47 lines
1.2 KiB
Diff
47 lines
1.2 KiB
Diff
From 4ec641f81717e19198fc6375cf06b514ac381ab9 Mon Sep 17 00:00:00 2001
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From: jackey_1024 <jikui2@huawei.com>
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Date: Sat, 20 Aug 2022 18:07:04 +0800
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Subject: [PATCH] busybox: fix CVE-2022-30065
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backport from upstream:
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https://git.busybox.net/busybox/commit/?id=e63d7cdfdac78c6fd27e9e63150335767592b85e
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Signed-off-by: jackey_1024 <jikui2@huawei.com>
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---
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editors/awk.c | 3 +++
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testsuite/awk.tests | 6 ++++++
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2 files changed, 9 insertions(+)
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diff --git a/editors/awk.c b/editors/awk.c
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index 62cd019..66d2646 100644
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--- a/editors/awk.c
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+++ b/editors/awk.c
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@@ -3094,6 +3094,9 @@ static var *evaluate(node *op, var *res)
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case XC( OC_MOVE ):
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debug_printf_eval("MOVE\n");
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+ /* make sure that we never return a temp var */
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+ if (L.v == TMPVAR0)
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+ L.v = res;
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/* if source is a temporary string, jusk relink it to dest */
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if (R.v == TMPVAR1
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&& !(R.v->type & VF_NUMBER)
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diff --git a/testsuite/awk.tests b/testsuite/awk.tests
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index 64ca9fd..2200488 100755
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--- a/testsuite/awk.tests
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+++ b/testsuite/awk.tests
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@@ -463,4 +463,10 @@ testing "awk \"cmd\" | getline" \
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"HELLO\n" \
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'' ''
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+testing 'awk assign while test' \
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+ "awk '\$1==\$1=\"foo\" {print \$1}'" \
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+ "foo\n" \
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+ "" \
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+ "foo"
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+
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exit $FAILCOUNT
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--
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2.25.1
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