strace -P: fix handling of invalid syscalls

* pathtrace.c (pathtrace_match): Check the given syscall number using
SCNO_IN_RANGE.

diff --git a/pathtrace.c b/pathtrace.c
index d7ba87cc69d97e2d736a81501ec3e61a8fbbd99e..5fa8be4c7b5d9326bf768020502415910c849492 100644 (file)
--- a/pathtrace.c
+++ b/pathtrace.c
@@ -179,6 +179,9 @@ pathtrace_match(struct tcb *tcp)
        if (selected[0] == NULL)
                return 1;
 
+       if (!SCNO_IN_RANGE(tcp->scno))
+               return 0;
+
        s = &sysent[tcp->scno];
 
        if (!(s->sys_flags & (TRACE_FILE | TRACE_DESC)))