[lxc-devel] [lxd/master] lxd/seccomp: Fix broken setxattr

[stgraber on Github]

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From dfdce693c584bff9ab78bdfda0724bd48ffdbbf6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?St=C3=A9phane=20Graber?= <stgraber at ubuntu.com>
Date: Mon, 22 Jul 2019 17:59:46 -0400
Subject: [PATCH] lxd/seccomp: Fix broken setxattr
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Signed-off-by: Stéphane Graber <stgraber at ubuntu.com>
---
 lxd/main_forksyscall.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lxd/main_forksyscall.go b/lxd/main_forksyscall.go
index 1f03cc1294..0e352d234c 100644
--- a/lxd/main_forksyscall.go
+++ b/lxd/main_forksyscall.go
@@ -283,6 +283,13 @@ static void forksetxattr()
 		_exit(EXIT_FAILURE);
 	}
 
+	snprintf(path, sizeof(path), "/proc/%d/cwd", pid);
+	cwd_fd = open(path, O_PATH | O_RDONLY | O_CLOEXEC);
+	if (cwd_fd < 0) {
+		fprintf(stderr, "%d", ENOANO);
+		_exit(EXIT_FAILURE);
+	}
+
 	if (setns(mnt_fd, CLONE_NEWNS)) {
 		fprintf(stderr, "%d", ENOANO);
 		_exit(EXIT_FAILURE);