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-rw-r--r--sys/kern/sys_process.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/kern/sys_process.c b/sys/kern/sys_process.c
index 4740476bdf94..1fd7ef1457ff 100644
--- a/sys/kern/sys_process.c
+++ b/sys/kern/sys_process.c
@@ -330,7 +330,7 @@ ptrace(curp, uap)
case PT_STEP:
case PT_CONTINUE:
case PT_DETACH:
- if ((unsigned)uap->data >= NSIG)
+ if ((uap->req != PT_STEP) && ((unsigned)uap->data >= NSIG))
return EINVAL;
PHOLD(p);