| 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
| ||
|
Date: Tue, 30 Oct 2012 00:15:41 +0800
From: Chuansheng Liu <chuansheng.liu@...el.com>
To: mingo@...hat.com, hpa@...or.com, tglx@...utronix.de,
yinghai@...nel.org, suresh.b.siddha@...el.com
Cc: x86@...nel.org, linux-kernel@...r.kernel.org,
chuansheng.liu@...el.com
Subject: [PATCH] x86/ioapic: Fix the vector_irq[] is corrupted randomly
Not all irq chips are IO-APIC chip.
In our system, there are many demux GPIO interrupts except for the
io-apic chip interrupts, and these GPIO interrupts are belonged
to other irq chips, the chip data is not type of struct irq_cfg
either.
But in function __setup_vector_irq(), it listed all allocated irqs,
and presume all irq chip is ioapic_chip and the chip data is type
of struct irq_cfg, it possibly causes the vector_irq is corrupted
randomly.
For example, one irq 258 is not io-apic chip irq, in __setup_vector_irq(),
the chip data is forced to be used as struct irq_cfg, then the value
cfg->domain and cfg->vector are wrong to be used to write vector_irq:
vector = cfg->vector;
per_cpu(vector_irq, cpu)[vector] = irq;
This patch use the .flags to identify if the irq chip is io-apic.
Signed-off-by: liu chuansheng <chuansheng.liu@...el.com>
---
arch/x86/kernel/apic/io_apic.c | 24 ++++++++++++++++++++++++
1 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 1817fa9..f9cac47 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -68,6 +68,18 @@
#define for_each_irq_pin(entry, head) \
for (entry = head; entry; entry = entry->next)
+/* need more thoughts ... */
+#define CHIP_FLAG_IOAPIC 0x1000
+static inline bool is_ioapic_irq(int irq)
+{
+ struct irq_chip *chip;
+ chip = irq_get_chip(irq);
+ if ((chip) && (chip->flags == CHIP_FLAG_IOAPIC))
+ return true;
+
+ return false;
+}
+
#ifdef CONFIG_IRQ_REMAP
static void irq_remap_modify_chip_defaults(struct irq_chip *chip);
static inline bool irq_remapped(struct irq_cfg *cfg)
@@ -1238,6 +1250,9 @@ void __setup_vector_irq(int cpu)
raw_spin_lock(&vector_lock);
/* Mark the inuse vectors */
for_each_active_irq(irq) {
+ if (!is_ioapic_irq(irq))
+ continue;
+
cfg = irq_get_chip_data(irq);
if (!cfg)
continue;
@@ -1259,6 +1274,9 @@ void __setup_vector_irq(int cpu)
if (irq < 0)
continue;
+ if (!is_ioapic_irq(irq))
+ continue;
+
cfg = irq_cfg(irq);
if (!cpumask_test_cpu(cpu, cfg->domain))
per_cpu(vector_irq, cpu)[vector] = -1;
@@ -2596,6 +2614,7 @@ static struct irq_chip ioapic_chip __read_mostly = {
.irq_eoi = ack_apic_level,
.irq_set_affinity = ioapic_set_affinity,
.irq_retrigger = ioapic_retrigger_irq,
+ .flags = CHIP_FLAG_IOAPIC,
};
static inline void init_IO_APIC_traps(void)
@@ -2661,6 +2680,7 @@ static struct irq_chip lapic_chip __read_mostly = {
.irq_mask = mask_lapic_irq,
.irq_unmask = unmask_lapic_irq,
.irq_ack = ack_lapic_irq,
+ .flags = CHIP_FLAG_IOAPIC,
};
static void lapic_register_intr(int irq)
@@ -3146,6 +3166,7 @@ static struct irq_chip msi_chip = {
.irq_ack = ack_apic_edge,
.irq_set_affinity = msi_set_affinity,
.irq_retrigger = ioapic_retrigger_irq,
+ .flags = CHIP_FLAG_IOAPIC,
};
static int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int irq)
@@ -3260,6 +3281,7 @@ static struct irq_chip dmar_msi_type = {
.irq_ack = ack_apic_edge,
.irq_set_affinity = dmar_msi_set_affinity,
.irq_retrigger = ioapic_retrigger_irq,
+ .flags = CHIP_FLAG_IOAPIC,
};
int arch_setup_dmar_msi(unsigned int irq)
@@ -3308,6 +3330,7 @@ static struct irq_chip hpet_msi_type = {
.irq_ack = ack_apic_edge,
.irq_set_affinity = hpet_msi_set_affinity,
.irq_retrigger = ioapic_retrigger_irq,
+ .flags = CHIP_FLAG_IOAPIC,
};
int arch_setup_hpet_msi(unsigned int irq, unsigned int id)
@@ -3375,6 +3398,7 @@ static struct irq_chip ht_irq_chip = {
.irq_ack = ack_apic_edge,
.irq_set_affinity = ht_set_affinity,
.irq_retrigger = ioapic_retrigger_irq,
+ .flags = CHIP_FLAG_IOAPIC,
};
int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev)
--
1.7.0.4
--
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/
Powered by blists - more mailing lists