linux-kernel - ppc compat v4.16 regression: sending SIGTRAP or SIGFPE via kill() returns wrong values in si_pid and si

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20180409152253.GD10489@altlinux.org>
Date:   Mon, 9 Apr 2018 18:22:53 +0300
From:   "Dmitry V. Levin" <ldv@...linux.org>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: ppc compat v4.16 regression: sending SIGTRAP or SIGFPE via kill()
 returns wrong values in si_pid and si_uid

Hi,

There seems to be a regression in v4.16 on ppc compat very similar
to sparc compat regression reported earlier at
https://marc.info/?l=linux-sparc&m=151501500704383 .

The symptoms are exactly the same: the same signal_receive test from
the strace test suite fails with the same diagnostics:
https://build.opensuse.org/public/build/home:ldv_alt/openSUSE_Factory_PowerPC/ppc/strace/_log

Unfortunately, I do not have any means to investigate further,
so just passing this information on to those who care.

-- 
ldv

Download attachment "signature.asc" of type "application/pgp-signature" (802 bytes)