linux-kernel - RE: [x86/xsave] WARNING: CPU: 0 PID: 1 at arch/x86/kernel/xsave.c:306 save_xstate

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] [day] [month] [year] [list]

Message-ID: <3E5A0FA7E9CA944F9D5414FEC6C712205C8D769D@ORSMSX106.amr.corp.intel.com>
Date:	Sat, 9 May 2015 15:21:06 +0000
From:	"Yu, Fenghua" <fenghua.yu@...el.com>
To:	"Wu, Fengguang" <fengguang.wu@...el.com>,
	"Hansen, Dave" <dave.hansen@...el.com>
CC:	LKP <lkp@...org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [x86/xsave] WARNING: CPU: 0 PID: 1 at
 arch/x86/kernel/xsave.c:306 save_xstate_sig()

> From: Wu, Fengguang
> Sent: Saturday, May 09, 2015 5:31 AM
> To: Hansen, Dave
> Just in case this information will help: this patch adds one more warning
> message.
> 
> https://github.com/hansendc/linux.git github-mpx
> 
> commit 3701f7533ba43e0aec12bf2dffd49855499fa524
> [    3.058044] WARNING: CPU: 0 PID: 1 at arch/x86/kernel/xsave.c:306
> save_xstate_sig+0x329/0x340()
> [    3.059684] mismatched xstate sizes

The issue has been fixed in https://lkml.org/lkml/2015/5/8/737

The patch in this git tree missed the following part when ported
to this git tree.

diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c
index 00918327..8a7b96b 100644
--- a/arch/x86/kernel/i387.c
+++ b/arch/x86/kernel/i387.c
@@ -166,6 +166,7 @@ static void init_thread_xstate(void)
 		setup_clear_cpu_cap(X86_FEATURE_XSAVE);
 		setup_clear_cpu_cap(X86_FEATURE_XSAVEOPT);
 		xstate_size = sizeof(struct i387_soft_struct);
+		user_xstate_size = xstate_size;
 		return;
 	}
 
@@ -173,6 +174,8 @@ static void init_thread_xstate(void)
 		xstate_size = sizeof(struct i387_fxsave_struct);
 	else
 		xstate_size = sizeof(struct i387_fsave_struct);
+
+	user_xstate_size = xstate_size;
 }
 
 /*

Thanks.

-Fenghua

--
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/