This is a note to let you know that I've just added the patch titled
powerpc/eeh: Check handle_eeh_events() return value
to the 3.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
powerpc-eeh-check-handle_eeh_events-return-value.patch
and it can be found in the queue-3.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 10db8d212864cb6741df7d7fafda5ab6661f6f88 Mon Sep 17 00:00:00 2001
From: Kleber Sacilotto de Souza <[email protected]>
Date: Thu, 12 Jul 2012 17:14:36 +0000
Subject: powerpc/eeh: Check handle_eeh_events() return value
From: Kleber Sacilotto de Souza <[email protected]>
commit 10db8d212864cb6741df7d7fafda5ab6661f6f88 upstream.
Function eeh_event_handler() dereferences the pointer returned by
handle_eeh_events() without checking, causing a crash if NULL was
returned, which is expected in some situations.
This patch fixes this bug by checking for the value returned by
handle_eeh_events() before dereferencing it.
Signed-off-by: Kleber Sacilotto de Souza <[email protected]>
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/powerpc/platforms/pseries/eeh_event.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/arch/powerpc/platforms/pseries/eeh_event.c
+++ b/arch/powerpc/platforms/pseries/eeh_event.c
@@ -85,8 +85,10 @@ static int eeh_event_handler(void * dumm
set_current_state(TASK_INTERRUPTIBLE); /* Don't add to load average */
edev = handle_eeh_events(event);
- eeh_clear_slot(eeh_dev_to_of_node(edev), EEH_MODE_RECOVERING);
- pci_dev_put(edev->pdev);
+ if (edev) {
+ eeh_clear_slot(eeh_dev_to_of_node(edev), EEH_MODE_RECOVERING);
+ pci_dev_put(edev->pdev);
+ }
kfree(event);
mutex_unlock(&eeh_event_mutex);
Patches currently in stable-queue which might be from
[email protected] are
queue-3.5/powerpc-eeh-check-handle_eeh_events-return-value.patch
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