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: 0 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: ipv6_addrconf addrconf_dad_work
RIP: 0010:ip6_mc_clear_src+0x18f/0x580
Code: ff ff ff e8 f3 f0 41 01 89 c5 31 ff 89 c6 e8 68 a5 87 f7 85 ed 74 45 e8 1f a1 87 f7 eb 05 e8 18 a1 87 f7 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 d2 0c eb f7 49 8b 2c 24 49 8d 7c
RSP: 0018:ffffc900000f77e8 EFLAGS: 00010206
RAX: 000000001fffe000 RBX: 1ffff11008009102 RCX: ffff88801c2f5640
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88811925e4fb R09: 1ffff1102324bc9f
R10: dffffc0000000000 R11: ffffed102324bca0 R12: 00000000ffff0000
R13: dffffc0000000000 R14: 0000000000000538 R15: ffff888040048810
FS:  0000000000000000(0000) GS:ffff8880b861a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdd8d400fc8 CR3: 000000010e59c000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 mld_del_delrec+0x985/0xcd0
 __ipv6_dev_mc_inc+0x88f/0xa50
 addrconf_dad_work+0x3d0/0x14b0
 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:ip6_mc_clear_src+0x18f/0x580
Code: ff ff ff e8 f3 f0 41 01 89 c5 31 ff 89 c6 e8 68 a5 87 f7 85 ed 74 45 e8 1f a1 87 f7 eb 05 e8 18 a1 87 f7 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 d2 0c eb f7 49 8b 2c 24 49 8d 7c
RSP: 0018:ffffc900000f77e8 EFLAGS: 00010206
RAX: 000000001fffe000 RBX: 1ffff11008009102 RCX: ffff88801c2f5640
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88811925e4fb R09: 1ffff1102324bc9f
R10: dffffc0000000000 R11: ffffed102324bca0 R12: 00000000ffff0000
R13: dffffc0000000000 R14: 0000000000000538 R15: ffff888040048810
FS:  0000000000000000(0000) GS:ffff8880b861a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558cee17e0 CR3: 000000000df36000 CR4: 00000000000006f0
