linux-kernel - [PATCH 2/2] MIPS: MSA: bugfix of keeping MSA live context through clone or fork

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

Date:	Tue, 19 May 2015 14:13:59 -0700
From:	Leonid Yegoshin <Leonid.Yegoshin@...tec.com>
To:	<linux-mips@...ux-mips.org>, <rusty@...tcorp.com.au>,
	<alexinbeijing@...il.com>, <paul.burton@...tec.com>,
	<david.daney@...ium.com>, <alex@...x-smith.me.uk>,
	<linux-kernel@...r.kernel.org>, <ralf@...ux-mips.org>,
	<james.hogan@...tec.com>, <markos.chandras@...tec.com>,
	<macro@...ux-mips.org>, <eunb.song@...sung.com>,
	<manuel.lauss@...il.com>, <andreas.herrmann@...iumnetworks.com>
Subject: [PATCH 2/2] MIPS: MSA: bugfix of keeping MSA live context through
 clone or fork

It seems the patch 39148e94e3e1f0477ce8ed3fda00123722681f3a

    "MIPS: fork: Fix MSA/FPU/DSP context duplication race"

assumes that DSP/FPU and MSA context should be inherited in child at clone/fork
(look into patch description). It was done on Matthew Fortune request from
toolchain team, I guess.

Well, in this case it should prevent clearing TIF_MSA_CTX_LIVE in copy_thread().

Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@...tec.com>
---
 arch/mips/kernel/process.c |    1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index f2975d4d1e44..a16e62d40210 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -163,7 +163,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
 
 	clear_tsk_thread_flag(p, TIF_USEDFPU);
 	clear_tsk_thread_flag(p, TIF_USEDMSA);
-	clear_tsk_thread_flag(p, TIF_MSA_CTX_LIVE);
 
 #ifdef CONFIG_MIPS_MT_FPAFF
 	clear_tsk_thread_flag(p, TIF_FPUBOUND);

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/