Oops: general protection fault, probably for non-canonical address 0xdffffc0000000012: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097]
CPU: 0 UID: 0 PID: 7285 Comm: kworker/u8:11 Not tainted 6.13.0-rc3-syzkaller-00301-gbcde95ce32b6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: netns cleanup_net
RIP: 0010:__fib6_drop_pcpu_from.part.0+0x199/0x510 net/ipv6/ip6_fib.c:980
Code: 48 c1 ea 03 42 80 3c 32 00 0f 85 5e 03 00 00 4c 8b 28 4d 85 ed 74 2e e8 85 9f be f7 49 8d bd 90 00 00 00 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 24 03 00 00 49 8b 85 90 00 00 00 4c 39 e0 0f
RSP: 0018:ffffc90004eb7040 EFLAGS: 00010216
RAX: 0000000000000012 RBX: 0000000000000000 RCX: 1ffffffff1b4e59c
RDX: ffff8880276c5a00 RSI: ffffffff89db759b RDI: 0000000000000091
RBP: ffff8880237ba4b8 R08: 0000000000000005 R09: 0000000000000007
R10: 0000000000000000 R11: 0000000000000006 R12: ffff8880237ba400
R13: 0000000000000001 R14: dffffc0000000000 R15: ffffed10046f74a2
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff5ab577bac CR3: 0000000027c20000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __fib6_drop_pcpu_from net/ipv6/ip6_fib.c:1023 [inline]
 fib6_drop_pcpu_from net/ipv6/ip6_fib.c:1024 [inline]
 fib6_purge_rt+0x80c/0x9e0 net/ipv6/ip6_fib.c:1035
 fib6_del_route net/ipv6/ip6_fib.c:1995 [inline]
 fib6_del+0xa5a/0x1760 net/ipv6/ip6_fib.c:2040
 fib6_clean_node+0x426/0x5b0 net/ipv6/ip6_fib.c:2202
 fib6_walk_continue+0x452/0x8d0 net/ipv6/ip6_fib.c:2124
 fib6_walk+0x182/0x370 net/ipv6/ip6_fib.c:2172
 fib6_clean_tree+0xd7/0x120 net/ipv6/ip6_fib.c:2252
 __fib6_clean_all+0x100/0x2d0 net/ipv6/ip6_fib.c:2268
 rt6_sync_down_dev net/ipv6/route.c:4908 [inline]
 rt6_disable_ip+0x2ef/0x940 net/ipv6/route.c:4913
 addrconf_ifdown.isra.0+0x126/0x1af0 net/ipv6/addrconf.c:3877
 addrconf_notify+0x220/0x19c0 net/ipv6/addrconf.c:3800
 notifier_call_chain+0xba/0x410 kernel/notifier.c:85
 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996
 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
 call_netdevice_notifiers net/core/dev.c:2048 [inline]
 dev_close_many+0x333/0x6a0 net/core/dev.c:1589
 dev_close net/core/dev.c:1611 [inline]
 dev_close+0x181/0x230 net/core/dev.c:1605
 cfg80211_shutdown_all_interfaces+0x9a/0x200 net/wireless/core.c:280
 ieee80211_remove_interfaces+0xd2/0x760 net/mac80211/iface.c:2280
 ieee80211_unregister_hw+0x55/0x3a0 net/mac80211/main.c:1671
 mac80211_hwsim_del_radio drivers/net/wireless/virtual/mac80211_hwsim.c:5625 [inline]
 hwsim_exit_net+0x3ad/0x7d0 drivers/net/wireless/virtual/mac80211_hwsim.c:6505
 ops_exit_list+0xb3/0x180 net/core/net_namespace.c:172
 cleanup_net+0x5b7/0xbd0 net/core/net_namespace.c:648
 process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c4/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x48/0x80 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:__fib6_drop_pcpu_from.part.0+0x199/0x510 net/ipv6/ip6_fib.c:980
Code: 48 c1 ea 03 42 80 3c 32 00 0f 85 5e 03 00 00 4c 8b 28 4d 85 ed 74 2e e8 85 9f be f7 49 8d bd 90 00 00 00 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 0f 85 24 03 00 00 49 8b 85 90 00 00 00 4c 39 e0 0f
RSP: 0018:ffffc90004eb7040 EFLAGS: 00010216
RAX: 0000000000000012 RBX: 0000000000000000 RCX: 1ffffffff1b4e59c
RDX: ffff8880276c5a00 RSI: ffffffff89db759b RDI: 0000000000000091
RBP: ffff8880237ba4b8 R08: 0000000000000005 R09: 0000000000000007
R10: 0000000000000000 R11: 0000000000000006 R12: ffff8880237ba400
R13: 0000000000000001 R14: dffffc0000000000 R15: ffffed10046f74a2
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff5ab577bac CR3: 0000000027c20000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	42 80 3c 32 00       	cmpb   $0x0,(%rdx,%r14,1)
   9:	0f 85 5e 03 00 00    	jne    0x36d
   f:	4c 8b 28             	mov    (%rax),%r13
  12:	4d 85 ed             	test   %r13,%r13
  15:	74 2e                	je     0x45
  17:	e8 85 9f be f7       	call   0xf7be9fa1
  1c:	49 8d bd 90 00 00 00 	lea    0x90(%r13),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1) <-- trapping instruction
  2f:	0f 85 24 03 00 00    	jne    0x359
  35:	49 8b 85 90 00 00 00 	mov    0x90(%r13),%rax
  3c:	4c 39 e0             	cmp    %r12,%rax
  3f:	0f                   	.byte 0xf