[openssh-commits] [openssh] 01/01: Deny (non-fatal) ipc in preauth privsep child.

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dtucker pushed a commit to branch master
in repository openssh.

commit 30f704ebc0e9e32b3d12f5d9e8c1b705fdde2c89
Author: Jeremy Drake <github at jdrake.com>
Date:   Fri Oct 11 18:31:05 2019 -0700

    Deny (non-fatal) ipc in preauth privsep child.
    
    As noted in openssh/openssh-portable#149, i386 does not have have
    _NR_shmget etc.  Instead, it has a single ipc syscall (see man 2 ipc,
    https://linux.die.net/man/2/ipc).  Add this syscall, if present, to the
    list of syscalls that seccomp will deny non-fatally.
---
 sandbox-seccomp-filter.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sandbox-seccomp-filter.c b/sandbox-seccomp-filter.c
index 999c46c9..0914e48b 100644
--- a/sandbox-seccomp-filter.c
+++ b/sandbox-seccomp-filter.c
@@ -177,6 +177,9 @@ static const struct sock_filter preauth_insns[] = {
 #ifdef __NR_shmdt
 	SC_DENY(__NR_shmdt, EACCES),
 #endif
+#ifdef __NR_ipc
+	SC_DENY(__NR_ipc, EACCES),
+#endif
 
 	/* Syscalls to permit */
 #ifdef __NR_brk

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