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: 208d, last: 9d04h

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
executing program
BUG: memory leak
unreferenced object 0xffff88811b2f5e00 (size 512):
  comm "syz-executor091", pid 7133, jiffies 4294943945 (age 13.860s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 08 5e 2f 1b 81 88 ff ff  .........^/.....
    08 5e 2f 1b 81 88 ff ff 18 5e 2f 1b 81 88 ff ff  .^/......^/.....
  backtrace:
    [<00000000bc99e1db>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<00000000bc99e1db>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000bc99e1db>] slab_alloc mm/slab.c:3320 [inline]
    [<00000000bc99e1db>] __do_kmalloc mm/slab.c:3654 [inline]
    [<00000000bc99e1db>] __kmalloc+0x169/0x300 mm/slab.c:3665
    [<000000006000b77e>] kmalloc include/linux/slab.h:560 [inline]
    [<000000006000b77e>] kzalloc include/linux/slab.h:669 [inline]
    [<000000006000b77e>] rds_message_alloc+0x3e/0xc0 net/rds/message.c:291
    [<000000007489e81b>] rds_send_probe.constprop.0+0x42/0x380 net/rds/send.c:1431
    [<00000000ac0c1748>] rds_send_pong+0x1e/0x23 net/rds/send.c:1494
    [<00000000db206d77>] rds_recv_incoming+0x496/0x5e0 net/rds/recv.c:343
    [<00000000f585a065>] rds_loop_xmit+0x86/0x100 net/rds/loop.c:96
    [<00000000b42bc61a>] rds_send_xmit+0x5a9/0xb40 net/rds/send.c:367
    [<000000005f3d33d2>] rds_sendmsg+0x13fa/0x16d0 net/rds/send.c:1379
    [<000000005b137f9f>] sock_sendmsg_nosec net/socket.c:652 [inline]
    [<000000005b137f9f>] sock_sendmsg+0x54/0x70 net/socket.c:672
    [<00000000a27a87fc>] __sys_sendto+0x148/0x1f0 net/socket.c:1998
    [<00000000d0a0e245>] __do_sys_sendto net/socket.c:2010 [inline]
    [<00000000d0a0e245>] __se_sys_sendto net/socket.c:2006 [inline]
    [<00000000d0a0e245>] __x64_sys_sendto+0x2a/0x30 net/socket.c:2006
    [<0000000025455d90>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294
    [<0000000062f75bed>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

Crashes (13):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
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