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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Benjamin Marzinski <bmarzins@redhat.com>
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Date: Mon, 4 Jan 2021 21:59:54 -0600
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Subject: [PATCH] libmultipath: check for null wwid before strcmp
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Commit 749aabd0 (libmultipath: ignore multipaths sections without wwid
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option) removed all mpentries with a NULL wwid, but didn't stop strcmp()
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from being run on them in merge_mptable(). The result of strcmp() with
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a NULL parameter is undefined, so fix that.
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Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
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Reviewed-by: Martin Wilck <mwilck@suse.com>
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Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
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---
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libmultipath/config.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/libmultipath/config.c b/libmultipath/config.c
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index dc81c994..dd645f17 100644
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--- a/libmultipath/config.c
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+++ b/libmultipath/config.c
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@@ -453,7 +453,7 @@ void merge_mptable(vector mptable)
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}
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j = i + 1;
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vector_foreach_slot_after(mptable, mp2, j) {
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- if (strcmp(mp1->wwid, mp2->wwid))
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+ if (!mp2->wwid || strcmp(mp1->wwid, mp2->wwid))
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continue;
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condlog(1, "%s: duplicate multipath config section for %s",
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__func__, mp1->wwid);
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--
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2.17.2
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