[PATCH 2/2] wpcap: Fix crash on pcap_loop(try 5)

Jianqiu Zhang zhangjianqiu_133 at yeah.net
Sun Feb 14 08:52:23 CST 2016


From 267ed1132224bb58718ab0de91527286fbed8e09 Mon Sep 17 00:00:00 2001
From: Jianqiu Zhang <zhangjianqiu_133 at yeah.net>
Date: Tue, 5 Jan 2016 09:12:42 +0800
Subject: [PATCH 2/2] wpcap: Fix crash on pcap_loop

Signed-off-by: Jianqiu Zhang <zhangjianqiu_133 at yeah.net>
---
 dlls/wpcap/wpcap.c | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/dlls/wpcap/wpcap.c b/dlls/wpcap/wpcap.c
index b3bb6a5..3704558 100644
--- a/dlls/wpcap/wpcap.c
+++ b/dlls/wpcap/wpcap.c
@@ -98,7 +98,6 @@ static void pcap_handler_callback(u_char *user_data, const struct pcap_pkthdr *h
     TRACE("(%p %p %p)\n", user_data, h, p);
     pcb = (PCAP_HANDLER_CALLBACK *)user_data;
     pcb->pfn_cb(pcb->user_data, h, p);
-    HeapFree(GetProcessHeap(), 0, pcb);
     TRACE("Callback COMPLETED\n");
 }
 
@@ -110,11 +109,10 @@ int CDECL wine_pcap_dispatch(pcap_t *p, int cnt,
 
     if (callback)
     {
-        PCAP_HANDLER_CALLBACK *pcb;
-        pcb = HeapAlloc(GetProcessHeap(), 0, sizeof(PCAP_HANDLER_CALLBACK));
-        pcb->pfn_cb = callback;
-        pcb->user_data = user;
-        return pcap_dispatch(p, cnt, pcap_handler_callback, (unsigned char*)pcb);
+        PCAP_HANDLER_CALLBACK pcb;
+        pcb.pfn_cb = callback;
+        pcb.user_data = user;
+        return pcap_dispatch(p, cnt, pcap_handler_callback, (unsigned char *)&pcb);
     }
 
     return pcap_dispatch(p, cnt, NULL, user);
@@ -203,11 +201,10 @@ int CDECL wine_pcap_loop(pcap_t *p, int cnt,
 
     if (callback)
     {
-        PCAP_HANDLER_CALLBACK *pcb;
-        pcb = HeapAlloc(GetProcessHeap(), 0, sizeof(PCAP_HANDLER_CALLBACK));
-        pcb->pfn_cb = callback;
-        pcb->user_data = user;
-        return pcap_loop(p, cnt, pcap_handler_callback, (unsigned char*)pcb);
+        PCAP_HANDLER_CALLBACK pcb;
+        pcb.pfn_cb = callback;
+        pcb.user_data = user;
+        return pcap_loop(p, cnt, pcap_handler_callback, (unsigned char *)&pcb);
     }
 
     return pcap_loop(p, cnt, NULL, user);
-- 
2.7.1
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