memory leak in tipc_group_create

memory leak in tipc_group_create_member
Status: upstream: reported C repro on 2019/08/02 02:38
Reported-by: syzbot+f95d90c454864b3b5bc9@syzkaller.appspotmail.com
First crash: 203d, last: 10d

Sample crash report:

5] audit: type=1400 audit(1581029034.882:43): avc:  denied  { integrity } for  pid=7245 comm="syz-executor396" lockdown_reason="debugfs access" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=lockdown permissive=1
executing program
executing program
BUG: memory leak
unreferenced object 0xffff8881170ca600 (size 128):
  comm "syz-executor396", pid 7246, jiffies 4294942730 (age 12.380s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 18 a6 0c 17 81 88 ff ff  ................
  backtrace:
    [<0000000073f48ad1>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<0000000073f48ad1>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<0000000073f48ad1>] slab_alloc mm/slab.c:3320 [inline]
    [<0000000073f48ad1>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3549
    [<00000000d0b2bf07>] kmalloc include/linux/slab.h:555 [inline]
    [<00000000d0b2bf07>] kzalloc include/linux/slab.h:669 [inline]
    [<00000000d0b2bf07>] tipc_group_create_member+0x3c/0x190 net/tipc/group.c:306
    [<0000000087e53ca9>] tipc_group_add_member+0x34/0x40 net/tipc/group.c:327
    [<00000000b54f22cb>] tipc_nametbl_build_group+0x9b/0xf0 net/tipc/name_table.c:714
    [<0000000003e89045>] tipc_sk_join net/tipc/socket.c:2997 [inline]
    [<0000000003e89045>] tipc_setsockopt+0x242/0x4b0 net/tipc/socket.c:3103
    [<000000003a0fec55>] __sys_setsockopt+0x10f/0x220 net/socket.c:2130
    [<00000000102d34e9>] __do_sys_setsockopt net/socket.c:2146 [inline]
    [<00000000102d34e9>] __se_sys_setsockopt net/socket.c:2143 [inline]
    [<00000000102d34e9>] __x64_sys_setsockopt+0x26/0x30 net/socket.c:2143
    [<00000000252c6234>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294
    [<000000007ac6c28b>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff8881170ca580 (size 128):
  comm "syz-executor396", pid 7247, jiffies 4294943245 (age 7.230s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 98 a5 0c 17 81 88 ff ff  ................
  backtrace:
    [<0000000073f48ad1>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline]
    [<0000000073f48ad1>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<0000000073f48ad1>] slab_alloc mm/slab.c:3320 [inline]
    [<0000000073f48ad1>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3549
    [<00000000d0b2bf07>] kmalloc include/linux/slab.h:555 [inline]
    [<00000000d0b2bf07>] kzalloc include/linux/slab.h:669 [inline]
    [<00000000d0b2bf07>] tipc_group_create_member+0x3c/0x190 net/tipc/group.c:306
    [<0000000087e53ca9>] tipc_group_add_member+0x34/0x40 net/tipc/group.c:327
    [<00000000b54f22cb>] tipc_nametbl_build_group+0x9b/0xf0 net/tipc/name_table.c:714
    [<0000000003e89045>] tipc_sk_join net/tipc/socket.c:2997 [inline]
    [<0000000003e89045>] tipc_setsockopt+0x242/0x4b0 net/tipc/socket.c:3103
    [<000000003a0fec55>] __sys_setsockopt+0x10f/0x220 net/socket.c:2130
    [<00000000102d34e9>] __do_sys_setsockopt net/socket.c:2146 [inline]
    [<00000000102d34e9>] __se_sys_setsockopt net/socket.c:2143 [inline]
    [<00000000102d34e9>] __x64_sys_setsockopt+0x26/0x30 net/socket.c:2143
    [<00000000252c6234>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294
    [<000000007ac6c28b>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

Crashes (10):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-gce-leak	2020/02/06 22:50	upstream	4c46bef2	c91cbc9d	.config	log	report	syz	C	davem@davemloft.net, jmaloy@redhat.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tipc-discussion@lists.sourceforge.net, ying.xue@windriver.com
ci-upstream-gce-leak	2020/01/23 07:26	upstream	dbab40bd	3334d684	.config	log	report	syz	C	davem@davemloft.net, jon.maloy@ericsson.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tipc-discussion@lists.sourceforge.net, ying.xue@windriver.com
ci-upstream-gce-leak	2020/01/09 16:03	upstream	b07f636f	ddc3e859	.config	log	report	syz	C	davem@davemloft.net, jon.maloy@ericsson.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tipc-discussion@lists.sourceforge.net, ying.xue@windriver.com
ci-upstream-gce-leak	2019/11/23 06:40	upstream	a6b0373f	598ca6c8	.config	log	report	syz	C	davem@davemloft.net, jon.maloy@ericsson.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tipc-discussion@lists.sourceforge.net, ying.xue@windriver.com
ci-upstream-gce-leak	2019/10/21 07:00	upstream	4fe34d61	8c88c9c1	.config	log	report	syz	C	davem@davemloft.net, jon.maloy@ericsson.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tipc-discussion@lists.sourceforge.net, ying.xue@windriver.com
ci-upstream-gce-leak	2019/10/12 07:52	upstream	9892f9f6	426631dd	.config	log	report	syz	C	davem@davemloft.net, jon.maloy@ericsson.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tipc-discussion@lists.sourceforge.net, ying.xue@windriver.com
ci-upstream-gce-leak	2019/10/10 08:44	upstream	8a8c600d	c4b9981b	.config	log	report	syz	C	davem@davemloft.net, jon.maloy@ericsson.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tipc-discussion@lists.sourceforge.net, ying.xue@windriver.com
ci-upstream-gce-leak	2019/09/06 08:22	upstream	3b47fd5c	040fda58	.config	log	report	syz	C	davem@davemloft.net, jon.maloy@ericsson.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tipc-discussion@lists.sourceforge.net, ying.xue@windriver.com
ci-upstream-gce-leak	2019/07/29 01:08	upstream	a9815a4f	c85e1c5b	.config	log	report	syz	C	davem@davemloft.net, jon.maloy@ericsson.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tipc-discussion@lists.sourceforge.net, ying.xue@windriver.com
ci-upstream-gce-leak	2019/11/13 06:40	upstream	eb094f06	048f2d49	.config	log	report	syz		davem@davemloft.net, jon.maloy@ericsson.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, tipc-discussion@lists.sourceforge.net, ying.xue@windriver.com