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7e98da058f
This change reorganizes and cleanups our patches to reduce the patch number from 314 patches to 187. That's achieved by dropping patches that are later reverted and squashing fixes for earlier patches that introduced features. There are no code changes and the diff with upstream is the same before and after the cleanup. Having fewer patches makes easier to manage the patchset and also will ease to rebase them on top of the latest grub-2.04 release. Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
37 lines
1.2 KiB
Diff
37 lines
1.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aaron Miller <aaronmiller@fb.com>
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Date: Fri, 29 Jul 2016 17:41:27 +0800
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Subject: [PATCH] misc: fix invalid character recongition in strto*l
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Would previously allow digits larger than the base and didn't check that
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subtracting the difference from 0-9 to lowercase letters for characters
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larger than 9 didn't result in a value lower than 9, which allowed the
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parses: ` = 9, _ = 8, ^ = 7, ] = 6, \ = 5, and [ = 4
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---
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grub-core/kern/misc.c | 13 ++++++++-----
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1 file changed, 8 insertions(+), 5 deletions(-)
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diff --git a/grub-core/kern/misc.c b/grub-core/kern/misc.c
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index 0e89c483d5e..5c3899f0e5b 100644
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--- a/grub-core/kern/misc.c
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+++ b/grub-core/kern/misc.c
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@@ -434,11 +434,14 @@ grub_strtoull (const char *str, char **end, int base)
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unsigned long digit;
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digit = grub_tolower (*str) - '0';
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- if (digit >= 'a' - '0')
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- digit += '0' - 'a' + 10;
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- else if (digit > 9)
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- break;
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-
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+ if (digit > 9)
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+ {
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+ digit += '0' - 'a' + 10;
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+ /* digit <= 9 check is needed to keep chars larger than
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+ '9' but less than 'a' from being read as numbers */
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+ if (digit >= (unsigned long) base || digit <= 9)
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+ break;
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+ }
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if (digit >= (unsigned long) base)
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break;
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