From: Roy Marples <roy@marples.name>
Date: Sat, 12 Dec 2020 17:35:45 +0000 (+0000)
Subject: privsep: Allow getsockopt for SO_RCVBUF on Linux
X-Git-Tag: v9.4.0~15
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7a85694c6cad5cde8adfad70a712952b14a90b96;p=thirdparty%2Fdhcpcd.git

privsep: Allow getsockopt for SO_RCVBUF on Linux

For when the link socket overflows
---

diff --git a/src/privsep-linux.c b/src/privsep-linux.c
index 1fbe97fa..050a30cf 100644
--- a/src/privsep-linux.c
+++ b/src/privsep-linux.c
@@ -28,6 +28,7 @@
 
 #include <sys/ioctl.h>
 #include <sys/prctl.h>
+#include <sys/socket.h>
 #include <sys/syscall.h>
 #include <sys/termios.h>	/* For TCGETS */
 
@@ -252,6 +253,11 @@ static struct sock_filter ps_seccomp_filter[] = {
 #ifdef __NR_getpid
 	SECCOMP_ALLOW(__NR_getpid),
 #endif
+#ifdef __NR_getsockopt
+	/* For route socket overflow */
+	SECCOMP_ALLOW_ARG(__NR_getsockopt, 1, SOL_SOCKET),
+	SECCOMP_ALLOW_ARG(__NR_getsockopt, 2, SO_RCVBUF),
+#endif
 #ifdef __NR_ioctl
 	SECCOMP_ALLOW_ARG(__NR_ioctl, 1, SIOCGIFFLAGS),
 	SECCOMP_ALLOW_ARG(__NR_ioctl, 1, SIOCGIFHWADDR),