[master] 9796bd9 Fix (insignificant) memory leak with mal-formed ESI directives.

[Poul-Henning Kamp]

commit 9796bd939173e5ddc9bb3b26e5731c19fe776ccd
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Tue Apr 19 16:34:23 2016 +0000

    Fix (insignificant) memory leak with mal-formed ESI directives.
    
    Fixes #1912

diff --git a/bin/varnishd/cache/cache_esi_parse.c b/bin/varnishd/cache/cache_esi_parse.c
index 6ba5eb1..815bac4 100644
--- a/bin/varnishd/cache/cache_esi_parse.c
+++ b/bin/varnishd/cache/cache_esi_parse.c
@@ -820,6 +820,8 @@ VEP_Parse(struct vep_state *vep, const char *p, size_t l)
 				vep_mark_skip(vep, p);
 				vep->in_esi_tag = 0;
 				vep->state = VEP_NEXTTAG;
+				if (vep->attr_vsb)
+					VSB_destroy(&vep->attr_vsb);
 			}
 
 		/******************************************************
@@ -854,6 +856,7 @@ VEP_Parse(struct vep_state *vep, const char *p, size_t l)
 				vep->state = VEP_TAGERROR;
 			}
 		} else if (vep->state == VEP_ATTRGETVAL) {
+			AZ(vep->attr_vsb);
 			vep->attr_vsb = VSB_new_auto();
 			vep->state = VEP_ATTRDELIM;
 		} else if (vep->state == VEP_ATTRDELIM) {