memory leak in rds_send

memory leak in rds_send_probe
Status: upstream: reported C repro on 2019/07/23 16:18
Reported-by: syzbot+5134cdf021c4ed5aaa5f@syzkaller.appspotmail.com
First crash: 379d, last: 32d

Cause bisection: introduced by (bisect log):

commit af49a63e101eb62376cc1d6bd25b97eb8c691d54
Author: Matthew Wilcox <willy@linux.intel.com>
Date: Sat May 21 00:03:33 2016 +0000

radix-tree: change naming conventions in radix_tree_shrink

Crash: memory leak in next_bio (log)
Repro: C syz .config

Sample crash report:

executing program
executing program
BUG: memory leak
unreferenced object 0xffff8881197ae600 (size 512):
  comm "kworker/u4:2", pid 47, jiffies 4294942909 (age 14.090s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 08 e6 7a 19 81 88 ff ff  ..........z.....
    08 e6 7a 19 81 88 ff ff 18 e6 7a 19 81 88 ff ff  ..z.......z.....
  backtrace:
    [<000000002d53c6de>] kmalloc include/linux/slab.h:560 [inline]
    [<000000002d53c6de>] kzalloc include/linux/slab.h:669 [inline]
    [<000000002d53c6de>] rds_message_alloc+0x34/0xc0 net/rds/message.c:291
    [<00000000c38ca58a>] rds_send_probe.constprop.0+0x42/0x370 net/rds/send.c:1433
    [<0000000091c6b97f>] rds_recv_incoming+0x487/0x5c0 net/rds/recv.c:343
    [<00000000db5d161b>] rds_loop_xmit+0x7b/0xf0 net/rds/loop.c:96
    [<00000000f9d22502>] rds_send_xmit+0x594/0xb90 net/rds/send.c:367
    [<000000005a0de6b4>] rds_send_worker+0x36/0x150 net/rds/threads.c:200
    [<0000000085fd675e>] process_one_work+0x213/0x4d0 kernel/workqueue.c:2269
    [<00000000e141ac13>] worker_thread+0x58/0x4b0 kernel/workqueue.c:2415
    [<00000000b288aba5>] kthread+0x164/0x190 kernel/kthread.c:291
    [<000000004571a1f4>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293

BUG: memory leak
unreferenced object 0xffff88811ea9c400 (size 512):
  comm "syz-executor094", pid 6491, jiffies 4294943515 (age 8.030s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 08 c4 a9 1e 81 88 ff ff  ................
    08 c4 a9 1e 81 88 ff ff 18 c4 a9 1e 81 88 ff ff  ................
  backtrace:
    [<000000002d53c6de>] kmalloc include/linux/slab.h:560 [inline]
    [<000000002d53c6de>] kzalloc include/linux/slab.h:669 [inline]
    [<000000002d53c6de>] rds_message_alloc+0x34/0xc0 net/rds/message.c:291
    [<00000000c38ca58a>] rds_send_probe.constprop.0+0x42/0x370 net/rds/send.c:1433
    [<0000000091c6b97f>] rds_recv_incoming+0x487/0x5c0 net/rds/recv.c:343
    [<00000000db5d161b>] rds_loop_xmit+0x7b/0xf0 net/rds/loop.c:96
    [<00000000f9d22502>] rds_send_xmit+0x594/0xb90 net/rds/send.c:367
    [<00000000b6ac9987>] rds_sendmsg+0x117e/0x1430 net/rds/send.c:1381
    [<00000000cf1bb357>] sock_sendmsg_nosec net/socket.c:652 [inline]
    [<00000000cf1bb357>] sock_sendmsg+0x4c/0x60 net/socket.c:672
    [<00000000a3f97e8c>] __sys_sendto+0x11d/0x1c0 net/socket.c:1995
    [<00000000df7be623>] __do_sys_sendto net/socket.c:2007 [inline]
    [<00000000df7be623>] __se_sys_sendto net/socket.c:2003 [inline]
    [<00000000df7be623>] __x64_sys_sendto+0x26/0x30 net/socket.c:2003
    [<00000000b2c48037>] do_syscall_64+0x4c/0xe0 arch/x86/entry/common.c:359
    [<000000004777b66c>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

Crashes (23):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-gce-leak	2020/07/04 10:30	upstream	7cc2a8ea	51095195	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2020/05/17 00:44	upstream	3d1c1e59	37bccd4e	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2020/04/07 14:55	upstream	7e634208	99a96044	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2020/03/19 05:48	upstream	5076190d	0a96a13c	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2020/03/17 11:57	upstream	fb33c651	749688d2	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2020/03/14 11:24	upstream	fffb08b3	749688d2	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2020/03/12 16:49	upstream	e6e6ec48	d850e9d0	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2020/03/03 06:42	upstream	63623fd4	c88c7b75	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2020/02/26 17:06	upstream	f8788d86	59b57593	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2020/02/08 06:01	upstream	41dcd67e	06150bf1	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2020/01/31 11:16	upstream	9f68e365	5ed23f9a	.config	log	report	syz	C	davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2020/01/25 03:15	upstream	6381b442	2e95ab33	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2020/01/10 21:15	upstream	e69ec487	4de4e9f0	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2020/01/10 18:38	upstream	e69ec487	4de4e9f0	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2019/12/26 13:03	upstream	46cf053e	be5c2c81	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2019/10/31 17:51	upstream	e472c64a	a41ca8fa	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2019/10/11 11:43	upstream	9e208aa0	1a3bad90	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2019/10/04 07:32	upstream	cc3a7bfe	fc17ba49	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2019/10/04 06:54	upstream	cc3a7bfe	fc17ba49	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2019/09/03 20:25	upstream	089cf7f6	48448e71	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2019/08/28 01:16	upstream	6525771f	fd37b39e	.config	log	report	syz	C	davem@davemloft.net, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com
ci-upstream-gce-leak	2019/07/23 11:19	upstream	c6dd78fc	55e0c077	.config	log	report	syz	C
ci-upstream-gce-leak	2020/04/10 23:16	upstream	c0cc2711	a8c6a3f8	.config	log	report	syz		davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, santosh.shilimkar@oracle.com