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41 lines
1.2 KiB
41 lines
1.2 KiB
4 years ago
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commit 9e0ad3049dbae88d615bfb038e53bf365a39a634
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Author: Florian Weimer <fweimer@redhat.com>
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Date: Sat Nov 11 11:41:45 2017 +0100
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resolv: ns_name_pton should report trailing \ as error [BZ #22413]
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diff --git a/resolv/ns_name.c b/resolv/ns_name.c
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index 08a75e2fe0b4edd6..73213fee2dca530b 100644
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--- a/resolv/ns_name.c
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+++ b/resolv/ns_name.c
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@@ -222,6 +222,11 @@ ns_name_pton(const char *src, u_char *dst, size_t dstsiz)
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}
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*bp++ = (u_char)c;
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}
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+ if (escaped) {
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+ /* Trailing backslash. */
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+ __set_errno (EMSGSIZE);
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+ return -1;
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+ }
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c = (bp - label - 1);
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if ((c & NS_CMPRSFLGS) != 0) { /*%< Label too big. */
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__set_errno (EMSGSIZE);
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diff --git a/resolv/tst-ns_name_pton.c b/resolv/tst-ns_name_pton.c
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index 879d97c9d3816210..73bdb05e08e405dc 100644
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--- a/resolv/tst-ns_name_pton.c
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+++ b/resolv/tst-ns_name_pton.c
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@@ -127,6 +127,13 @@ static const struct test_case tests[] =
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"\377\377", NULL, },
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{ STRING63OCT "." STRING63OCT "." STRING63OCT "." STRING60OCT
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"\377\377\377", NULL, },
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+ { "\\", NULL, },
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+ { "\\\\", "\\\\", false },
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+ { "\\\\.", "\\\\", true },
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+ { "\\\\\\", NULL, },
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+ { "a\\", NULL, },
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+ { "a.\\", NULL, },
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+ { "a.b\\", NULL, },
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};
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static int
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