From: Nick Mathewson <nickm@torproject.org>
Date: Fri, 16 Jun 2017 18:03:02 +0000 (-0400)
Subject: Permit the fchmod system call.
X-Git-Tag: tor-0.2.9.12~31^2^2
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=59f29970fa78bec8c01bd5f16edca8c24b8724f5;p=thirdparty%2Ftor.git

Permit the fchmod system call.

Fixes bug 22516; bugfix on 0.2.5.4-alpha.
---

diff --git a/changes/bug22516 b/changes/bug22516
new file mode 100644
index 0000000000..f024a3c470
--- /dev/null
+++ b/changes/bug22516
@@ -0,0 +1,5 @@
+  o Minor bugfixes (linux seccomp2 sandbox):
+    - Permit the fchmod system call, to avoid crashing on startup when
+      starting with the seccomp2 sandbox and an unexpected set of permissions
+      on the data directory or its contents. Fixes bug 22516; bugfix on
+      0.2.5.4-alpha.
diff --git a/src/common/sandbox.c b/src/common/sandbox.c
index 95c9f83b8d..da96ad8248 100644
--- a/src/common/sandbox.c
+++ b/src/common/sandbox.c
@@ -135,6 +135,9 @@ static int filter_nopar_gen[] = {
 #endif
 #ifdef HAVE_PIPE
     SCMP_SYS(pipe),
+#endif
+#ifdef __NR_fchmod
+    SCMP_SYS(fchmod),
 #endif
     SCMP_SYS(fcntl),
     SCMP_SYS(fstat),