------------[ cut here ]------------
kernel BUG at arch/x86/mm/physaddr.c:28!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 23407 Comm: kworker/u4:3 Not tainted 5.9.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:__phys_addr+0xa7/0x110 arch/x86/mm/physaddr.c:28
Code: 33 23 0a 4c 89 e3 31 ff 48 d3 eb 48 89 de e8 90 69 40 00 48 85 db 75 0d e8 06 6d 40 00 4c 89 e0 5b 5d 41 5c c3 e8 f9 6c 40 00 <0f> 0b e8 f2 6c 40 00 48 c7 c0 10 50 e9 89 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc90016f3f788 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000007707700 RCX: ffffffff8135d0e8
RDX: ffff88809a46a3c0 RSI: ffffffff8135d147 RDI: 0000000000000006
RBP: 0000000087707700 R08: 0000000000000001 R09: ffffffff8d0b79ff
R10: 0000000087707700 R11: 0000000000000000 R12: 0000778007707700
R13: ffffc90016f3f7f0 R14: 0000000000000200 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004ef510 CR3: 0000000092dfc000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 virt_to_head_page include/linux/mm.h:850 [inline]
 qlink_to_cache mm/kasan/quarantine.c:128 [inline]
 qlist_free_all+0xd9/0x170 mm/kasan/quarantine.c:165
 quarantine_reduce+0x17e/0x200 mm/kasan/quarantine.c:261
 __kasan_kmalloc.constprop.0+0x9e/0xd0 mm/kasan/common.c:442
 slab_post_alloc_hook mm/slab.h:518 [inline]
 slab_alloc_node mm/slab.c:3254 [inline]
 kmem_cache_alloc_node+0x136/0x430 mm/slab.c:3574
 __alloc_skb+0x71/0x550 net/core/skbuff.c:198
 alloc_skb include/linux/skbuff.h:1094 [inline]
 nlmsg_new include/net/netlink.h:940 [inline]
 mpls_netconf_notify_devconf+0x4a/0x110 net/mpls/af_mpls.c:1187
 mpls_dev_sysctl_unregister net/mpls/af_mpls.c:1443 [inline]
 mpls_dev_notify+0x50b/0x900 net/mpls/af_mpls.c:1620
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2033
 call_netdevice_notifiers_extack net/core/dev.c:2045 [inline]
 call_netdevice_notifiers net/core/dev.c:2059 [inline]
 rollback_registered_many+0x77a/0x1250 net/core/dev.c:9284
 unregister_netdevice_many.part.0+0x1a/0x2f0 net/core/dev.c:10429
 unregister_netdevice_many+0x36/0x50 net/core/dev.c:10428
 ip6_tnl_exit_batch_net+0x477/0x6a0 net/ipv6/ip6_tunnel.c:2331
 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:189
 cleanup_net+0x4ea/0xa00 net/core/net_namespace.c:603
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Modules linked in:
---[ end trace a289152e192ea581 ]---
RIP: 0010:__phys_addr+0xa7/0x110 arch/x86/mm/physaddr.c:28
Code: 33 23 0a 4c 89 e3 31 ff 48 d3 eb 48 89 de e8 90 69 40 00 48 85 db 75 0d e8 06 6d 40 00 4c 89 e0 5b 5d 41 5c c3 e8 f9 6c 40 00 <0f> 0b e8 f2 6c 40 00 48 c7 c0 10 50 e9 89 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc90016f3f788 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000007707700 RCX: ffffffff8135d0e8
RDX: ffff88809a46a3c0 RSI: ffffffff8135d147 RDI: 0000000000000006
RBP: 0000000087707700 R08: 0000000000000001 R09: ffffffff8d0b79ff
R10: 0000000087707700 R11: 0000000000000000 R12: 0000778007707700
R13: ffffc90016f3f7f0 R14: 0000000000000200 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8bf4b81000 CR3: 000000009dd4f000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400