Dan Carpenter 20c4d49c0f irqdomain: Prevent potential NULL pointer dereference in irq_domain_push_irq() ...

This code generates a Smatch warning:

  kernel/irq/irqdomain.c:1511 irq_domain_push_irq()
  warn: variable dereferenced before check 'root_irq_data' (see line 1508)

irq_get_irq_data() can return a NULL pointer, but the code dereferences
the returned pointer before checking it.

Move the NULL pointer check before the dereference.

[ tglx: Rewrote changelog to be precise and conforming to the instructions
  	in submitting-patches and added a Fixes tag. Sigh! ]

Fixes: 495c38d3001f ("irqdomain: Add irq_domain_{push,pop}_irq() functions")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: David Daney <david.daney@cavium.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: kernel-janitors@vger.kernel.org
Link: http://lkml.kernel.org/r/20170825121409.6rfv4vt6ztz2oqkt@mwanda

2017-08-25 22:40:26 +02:00

..

affinity.c

pci-v4.13-changes

2017-07-08 15:51:57 -07:00

autoprobe.c

genirq: Add force argument to irq_startup()

2017-06-22 18:21:24 +02:00

chip.c

genirq: Add handle_fasteoi_{level,edge}_irq flow handlers

2017-08-18 11:21:41 +02:00

cpuhotplug.c

genirq/cpuhotplug: Revert "Set force affinity flag on hotplug migration"

2017-07-27 15:40:02 +02:00

debug.h

irq: hide debug macros so they don't collide with others.

2012-04-23 12:30:03 -04:00

debugfs.c

genirq/debugfs: Triggering of interrupts from userspace

2017-08-18 10:36:24 +02:00

devres.c

irq/generic-chip: Provide devm_irq_setup_generic_chip()

2017-06-21 15:53:11 +02:00

dummychip.c

Merge branch 'linus' into irq/core

2015-06-05 22:25:01 +02:00

generic-chip.c

irq/generic-chip: Export irq_init_generic_chip() locally

2017-06-21 15:53:11 +02:00

handle.c

There has been a fair amount of activity in the docs tree this time

2017-07-03 21:13:25 -07:00

internals.h

genirq: Fix for_each_action_of_desc() macro

2017-08-14 12:10:37 +02:00

ipi.c

genirq: Fix missing irq allocation affinity hint

2016-07-19 10:49:47 +02:00

irq_sim.c

genirq/irq_sim: Add a devres variant of irq_sim_init()

2017-08-16 16:40:02 +02:00

irqdesc.c

Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2017-07-09 10:24:46 -07:00

irqdomain.c

irqdomain: Prevent potential NULL pointer dereference in irq_domain_push_irq()

2017-08-25 22:40:26 +02:00

Kconfig

genirq: Add handle_fasteoi_{level,edge}_irq flow handlers

2017-08-18 11:21:41 +02:00

Makefile

genirq/irq_sim: Add a simple interrupt simulator framework

2017-08-16 16:40:02 +02:00

manage.c

genirq: Keep chip buslock across irq_request/release_resources()

2017-07-12 10:14:42 +02:00

migration.c

genirq: Provide irq_fixup_move_pending()

2017-06-22 18:21:13 +02:00

msi.c

genirq/irqdomain: Remove auto-recursive hierarchy support

2017-06-22 18:29:34 +02:00

pm.c

genirq/PM: Properly pretend disabled state when force resuming interrupts

2017-07-17 22:32:20 +02:00

proc.c

genirq: Fix semicolon.cocci warnings

2017-08-25 22:40:25 +02:00

resend.c

genirq: Remove irq argument from irq flow handlers

2015-09-16 15:47:51 +02:00

settings.h

genirq: Add flag to force mask in disable_irq[_nosync]()

2015-10-11 11:33:42 +02:00

spurious.c

genirq: Clarify logic calculating bogus irqreturn_t values

2017-02-16 15:32:19 +01:00

timings.c

genirq/timings: Add infrastructure for estimating the next interrupt arrival time

2017-06-24 11:44:39 +02:00