path: root/kernel/irq/matrix.c
diff options
authorMichael Kelley <mikelley@microsoft.com>2018-11-01 00:35:05 +0000
committerThomas Gleixner <tglx@linutronix.de>2018-11-01 10:00:38 +0100
commit57f01796f14fecf00d330fe39c8d2477ced9cd79 (patch)
tree720d25c0f621a6422bd4be5af0a2c51d99b8091e /kernel/irq/matrix.c
parent5b7449810ae6d652629c550d3974c8453836d229 (diff)
irq/matrix: Fix memory overallocation
IRQ_MATRIX_SIZE is the number of longs needed for a bitmap, multiplied by the size of a long, yielding a byte count. But it is used to size an array of longs, which is way more memory than is needed. Change IRQ_MATRIX_SIZE so it is just the number of longs needed and the arrays come out the correct size. Fixes: 2f75d9e1c905 ("genirq: Implement bitmap matrix allocator") Signed-off-by: Michael Kelley <mikelley@microsoft.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: KY Srinivasan <kys@microsoft.com> Link: https://lkml.kernel.org/r/1541032428-10392-1-git-send-email-mikelley@microsoft.com
Diffstat (limited to 'kernel/irq/matrix.c')
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/irq/matrix.c b/kernel/irq/matrix.c
index 6e6d467f3dec..1f0985adf193 100644
--- a/kernel/irq/matrix.c
+++ b/kernel/irq/matrix.c
@@ -8,7 +8,7 @@
#include <linux/cpu.h>
#include <linux/irq.h>
-#define IRQ_MATRIX_SIZE (BITS_TO_LONGS(IRQ_MATRIX_BITS) * sizeof(unsigned long))
struct cpumap {
unsigned int available;