apfs/linux-apfs
0
0
Fork 0
mirror of https://github.com/linux-apfs/linux-apfs.git synced 2026-05-01 15:00:59 -07:00
Code Issues Packages Projects Releases Wiki Activity

genirq: check chip->ack before calling

Browse Source 
Impact: fix theoretical NULL dereference

The generic irq layer doesn't know whether irq_chip has ack routine on some
architectures or not. Upon that, before calling chip->ack, we should check
that it's not NULL.

Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Wang Chen
2008-12-29 13:35:11 +08:00
committed by Ingo Molnar
parent 860cf8894b
commit efdc64f0c7
1 changed files with 4 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel/irq/chip.c
+4 -2
View File
@@ -290,7 +290,8 @@ static inline void mask_ack_irq(struct irq_desc *desc, int irq)
desc->chip->mask_ack(irq);
else {
desc->chip->mask(irq);
desc->chip->ack(irq);
if (desc->chip->ack)
desc->chip->ack(irq);
}
}
@@ -475,7 +476,8 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc)
kstat_incr_irqs_this_cpu(irq, desc);
/* Start handling the irq */
desc->chip->ack(irq);
if (desc->chip->ack)
desc->chip->ack(irq);
desc = irq_remap_to_desc(irq, desc);
/* Mark the IRQ currently in progress.*/