From dc6b85bd8b7db23ad6fcd3ad4c57166481582035 Mon Sep 17 00:00:00 2001
From: Stefani Seibold <stefani@seibold.net>
Date: Thu, 12 Apr 2018 11:14:11 +0200
Subject: [PATCH] fix process attach

---
 sysdeps/linux-gnu/proc.c | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/sysdeps/linux-gnu/proc.c b/sysdeps/linux-gnu/proc.c
index aaebd16..8dca9ce 100644
--- a/sysdeps/linux-gnu/proc.c
+++ b/sysdeps/linux-gnu/proc.c
@@ -163,14 +163,14 @@ int process_tasks(pid_t pid, pid_t ** ret_tasks, size_t *ret_n)
 	for(;;) {
 		struct dirent *result;
 
+		errno = 0;
 		result = readdir(d);
-		if (!result) {
-			free(tasks);
-			return -1;
-		}
 
-		if (result == NULL)
+		if (!result) {
+			if (errno)
+				goto fail;
 			break;
+		}
 
 		if (result->d_type == DT_DIR && all_digits(result->d_name)) {
 			pid_t npid = atoi(result->d_name);
@@ -181,10 +181,9 @@ int process_tasks(pid_t pid, pid_t ** ret_tasks, size_t *ret_n)
 				alloc = n > 0 ? (2 * n) : 8;
 
 				ntasks = realloc(tasks, sizeof(*tasks) * alloc);
-				if (!ntasks) {
-					free(tasks);
-					return -1;
-				}
+				if (!ntasks)
+					goto fail;
+
 				tasks = ntasks;
 			}
 			tasks[n++] = npid;
@@ -197,6 +196,14 @@ int process_tasks(pid_t pid, pid_t ** ret_tasks, size_t *ret_n)
 	*ret_n = n;
 
 	return 0;
+fail:
+	free(tasks);
+	closedir(d);
+
+	*ret_tasks = NULL;
+	*ret_n = 0;
+
+	return -1;
 }
 
 /* On native 64-bit system, we need to be careful when handling cross