42 lines
1.3 KiB
Diff
42 lines
1.3 KiB
Diff
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From 2d26cf4aed90a77ac5e93ddec29770756027b788 Mon Sep 17 00:00:00 2001
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From: Karl Williamson <khw@cpan.org>
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Date: Fri, 24 May 2019 09:15:59 -0600
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Subject: [PATCH] PATCH: [perl #134134] read beyond end of buffer
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This turns out to be because of a special input case in myatof3(),
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wherein if the input length is 0, it call strlen to find the length.
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The solution is to add a test and not call the function unless the
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length is positive.
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Signed-off-by: Petr Písař <ppisar@redhat.com>
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---
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regcomp.c | 6 ++++--
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1 file changed, 4 insertions(+), 2 deletions(-)
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diff --git a/regcomp.c b/regcomp.c
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index 9bd6dd3739..3ad09c52b2 100644
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--- a/regcomp.c
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+++ b/regcomp.c
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@@ -23428,10 +23428,12 @@ Perl_parse_uniprop_string(pTHX_
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* NV. */
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NV value;
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+ SSize_t value_len = lookup_len - equals_pos;
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/* Get the value */
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- if (my_atof3(lookup_name + equals_pos, &value,
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- lookup_len - equals_pos)
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+ if ( value_len <= 0
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+ || my_atof3(lookup_name + equals_pos, &value,
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+ value_len)
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!= lookup_name + lookup_len)
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{
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goto failed;
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--
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2.20.1
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