Oops: general protection fault, probably for non-canonical address 0xdffffc001fffe003: 0000 [#1] SMP KASAN PTI
KASAN: probably user-memory-access in range [0x00000000ffff0018-0x00000000ffff001f]
CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: netns cleanup_net
RIP: 0010:sit_exit_rtnl_net+0x20f/0x380
Code: 4c 89 ff e8 23 44 db f7 4d 8b 3f 4d 85 ff 75 0f e8 c6 da 77 f7 e9 16 01 00 00 e8 bc da 77 f7 49 8d 5f 18 49 89 dc 49 c1 ec 03 <41> 80 3c 2c 00 74 08 48 89 df e8 f2 43 db f7 4c 8b 2b b8 08 01 00
RSP: 0018:ffffc900000f7878 EFLAGS: 00010206
RAX: 1ffff1100617c585 RBX: 00000000ffff0018 RCX: ffff88801c2e5640
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff8f5381e7 R09: 1ffffffff1ea703c
R10: dffffc0000000000 R11: fffffbfff1ea703d R12: 000000001fffe003
R13: ffff888033bce108 R14: ffff888107420000 R15: 00000000ffff0000
FS:  0000000000000000(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5636b76d58 CR3: 00000001065a4000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 ops_undo_list+0x350/0x990
 cleanup_net+0x4c5/0x800
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:sit_exit_rtnl_net+0x20f/0x380
Code: 4c 89 ff e8 23 44 db f7 4d 8b 3f 4d 85 ff 75 0f e8 c6 da 77 f7 e9 16 01 00 00 e8 bc da 77 f7 49 8d 5f 18 49 89 dc 49 c1 ec 03 <41> 80 3c 2c 00 74 08 48 89 df e8 f2 43 db f7 4c 8b 2b b8 08 01 00
RSP: 0018:ffffc900000f7878 EFLAGS: 00010206
RAX: 1ffff1100617c585 RBX: 00000000ffff0018 RCX: ffff88801c2e5640
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff8f5381e7 R09: 1ffffffff1ea703c
R10: dffffc0000000000 R11: fffffbfff1ea703d R12: 000000001fffe003
R13: ffff888033bce108 R14: ffff888107420000 R15: 00000000ffff0000
FS:  0000000000000000(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556c2e25c8 CR3: 0000000020ae2000 CR4: 00000000000006f0
