[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 59.794726][ T26] audit: type=1800 audit(1558405469.544:25): pid=8542 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 59.830137][ T26] audit: type=1800 audit(1558405469.544:26): pid=8542 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 59.850894][ T26] audit: type=1800 audit(1558405469.544:27): pid=8542 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 '10.128.0.167' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 70.134514][ T8697] ------------[ cut here ]------------ [ 70.140149][ T8697] DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS) [ 70.140220][ T8697] WARNING: CPU: 1 PID: 8697 at kernel/locking/lockdep.c:3764 __lock_acquire+0x17b5/0x5490 [ 70.157149][ T8697] Kernel panic - not syncing: panic_on_warn set ... [ 70.163903][ T8697] CPU: 1 PID: 8697 Comm: syz-executor156 Not tainted 5.2.0-rc1+ #1 [ 70.172019][ T8697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.182153][ T8697] Call Trace: [ 70.185438][ T8697] dump_stack+0x172/0x1f0 [ 70.190001][ T8697] ? __lock_acquire+0x16d0/0x5490 [ 70.195017][ T8697] panic+0x2cb/0x744 [ 70.199028][ T8697] ? __warn_printk+0xf3/0xf3 [ 70.203665][ T8697] ? __lock_acquire+0x17b5/0x5490 [ 70.208749][ T8697] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.215127][ T8697] ? __warn.cold+0x5/0x4d [ 70.219467][ T8697] ? __warn+0xe8/0x1d0 [ 70.223527][ T8697] ? __lock_acquire+0x17b5/0x5490 [ 70.228821][ T8697] __warn.cold+0x20/0x4d [ 70.233135][ T8697] ? vprintk_emit+0x1ea/0x700 [ 70.237861][ T8697] ? __lock_acquire+0x17b5/0x5490 [ 70.243366][ T8697] report_bug+0x263/0x2b0 [ 70.247812][ T8697] do_error_trap+0x11b/0x200 [ 70.252454][ T8697] do_invalid_op+0x37/0x50 [ 70.256861][ T8697] ? __lock_acquire+0x17b5/0x5490 [ 70.261876][ T8697] invalid_op+0x14/0x20 [ 70.266102][ T8697] RIP: 0010:__lock_acquire+0x17b5/0x5490 [ 70.272147][ T8697] 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 [ 70.292010][ T8697] RSP: 0018:ffff8880957cf3d0 EFLAGS: 00010082 [ 70.298185][ T8697] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 70.306207][ T8697] RDX: 0000000000000000 RSI: ffffffff815ac7e6 RDI: ffffed1012af9e6c [ 70.314260][ T8697] RBP: ffff8880957cf578 R08: ffff88809a6e4380 R09: fffffbfff11730e9 [ 70.322228][ T8697] R10: fffffbfff11730e8 R11: ffffffff88b98743 R12: 00000000781190f5 [ 70.330280][ T8697] R13: 0000000000000000 R14: 00000000000410f5 R15: 0000000000000000 [ 70.338567][ T8697] ? vprintk_func+0x86/0x189 [ 70.343156][ T8697] ? sock_diag_rcv+0x2b/0x40 [ 70.347739][ T8697] ? netlink_unicast+0x531/0x710 [ 70.352816][ T8697] ? netlink_sendmsg+0x8ae/0xd70 [ 70.357747][ T8697] ? sock_sendmsg+0xd7/0x130 [ 70.362413][ T8697] ? ___sys_sendmsg+0x803/0x920 [ 70.367254][ T8697] ? __sys_sendmsg+0x105/0x1d0 [ 70.372009][ T8697] ? __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 70.377790][ T8697] ? do_fast_syscall_32+0x27b/0xd7d [ 70.382982][ T8697] ? entry_SYSENTER_compat+0x70/0x7f [ 70.388264][ T8697] ? mark_held_locks+0xf0/0xf0 [ 70.393041][ T8697] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 70.398738][ T8697] ? find_held_lock+0x35/0x130 [ 70.403795][ T8697] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 70.409455][ T8697] lock_acquire+0x16f/0x3f0 [ 70.414653][ T8697] ? rhashtable_walk_enter+0xf9/0x390 [ 70.420139][ T8697] _raw_spin_lock+0x2f/0x40 [ 70.424811][ T8697] ? rhashtable_walk_enter+0xf9/0x390 [ 70.430675][ T8697] rhashtable_walk_enter+0xf9/0x390 [ 70.435965][ T8697] __tipc_dump_start+0x1fa/0x3c0 [ 70.440895][ T8697] tipc_dump_start+0x70/0x90 [ 70.445478][ T8697] __netlink_dump_start+0x4f8/0x7d0 [ 70.450827][ T8697] ? __tipc_dump_start+0x3c0/0x3c0 [ 70.456201][ T8697] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 70.462000][ T8697] ? __tipc_diag_gen_cookie+0x90/0x90 [ 70.467361][ T8697] ? sock_diag_rcv+0x1c/0x40 [ 70.471943][ T8697] ? __tipc_dump_start+0x3c0/0x3c0 [ 70.477137][ T8697] ? tipc_unregister_sysctl+0x20/0x20 [ 70.482646][ T8697] ? tipc_ioctl+0x2e0/0x2e0 [ 70.487150][ T8697] sock_diag_rcv_msg+0x319/0x410 [ 70.492232][ T8697] netlink_rcv_skb+0x177/0x450 [ 70.496988][ T8697] ? sock_diag_bind+0x80/0x80 [ 70.501658][ T8697] ? netlink_ack+0xb50/0xb50 [ 70.506478][ T8697] ? kasan_check_read+0x11/0x20 [ 70.511322][ T8697] ? netlink_deliver_tap+0x254/0xbf0 [ 70.516599][ T8697] sock_diag_rcv+0x2b/0x40 [ 70.521062][ T8697] netlink_unicast+0x531/0x710 [ 70.525845][ T8697] ? netlink_attachskb+0x770/0x770 [ 70.530947][ T8697] ? _copy_from_iter_full+0x25d/0x8c0 [ 70.536308][ T8697] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 70.542161][ T8697] ? __check_object_size+0x3d/0x42f [ 70.547494][ T8697] netlink_sendmsg+0x8ae/0xd70 [ 70.552342][ T8697] ? netlink_unicast+0x710/0x710 [ 70.557328][ T8697] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 70.562933][ T8697] ? apparmor_socket_sendmsg+0x2a/0x30 [ 70.568526][ T8697] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.574776][ T8697] ? security_socket_sendmsg+0x8d/0xc0 [ 70.580229][ T8697] ? netlink_unicast+0x710/0x710 [ 70.585160][ T8697] sock_sendmsg+0xd7/0x130 [ 70.589565][ T8697] ___sys_sendmsg+0x803/0x920 [ 70.594236][ T8697] ? copy_msghdr_from_user+0x430/0x430 [ 70.599684][ T8697] ? trace_hardirqs_on+0x67/0x220 [ 70.604938][ T8697] ? do_huge_pmd_anonymous_page+0x420/0x1660 [ 70.610977][ T8697] ? prep_transhuge_page+0xa0/0xa0 [ 70.616348][ T8697] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.622640][ T8697] ? __handle_mm_fault+0x7cb/0x3eb0 [ 70.627832][ T8697] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.634060][ T8697] ? __fget_light+0x1a9/0x230 [ 70.638752][ T8697] ? __fdget+0x1b/0x20 [ 70.642814][ T8697] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 70.649049][ T8697] __sys_sendmsg+0x105/0x1d0 [ 70.653656][ T8697] ? __ia32_sys_shutdown+0x80/0x80 [ 70.658765][ T8697] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 70.664443][ T8697] ? do_fast_syscall_32+0xd1/0xd7d [ 70.669605][ T8697] ? entry_SYSENTER_compat+0x70/0x7f [ 70.674880][ T8697] ? do_fast_syscall_32+0xd1/0xd7d [ 70.679984][ T8697] __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 70.685435][ T8697] do_fast_syscall_32+0x27b/0xd7d [ 70.690455][ T8697] entry_SYSENTER_compat+0x70/0x7f [ 70.695555][ T8697] RIP: 0023:0xf7f2b849 [ 70.699939][ T8697] 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 [ 70.719536][ T8697] RSP: 002b:00000000ffa3ef4c EFLAGS: 00000246 ORIG_RAX: 0000000000000172 [ 70.728028][ T8697] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000040 [ 70.736211][ T8697] RDX: 0000000000000000 RSI: 00000000080ea078 RDI: 00000000ffa3efa0 [ 70.744229][ T8697] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 70.752463][ T8697] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 70.760425][ T8697] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 70.770037][ T8697] Kernel Offset: disabled [ 70.774400][ T8697] Rebooting in 86400 seconds..