/tst-preadvwritev64v2
> 
> Cc: Alexander Viro <viro@...iv.linux.org.uk>
> Cc: H.J. Lu <hjl.tools@...il.com>
> Signed-off-by: Aurelien Jarno <aurelien@...el32.net>
> ---
>  fs/read_write.c | 6 ++++++
>  1 file changed, 6 insertions(+)

Any news about this patch?

Thanks,
Aurelien

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien@...el32.net                 http://www.aurel32.net