9pfs: handle walk of ".." in the root directory

[mirror_qemu.git] / qemu-seccomp.c

diff --git a/qemu-seccomp.c b/qemu-seccomp.c
index 2866e3c2a6605d8432d8e0156cd830fccdadaada..cb569dc05829ff3c877f3274b44f5aab6d25986a 100644 (file)
--- a/qemu-seccomp.c
+++ b/qemu-seccomp.c
@@ -16,11 +16,13 @@
 #include <seccomp.h>
 #include "sysemu/seccomp.h"
 
+/* For some architectures (notably ARM) cacheflush is not supported until
+ * libseccomp 2.2.3, but configure enforces that we are using a more recent
+ * version on those hosts, so it is OK for this check to be less strict.
+ */
 #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
+#elif SCMP_VER_MAJOR == 2 && SCMP_VER_MINOR >= 2
   #define HAVE_CACHEFLUSH
 #endif
 
@@ -250,6 +252,7 @@ static const struct QemuSeccompSyscall seccomp_whitelist[] = {
 #ifdef HAVE_CACHEFLUSH
     { SCMP_SYS(cacheflush), 240 },
 #endif
+    { SCMP_SYS(sysinfo), 240 },
 };
 
 int seccomp_start(void)