42 lines
1.0 KiB
Diff
42 lines
1.0 KiB
Diff
From 4dbf9c7e15420eb06540bb426bf36c434787e344 Mon Sep 17 00:00:00 2001
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From: Yannick Brosseau <scientist@fb.com>
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Date: Thu, 3 Jul 2014 13:55:19 -0700
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Subject: [PATCH 1/9] Don't go past the last element of indexVars in
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findEntryByPath
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We add a chance of creating an infinite loop, because we
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were reading memory past the last element of indexVars set to -1.
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This issue was only apparent with -O2, probably because the way the
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memory was initialized.
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Signed-off-by: Yannick Brosseau <scientist@fb.com>
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---
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grubby.c | 8 +++++---
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1 file changed, 5 insertions(+), 3 deletions(-)
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diff --git a/grubby.c b/grubby.c
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index 88a1f08..db91364 100644
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--- a/grubby.c
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+++ b/grubby.c
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@@ -1959,11 +1959,13 @@ struct singleEntry * findEntryByPath(struct grubConfig * config,
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}
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indexVars[i + 1] = -1;
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-
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+
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i = 0;
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if (index) {
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- while (i < *index) i++;
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- if (indexVars[i] == -1) return NULL;
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+ while (i < *index) {
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+ i++;
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+ if (indexVars[i] == -1) return NULL;
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+ }
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}
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entry = findEntryByIndex(config, indexVars[i]);
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--
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1.9.3
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