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

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djm pushed a commit to branch master
in repository openssh.

commit 3ef92a657444f172b61f92d5da66d94fa8265602
Author: Lonnie Abelbeck <lonnie at abelbeck.com>
Date:   Tue Oct 1 09:05:09 2019 -0500

    Deny (non-fatal) shmget/shmat/shmdt in preauth privsep child.
    
    New wait_random_seeded() function on OpenSSL 1.1.1d uses shmget, shmat, and shmdt
    in the preauth codepath, deny (non-fatal) in seccomp_filter sandbox.
---
 sandbox-seccomp-filter.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/sandbox-seccomp-filter.c b/sandbox-seccomp-filter.c
index 840c5232..39dc289e 100644
--- a/sandbox-seccomp-filter.c
+++ b/sandbox-seccomp-filter.c
@@ -168,6 +168,15 @@ static const struct sock_filter preauth_insns[] = {
 #ifdef __NR_stat64
 	SC_DENY(__NR_stat64, EACCES),
 #endif
+#ifdef __NR_shmget
+	SC_DENY(__NR_shmget, EACCES),
+#endif
+#ifdef __NR_shmat
+	SC_DENY(__NR_shmat, EACCES),
+#endif
+#ifdef __NR_shmdt
+	SC_DENY(__NR_shmdt, EACCES),
+#endif
 
 	/* Syscalls to permit */
 #ifdef __NR_brk

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