[ 27.371259] audit: type=1800 audit(1539665100.661:27): pid=5255 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 27.413047] audit: type=1800 audit(1539665100.681:28): pid=5255 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 28.215235] audit: type=1800 audit(1539665101.561:29): pid=5255 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 28.235208] audit: type=1800 audit(1539665101.561:30): pid=5255 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 '10.128.0.59' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.037403] kasan: CONFIG_KASAN_INLINE enabled [ 39.042133] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.049530] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 39.055751] CPU: 1 PID: 5411 Comm: syz-executor057 Not tainted 4.19.0-rc8+ #62 [ 39.063092] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.072438] RIP: 0010:rb_erase+0x306/0x3710 [ 39.076742] 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 [ 39.095624] RSP: 0018:ffff8801d8e26918 EFLAGS: 00010202 [ 39.100969] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 39.108219] RDX: 1ffff1003b1c4d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 39.115470] RBP: ffff8801d8e27320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 39.122725] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b6adc970 [ 39.129978] R13: dffffc0000000000 R14: ffff8801d8e272f8 R15: ffff8801d8e27438 [ 39.137231] FS: 0000000001586880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 39.145437] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.151298] CR2: 0000000020000700 CR3: 00000001d7f71000 CR4: 00000000001406e0 [ 39.158547] Call Trace: [ 39.161118] ? lockdep_on+0x50/0x50 [ 39.164736] ? rb_insert_color+0x1460/0x1460 [ 39.169133] ? noop_count+0x40/0x40 [ 39.172750] ? lock_pin_lock+0x350/0x350 [ 39.176796] ? kasan_check_read+0x11/0x20 [ 39.180928] ? noop_count+0x40/0x40 [ 39.184536] ? lock_pin_lock+0x350/0x350 [ 39.188577] ? mark_held_locks+0x130/0x130 [ 39.192796] ? check_usage_forwards+0x3e0/0x3e0 [ 39.197447] ? __bfs+0x385/0x7a0 [ 39.200798] ? noop_count+0x40/0x40 [ 39.204413] ? check_usage+0x1a9/0x790 [ 39.208283] ? lock_pin_lock+0x350/0x350 [ 39.212398] ? check_usage_forwards+0x3e0/0x3e0 [ 39.217060] ? __bfs+0x385/0x7a0 [ 39.220410] ? modules_open+0xa0/0xa0 [ 39.224196] ? lockdep_on+0x50/0x50 [ 39.227808] ? lock_pin_lock+0x350/0x350 [ 39.231872] ? mark_held_locks+0x130/0x130 [ 39.236098] ? kasan_check_read+0x11/0x20 [ 39.240228] ? __lock_acquire+0x2881/0x4ec0 [ 39.244535] ? mark_held_locks+0x130/0x130 [ 39.248751] ? print_usage_bug+0xc0/0xc0 [ 39.252795] ? _raw_spin_unlock+0x2c/0x50 [ 39.256938] ? graph_lock+0x170/0x170 [ 39.260720] ? ext4_exit_mballoc+0xc0/0xc0 [ 39.264980] ? __lock_acquire+0x7ec/0x4ec0 [ 39.269207] ? find_held_lock+0x36/0x1c0 [ 39.273255] ? mark_held_locks+0x130/0x130 [ 39.277508] ? lock_downgrade+0x900/0x900 [ 39.281653] ? ext4_es_scan+0x960/0x960 [ 39.285611] ? lock_release+0x970/0x970 [ 39.289570] ? do_raw_write_trylock+0x1c0/0x1c0 [ 39.294223] ? kasan_check_write+0x14/0x20 [ 39.298444] ? lock_acquire+0x1ed/0x520 [ 39.302401] ? integrity_inode_free+0x77/0x320 [ 39.306964] ? ext4_es_remove_extent+0x151/0x500 [ 39.311708] ? lock_release+0x970/0x970 [ 39.315670] ? kasan_check_write+0x14/0x20 [ 39.319888] ? do_raw_write_lock+0xbd/0x1b0 [ 39.324196] integrity_inode_free+0x12f/0x320 [ 39.328675] security_inode_free+0x19/0x90 [ 39.332892] __destroy_inode+0x328/0x820 [ 39.336937] ? generic_update_time+0x450/0x450 [ 39.341500] ? evict+0x5d8/0x980 [ 39.344851] ? lock_downgrade+0x900/0x900 [ 39.348980] ? __inode_wait_for_writeback+0x2cf/0x380 [ 39.354154] destroy_inode+0xda/0x200 [ 39.357977] ? __destroy_inode+0x820/0x820 [ 39.362202] ? kasan_check_write+0x14/0x20 [ 39.366422] ? do_raw_spin_lock+0xc1/0x200 [ 39.370640] evict+0x5e0/0x980 [ 39.373818] ? destroy_inode+0x200/0x200 [ 39.377863] ? iput+0x671/0xa90 [ 39.381123] ? lock_downgrade+0x900/0x900 [ 39.385256] ? kasan_check_read+0x11/0x20 [ 39.389386] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 39.393954] ? lock_downgrade+0x900/0x900 [ 39.398087] iput+0x679/0xa90 [ 39.401176] ? inode_add_lru+0x2a0/0x2a0 [ 39.405218] ? up_write+0x7b/0x220 [ 39.408780] ? up_read+0x110/0x110 [ 39.412306] ? up_read+0x110/0x110 [ 39.415829] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.421348] ? check_preemption_disabled+0x48/0x200 [ 39.426352] ext4_ioctl+0x236f/0x4210 [ 39.430135] ? ext4_ioctl_group_add+0x560/0x560 [ 39.434789] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 39.440569] ? kasan_check_read+0x11/0x20 [ 39.444707] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 39.449966] ? rcu_bh_qs+0xc0/0xc0 [ 39.453489] ? rcu_bh_qs+0xc0/0xc0 [ 39.457009] ? unwind_dump+0x190/0x190 [ 39.460880] ? is_bpf_text_address+0xd3/0x170 [ 39.465373] ? kernel_text_address+0x79/0xf0 [ 39.469761] ? __kernel_text_address+0xd/0x40 [ 39.474242] ? unwind_get_return_address+0x61/0xa0 [ 39.479161] ? __save_stack_trace+0x8d/0xf0 [ 39.483474] ? save_stack+0xa9/0xd0 [ 39.487085] ? save_stack+0x43/0xd0 [ 39.490693] ? __kasan_slab_free+0x102/0x150 [ 39.495085] ? kasan_slab_free+0xe/0x10 [ 39.499050] ? kmem_cache_free+0x83/0x290 [ 39.503180] ? putname+0xf2/0x130 [ 39.506612] ? do_sys_open+0x54d/0x700 [ 39.510475] ? __x64_sys_open+0x7e/0xc0 [ 39.514433] ? do_syscall_64+0x1b9/0x820 [ 39.518478] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.523830] ? trace_hardirqs_off+0xb8/0x310 [ 39.528223] ? kasan_check_read+0x11/0x20 [ 39.532353] ? do_raw_spin_unlock+0xa7/0x2f0 [ 39.536741] ? trace_hardirqs_on+0x310/0x310 [ 39.541134] ? kasan_check_write+0x14/0x20 [ 39.545363] ? trace_hardirqs_off+0xb8/0x310 [ 39.549756] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.555293] ? check_preemption_disabled+0x48/0x200 [ 39.560291] ? ext4_ioctl_group_add+0x560/0x560 [ 39.564946] do_vfs_ioctl+0x1de/0x1720 [ 39.568821] ? rcu_lockdep_current_cpu_online+0x1f0/0x2d0 [ 39.574342] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 39.579604] ? ioctl_preallocate+0x300/0x300 [ 39.583996] ? memset+0x31/0x40 [ 39.587260] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.592798] ? smack_file_ioctl+0x210/0x3c0 [ 39.597101] ? fget_raw+0x20/0x20 [ 39.600538] ? smack_file_lock+0x2e0/0x2e0 [ 39.604793] ? rcu_read_lock_sched_held+0x108/0x120 [ 39.609800] ? do_syscall_64+0x9a/0x820 [ 39.613757] ? do_syscall_64+0x9a/0x820 [ 39.617716] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 39.623237] ? security_file_ioctl+0x94/0xc0 [ 39.627640] ksys_ioctl+0xa9/0xd0 [ 39.631108] __x64_sys_ioctl+0x73/0xb0 [ 39.634977] do_syscall_64+0x1b9/0x820 [ 39.638848] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 39.644198] ? syscall_return_slowpath+0x5e0/0x5e0 [ 39.649115] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.653942] ? trace_hardirqs_on_caller+0x310/0x310 [ 39.658937] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 39.664010] ? prepare_exit_to_usermode+0x291/0x3b0 [ 39.669052] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 39.673897] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.679067] RIP: 0033:0x440029 [ 39.682250] 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 [ 39.701134] RSP: 002b:00007ffffa5c0968 EFLAGS: 00000207 ORIG_RAX: 0000000000000010 [ 39.708863] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440029 [ 39.716148] RDX: 0000000000440029 RSI: 0000000000006611 RDI: 0000000000000003 [ 39.723401] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 39.730655] R10: 0000000000000000 R11: 0000000000000207 R12: 00000000004018b0 [ 39.737909] R13: 0000000000401940 R14: 0000000000000000 R15: 0000000000000000 [ 39.745165] Modules linked in: [ 39.748454] ---[ end trace fef2022e0998d8dc ]--- [ 39.753264] RIP: 0010:rb_erase+0x306/0x3710 [ 39.757596] 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 [ 39.776574] RSP: 0018:ffff8801d8e26918 EFLAGS: 00010202 [ 39.781978] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 39.789247] RDX: 1ffff1003b1c4d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 39.796652] RBP: ffff8801d8e27320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 39.803958] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b6adc970 [ 39.811226] R13: dffffc0000000000 R14: ffff8801d8e272f8 R15: ffff8801d8e27438 [ 39.818513] FS: 0000000001586880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 39.826751] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.832652] CR2: 0000000020000700 CR3: 00000001d7f71000 CR4: 00000000001406e0 [ 39.840017] Kernel panic - not syncing: Fatal exception [ 39.846150] Kernel Offset: disabled [ 39.849771] Rebooting in 86400 seconds..