[openssh-commits] [openssh] 01/01: Deny lstat syscalls in seccomp sandbox

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djm pushed a commit to branch master
in repository openssh.

commit f64062b1f74ad5ee20a8a49aab2732efd0f7ce30
Author: Damien Miller <djm at mindrot.org>
Date:   Fri May 20 09:56:53 2016 +1000

    Deny lstat syscalls in seccomp sandbox
    
    Avoids sandbox violations for some krb/gssapi libraries.
---
 sandbox-seccomp-filter.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sandbox-seccomp-filter.c b/sandbox-seccomp-filter.c
index d132e26..2e1ed2c 100644
--- a/sandbox-seccomp-filter.c
+++ b/sandbox-seccomp-filter.c
@@ -103,6 +103,12 @@ static const struct sock_filter preauth_insns[] = {
 		offsetof(struct seccomp_data, nr)),
 
 	/* Syscalls to non-fatally deny */
+#ifdef __NR_lstat
+	SC_DENY(lstat, EACCES),
+#endif
+#ifdef __NR_lstat64
+	SC_DENY(lstat64, EACCES),
+#endif
 #ifdef __NR_fstat
 	SC_DENY(fstat, EACCES),
 #endif

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