[CRIU] [PATCH] sk-queue: Use int values in getsockopt

[Cyrill Gorcunov]

The kernel threats them as interger values so
we should declare them this way. Moreover, explicitly
clean them up to eliminate side effects.

Initially I hit a problem where high bits of long "size"
variable was containing some crap from stack and in result
I've got errors like

 | Error (sk-queue.c:102): dump_sk_queue: Can't allocate 171798904800 bytes
 | Error (cr-dump.c:1289): Dump files (pid: 2505) failed with -1

Signed-off-by: Cyrill Gorcunov <gorcunov at openvz.org>
---
 sk-queue.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/sk-queue.c b/sk-queue.c
index 7c29037..c849951 100644
--- a/sk-queue.c
+++ b/sk-queue.c
@@ -59,14 +59,14 @@ int read_sk_queues(void)
 int dump_sk_queue(int sock_fd, int sock_id)
 {
 	struct sk_packet_entry *pe;
-	unsigned long size;
+	int ret, size, orig_peek_off;
 	socklen_t tmp;
-	int ret, orig_peek_off;
 
 	/*
 	 * Save original peek offset.
 	 */
 	tmp = sizeof(orig_peek_off);
+	orig_peek_off = 0;
 	ret = getsockopt(sock_fd, SOL_SOCKET, SO_PEEK_OFF, &orig_peek_off, &tmp);
 	if (ret < 0) {
 		pr_perror("getsockopt failed\n");
@@ -76,6 +76,7 @@ int dump_sk_queue(int sock_fd, int sock_id)
 	 * Discover max DGRAM size
 	 */
 	tmp = sizeof(size);
+	size = 0;
 	ret = getsockopt(sock_fd, SOL_SOCKET, SO_SNDBUF, &size, &tmp);
 	if (ret < 0) {
 		pr_perror("getsockopt failed\n");
-- 
1.7.7.6