[PATCH 07/12] iphlpapi: Make sure there's no gap between the ICMP_ECHO_REPLY array and the data.
Gabriel Ivăncescu
gabrielopcode at gmail.com
Wed Sep 23 09:28:28 CDT 2020
Signed-off-by: Gabriel Ivăncescu <gabrielopcode at gmail.com>
---
dlls/iphlpapi/icmp.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/dlls/iphlpapi/icmp.c b/dlls/iphlpapi/icmp.c
index 79fd35f..d59bb4b 100644
--- a/dlls/iphlpapi/icmp.c
+++ b/dlls/iphlpapi/icmp.c
@@ -309,6 +309,25 @@ static DWORD icmp_get_reply(int sid, unsigned char *buffer, DWORD send_time, voi
if (res==0)
SetLastError(IP_REQ_TIMED_OUT);
done:
+ if (res)
+ {
+ /* Move the data so there's no gap between it and the ICMP_ECHO_REPLY array */
+ DWORD gap_size = endbuf - (char*)ier;
+
+ if (gap_size)
+ {
+ memmove(ier, endbuf, ((char*)reply_buf + reply_size) - endbuf);
+
+ /* Fix the pointers */
+ while (ier-- != reply_buf)
+ {
+ ier->Data = (char*)ier->Data - gap_size;
+ if (ier->Options.OptionsData)
+ ier->Options.OptionsData -= gap_size;
+ }
+ }
+ }
+
HeapFree(GetProcessHeap(), 0, buffer);
TRACE("received %d replies\n",res);
return res;
--
2.21.0
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