Module: xenomai-jki
Branch: for-forge
Commit: 3ec774595622e208cba4c899e8a5081b7da05fc9
URL:
http://git.xenomai.org/?p=xenomai-jki.git;a=commit;h=3ec774595622e208cba4c899e8a5081b7da05fc9
Author: Jan Kiszka <jan.kis...@siemens.com>
Date: Fri Mar 10 14:04:37 2017 +0100
cobalt/syscall: Handle bogus fastcall gracefully
It's not a kernel bug when userspace issues an invalid syscall from a RT
thread.
Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
---
kernel/cobalt/posix/syscall.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/kernel/cobalt/posix/syscall.c b/kernel/cobalt/posix/syscall.c
index 25d21ea..3c85541 100644
--- a/kernel/cobalt/posix/syscall.c
+++ b/kernel/cobalt/posix/syscall.c
@@ -800,9 +800,13 @@ int ipipe_fastcall_hook(struct pt_regs *regs)
int ret;
ret = handle_head_syscall(&xnsched_realtime_domain, regs);
- XENO_BUG_ON(COBALT, ret == KEVENT_PROPAGATE);
+ if (ret == KEVENT_PROPAGATE) {
+ printk(XENO_WARNING "bad linux syscall <%#lx>\n",
+ __xn_syscall(regs));
+ __xn_error_return(regs, -ENOSYS);
+ }
- return ret;
+ return KEVENT_STOP;
}
long cobalt_restart_syscall_placeholder(struct restart_block *param)
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