linux-kernel - [PATCH 10/10] Use safe_apic_wait_icr_idle in __send_IPI_dest_field

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:	Wed, 25 Apr 2007 20:51:12 +0900
From:	Fernando Luis Vázquez Cao 
	<fernando@....ntt.co.jp>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	horms@...ge.net.au, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org, ak@...e.de, vgoyal@...ibm.com,
	mbligh@...gle.com, Keith Owens <kaos@....com.au>,
	akpm@...ux-foundation.org
Subject: [PATCH 10/10] Use safe_apic_wait_icr_idle in __send_IPI_dest_field
	- x86_64

Use safe_apic_wait_icr_idle to check ICR idle bit if the vector is
NMI_VECTOR to avoid potential hangups in the event of crash when kdump
tries to stop the other CPUs.

Signed-off-by: Fernando Luis Vazquez Cao <fernando@....ntt.co.jp>
---

diff -urNp linux-2.6.21-rc7-orig/include/asm-x86_64/ipi.h linux-2.6.21-rc7/include/asm-x86_64/ipi.h
--- linux-2.6.21-rc7-orig/include/asm-x86_64/ipi.h	2007-04-23 17:34:56.000000000 +0900
+++ linux-2.6.21-rc7/include/asm-x86_64/ipi.h	2007-04-25 19:15:01.000000000 +0900
@@ -87,7 +87,10 @@ static inline void __send_IPI_dest_field
 	/*
 	 * Wait for idle.
 	 */
-	apic_wait_icr_idle();
+	if (unlikely(vector == NMI_VECTOR))
+		safe_apic_wait_icr_idle();
+	else
+		apic_wait_icr_idle();
 
 	/*
 	 * prepare target chip field


-
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/