[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.54' (ECDSA) to the list of known hosts. syzkaller login: [ 32.622829] IPVS: ftp: loaded support on port[0] = 21 executing program [ 32.701455] FAULT_INJECTION: forcing a failure. [ 32.701455] name failslab, interval 1, probability 0, space 0, times 1 [ 32.712968] CPU: 1 PID: 8095 Comm: syz-executor995 Not tainted 4.19.211-syzkaller #0 [ 32.720833] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 32.730167] Call Trace: [ 32.732741] dump_stack+0x1fc/0x2ef [ 32.736357] should_fail.cold+0xa/0xf [ 32.740142] ? setup_fault_attr+0x200/0x200 [ 32.744464] ? lock_acquire+0x170/0x3c0 [ 32.748424] __should_failslab+0x115/0x180 [ 32.752646] should_failslab+0x5/0x10 [ 32.756433] kmem_cache_alloc_node+0x245/0x3b0 [ 32.761001] __alloc_skb+0x71/0x560 [ 32.764611] netlink_dump+0x55f/0xc10 [ 32.768425] __netlink_dump_start+0x4e9/0x6f0 [ 32.772923] ? genl_lock_dumpit+0x90/0x90 [ 32.777202] genl_family_rcv_msg+0xa76/0xc40 [ 32.781602] ? genl_rcv+0x40/0x40 [ 32.785189] ? genl_rcv_msg+0x12f/0x160 [ 32.789150] ? genl_lock_dumpit+0x90/0x90 [ 32.793283] ? genl_lock_done+0xc0/0xc0 [ 32.797241] ? genl_unlock+0x20/0x20 [ 32.800944] ? mark_held_locks+0xf0/0xf0 [ 32.805011] ? __radix_tree_lookup+0x216/0x370 [ 32.809604] genl_rcv_msg+0xbf/0x160 [ 32.813305] netlink_rcv_skb+0x160/0x440 [ 32.817350] ? genl_family_rcv_msg+0xc40/0xc40 [ 32.821917] ? netlink_ack+0xae0/0xae0 [ 32.825788] ? genl_rcv+0x15/0x40 [ 32.829228] genl_rcv+0x24/0x40 [ 32.832494] netlink_unicast+0x4d5/0x690 [ 32.836543] ? netlink_sendskb+0x110/0x110 [ 32.840765] ? _copy_from_iter_full+0x229/0x7c0 [ 32.845419] ? __phys_addr_symbol+0x2c/0x70 [ 32.849743] ? __check_object_size+0x17b/0x3e0 [ 32.854317] netlink_sendmsg+0x6c3/0xc50 [ 32.858363] ? aa_af_perm+0x230/0x230 [ 32.862146] ? nlmsg_notify+0x1f0/0x1f0 [ 32.866101] ? kernel_recvmsg+0x220/0x220 [ 32.870251] ? nlmsg_notify+0x1f0/0x1f0 [ 32.874318] sock_sendmsg+0xc3/0x120 [ 32.878015] ___sys_sendmsg+0x7bb/0x8e0 [ 32.881976] ? check_preemption_disabled+0x41/0x280 [ 32.886972] ? copy_msghdr_from_user+0x440/0x440 [ 32.891715] ? proc_fail_nth_write+0x95/0x1d0 [ 32.896193] ? proc_tgid_io_accounting+0x7f0/0x7f0 [ 32.901125] ? debug_check_no_obj_freed+0x201/0x490 [ 32.906126] ? __vfs_write+0xff/0x770 [ 32.909927] ? proc_tgid_io_accounting+0x7f0/0x7f0 [ 32.914841] ? common_file_perm+0x4e5/0x850 [ 32.919161] ? kernel_read+0x110/0x110 [ 32.923034] ? trace_hardirqs_off+0x64/0x200 [ 32.927425] ? fsnotify+0x84e/0xe10 [ 32.931034] ? vfs_write+0x3d7/0x540 [ 32.934733] ? __fdget+0x1a0/0x230 [ 32.938258] __x64_sys_sendmsg+0x132/0x220 [ 32.942488] ? __sys_sendmsg+0x1b0/0x1b0 [ 32.946529] ? vfs_write+0x393/0x540 [ 32.950251] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 32.955598] ? trace_hardirqs_off_caller+0x6e/0x210 [ 32.960595] ? do_syscall_64+0x21/0x620 [ 32.964559] do_syscall_64+0xf9/0x620 [ 32.968352] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 32.973526] RIP: 0033:0x7f3a2db226a9 [ 32.977223] Code: 28 c3 e8 7a 15 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 32.996127] RSP: 002b:00007fff51e340f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 33.003819] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f3a2db226a9 [ 33.011091] RDX: 0000000000000000 RSI: 0000000020001ac0 RDI: 0000000000000004 [ 33.018348] RBP: 00007fff51e34110 R08: 0000000000000001 R09: bb1414ac51e34127 [ 33.025599] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 [ 33.032854] R13: 0000000000000013 R14: 00007fff51e34110 R15: 0000000000000003 [ 33.082596] kasan: CONFIG_KASAN_INLINE enabled [ 33.087253] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.096516] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 33.102762] CPU: 1 PID: 3509 Comm: kworker/1:2 Not tainted 4.19.211-syzkaller #0 [ 33.110285] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 33.119642] Workqueue: events netlink_sock_destruct_work [ 33.125097] RIP: 0010:klist_iter_exit+0x21/0x80 [ 33.129763] 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 [ 33.148653] RSP: 0018:ffff8880a9747c48 EFLAGS: 00010202 [ 33.154029] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 33.161314] RDX: 0000000000000001 RSI: ffffffff87ee1c3c RDI: 0000000000000000 [ 33.168563] RBP: 0000000000000008 R08: 0000000000000000 R09: fffffbfff15cf8ac [ 33.175813] R10: ffffffff8ae7c567 R11: 0000000000074071 R12: 0000000000000000 [ 33.183064] R13: ffffffff896f11a0 R14: ffff8880ba12a8c0 R15: ffff8880ba12f000 [ 33.190318] FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 33.198635] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.204501] CR2: 00007f83bf897000 CR3: 00000000a0ea6000 CR4: 00000000003406e0 [ 33.211756] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.219010] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.226259] Call Trace: [ 33.228835] nfc_genl_dump_devices_done+0x31/0x50 [ 33.233659] genl_lock_done+0x82/0xc0 [ 33.237441] ? genl_unlock+0x20/0x20 [ 33.241152] netlink_sock_destruct+0x96/0x280 [ 33.245626] ? __netlink_create+0x270/0x270 [ 33.249928] __sk_destruct+0x4b/0x8a0 [ 33.253711] __sk_free+0x165/0x3b0 [ 33.257281] sk_free+0x3b/0x50 [ 33.260458] process_one_work+0x864/0x1570 [ 33.264676] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 33.269326] worker_thread+0x64c/0x1130 [ 33.273283] ? __kthread_parkme+0x133/0x1e0 [ 33.277586] ? process_one_work+0x1570/0x1570 [ 33.282089] kt