From: Oleg Lyovin <olegartys@gmail.com>
Date: Thu, 12 Oct 2023 16:47:05 +0000 (+0300)
Subject: privsep: allow __NR_mmap2 syscall (#253)
X-Git-Tag: v10.0.4~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6ada94b8561f3e96fdd84d445a2dcbed7c8c9a5f;p=thirdparty%2Fdhcpcd.git

privsep: allow __NR_mmap2 syscall (#253)

The issue occured while compiled by musl toolchain:

    mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = ?
    +++ killed by SIGSYS +++

This patchs allows seccomp to make __NR_mmap2 syscall.

Signed-off-by: Oleg Lyovin <ovlevin@sberdevices.ru>
---

diff --git a/src/privsep-linux.c b/src/privsep-linux.c
index 67ed0d73..6201b207 100644
--- a/src/privsep-linux.c
+++ b/src/privsep-linux.c
@@ -364,6 +364,9 @@ static struct sock_filter ps_seccomp_filter[] = {
 #ifdef __NR_mmap
 	SECCOMP_ALLOW(__NR_mmap),
 #endif
+#ifdef __NR_mmap2
+	SECCOMP_ALLOW(__NR_mmap2),
+#endif
 #ifdef __NR_munmap
 	SECCOMP_ALLOW(__NR_munmap),
 #endif