From: "Andi Kleen" <ak@suse.de>
To: torvalds@osdl.org
Cc: discuss@x86-64.org, linux-kernel@vger.kernel.org, muli@il.ibm.com
Subject: [PATCH for 2.6.18] [3/8] x86_64: Calgary IOMMU - fix off by one error
Date: Sat, 29 Jul 2006 21:42:40 +0200 [thread overview]
Message-ID: <44cbba30.5S7ehjoofASZQI2O%ak@suse.de> (raw)
From: Muli Ben-Yehuda <muli@il.ibm.com>
# HG changeset patch
# User Muli Ben-Yehuda <muli@il.ibm.com>
# Date 1153234988 -10800
# Node ID 81635ec2e677165285c2a483958899217f9631d8
# Parent 1b8d63e34819bac5b6aac0048ef79004fb243db9
x86_64: Calgary IOMMU - fix off by one error
Fixed off-by-one error in detect_calgary and calgary_init which will
cause arrays to overflow. Also, removed impossible to hit BUG_ON.
Signed-Off-By: Jon Mason <jdmason@us.ibm.com>
Signed-Off-By: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
---
arch/x86_64/kernel/pci-calgary.c | 7 +++----
1 files changed, 3 insertions(+), 4 deletions(-)
Index: linux-2.6.18-rc2-git7/arch/x86_64/kernel/pci-calgary.c
===================================================================
--- linux-2.6.18-rc2-git7.orig/arch/x86_64/kernel/pci-calgary.c
+++ linux-2.6.18-rc2-git7/arch/x86_64/kernel/pci-calgary.c
@@ -812,7 +812,7 @@ static int __init calgary_init(void)
int i, ret = -ENODEV;
struct pci_dev *dev = NULL;
- for (i = 0; i <= num_online_nodes() * MAX_NUM_OF_PHBS; i++) {
+ for (i = 0; i < num_online_nodes() * MAX_NUM_OF_PHBS; i++) {
dev = pci_get_device(PCI_VENDOR_ID_IBM,
PCI_DEVICE_ID_IBM_CALGARY,
dev);
@@ -890,9 +890,8 @@ void __init detect_calgary(void)
specified_table_size = determine_tce_table_size(end_pfn * PAGE_SIZE);
for (bus = 0, table_idx = 0;
- bus <= num_online_nodes() * MAX_PHB_BUS_NUM;
+ bus < num_online_nodes() * MAX_PHB_BUS_NUM;
bus++) {
- BUG_ON(bus > MAX_NUMNODES * MAX_PHB_BUS_NUM);
if (read_pci_config(bus, 0, 0, 0) != PCI_VENDOR_DEVICE_ID_CALGARY)
continue;
if (test_bit(bus, translation_disabled)) {
@@ -1002,7 +1001,7 @@ static int __init calgary_parse_options(
if (p == endp)
break;
- if (bridge <= (num_online_nodes() * MAX_PHB_BUS_NUM)) {
+ if (bridge < (num_online_nodes() * MAX_PHB_BUS_NUM)) {
printk(KERN_INFO "Calgary: disabling "
"translation for PHB 0x%x\n", bridge);
set_bit(bridge, translation_disabled);
reply other threads:[~2006-07-29 19:43 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=44cbba30.5S7ehjoofASZQI2O%ak@suse.de \
--to=ak@suse.de \
--cc=discuss@x86-64.org \
--cc=linux-kernel@vger.kernel.org \
--cc=muli@il.ibm.com \
--cc=torvalds@osdl.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®