Oops: general protection fault, probably for non-canonical address 0xdffffc001fffe000: 0000 [#1] SMP KASAN NOPTI
KASAN: probably user-memory-access in range [0x00000000ffff0000-0x00000000ffff0007]
CPU: 1 UID: 0 PID: 6095 Comm: kworker/u8:10 Not tainted 6.15.0-rc4-syzkaller-00291-g2a239ffbebb5 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Workqueue: netns cleanup_net
RIP: 0010:mld_clear_delrec+0x34a/0x5d0 net/ipv6/mcast.c:838
Code: ff ff ff e8 08 f4 3f 01 89 c5 31 ff 89 c6 e8 2d 9e a9 f7 85 ed 74 40 e8 e4 99 a9 f7 eb 05 e8 dd 99 a9 f7 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 97 8e 0b f8 4d 8b 27 49 8d 7f 30
RSP: 0018:ffffc900053f75b0 EFLAGS: 00010216
RAX: 000000001fffe000 RBX: ffff888028803538 RCX: ffff888029c33c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff8f7ed977 R09: 1ffffffff1efdb2e
R10: dffffc0000000000 R11: fffffbfff1efdb2f R12: ffff8880320b5028
R13: dffffc0000000000 R14: ffff8880320b5000 R15: 00000000ffff0000
FS:  0000000000000000(0000) GS:ffff8881261cb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe6bbbf2f98 CR3: 000000005e3ee000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 ipv6_mc_destroy_dev+0x45/0x5a0 net/ipv6/mcast.c:2842
 addrconf_ifdown+0x139e/0x1880 net/ipv6/addrconf.c:3997
 addrconf_notify+0x1bc/0x1010 net/ipv6/addrconf.c:-1
 notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2214 [inline]
 call_netdevice_notifiers net/core/dev.c:2228 [inline]
 unregister_netdevice_many_notify+0x15d4/0x2330 net/core/dev.c:11982
 cleanup_net+0x6a3/0xbd0 net/core/net_namespace.c:649
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xade/0x17a0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4e/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:mld_clear_delrec+0x34a/0x5d0 net/ipv6/mcast.c:838
Code: ff ff ff e8 08 f4 3f 01 89 c5 31 ff 89 c6 e8 2d 9e a9 f7 85 ed 74 40 e8 e4 99 a9 f7 eb 05 e8 dd 99 a9 f7 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 97 8e 0b f8 4d 8b 27 49 8d 7f 30
RSP: 0018:ffffc900053f75b0 EFLAGS: 00010216
RAX: 000000001fffe000 RBX: ffff888028803538 RCX: ffff888029c33c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff8f7ed977 R09: 1ffffffff1efdb2e
R10: dffffc0000000000 R11: fffffbfff1efdb2f R12: ffff8880320b5028
R13: dffffc0000000000 R14: ffff8880320b5000 R15: 00000000ffff0000
FS:  0000000000000000(0000) GS:ffff8881261cb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd7080cc98 CR3: 000000002855b000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	e8 08 f4 3f 01       	call   0x13ff40d
   5:	89 c5                	mov    %eax,%ebp
   7:	31 ff                	xor    %edi,%edi
   9:	89 c6                	mov    %eax,%esi
   b:	e8 2d 9e a9 f7       	call   0xf7a99e3d
  10:	85 ed                	test   %ebp,%ebp
  12:	74 40                	je     0x54
  14:	e8 e4 99 a9 f7       	call   0xf7a999fd
  19:	eb 05                	jmp    0x20
  1b:	e8 dd 99 a9 f7       	call   0xf7a999fd
  20:	4c 89 f8             	mov    %r15,%rax
  23:	48 c1 e8 03          	shr    $0x3,%rax
* 27:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2c:	74 08                	je     0x36
  2e:	4c 89 ff             	mov    %r15,%rdi
  31:	e8 97 8e 0b f8       	call   0xf80b8ecd
  36:	4d 8b 27             	mov    (%r15),%r12
  39:	49 8d 7f 30          	lea    0x30(%r15),%rdi