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When compiled with musl >1.1.20, fastd will crash in case it can't resolve a peers hostname. This is due to a changed implementation of freeaddrinfo in musl 1.1.21 onwards. This segfault is fixed by not calling freeaddrinfo in case the supplied pointer is null. Signed-off-by: David Bauer <mail@david-bauer.net>
36 lines
1.0 KiB
Diff
36 lines
1.0 KiB
Diff
From 9710132c04cd378bd36f16a2a3d98d9c4c5fdbac Mon Sep 17 00:00:00 2001
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From: David Bauer <mail@david-bauer.net>
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Date: Thu, 25 Jul 2019 18:51:25 +0200
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Subject: [PATCH] resolve: fix segmentation fault with musl >1.1.20
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When compiled with musl >1.1.20, fastd will crash in case it can't
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resolve a peers hostname. This is due to a changed implementation of
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freeaddrinfo in musl 1.1.21 onwards.
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This segfault is fixed by not calling freeaddrinfo in case the supplied
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pointer is null.
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Signed-off-by: David Bauer <mail@david-bauer.net>
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---
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src/resolve.c | 4 +++-
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1 file changed, 3 insertions(+), 1 deletion(-)
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diff --git a/src/resolve.c b/src/resolve.c
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index 9bdfa1c..bfd2a59 100644
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--- a/src/resolve.c
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+++ b/src/resolve.c
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@@ -104,7 +104,9 @@ static void * resolve_peer(void *varg) {
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fastd_async_enqueue(ASYNC_TYPE_RESOLVE_RETURN, ret, sizeof(fastd_async_resolve_return_t) + n_addr*sizeof(fastd_peer_address_t));
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- freeaddrinfo(res);
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+ if (res)
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+ freeaddrinfo(res);
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+
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free(arg->hostname);
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free(arg);
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--
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2.20.1
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