tipc: 32-bit node address hash set to fdff1eac
==================================================================
BUG: KASAN: use-after-free in tipc_named_reinit+0x194/0x340 net/tipc/name_distr.c:344
Read of size 8 at addr ffff8881c6b12000 by task kworker/1:7/8428

CPU: 1 PID: 8428 Comm: kworker/1:7 Not tainted 5.4.54-syzkaller-00671-gd75ddc924b99 #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+0x14a/0x1ce lib/dump_stack.c:118
 print_address_description+0x93/0x620 mm/kasan/report.c:374
 __kasan_report+0x16d/0x1e0 mm/kasan/report.c:506
 kasan_report+0x36/0x60 mm/kasan/common.c:634
 tipc_named_reinit+0x194/0x340 net/tipc/name_distr.c:344
 tipc_net_finalize+0xc7/0x130 net/tipc/net.c:138
 tipc_net_finalize_work+0x50/0x70 net/tipc/net.c:150
 process_one_work+0x777/0xf90 kernel/workqueue.c:2274
 worker_thread+0xa8f/0x1430 kernel/workqueue.c:2420
 kthread+0x2df/0x300 kernel/kthread.c:255
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

The buggy address belongs to the page:
page:ffffea00071ac480 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881c6b11f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881c6b11f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881c6b12000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff8881c6b12080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881c6b12100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
BUG: unable to handle page fault for address: fffffffffffffff0
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 4c0f067 P4D 4c0f067 PUD 4c11067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 8428 Comm: kworker/1:7 Tainted: G    B             5.4.54-syzkaller-00671-gd75ddc924b99 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events tipc_net_finalize_work
RIP: 0010:tipc_named_reinit+0x1c4/0x340 net/tipc/name_distr.c:345
Code: 74 6a e8 ff c1 79 fd 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 8d 7b f0 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 75 28 <89> 6b f0 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 43
RSP: 0018:ffff8881d21afcb0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881ce8c8f80
RDX: 0000000000000000 RSI: 0000000000000246 RDI: fffffffffffffff0
RBP: 00000000fdff1eac R08: dffffc0000000000 R09: fffffbfff0ac35e9
R10: fffffbfff0ac35e9 R11: 0000000000000000 R12: ffff8881c6b10000
R13: dffffc0000000000 R14: ffff888171355160 R15: ffff8881c6b12000
FS:  0000000000000000(0000) GS:ffff8881db900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff0 CR3: 00000001d2a4d001 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 tipc_net_finalize+0xc7/0x130 net/tipc/net.c:138
 tipc_net_finalize_work+0x50/0x70 net/tipc/net.c:150
 process_one_work+0x777/0xf90 kernel/workqueue.c:2274
 worker_thread+0xa8f/0x1430 kernel/workqueue.c:2420
 kthread+0x2df/0x300 kernel/kthread.c:255
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352
Modules linked in:
CR2: fffffffffffffff0
---[ end trace 3354eb97d284e79b ]---
RIP: 0010:tipc_named_reinit+0x1c4/0x340 net/tipc/name_distr.c:345
Code: 74 6a e8 ff c1 79 fd 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 8d 7b f0 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 75 28 <89> 6b f0 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 43
RSP: 0018:ffff8881d21afcb0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881ce8c8f80
RDX: 0000000000000000 RSI: 0000000000000246 RDI: fffffffffffffff0
RBP: 00000000fdff1eac R08: dffffc0000000000 R09: fffffbfff0ac35e9
R10: fffffbfff0ac35e9 R11: 0000000000000000 R12: ffff8881c6b10000
R13: dffffc0000000000 R14: ffff888171355160 R15: ffff8881c6b12000
FS:  0000000000000000(0000) GS:ffff8881db900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff0 CR3: 00000001d2a4d001 CR4: 00000000001606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600