1 files changed, 60 insertions, 0 deletions
diff --git a/meta-networking/recipes-protocols/mdns/mdns/0008-Handle-errors-from-socket-calls.patch b/meta-networking/recipes-protocols/mdns/mdns/0008-Handle-errors-from-socket-calls.patch
new file mode 100644
index 0000000000..1789001e14
--- /dev/null
+++ b/meta-networking/recipes-protocols/mdns/mdns/0008-Handle-errors-from-socket-calls.patch
@@ -0,0 +1,60 @@
+From ed58146d3aeecdb9920fdc017f85c18b5b10f2db Mon Sep 17 00:00:00 2001
+From: Nate Karstens <nate.karstens@garmin.com>
+Date: Thu, 10 Aug 2017 08:27:32 -0500
+Subject: [PATCH 8/8] Handle errors from socket calls
+
+Adds handling for socket() or read() returning a
+negative value (indicating an error has occurred).
+
+Upstream-Status: Submitted [dts@apple.com]
+
+Signed-off-by: Nate Karstens <nate.karstens@garmin.com>
+Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
+---
+ mDNSPosix/mDNSPosix.c | 12 +++++++++---
+ 1 file changed, 9 insertions(+), 3 deletions(-)
+
+Index: mDNSResponder/mDNSPosix/mDNSPosix.c
+===================================================================
+--- mDNSResponder.orig/mDNSPosix/mDNSPosix.c
++++ mDNSResponder/mDNSPosix/mDNSPosix.c
+@@ -1677,7 +1677,7 @@ mDNSlocal void          ProcessRoutingNo
+ // Read through the messages on sd and if any indicate that any interface records should
+ // be torn down and rebuilt, return affected indices as a bitmask. Otherwise return 0.
+ {
+-    ssize_t readCount;
++    ssize_t readVal, readCount;
+     char buff[4096];
+     struct nlmsghdr         *pNLMsg = (struct nlmsghdr*) buff;
+ 
+@@ -1686,7 +1686,10 @@ mDNSlocal void          ProcessRoutingNo
+     // enough to hold all pending data and so avoid message fragmentation.
+     // (Note that FIONREAD is not supported on AF_NETLINK.)
+ 
+-    readCount = read(sd, buff, sizeof buff);
++    readVal = read(sd, buff, sizeof buff);
++    if (readVal < 0) return;
++    readCount = readVal;
++
+     while (1)
+     {
+         // Make sure we've got an entire nlmsghdr in the buffer, and payload, too.
+@@ -1702,7 +1705,9 @@ mDNSlocal void          ProcessRoutingNo
+                 pNLMsg = (struct nlmsghdr*) buff;
+ 
+                 // read more data
+-                readCount += read(sd, buff + readCount, sizeof buff - readCount);
++                readVal = read(sd, buff + readCount, sizeof buff - readCount);
++                if (readVal < 0) return;
++                readCount += readVal;
+                 continue;                   // spin around and revalidate with new readCount
+             }
+             else
+@@ -2017,6 +2022,7 @@ mDNSlocal mDNSBool mDNSPlatformInit_CanR
+     int err;
+     int s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+     struct sockaddr_in s5353;
++    if (s < 0) return mDNSfalse;
+     s5353.sin_family      = AF_INET;
+     s5353.sin_port        = MulticastDNSPort.NotAnInteger;
+     s5353.sin_addr.s_addr = 0;