tipc: 32-bit node address hash set to fbff1eac
tipc: 32-bit node address hash set to fbff1eac
==================================================================
BUG: KASAN: use-after-free in tipc_named_reinit+0x1aa/0x360 net/tipc/name_distr.c:344
Read of size 8 at addr ffff8881ce4ae000 by task kworker/0:64/28952

CPU: 0 PID: 28952 Comm: kworker/0:64 Tainted: G        W         5.4.18-syzkaller-00113-g9204f620c2a9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events tipc_net_finalize_work
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b0/0x228 lib/dump_stack.c:118
 print_address_description+0x96/0x5d0 mm/kasan/report.c:374
 __kasan_report+0x14b/0x1c0 mm/kasan/report.c:506
 kasan_report+0x26/0x50 mm/kasan/common.c:634
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132
 tipc_named_reinit+0x1aa/0x360 net/tipc/name_distr.c:344
 tipc_net_finalize+0xcb/0x130 net/tipc/net.c:138
 tipc_net_finalize_work+0x54/0x80 net/tipc/net.c:150
 process_one_work+0x9d8/0x1030 kernel/workqueue.c:2270
 worker_thread+0xbbc/0x1610 kernel/workqueue.c:2416
 kthread+0x31a/0x340 kernel/kthread.c:255
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

The buggy address belongs to the page:
page:ffffea0007392b80 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
raw: 8000000000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881ce4adf00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881ce4adf80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881ce4ae000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff8881ce4ae080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881ce4ae100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 28952 Comm: kworker/0:64 Tainted: G    B   W         5.4.18-syzkaller-00113-g9204f620c2a9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events tipc_net_finalize_work
RIP: 0010:__rht_bucket_nested lib/rhashtable.c:1178 [inline]
RIP: 0010:rht_bucket_nested lib/rhashtable.c:1203 [inline]
RIP: 0010:rht_bucket include/linux/rhashtable.h:290 [inline]
RIP: 0010:__rhashtable_walk_find_next+0x4b5/0x9b0 lib/rhashtable.c:794
Code: 00 74 0e 89 cb e8 ab a1 78 ff 89 d9 48 8b 7c 24 78 49 c1 e7 03 4c 03 3f 48 8b 44 24 58 d3 e8 89 44 24 2c 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 7c a1 78 ff 4d 8b 3f 31 ff 4c 89
RSP: 0018:ffff8881d05879e0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00000000ffff8881 RCX: 00000000ffff8881
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881a3618040
RBP: ffff8881d0587b40 R08: ffffffff81f837cd R09: 0000000000000003
R10: ffffed103a0b0f49 R11: 0000000000000004 R12: ffff8881ce4ae010
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004fdc4c CR3: 0000000193bc8005 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rhashtable_walk_next+0x23b/0x2e0 lib/rhashtable.c:878
 tipc_sk_reinit+0x119/0x4a0 net/tipc/socket.c:2790
 tipc_net_finalize+0xd3/0x130 net/tipc/net.c:139
 tipc_net_finalize_work+0x54/0x80 net/tipc/net.c:150
 process_one_work+0x9d8/0x1030 kernel/workqueue.c:2270
 worker_thread+0xbbc/0x1610 kernel/workqueue.c:2416
 kthread+0x31a/0x340 kernel/kthread.c:255
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace 520652dba3eac9e9 ]---
RIP: 0010:__rht_bucket_nested lib/rhashtable.c:1178 [inline]
RIP: 0010:rht_bucket_nested lib/rhashtable.c:1203 [inline]
RIP: 0010:rht_bucket include/linux/rhashtable.h:290 [inline]
RIP: 0010:__rhashtable_walk_find_next+0x4b5/0x9b0 lib/rhashtable.c:794
Code: 00 74 0e 89 cb e8 ab a1 78 ff 89 d9 48 8b 7c 24 78 49 c1 e7 03 4c 03 3f 48 8b 44 24 58 d3 e8 89 44 24 2c 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 7c a1 78 ff 4d 8b 3f 31 ff 4c 89
RSP: 0018:ffff8881d05879e0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00000000ffff8881 RCX: 00000000ffff8881
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881a3618040
RBP: ffff8881d0587b40 R08: ffffffff81f837cd R09: 0000000000000003
R10: ffffed103a0b0f49 R11: 0000000000000004 R12: ffff8881ce4ae010
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001707978 CR3: 00000001c72a6005 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400