This is a note to let you know that I've just added the patch titled
of/selftest: Fix off-by-one error in removal path
to the 3.17-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:
of-selftest-fix-off-by-one-error-in-removal-path.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c1a2086e2d8c4eb4e8630ba752e911ec180dec67 Mon Sep 17 00:00:00 2001
From: Grant Likely <grant.likely@xxxxxxxxxx>
Date: Wed, 19 Nov 2014 16:22:32 +0000
Subject: of/selftest: Fix off-by-one error in removal path
From: Grant Likely <grant.likely@xxxxxxxxxx>
commit c1a2086e2d8c4eb4e8630ba752e911ec180dec67 upstream.
The removal path for selftest data has an off by one error that causes
the code to dereference beyond the end of the nodes[] array on the first
pass through. The old code only worked by chance on a lot of platforms,
but the bug was recently exposed on aarch64.
The fix is simple. Decrement the node count before dereferencing, not
after.
Reported-by: Kevin Hilman <khilman@xxxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Gaurav Minocha <gaurav.minocha.os@xxxxxxxxx>
---
drivers/of/selftest.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/drivers/of/selftest.c
+++ b/drivers/of/selftest.c
@@ -799,7 +799,7 @@ static void selftest_data_remove(void)
return;
}
- while (last_node_index >= 0) {
+ while (last_node_index-- > 0) {
if (nodes[last_node_index]) {
np = of_find_node_by_path(nodes[last_node_index]->full_name);
if (strcmp(np->full_name, "/aliases") != 0) {
@@ -812,7 +812,6 @@ static void selftest_data_remove(void)
}
}
}
- last_node_index--;
}
}
Patches currently in stable-queue which might be from grant.likely@xxxxxxxxxx are
queue-3.17/of-base-fix-powerpc-address-parsing-hack.patch
queue-3.17/of-selftest-fix-off-by-one-error-in-removal-path.patch
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