[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 56.085052][ T26] audit: type=1800 audit(1558398300.637:25): pid=8252 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 56.127923][ T26] audit: type=1800 audit(1558398300.647:26): pid=8252 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 56.161712][ T26] audit: type=1800 audit(1558398300.647:27): pid=8252 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 '10.128.0.246' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 66.405591][ T8406] ------------[ cut here ]------------ [ 66.411073][ T8406] DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS) [ 66.411148][ T8406] WARNING: CPU: 1 PID: 8406 at kernel/locking/lockdep.c:3764 __lock_acquire+0x17b5/0x5490 [ 66.427571][ T8406] Kernel panic - not syncing: panic_on_warn set ... [ 66.434571][ T8406] CPU: 1 PID: 8406 Comm: syz-executor940 Not tainted 5.2.0-rc1+ #1 [ 66.442517][ T8406] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.452552][ T8406] Call Trace: [ 66.455819][ T8406] dump_stack+0x172/0x1f0 [ 66.460125][ T8406] ? __lock_acquire+0x16d0/0x5490 [ 66.465121][ T8406] panic+0x2cb/0x744 [ 66.468992][ T8406] ? __warn_printk+0xf3/0xf3 [ 66.473557][ T8406] ? __lock_acquire+0x17b5/0x5490 [ 66.478641][ T8406] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.484854][ T8406] ? __warn.cold+0x5/0x4d [ 66.489171][ T8406] ? __warn+0xe8/0x1d0 [ 66.493216][ T8406] ? __lock_acquire+0x17b5/0x5490 [ 66.498224][ T8406] __warn.cold+0x20/0x4d [ 66.502442][ T8406] ? vprintk_emit+0x1ea/0x700 [ 66.507090][ T8406] ? __lock_acquire+0x17b5/0x5490 [ 66.512091][ T8406] report_bug+0x263/0x2b0 [ 66.516398][ T8406] do_error_trap+0x11b/0x200 [ 66.520964][ T8406] do_invalid_op+0x37/0x50 [ 66.525353][ T8406] ? __lock_acquire+0x17b5/0x5490 [ 66.530358][ T8406] invalid_op+0x14/0x20 [ 66.534509][ T8406] RIP: 0010:__lock_acquire+0x17b5/0x5490 [ 66.540133][ T8406] 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 [ 66.559721][ T8406] RSP: 0018:ffff88808d3773d0 EFLAGS: 00010082 [ 66.565772][ T8406] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 66.573781][ T8406] RDX: 0000000000000000 RSI: ffffffff815ac7e6 RDI: ffffed1011a6ee6c [ 66.581779][ T8406] RBP: ffff88808d377578 R08: ffff8880855de640 R09: fffffbfff11730e9 [ 66.589741][ T8406] R10: fffffbfff11730e8 R11: ffffffff88b98743 R12: 00000000e8bb8997 [ 66.597696][ T8406] R13: 0000000000000000 R14: 0000000000040997 R15: 0000000000000000 [ 66.605661][ T8406] ? vprintk_func+0x86/0x189 [ 66.610229][ T8406] ? sock_diag_rcv+0x2b/0x40 [ 66.614795][ T8406] ? netlink_unicast+0x531/0x710 [ 66.619704][ T8406] ? netlink_sendmsg+0x8ae/0xd70 [ 66.624623][ T8406] ? sock_sendmsg+0xd7/0x130 [ 66.629189][ T8406] ? ___sys_sendmsg+0x803/0x920 [ 66.634013][ T8406] ? __sys_sendmsg+0x105/0x1d0 [ 66.638756][ T8406] ? __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 66.644364][ T8406] ? do_fast_syscall_32+0x27b/0xd7d [ 66.649539][ T8406] ? entry_SYSENTER_compat+0x70/0x7f [ 66.654813][ T8406] ? mark_held_locks+0xf0/0xf0 [ 66.659557][ T8406] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 66.665163][ T8406] ? find_held_lock+0x35/0x130 [ 66.669898][ T8406] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 66.675520][ T8406] lock_acquire+0x16f/0x3f0 [ 66.679999][ T8406] ? rhashtable_walk_enter+0xf9/0x390 [ 66.685345][ T8406] _raw_spin_lock+0x2f/0x40 [ 66.689822][ T8406] ? rhashtable_walk_enter+0xf9/0x390 [ 66.695163][ T8406] rhashtable_walk_enter+0xf9/0x390 [ 66.700336][ T8406] __tipc_dump_start+0x1fa/0x3c0 [ 66.705244][ T8406] tipc_dump_start+0x70/0x90 [ 66.709819][ T8406] __netlink_dump_start+0x4f8/0x7d0 [ 66.714996][ T8406] ? __tipc_dump_start+0x3c0/0x3c0 [ 66.720087][ T8406] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 66.725876][ T8406] ? __tipc_diag_gen_cookie+0x90/0x90 [ 66.731221][ T8406] ? sock_diag_rcv+0x1c/0x40 [ 66.735784][ T8406] ? __tipc_dump_start+0x3c0/0x3c0 [ 66.740866][ T8406] ? tipc_unregister_sysctl+0x20/0x20 [ 66.746211][ T8406] ? tipc_ioctl+0x2e0/0x2e0 [ 66.750689][ T8406] sock_diag_rcv_msg+0x319/0x410 [ 66.756943][ T8406] netlink_rcv_skb+0x177/0x450 [ 66.761687][ T8406] ? sock_diag_bind+0x80/0x80 [ 66.766339][ T8406] ? netlink_ack+0xb50/0xb50 [ 66.770912][ T8406] ? kasan_check_read+0x11/0x20 [ 66.775746][ T8406] ? netlink_deliver_tap+0x254/0xbf0 [ 66.781093][ T8406] sock_diag_rcv+0x2b/0x40 [ 66.785487][ T8406] netlink_unicast+0x531/0x710 [ 66.790243][ T8406] ? netlink_attachskb+0x770/0x770 [ 66.795333][ T8406] ? _copy_from_iter_full+0x25d/0x8c0 [ 66.800678][ T8406] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 66.806367][ T8406] ? __check_object_size+0x3d/0x42f [ 66.811554][ T8406] netlink_sendmsg+0x8ae/0xd70 [ 66.816294][ T8406] ? netlink_unicast+0x710/0x710 [ 66.821205][ T8406] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 66.826738][ T8406] ? apparmor_socket_sendmsg+0x2a/0x30 [ 66.832174][ T8406] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.838390][ T8406] ? security_socket_sendmsg+0x8d/0xc0 [ 66.843836][ T8406] ? netlink_unicast+0x710/0x710 [ 66.848753][ T8406] sock_sendmsg+0xd7/0x130 [ 66.853160][ T8406] ___sys_sendmsg+0x803/0x920 [ 66.857816][ T8406] ? copy_msghdr_from_user+0x430/0x430 [ 66.863263][ T8406] ? trace_hardirqs_on+0x67/0x220 [ 66.868285][ T8406] ? do_huge_pmd_anonymous_page+0x420/0x1660 [ 66.874248][ T8406] ? prep_transhuge_page+0xa0/0xa0 [ 66.879340][ T8406] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.885555][ T8406] ? __handle_mm_fault+0x7cb/0x3eb0 [ 66.890990][ T8406] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.897215][ T8406] ? __fget_light+0x1a9/0x230 [ 66.901964][ T8406] ? __fdget+0x1b/0x20 [ 66.906010][ T8406] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 66.912238][ T8406] __sys_sendmsg+0x105/0x1d0 [ 66.916803][ T8406] ? __ia32_sys_shutdown+0x80/0x80 [ 66.921905][ T8406] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 66.927336][ T8406] ? do_fast_syscall_32+0xd1/0xd7d [ 66.932510][ T8406] ? entry_SYSENTER_compat+0x70/0x7f [ 66.937779][ T8406] ? do_fast_syscall_32+0xd1/0xd7d [ 66.942876][ T8406] __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 66.948309][ T8406] do_fast_syscall_32+0x27b/0xd7d [ 66.953315][ T8406] entry_SYSENTER_compat+0x70/0x7f [ 66.958415][ T8406] RIP: 0023:0xf7f4f849 [ 66.962461][ T8406] 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 [ 66.982231][ T8406] RSP: 002b:00000000ffbe071c EFLAGS: 00000246 ORIG_RAX: 0000000000000172 [ 66.990620][ T8406] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000040 [ 66.998565][ T8406] RDX: 0000000000000000 RSI: 00000000080ea078 RDI: 00000000ffbe0770 [ 67.006520][ T8406] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 67.014466][ T8406] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 67.022416][ T8406] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 67.031629][ T8406] Kernel Offset: disabled [ 67.035950][ T8406] Rebooting in 86400 seconds..