[ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.49' (ECDSA) to the list of known hosts. syzkaller login: [ 35.331514] IPVS: ftp: loaded support on port[0] = 21 executing program [ 35.503226] kasan: CONFIG_KASAN_INLINE enabled [ 35.508949] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.528789] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.536939] CPU: 1 PID: 3580 Comm: kworker/1:2 Not tainted 4.19.211-syzkaller #0 [ 35.547623] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 [ 35.558180] Workqueue: events netlink_sock_destruct_work [ 35.564197] RIP: 0010:klist_iter_exit+0x21/0x80 [ 35.569935] Code: 66 0f 1f 84 00 00 00 00 00 41 54 55 53 48 89 fb e8 34 69 74 f9 48 8d 6b 08 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 <80> 3c 02 00 75 40 4c 8b 63 08 4d 85 e4 74 2e e8 0b 69 74 f9 31 f6 [ 35.593814] RSP: 0018:ffff8880a8837c48 EFLAGS: 00010202 [ 35.599291] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 35.608005] RDX: 0000000000000001 RSI: ffffffff87ee1c3c RDI: 0000000000000000 [ 35.620980] RBP: 0000000000000008 R08: 0000000000000000 R09: fffffbfff15cf8ac [ 35.628914] R10: ffffffff8ae7c567 R11: 0000000000074071 R12: 0000000000000000 [ 35.636709] R13: ffffffff896f1440 R14: ffff8880ba12a8c0 R15: ffff8880ba12f000 [ 35.644350] FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 35.652582] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.658578] CR2: 000055fdb1982160 CR3: 00000000a1aec000 CR4: 00000000003406e0 [ 35.666194] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.674594] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.682865] Call Trace: [ 35.686348] nfc_genl_dump_ses_done+0x31/0x50 [ 35.691246] genl_lock_done+0x82/0xc0 [ 35.695502] ? genl_unlock+0x20/0x20 [ 35.699510] netlink_sock_destruct+0x96/0x280 [ 35.706400] ? __netlink_create+0x270/0x270 [ 35.711114] __sk_destruct+0x4b/0x8a0 [ 35.714941] __sk_free+0x165/0x3b0 [ 35.720206] sk_free+0x3b/0x50 [ 35.724315] process_one_work+0x864/0x1570 [ 35.730044] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 35.742011] worker_thread+0x64c/0x1130 [ 35.747944] ? __kthread_parkme+0x133/0x1e0 [ 35.752670] ? pr