From ca895af355cc98dfba4bacf82bda6174b96b8509 Mon Sep 17 00:00:00 2001
From: Andriy Gapon <avg@FreeBSD.org>
Date: Sat, 6 Oct 2012 20:16:04 +0000
Subject: [PATCH] kvm_getprocs: gracefully handle errors from kvm_deadprocs

and don't confuse callers with incorrect return value

MFC after:	9 days
---
 lib/libkvm/kvm_proc.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/lib/libkvm/kvm_proc.c b/lib/libkvm/kvm_proc.c
index d1daf77ef8f..31258d7a09b 100644
--- a/lib/libkvm/kvm_proc.c
+++ b/lib/libkvm/kvm_proc.c
@@ -593,9 +593,15 @@ liveout:
 
 		nprocs = kvm_deadprocs(kd, op, arg, nl[1].n_value,
 				      nl[2].n_value, nprocs);
+		if (nprocs <= 0) {
+			_kvm_freeprocs(kd);
+			nprocs = 0;
+		}
 #ifdef notdef
-		size = nprocs * sizeof(struct kinfo_proc);
-		(void)realloc(kd->procbase, size);
+		else {
+			size = nprocs * sizeof(struct kinfo_proc);
+			kd->procbase = realloc(kd->procbase, size);
+		}
 #endif
 	}
 	*cnt = nprocs;