From: Paul Moore <pmoore@redhat.com>
Date: Wed, 15 Jan 2014 19:38:51 +0000 (-0500)
Subject: seccomp: add mkdir() and fchmod() to the whitelist
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=0c2acb163fbb4579dad2d45595570b0a9ff71149;p=qemu.git

seccomp: add mkdir() and fchmod() to the whitelist

The PulseAudio library attempts to do a mkdir(2) and fchmod(2) on
"/run/user/<UID>/pulse" which is currently blocked by the syscall
filter; this patch adds the two missing syscalls to the whitelist.
You can reproduce this problem with the following command:

 # qemu -monitor stdio -device intel-hda -device hda-duplex

If watched under strace the following syscalls are shown:

 mkdir("/run/user/0/pulse", 0700)
 fchmod(11, 0700) [NOTE: 11 is the fd for /run/user/0/pulse]

Reported-by: xuhan@redhat.com
Signed-off-by: Paul Moore <pmoore@redhat.com>
---

diff --git a/qemu-seccomp.c b/qemu-seccomp.c
index b7c125364c..89f244fcb2 100644
--- a/qemu-seccomp.c
+++ b/qemu-seccomp.c
@@ -220,7 +220,9 @@ static const struct QemuSeccompSyscall seccomp_whitelist[] = {
     { SCMP_SYS(io_cancel), 241 },
     { SCMP_SYS(io_setup), 241 },
     { SCMP_SYS(io_destroy), 241 },
-    { SCMP_SYS(arch_prctl), 240 }
+    { SCMP_SYS(arch_prctl), 240 },
+    { SCMP_SYS(mkdir), 240 },
+    { SCMP_SYS(fchmod), 240 }
 };
 
 int seccomp_start(void)