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]
Date:   Wed, 1 Nov 2017 04:09:53 -0700
From:   tip-bot for Rakib Mullick <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     mingo@...nel.org, rakib.mullick@...il.com, tglx@...utronix.de,
        peterz@...radead.org, torvalds@...ux-foundation.org, hpa@...or.com,
        linux-kernel@...r.kernel.org
Subject: [tip:irq/core] irq/core: Fix boot crash when the irqaffinity= boot
 parameter is passed on CPUMASK_OFFSTACK=y kernels(v1)

Commit-ID:  10d94ff4d558b96bfc4f55bb0051ae4d938246fe
Gitweb:     https://git.kernel.org/tip/10d94ff4d558b96bfc4f55bb0051ae4d938246fe
Author:     Rakib Mullick <rakib.mullick@...il.com>
AuthorDate: Wed, 1 Nov 2017 10:14:51 +0600
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 1 Nov 2017 09:56:39 +0100

irq/core: Fix boot crash when the irqaffinity= boot parameter is passed on CPUMASK_OFFSTACK=y kernels(v1)

When the irqaffinity= kernel parameter is passed in a CPUMASK_OFFSTACK=y
kernel, it fails to boot, because zalloc_cpumask_var() cannot be used before
initializing the slab allocator to allocate a cpumask.

So, use alloc_bootmem_cpumask_var() instead.

Also do some cleanups while at it: in init_irq_default_affinity() remove
an #ifdef via using cpumask_available().

Signed-off-by: Rakib Mullick <rakib.mullick@...il.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Link: http://lkml.kernel.org/r/20171026045800.27087-1-rakib.mullick@gmail.com
Link: http://lkml.kernel.org/r/20171101041451.12581-1-rakib.mullick@gmail.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 kernel/irq/irqdesc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 982a357..f2edcf8 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -27,7 +27,7 @@ static struct lock_class_key irq_desc_lock_class;
 #if defined(CONFIG_SMP)
 static int __init irq_affinity_setup(char *str)
 {
-	zalloc_cpumask_var(&irq_default_affinity, GFP_NOWAIT);
+	alloc_bootmem_cpumask_var(&irq_default_affinity);
 	cpulist_parse(str, irq_default_affinity);
 	/*
 	 * Set at least the boot cpu. We don't want to end up with
@@ -40,10 +40,8 @@ __setup("irqaffinity=", irq_affinity_setup);
 
 static void __init init_irq_default_affinity(void)
 {
-#ifdef CONFIG_CPUMASK_OFFSTACK
-	if (!irq_default_affinity)
+	if (!cpumask_available(irq_default_affinity))
 		zalloc_cpumask_var(&irq_default_affinity, GFP_NOWAIT);
-#endif
 	if (cpumask_empty(irq_default_affinity))
 		cpumask_setall(irq_default_affinity);
 }

Powered by blists - more mailing lists