Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 UID: 0 PID: 975 Comm: kworker/0:2 Not tainted 6.13.0-rc1-next-20241205-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events cleanup_bearer
RIP: 0010:read_pnet include/net/net_namespace.h:392 [inline]
RIP: 0010:sock_net include/net/sock.h:655 [inline]
RIP: 0010:cleanup_bearer+0x1f7/0x280 net/tipc/udp_media.c:820
Code: 18 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 bc a8 9a f6 48 8b 1b 48 83 c3 30 e8 40 e1 60 00 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 9a a8 9a f6 49 83 c7 e8 48 8b 1b
RSP: 0018:ffffc90003e47b70 EFLAGS: 00010206
RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff888026325a00
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffff888026338f08 R08: ffff888027603c2b R09: 1ffff11004ec0785
R10: dffffc0000000000 R11: ffffed1004ec0786 R12: ffff888030fb3a80
R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff888026338f18
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fde22bdf470 CR3: 000000001cbda000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:read_pnet include/net/net_namespace.h:392 [inline]
RIP: 0010:sock_net include/net/sock.h:655 [inline]
RIP: 0010:cleanup_bearer+0x1f7/0x280 net/tipc/udp_media.c:820
Code: 18 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 bc a8 9a f6 48 8b 1b 48 83 c3 30 e8 40 e1 60 00 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 9a a8 9a f6 49 83 c7 e8 48 8b 1b
RSP: 0018:ffffc90003e47b70 EFLAGS: 00010206
RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff888026325a00
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffff888026338f08 R08: ffff888027603c2b R09: 1ffff11004ec0785
R10: dffffc0000000000 R11: ffffed1004ec0786 R12: ffff888030fb3a80
R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff888026338f18
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f864b8c2290 CR3: 0000000065ea8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	18 48 89             	sbb    %cl,-0x77(%rax)
   3:	d8 48 c1             	fmuls  -0x3f(%rax)
   6:	e8 03 42 80 3c       	call   0x3c80420e
   b:	28 00                	sub    %al,(%rax)
   d:	74 08                	je     0x17
   f:	48 89 df             	mov    %rbx,%rdi
  12:	e8 bc a8 9a f6       	call   0xf69aa8d3
  17:	48 8b 1b             	mov    (%rbx),%rbx
  1a:	48 83 c3 30          	add    $0x30,%rbx
  1e:	e8 40 e1 60 00       	call   0x60e163
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 9a a8 9a f6       	call   0xf69aa8d3
  39:	49 83 c7 e8          	add    $0xffffffffffffffe8,%r15
  3d:	48 8b 1b             	mov    (%rbx),%rbx