[dm-devel] [PATCH 03/42] Fixup pathgroup allocation in disassemble_map()

[Hannes Reinecke]

The check for empty path groups in disassemble_map() is not quite
correct; we might end up removing the pathgroup vector even though
there are some entries in it.

Signed-off-by: Hannes Reinecke <hare at suse.de>
---
 libmultipath/dmparser.c |   15 +++++++++------
 1 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/libmultipath/dmparser.c b/libmultipath/dmparser.c
index b3c52fc..a45854d 100644
--- a/libmultipath/dmparser.c
+++ b/libmultipath/dmparser.c
@@ -232,13 +232,16 @@ disassemble_map (vector pathvec, char * params, struct multipath * mpp)
 	num_pg = atoi(word);
 	FREE(word);
 
-	if (num_pg > 0 && !mpp->pg) {
-		mpp->pg = vector_alloc();
-
-		if (!mpp->pg)
-			return 1;
-	} else
+	if (num_pg > 0) {
+		if (!mpp->pg) {
+			mpp->pg = vector_alloc();
+			if (!mpp->pg)
+				return 1;
+		}
+	} else {
+		free_pgvec(mpp->pg, KEEP_PATHS);
 		mpp->pg = NULL;
+	}
 
 	/*
 	 * first pg to try
-- 
1.7.4.2