This system call is required by the DSCP marking feature introduced in commit
6a5665ca5877bad1ae77c906715414aac77d9f77.
Before this change, enabling seccomp filtering (chronyd -F 1) and specifying a
custom DSCP value in the configuration (for example "dscp 46") caused the
process to be killed by seccomp due to IP_TOS not being allowed by the filter.
Tested before and after the change on Ubuntu 21.04, kernel 5.11.0-13-generic.
IP_TOS is available since Linux 1.0, so I didn't add any ifdefs for it.
Signed-off-by: Foster Snowhill <fo...@forstwoof.ru>
---
sys_linux.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sys_linux.c b/sys_linux.c
index 06ec45f..a33887f 100644
--- a/sys_linux.c
+++ b/sys_linux.c
@@ -621,7 +621,7 @@ SYS_Linux_EnableSystemCallFilter(int level,
SYS_ProcessContext context)
};
const static int socket_options[][2] = {
- { SOL_IP, IP_PKTINFO }, { SOL_IP, IP_FREEBIND },
+ { SOL_IP, IP_PKTINFO }, { SOL_IP, IP_FREEBIND }, { SOL_IP, IP_TOS },
#ifdef FEAT_IPV6
{ SOL_IPV6, IPV6_V6ONLY }, { SOL_IPV6, IPV6_RECVPKTINFO },
#endif
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