Module: xenomai-jki
Branch: for-forge
Commit: 92fadda472ad755db2d7b9443d3b2108a35e5d14
URL:
http://git.xenomai.org/?p=xenomai-jki.git;a=commit;h=92fadda472ad755db2d7b9443d3b2108a35e5d14
Author: Jan Kiszka <jan.kis...@siemens.com>
Date: Mon Jul 24 14:22:29 2017 +0200
cobalt/syscall: Filter out invalid Linux syscalls
Suggested by Philippe Gerum: Instead of propagating them down the
pipeline, triggering a XENO_BUG_ON in ipipe_fastcall_hook, catch invalid
Linux syscalls early and terminate them immediately.
Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
---
kernel/cobalt/posix/syscall.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/cobalt/posix/syscall.c b/kernel/cobalt/posix/syscall.c
index 0f905bf..8edba1f 100644
--- a/kernel/cobalt/posix/syscall.c
+++ b/kernel/cobalt/posix/syscall.c
@@ -26,6 +26,7 @@
#include <cobalt/kernel/vdso.h>
#include <cobalt/kernel/init.h>
#include <asm-generic/xenomai/mayday.h>
+#include <asm/syscall.h>
#include "internal.h"
#include "thread.h"
#include "sched.h"
@@ -656,6 +657,8 @@ linux_syscall:
*/
return KEVENT_PROPAGATE;
+ if (__xn_reg_sys(regs) >= NR_syscalls)
+ goto bad_syscall;
/*
* From now on, we know that we have a valid shadow thread
* pointer.
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