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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Daniel Axtens <dja@axtens.net>
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Date: Wed, 13 Jan 2021 22:19:01 +1100
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Subject: [PATCH] kern/misc: Always set *end in grub_strtoull()
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Currently, if there is an error in grub_strtoull(), *end is not set.
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This differs from the usual behavior of strtoull(), and also means that
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some callers may use an uninitialized value for *end.
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Set *end unconditionally.
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Signed-off-by: Daniel Axtens <dja@axtens.net>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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---
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grub-core/kern/misc.c | 8 ++++++++
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1 file changed, 8 insertions(+)
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diff --git a/grub-core/kern/misc.c b/grub-core/kern/misc.c
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index 97378c48b22..475f3e0ef05 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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@@ -485,6 +485,10 @@ grub_strtoull (const char *str, const char ** const end, int base)
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{
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grub_error (GRUB_ERR_OUT_OF_RANGE,
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N_("overflow is detected"));
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+
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+ if (end)
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+ *end = (char *) str;
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+
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return ~0ULL;
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}
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@@ -496,6 +500,10 @@ grub_strtoull (const char *str, const char ** const end, int base)
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{
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grub_error (GRUB_ERR_BAD_NUMBER,
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N_("unrecognized number"));
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+
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+ if (end)
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+ *end = (char *) str;
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+
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return 0;
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}
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