[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 61.351699][ T27] audit: type=1800 audit(1558397050.240:25): pid=8714 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 61.395058][ T27] audit: type=1800 audit(1558397050.250:26): pid=8714 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 61.455099][ T27] audit: type=1800 audit(1558397050.250:27): pid=8714 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.192' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 70.299310][ T8868] ------------[ cut here ]------------ [ 70.304791][ T8868] DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS) [ 70.304858][ T8868] WARNING: CPU: 0 PID: 8868 at kernel/locking/lockdep.c:3764 __lock_acquire+0x17b5/0x5490 [ 70.321271][ T8868] Kernel panic - not syncing: panic_on_warn set ... [ 70.327838][ T8868] CPU: 0 PID: 8868 Comm: syz-executor703 Not tainted 5.2.0-rc1+ #1 [ 70.335702][ T8868] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.345733][ T8868] Call Trace: [ 70.349004][ T8868] dump_stack+0x172/0x1f0 [ 70.353310][ T8868] ? __lock_acquire+0x16d0/0x5490 [ 70.358311][ T8868] panic+0x2cb/0x744 [ 70.362199][ T8868] ? __warn_printk+0xf3/0xf3 [ 70.366771][ T8868] ? __lock_acquire+0x17b5/0x5490 [ 70.371773][ T8868] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.377995][ T8868] ? __warn.cold+0x5/0x4d [ 70.382301][ T8868] ? __warn+0xe8/0x1d0 [ 70.386349][ T8868] ? __lock_acquire+0x17b5/0x5490 [ 70.391348][ T8868] __warn.cold+0x20/0x4d [ 70.395571][ T8868] ? vprintk_emit+0x1ea/0x700 [ 70.400221][ T8868] ? __lock_acquire+0x17b5/0x5490 [ 70.405222][ T8868] report_bug+0x263/0x2b0 [ 70.409529][ T8868] do_error_trap+0x11b/0x200 [ 70.414110][ T8868] do_invalid_op+0x37/0x50 [ 70.418507][ T8868] ? __lock_acquire+0x17b5/0x5490 [ 70.423515][ T8868] invalid_op+0x14/0x20 [ 70.427659][ T8868] RIP: 0010:__lock_acquire+0x17b5/0x5490 [ 70.433268][ T8868] Code: d2 0f 85 c7 2c 00 00 44 8b 3d a7 a0 29 08 45 85 ff 0f 85 57 f3 ff ff 48 c7 c6 20 c1 6b 87 48 c7 c7 00 98 6b 87 e8 09 d5 eb ff <0f> 0b e9 40 f3 ff ff 0f 0b e9 83 f1 ff ff 8b 0d 47 88 0e 09 85 c9 [ 70.452853][ T8868] RSP: 0018:ffff88808c2473d0 EFLAGS: 00010082 [ 70.458911][ T8868] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 70.466860][ T8868] RDX: 0000000000000000 RSI: ffffffff815ac7e6 RDI: ffffed1011848e6c [ 70.474808][ T8868] RBP: ffff88808c247578 R08: ffff8880a4bda640 R09: fffffbfff11730e9 [ 70.482858][ T8868] R10: fffffbfff11730e8 R11: ffffffff88b98743 R12: 00000000a2e77e02 [ 70.490821][ T8868] R13: 0000000000000000 R14: 0000000000041e02 R15: 0000000000000000 [ 70.498784][ T8868] ? vprintk_func+0x86/0x189 [ 70.503353][ T8868] ? sock_diag_rcv+0x2b/0x40 [ 70.507924][ T8868] ? netlink_unicast+0x531/0x710 [ 70.512835][ T8868] ? netlink_sendmsg+0x8ae/0xd70 [ 70.517747][ T8868] ? sock_sendmsg+0xd7/0x130 [ 70.522308][ T8868] ? ___sys_sendmsg+0x803/0x920 [ 70.527152][ T8868] ? __sys_sendmsg+0x105/0x1d0 [ 70.531908][ T8868] ? __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 70.537522][ T8868] ? do_fast_syscall_32+0x27b/0xd7d [ 70.542697][ T8868] ? entry_SYSENTER_compat+0x70/0x7f [ 70.547980][ T8868] ? mark_held_locks+0xf0/0xf0 [ 70.552723][ T8868] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 70.558331][ T8868] ? find_held_lock+0x35/0x130 [ 70.563084][ T8868] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 70.568714][ T8868] lock_acquire+0x16f/0x3f0 [ 70.573223][ T8868] ? rhashtable_walk_enter+0xf9/0x390 [ 70.578572][ T8868] _raw_spin_lock+0x2f/0x40 [ 70.583056][ T8868] ? rhashtable_walk_enter+0xf9/0x390 [ 70.588409][ T8868] rhashtable_walk_enter+0xf9/0x390 [ 70.593581][ T8868] __tipc_dump_start+0x1fa/0x3c0 [ 70.598494][ T8868] tipc_dump_start+0x70/0x90 [ 70.603060][ T8868] __netlink_dump_start+0x4f8/0x7d0 [ 70.608236][ T8868] ? __tipc_dump_start+0x3c0/0x3c0 [ 70.613326][ T8868] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 70.619111][ T8868] ? __tipc_diag_gen_cookie+0x90/0x90 [ 70.624458][ T8868] ? sock_diag_rcv+0x1c/0x40 [ 70.629044][ T8868] ? __tipc_dump_start+0x3c0/0x3c0 [ 70.634146][ T8868] ? tipc_unregister_sysctl+0x20/0x20 [ 70.639511][ T8868] ? tipc_ioctl+0x2e0/0x2e0 [ 70.643992][ T8868] sock_diag_rcv_msg+0x319/0x410 [ 70.648908][ T8868] netlink_rcv_skb+0x177/0x450 [ 70.653647][ T8868] ? sock_diag_bind+0x80/0x80 [ 70.658340][ T8868] ? netlink_ack+0xb50/0xb50 [ 70.662915][ T8868] ? kasan_check_read+0x11/0x20 [ 70.667742][ T8868] ? netlink_deliver_tap+0x254/0xbf0 [ 70.673003][ T8868] sock_diag_rcv+0x2b/0x40 [ 70.677398][ T8868] netlink_unicast+0x531/0x710 [ 70.682140][ T8868] ? netlink_attachskb+0x770/0x770 [ 70.687265][ T8868] ? _copy_from_iter_full+0x25d/0x8c0 [ 70.692616][ T8868] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 70.698313][ T8868] ? __check_object_size+0x3d/0x42f [ 70.703486][ T8868] netlink_sendmsg+0x8ae/0xd70 [ 70.708243][ T8868] ? netlink_unicast+0x710/0x710 [ 70.713155][ T8868] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 70.718705][ T8868] ? apparmor_socket_sendmsg+0x2a/0x30 [ 70.724144][ T8868] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.730381][ T8868] ? security_socket_sendmsg+0x8d/0xc0 [ 70.735822][ T8868] ? netlink_unicast+0x710/0x710 [ 70.740768][ T8868] sock_sendmsg+0xd7/0x130 [ 70.745165][ T8868] ___sys_sendmsg+0x803/0x920 [ 70.749829][ T8868] ? copy_msghdr_from_user+0x430/0x430 [ 70.755266][ T8868] ? trace_hardirqs_on+0x67/0x220 [ 70.760266][ T8868] ? do_huge_pmd_anonymous_page+0x420/0x1660 [ 70.766230][ T8868] ? prep_transhuge_page+0xa0/0xa0 [ 70.771322][ T8868] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.777540][ T8868] ? __handle_mm_fault+0x7cb/0x3eb0 [ 70.782774][ T8868] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.788995][ T8868] ? __fget_light+0x1a9/0x230 [ 70.793645][ T8868] ? __fdget+0x1b/0x20 [ 70.797710][ T8868] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 70.803930][ T8868] __sys_sendmsg+0x105/0x1d0 [ 70.808502][ T8868] ? __ia32_sys_shutdown+0x80/0x80 [ 70.813591][ T8868] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 70.819034][ T8868] ? do_fast_syscall_32+0xd1/0xd7d [ 70.824123][ T8868] ? entry_SYSENTER_compat+0x70/0x7f [ 70.829387][ T8868] ? do_fast_syscall_32+0xd1/0xd7d [ 70.834478][ T8868] __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 70.839938][ T8868] do_fast_syscall_32+0x27b/0xd7d [ 70.844944][ T8868] entry_SYSENTER_compat+0x70/0x7f [ 70.850053][ T8868] RIP: 0023:0xf7f33849 [ 70.854099][ T8868] Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 70.873698][ T8868] RSP: 002b:00000000ffdb325c EFLAGS: 00000246 ORIG_RAX: 0000000000000172 [ 70.882103][ T8868] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000040 [ 70.890085][ T8868] RDX: 0000000000000000 RSI: 00000000080ea078 RDI: 00000000ffdb32b0 [ 70.898031][ T8868] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 70.905980][ T8868] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 70.917811][ T8868] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 70.926780][ T8868] Kernel Offset: disabled [ 70.931103][ T8868] Rebooting in 86400 seconds..