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[PULL,01/03] seccomp: add cacheflush to whitelist

Message ID 1447664947-31044-2-git-send-email-eduardo.otubo@profitbricks.com
State New
Headers show

Commit Message

Eduardo Otubo Nov. 16, 2015, 9:09 a.m. UTC 
From: Andrew Jones <drjones@redhat.com>

cacheflush is an arm-specific syscall that qemu built for arm
uses. Add it to the whitelist, but only if we're linking with
a recent enough libseccomp.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Acked-by: Eduardo Otubo <eduardo.otubo@profitbricks.com>
---
 qemu-seccomp.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/qemu-seccomp.c b/qemu-seccomp.c
index 80d034a..c831fe8 100644
--- a/qemu-seccomp.c
+++ b/qemu-seccomp.c
@@ -16,6 +16,14 @@ 
 #include <seccomp.h>
 #include "sysemu/seccomp.h"
 
+#if SCMP_VER_MAJOR >= 3
+  #define HAVE_CACHEFLUSH
+#elif SCMP_VER_MAJOR == 2 && SCMP_VER_MINOR >= 3
+  #define HAVE_CACHEFLUSH
+#elif SCMP_VER_MAJOR == 2 && SCMP_VER_MINOR == 2 && SCMP_VER_MICRO >= 3
+  #define HAVE_CACHEFLUSH
+#endif
+
 struct QemuSeccompSyscall {
     int32_t num;
     uint8_t priority;
@@ -238,7 +246,10 @@  static const struct QemuSeccompSyscall seccomp_whitelist[] = {
     { SCMP_SYS(inotify_init1), 240 },
     { SCMP_SYS(inotify_add_watch), 240 },
     { SCMP_SYS(mbind), 240 },
-    { SCMP_SYS(memfd_create), 240 }
+    { SCMP_SYS(memfd_create), 240 },
+#ifdef HAVE_CACHEFLUSH
+    { SCMP_SYS(cacheflush), 240 },
+#endif
 };
 
 int seccomp_start(void)