linux-kernel - [tip:x86/apic] x86, ioapic: Throw BUG instead of NULL dereference

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: <tip-a7428cd2ef77734465e36bceb43290e37e2a97c6@git.kernel.org>
Date:	Wed, 5 Aug 2009 10:55:14 GMT
From:	tip-bot for Cyrill Gorcunov <gorcunov@...nvz.org>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	gorcunov@...nvz.org, tglx@...utronix.de, mingo@...e.hu
Subject: [tip:x86/apic] x86, ioapic: Throw BUG instead of NULL dereference

Commit-ID:  a7428cd2ef77734465e36bceb43290e37e2a97c6
Gitweb:     http://git.kernel.org/tip/a7428cd2ef77734465e36bceb43290e37e2a97c6
Author:     Cyrill Gorcunov <gorcunov@...nvz.org>
AuthorDate: Sat, 1 Aug 2009 11:48:00 +0400
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Wed, 5 Aug 2009 10:30:50 +0200

x86, ioapic: Throw BUG instead of NULL dereference

Instead of plain NULL deref we better throw error
message with a backtrace. Actually we need more
gracious error handling here. Meanwhile leave it
as is.

Signed-off-by: Cyrill Gorcunov <gorcunov@...nvz.org>
Cc: yinghai@...nel.org
LKML-Reference: <20090801075435.769301745@...nvz.org>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 arch/x86/kernel/apic/io_apic.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index ffd8fdf..2a145d3 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -503,6 +503,10 @@ static void add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pin
 	}
 
 	entry = get_one_free_irq_2_pin(node);
+	if (!entry) {
+		printk(KERN_ERR "can not alloc irq_pin_list\n");
+		BUG_ON(1);
+	}
 	entry->apic = apic;
 	entry->pin = pin;
 
--
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/