30 lines
898 B
Diff
30 lines
898 B
Diff
From b7fe72349401199f804c1a34ed71a7d6bc93c4b9 Mon Sep 17 00:00:00 2001
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From: jackey_1024 <jikui2@huawei.com>
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Date: Fri, 28 Oct 2022 10:15:23 +0800
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Subject: [PATCH] busybox: fix use after free in bc module
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backport from upstream:
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https://git.busybox.net/busybox/commit/?id=41d5f800a14769704082f7faeabb8435285499be
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Signed-off-by: jackey_1024 <jikui2@huawei.com>
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---
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miscutils/bc.c | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/miscutils/bc.c b/miscutils/bc.c
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index e880293..1e9a575 100644
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--- a/miscutils/bc.c
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+++ b/miscutils/bc.c
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@@ -2822,6 +2822,8 @@ static char peek_inbuf(void)
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) {
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xc_read_line(&G.input_buffer, G.prs.lex_input_fp);
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G.prs.lex_inbuf = G.input_buffer.v;
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+ // lex_next_at may point to now-freed data, update it:
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+ G.prs.lex_next_at = G.prs.lex_inbuf;
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if (G.input_buffer.len <= 1) // on EOF, len is 1 (NUL byte)
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G.prs.lex_input_fp = NULL;
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}
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--
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2.25.1
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