[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 26.720865] kauditd_printk_skb: 7 callbacks suppressed [ 26.720877] audit: type=1800 audit(1538394662.701:29): pid=5238 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 26.750256] audit: type=1800 audit(1538394662.701:30): pid=5238 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.56' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 52.480984] kasan: CONFIG_KASAN_INLINE enabled [ 52.485659] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 52.493265] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 52.499516] CPU: 0 PID: 5394 Comm: syz-executor255 Not tainted 4.19.0-rc6+ #39 [ 52.506868] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.516336] RIP: 0010:rb_erase+0x306/0x3710 [ 52.520738] Code: c7 81 28 01 00 00 f2 f2 f2 f2 c7 81 2c 01 00 00 00 f2 f2 f2 48 89 f9 65 48 8b 1c 25 28 00 00 00 48 89 5d d0 31 db 48 c1 e9 03 <42> 80 3c 01 00 0f 85 41 1c 00 00 4c 8d 48 10 4c 8b 78 08 48 b9 00 [ 52.539758] RSP: 0018:ffff8801cbfee918 EFLAGS: 00010202 [ 52.545107] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 52.552363] RDX: 1ffff100397fdd2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 52.559624] RBP: ffff8801cbfef320 R08: dffffc0000000000 R09: fffffbfff12d6a48 [ 52.566880] R10: fffffbfff12d6a48 R11: ffffffff896b5243 R12: ffff8801b6a941f0 [ 52.574137] R13: dffffc0000000000 R14: ffff8801cbfef2f8 R15: ffff8801cbfef438 [ 52.581393] FS: 0000000002245880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 52.589595] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.595473] CR2: 0000000020000080 CR3: 00000001ba4df000 CR4: 00000000001406f0 [ 52.602741] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.609998] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.617247] Call Trace: [ 52.619820] ? lockdep_on+0x50/0x50 [ 52.623435] ? rb_insert_color+0x1460/0x1460 [ 52.627833] ? noop_count+0x40/0x40 [ 52.631466] ? lock_pin_lock+0x350/0x350 [ 52.635508] ? noop_count+0x40/0x40 [ 52.639131] ? kasan_check_read+0x11/0x20 [ 52.643261] ? noop_count+0x40/0x40 [ 52.646869] ? lock_pin_lock+0x350/0x350 [ 52.650926] ? mark_held_locks+0x130/0x130 [ 52.655144] ? check_usage_forwards+0x3e0/0x3e0 [ 52.659800] ? __bfs+0x385/0x7a0 [ 52.663149] ? noop_count+0x40/0x40 [ 52.666764] ? check_usage+0x1a9/0x790 [ 52.670632] ? lock_pin_lock+0x350/0x350 [ 52.674692] ? check_usage_forwards+0x3e0/0x3e0 [ 52.679470] ? __bfs+0x385/0x7a0 [ 52.682822] ? __lock_acquire+0x7ec/0x4ec0 [ 52.687038] ? lockdep_on+0x50/0x50 [ 52.690668] ? lock_pin_lock+0x350/0x350 [ 52.694713] ? mark_held_locks+0x130/0x130 [ 52.698928] ? kasan_check_read+0x11/0x20 [ 52.703133] ? __lock_acquire+0x2881/0x4ec0 [ 52.707448] ? mark_held_locks+0x130/0x130 [ 52.711726] ? print_usage_bug+0xc0/0xc0 [ 52.715777] ? _raw_spin_unlock+0x2c/0x50 [ 52.719908] ? graph_lock+0x170/0x170 [ 52.723707] ? ext4_exit_mballoc+0xc0/0xc0 [ 52.728042] ? __lock_acquire+0x7ec/0x4ec0 [ 52.732261] ? find_held_lock+0x36/0x1c0 [ 52.736355] ? mark_held_locks+0x130/0x130 [ 52.740791] ? lock_downgrade+0x900/0x900 [ 52.744920] ? ext4_es_scan+0x960/0x960 [ 52.748873] ? lock_release+0x970/0x970 [ 52.752834] ? do_raw_write_trylock+0x1c0/0x1c0 [ 52.757579] ? kasan_check_write+0x14/0x20 [ 52.761802] ? lock_acquire+0x1ed/0x520 [ 52.765759] ? integrity_inode_free+0x77/0x320 [ 52.770447] ? ext4_es_remove_extent+0x151/0x500 [ 52.775324] ? lock_release+0x970/0x970 [ 52.779283] ? kasan_check_write+0x14/0x20 [ 52.783505] ? do_raw_write_lock+0xbd/0x1b0 [ 52.787820] integrity_inode_free+0x12f/0x320 [ 52.792305] security_inode_free+0x19/0x90 [ 52.796652] __destroy_inode+0x328/0x820 [ 52.800698] ? generic_update_time+0x450/0x450 [ 52.805364] ? evict+0x5d8/0x980 [ 52.808717] ? lock_downgrade+0x900/0x900 [ 52.812852] ? __inode_wait_for_writeback+0x2cf/0x380 [ 52.818276] destroy_inode+0xda/0x200 [ 52.822060] ? __destroy_inode+0x820/0x820 [ 52.826405] ? kasan_check_write+0x14/0x20 [ 52.830632] ? do_raw_spin_lock+0xc1/0x200 [ 52.834847] evict+0x5e0/0x980 [ 52.838020] ? destroy_inode+0x200/0x200 [ 52.842062] ? iput+0x671/0xa90 [ 52.845340] ? lock_downgrade+0x900/0x900 [ 52.849472] ? kasan_check_read+0x11/0x20 [ 52.853607] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 52.858172] ? lock_downgrade+0x900/0x900 [ 52.862302] iput+0x679/0xa90 [ 52.865405] ? inode_add_lru+0x2a0/0x2a0 [ 52.869443] ? up_write+0x7b/0x220 [ 52.872963] ? up_read+0x110/0x110 [ 52.876480] ? up_read+0x110/0x110 [ 52.880017] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.885543] ? check_preemption_disabled+0x48/0x200 [ 52.890548] ext4_ioctl+0x236f/0x4210 [ 52.894334] ? is_bpf_text_address+0xac/0x170 [ 52.898811] ? ext4_ioctl_group_add+0x560/0x560 [ 52.903465] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 52.909245] ? kasan_check_read+0x11/0x20 [ 52.913382] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 52.918771] ? rcu_bh_qs+0xc0/0xc0 [ 52.922294] ? rcu_bh_qs+0xc0/0xc0 [ 52.925812] ? unwind_dump+0x190/0x190 [ 52.929805] ? is_bpf_text_address+0xd3/0x170 [ 52.934290] ? kernel_text_address+0x79/0xf0 [ 52.938678] ? __kernel_text_address+0xd/0x40 [ 52.943234] ? unwind_get_return_address+0x61/0xa0 [ 52.948203] ? __save_stack_trace+0x8d/0xf0 [ 52.952526] ? save_stack+0xa9/0xd0 [ 52.956139] ? save_stack+0x43/0xd0 [ 52.959748] ? __kasan_slab_free+0x102/0x150 [ 52.964153] ? kasan_slab_free+0xe/0x10 [ 52.968107] ? kmem_cache_free+0x83/0x290 [ 52.972240] ? putname+0xf2/0x130 [ 52.975673] ? do_sys_open+0x54d/0x700 [ 52.979560] ? __x64_sys_openat+0x9d/0x100 [ 52.983781] ? do_syscall_64+0x1b9/0x820 [ 52.987823] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.993174] ? trace_hardirqs_off+0xb8/0x310 [ 52.997563] ? kasan_check_read+0x11/0x20 [ 53.001696] ? do_raw_spin_unlock+0xa7/0x2f0 [ 53.006084] ? trace_hardirqs_on+0x310/0x310 [ 53.010473] ? kasan_check_write+0x14/0x20 [ 53.014690] ? trace_hardirqs_off+0xb8/0x310 [ 53.019183] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.024808] ? check_preemption_disabled+0x48/0x200 [ 53.029928] ? check_preemption_disabled+0x48/0x200 [ 53.034942] ? ext4_ioctl_group_add+0x560/0x560 [ 53.039599] do_vfs_ioctl+0x1de/0x1720 [ 53.043472] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 53.048731] ? ioctl_preallocate+0x300/0x300 [ 53.053130] ? memset+0x31/0x40 [ 53.056410] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.061929] ? smack_file_ioctl+0x210/0x3c0 [ 53.066262] ? fget_raw+0x20/0x20 [ 53.069700] ? smack_file_lock+0x2e0/0x2e0 [ 53.073922] ? do_syscall_64+0x9a/0x820 [ 53.077889] ? do_syscall_64+0x9a/0x820 [ 53.081944] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.087466] ? security_file_ioctl+0x94/0xc0 [ 53.091872] ksys_ioctl+0xa9/0xd0 [ 53.095569] __x64_sys_ioctl+0x73/0xb0 [ 53.099439] do_syscall_64+0x1b9/0x820 [ 53.103323] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 53.108674] ? syscall_return_slowpath+0x5e0/0x5e0 [ 53.113589] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 53.118419] ? trace_hardirqs_on_caller+0x310/0x310 [ 53.123460] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 53.128464] ? prepare_exit_to_usermode+0x291/0x3b0 [ 53.133709] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 53.138542] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.143713] RIP: 0033:0x440089 [ 53.146884] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 53.165769] RSP: 002b:00007fff1dbe9cf8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 53.173472] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 53.180730] RDX: 0000000000440089 RSI: 0000000000006611 RDI: 0000000000000003 [ 53.188083] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 53.195351] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 53.202824] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 53.210090] Modules linked in: [ 53.213365] ---[ end trace 732e0b5d02febe69 ]--- [ 53.218116] RIP: 0010:rb_erase+0x306/0x3710 [ 53.222506] Code: c7 81 28 01 00 00 f2 f2 f2 f2 c7 81 2c 01 00 00 00 f2 f2 f2 48 89 f9 65 48 8b 1c 25 28 00 00 00 48 89 5d d0 31 db 48 c1 e9 03 <42> 80 3c 01 00 0f 85 41 1c 00 00 4c 8d 48 10 4c 8b 78 08 48 b9 00 [ 53.241513] RSP: 0018:ffff8801cbfee918 EFLAGS: 00010202 [ 53.246878] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 53.254150] RDX: 1ffff100397fdd2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 53.261555] RBP: ffff8801cbfef320 R08: dffffc0000000000 R09: fffffbfff12d6a48 [ 53.268940] R10: fffffbfff12d6a48 R11: ffffffff896b5243 R12: ffff8801b6a941f0 [ 53.276232] R13: dffffc0000000000 R14: ffff8801cbfef2f8 R15: ffff8801cbfef438 [ 53.283518] FS: 0000000002245880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 53.291758] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 53.297636] CR2: 0000000020000080 CR3: 00000001ba4df000 CR4: 00000000001406f0 [ 53.304922] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 53.312214] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 53.319488] Kernel panic - not syncing: Fatal exception [ 53.325779] Kernel Offset: disabled [ 53.329400] Rebooting in 86400 seconds..