Bug#904385: arm64: sigaltstack fails with MINSIGSTKSZ for 32-bit processes

To: 904385@bugs.debian.org
Subject: Bug#904385: arm64: sigaltstack fails with MINSIGSTKSZ for 32-bit processes
From: Aurelien Jarno <aurel32@debian.org>
Date: Mon, 23 Jul 2018 21:40:33 +0200
Message-id: <[🔎] 20180723194033.GB31871@aurel32.net>
Reply-to: Aurelien Jarno <aurel32@debian.org>, 904385@bugs.debian.org
In-reply-to: <[🔎] 153237430026.2128.15229506653308037337.reportbug@arm64.local>
References: <[🔎] 153237430026.2128.15229506653308037337.reportbug@arm64.local> <[🔎] 153237430026.2128.15229506653308037337.reportbug@arm64.local>

control: affects -1 glibc
control: found linux/4.17.6-2

On 2018-07-23 21:31, Aurelien Jarno wrote:
> Package: src:linux
> Version: 4.9.110-1
> Severity: normal
> 
> Dear Maintainer,
> 
> The arm64 kernel allows one to run aarch32 processes on an aarch64
> processor (if it has support for it), using the standard 32/64-bit
> syscall compatibility. However this compat layer does not correctly
> validate the arguments of the sigaltstack syscall.
> 

I forgot to say that the problem is reproducible with kernel 4.17.6.

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

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Follow-Ups:
- Bug#904385: arm64: sigaltstack fails with MINSIGSTKSZ for 32-bit processes
  - From: Steve McIntyre <steve@einval.com>

References:
- Bug#904385: arm64: sigaltstack fails with MINSIGSTKSZ for 32-bit processes
  - From: Aurelien Jarno <aurel32@debian.org>

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