random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
random: sshd: uninitialized urandom read (32 bytes read)
audit: type=1400 audit(1582804520.321:36): avc:  denied  { map } for  pid=7456 comm="syz-executor557" path="/root/syz-executor557152458" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
==================================================================
BUG: KASAN: slab-out-of-bounds in tipc_nametbl_lookup_dst_nodes+0x44c/0x4c0 net/tipc/name_table.c:670
Read of size 4 at addr ffff88809aeafc50 by task syz-executor557/7456

CPU: 1 PID: 7456 Comm: syz-executor557 Not tainted 4.14.171-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x13e/0x194 lib/dump_stack.c:58
 print_address_description.cold+0x7c/0x1e2 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report mm/kasan/report.c:409 [inline]
 kasan_report.cold+0xa9/0x2ae mm/kasan/report.c:393
 tipc_nametbl_lookup_dst_nodes+0x44c/0x4c0 net/tipc/name_table.c:670
 tipc_sendmcast+0x599/0xb60 net/tipc/socket.c:767
 __tipc_sendmsg+0xbc5/0xfd0 net/tipc/socket.c:971
 tipc_sendmsg+0x4c/0x70 net/tipc/socket.c:919
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xc5/0x100 net/socket.c:656
 ___sys_sendmsg+0x70a/0x840 net/socket.c:2062
 __sys_sendmsg+0xa3/0x120 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0x27/0x40 net/socket.c:2103
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x4401b9
RSP: 002b:00007ffeda62be38 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401b9
RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a40
R13: 0000000000401ad0 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 1:
 save_stack+0x32/0xa0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc mm/kasan/kasan.c:551 [inline]
 kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529
 kmem_cache_alloc_trace+0x14d/0x7b0 mm/slab.c:3618
 kmalloc include/linux/slab.h:488 [inline]
 kmalloc_array include/linux/slab.h:606 [inline]
 kcalloc include/linux/slab.h:618 [inline]
 tipc_subseq_alloc net/tipc/name_table.c:141 [inline]
 tipc_nameseq_create+0x7e/0x2d0 net/tipc/name_table.c:152
 tipc_nametbl_insert_publ+0x6b1/0x1450 net/tipc/name_table.c:476
 tipc_nametbl_publish+0x211/0x3f0 net/tipc/name_table.c:701
 tipc_sk_publish net/tipc/socket.c:2203 [inline]
 tipc_bind+0x2c4/0x600 net/tipc/socket.c:629
 tipc_create_listen_sock net/tipc/server.c:338 [inline]
 tipc_open_listening_sock net/tipc/server.c:396 [inline]
 tipc_server_start+0x31f/0x880 net/tipc/server.c:611
 tipc_topsrv_start net/tipc/subscr.c:382 [inline]
 tipc_topsrv_init_net+0x53b/0x730 net/tipc/subscr.c:397
 ops_init+0xa5/0x3c0 net/core/net_namespace.c:118
 __register_pernet_operations net/core/net_namespace.c:881 [inline]
 register_pernet_operations net/core/net_namespace.c:955 [inline]
 register_pernet_operations+0x32f/0x710 net/core/net_namespace.c:938
 register_pernet_device+0x28/0x70 net/core/net_namespace.c:1043
 tipc_init+0x7d/0x137 net/tipc/core.c:131
 do_one_initcall+0x88/0x202 init/main.c:824
 do_initcall_level init/main.c:890 [inline]
 do_initcalls init/main.c:898 [inline]
 do_basic_setup init/main.c:916 [inline]
 kernel_init_freeable+0x465/0x526 init/main.c:1073
 kernel_init+0xd/0x15b init/main.c:998
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff88809aeafc40
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 16 bytes inside of
 32-byte region [ffff88809aeafc40, ffff88809aeafc60)
The buggy address belongs to the page:
page:ffffea00026babc0 count:1 mapcount:0 mapping:ffff88809aeaf000 index:0xffff88809aeaffc1
flags: 0xfffe0000000100(slab)
raw: 00fffe0000000100 ffff88809aeaf000 ffff88809aeaffc1 0000000100000033
raw: ffffea00026b4ae0 ffffea0002499820 ffff88812fe561c0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809aeafb00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
 ffff88809aeafb80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc
>ffff88809aeafc00: 00 00 fc fc fc fc fc fc 00 00 fc fc fc fc fc fc
                                                 ^
 ffff88809aeafc80: 00 00 00 00 fc fc fc fc fb fb fb fb fc fc fc fc
 ffff88809aeafd00: fb fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc
==================================================================