[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 51.706908][ T26] audit: type=1800 audit(1558407577.429:25): pid=8223 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 51.748314][ T26] audit: type=1800 audit(1558407577.429:26): pid=8223 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 51.787782][ T26] audit: type=1800 audit(1558407577.429:27): pid=8223 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 '10.128.1.32' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 63.219014][ T8375] ------------[ cut here ]------------ [ 63.224773][ T8375] DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS) [ 63.224843][ T8375] WARNING: CPU: 0 PID: 8375 at kernel/locking/lockdep.c:3764 __lock_acquire+0x17b5/0x5490 [ 63.242182][ T8375] Kernel panic - not syncing: panic_on_warn set ... [ 63.249098][ T8375] CPU: 0 PID: 8375 Comm: syz-executor366 Not tainted 5.2.0-rc1+ #1 [ 63.256976][ T8375] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.267030][ T8375] Call Trace: [ 63.270438][ T8375] dump_stack+0x172/0x1f0 [ 63.274759][ T8375] ? __lock_acquire+0x16d0/0x5490 [ 63.279928][ T8375] panic+0x2cb/0x744 [ 63.283828][ T8375] ? __warn_printk+0xf3/0xf3 [ 63.288607][ T8375] ? __lock_acquire+0x17b5/0x5490 [ 63.293889][ T8375] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.300133][ T8375] ? __warn.cold+0x5/0x4d [ 63.304454][ T8375] ? __warn+0xe8/0x1d0 [ 63.308891][ T8375] ? __lock_acquire+0x17b5/0x5490 [ 63.314435][ T8375] __warn.cold+0x20/0x4d [ 63.318669][ T8375] ? vprintk_emit+0x1ea/0x700 [ 63.323337][ T8375] ? __lock_acquire+0x17b5/0x5490 [ 63.328504][ T8375] report_bug+0x263/0x2b0 [ 63.332839][ T8375] do_error_trap+0x11b/0x200 [ 63.337629][ T8375] do_invalid_op+0x37/0x50 [ 63.342407][ T8375] ? __lock_acquire+0x17b5/0x5490 [ 63.347425][ T8375] invalid_op+0x14/0x20 [ 63.351665][ T8375] RIP: 0010:__lock_acquire+0x17b5/0x5490 [ 63.357375][ T8375] 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 [ 63.378714][ T8375] RSP: 0018:ffff8880955873d0 EFLAGS: 00010082 [ 63.384907][ T8375] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 63.393256][ T8375] RDX: 0000000000000000 RSI: ffffffff815ac7e6 RDI: ffffed1012ab0e6c [ 63.401488][ T8375] RBP: ffff888095587578 R08: ffff888097aea5c0 R09: fffffbfff11730e9 [ 63.409540][ T8375] R10: fffffbfff11730e8 R11: ffffffff88b98743 R12: 000000008dc2a584 [ 63.418034][ T8375] R13: 0000000000000000 R14: 0000000000040584 R15: 0000000000000000 [ 63.426395][ T8375] ? vprintk_func+0x86/0x189 [ 63.430985][ T8375] ? sock_diag_rcv+0x2b/0x40 [ 63.435731][ T8375] ? netlink_unicast+0x531/0x710 [ 63.440662][ T8375] ? netlink_sendmsg+0x8ae/0xd70 [ 63.445677][ T8375] ? sock_sendmsg+0xd7/0x130 [ 63.450409][ T8375] ? ___sys_sendmsg+0x803/0x920 [ 63.455257][ T8375] ? __sys_sendmsg+0x105/0x1d0 [ 63.460019][ T8375] ? __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 63.465651][ T8375] ? do_fast_syscall_32+0x27b/0xd7d [ 63.470879][ T8375] ? entry_SYSENTER_compat+0x70/0x7f [ 63.476351][ T8375] ? mark_held_locks+0xf0/0xf0 [ 63.481488][ T8375] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 63.487369][ T8375] ? find_held_lock+0x35/0x130 [ 63.492579][ T8375] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 63.498360][ T8375] lock_acquire+0x16f/0x3f0 [ 63.503137][ T8375] ? rhashtable_walk_enter+0xf9/0x390 [ 63.508593][ T8375] _raw_spin_lock+0x2f/0x40 [ 63.513100][ T8375] ? rhashtable_walk_enter+0xf9/0x390 [ 63.518638][ T8375] rhashtable_walk_enter+0xf9/0x390 [ 63.523855][ T8375] __tipc_dump_start+0x1fa/0x3c0 [ 63.528968][ T8375] tipc_dump_start+0x70/0x90 [ 63.533751][ T8375] __netlink_dump_start+0x4f8/0x7d0 [ 63.539110][ T8375] ? __tipc_dump_start+0x3c0/0x3c0 [ 63.544213][ T8375] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 63.550365][ T8375] ? __tipc_diag_gen_cookie+0x90/0x90 [ 63.555973][ T8375] ? sock_diag_rcv+0x1c/0x40 [ 63.560709][ T8375] ? __tipc_dump_start+0x3c0/0x3c0 [ 63.565811][ T8375] ? tipc_unregister_sysctl+0x20/0x20 [ 63.571354][ T8375] ? tipc_ioctl+0x2e0/0x2e0 [ 63.576117][ T8375] sock_diag_rcv_msg+0x319/0x410 [ 63.581346][ T8375] netlink_rcv_skb+0x177/0x450 [ 63.586101][ T8375] ? sock_diag_bind+0x80/0x80 [ 63.590944][ T8375] ? netlink_ack+0xb50/0xb50 [ 63.595687][ T8375] ? kasan_check_read+0x11/0x20 [ 63.600598][ T8375] ? netlink_deliver_tap+0x254/0xbf0 [ 63.606213][ T8375] sock_diag_rcv+0x2b/0x40 [ 63.610627][ T8375] netlink_unicast+0x531/0x710 [ 63.615756][ T8375] ? netlink_attachskb+0x770/0x770 [ 63.620879][ T8375] ? _copy_from_iter_full+0x25d/0x8c0 [ 63.626240][ T8375] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 63.631952][ T8375] ? __check_object_size+0x3d/0x42f [ 63.637139][ T8375] netlink_sendmsg+0x8ae/0xd70 [ 63.641947][ T8375] ? netlink_unicast+0x710/0x710 [ 63.647200][ T8375] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 63.652746][ T8375] ? apparmor_socket_sendmsg+0x2a/0x30 [ 63.658200][ T8375] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.664608][ T8375] ? security_socket_sendmsg+0x8d/0xc0 [ 63.670067][ T8375] ? netlink_unicast+0x710/0x710 [ 63.675034][ T8375] sock_sendmsg+0xd7/0x130 [ 63.680142][ T8375] ___sys_sendmsg+0x803/0x920 [ 63.684808][ T8375] ? copy_msghdr_from_user+0x430/0x430 [ 63.690284][ T8375] ? trace_hardirqs_on+0x67/0x220 [ 63.695605][ T8375] ? do_huge_pmd_anonymous_page+0x420/0x1660 [ 63.701681][ T8375] ? prep_transhuge_page+0xa0/0xa0 [ 63.706882][ T8375] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.713133][ T8375] ? __handle_mm_fault+0x7cb/0x3eb0 [ 63.718569][ T8375] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 63.724990][ T8375] ? __fget_light+0x1a9/0x230 [ 63.729662][ T8375] ? __fdget+0x1b/0x20 [ 63.733722][ T8375] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 63.740062][ T8375] __sys_sendmsg+0x105/0x1d0 [ 63.744644][ T8375] ? __ia32_sys_shutdown+0x80/0x80 [ 63.749957][ T8375] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 63.755607][ T8375] ? do_fast_syscall_32+0xd1/0xd7d [ 63.760877][ T8375] ? entry_SYSENTER_compat+0x70/0x7f [ 63.766623][ T8375] ? do_fast_syscall_32+0xd1/0xd7d [ 63.771739][ T8375] __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 63.777439][ T8375] do_fast_syscall_32+0x27b/0xd7d [ 63.782616][ T8375] entry_SYSENTER_compat+0x70/0x7f [ 63.787721][ T8375] RIP: 0023:0xf7f9d849 [ 63.791780][ T8375] 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 [ 63.811557][ T8375] RSP: 002b:00000000ffba3fbc EFLAGS: 00000246 ORIG_RAX: 0000000000000172 [ 63.820444][ T8375] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000080 [ 63.828598][ T8375] RDX: 0000000000000000 RSI: 00000000080ea078 RDI: 00000000ffba4010 [ 63.836562][ T8375] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 63.844721][ T8375] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 63.852992][ T8375] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 63.862677][ T8375] Kernel Offset: disabled [ 63.867014][ T8375] Rebooting in 86400 seconds..