Oops: general protection fault, probably for non-canonical address 0xdffffc001fffe000: 0000 [#1] SMP KASAN PTI
KASAN: probably user-memory-access in range [0x00000000ffff0000-0x00000000ffff0007]
CPU: 1 UID: 0 PID: 5879 Comm: kworker/1:4 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: mld mld_ifc_work
RIP: 0010:add_grec+0x79f/0x1740
Code: c6 e8 e5 d1 86 f7 45 85 ff 0f 84 b1 00 00 00 e8 97 cd 86 f7 eb 05 e8 90 cd 86 f7 4c 89 e0 48 c1 e8 03 48 89 84 24 a0 00 00 00 <42> 80 3c 30 00 74 08 4c 89 e7 e8 42 39 ea f7 4d 8b 3c 24 48 8b 7c
RSP: 0018:ffffc9000397f8f8 EFLAGS: 00010206
RAX: 000000001fffe000 RBX: 0000000000000000 RCX: ffff888108380000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888108380000 R09: 0000000000000002
R10: 0000000000000004 R11: 0000000000000000 R12: 00000000ffff0000
R13: 0000000000000005 R14: dffffc0000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881a3c18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8616118fc8 CR3: 000000012de14000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 mld_ifc_work+0x676/0xd60
 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:add_grec+0x79f/0x1740
Code: c6 e8 e5 d1 86 f7 45 85 ff 0f 84 b1 00 00 00 e8 97 cd 86 f7 eb 05 e8 90 cd 86 f7 4c 89 e0 48 c1 e8 03 48 89 84 24 a0 00 00 00 <42> 80 3c 30 00 74 08 4c 89 e7 e8 42 39 ea f7 4d 8b 3c 24 48 8b 7c
RSP: 0018:ffffc9000397f8f8 EFLAGS: 00010206

RAX: 000000001fffe000 RBX: 0000000000000000 RCX: ffff888108380000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888108380000 R09: 0000000000000002
R10: 0000000000000004 R11: 0000000000000000 R12: 00000000ffff0000
R13: 0000000000000005 R14: dffffc0000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881a3c18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c290045 CR3: 0000000134e86000 CR4: 00000000000006f0
