[ 27.747721] audit: type=1800 audit(1539796469.747:27): pid=5244 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 27.787578] audit: type=1800 audit(1539796469.747:28): pid=5244 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. [ 28.693205] audit: type=1800 audit(1539796470.747:29): pid=5244 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 28.721210] audit: type=1800 audit(1539796470.747:30): pid=5244 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 '10.128.0.126' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 68.648449] kasan: CONFIG_KASAN_INLINE enabled [ 68.653189] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 68.660616] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 68.666856] CPU: 1 PID: 5399 Comm: syz-executor435 Not tainted 4.19.0-rc8+ #64 [ 68.674209] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.683570] RIP: 0010:rb_erase+0x306/0x3710 [ 68.687890] 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 [ 68.706792] RSP: 0018:ffff8801d7466918 EFLAGS: 00010202 [ 68.712158] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 68.719426] RDX: 1ffff1003ae8cd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 68.726844] RBP: ffff8801d7467320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 68.734249] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b6aef970 [ 68.741520] R13: dffffc0000000000 R14: ffff8801d74672f8 R15: ffff8801d7467438 [ 68.748793] FS: 0000000002371880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 68.757181] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.763059] CR2: 0000000020000080 CR3: 00000001d67d5000 CR4: 00000000001406e0 [ 68.770324] Call Trace: [ 68.772912] ? lockdep_on+0x50/0x50 [ 68.776537] ? rb_insert_color+0x1460/0x1460 [ 68.780940] ? lock_downgrade+0x900/0x900 [ 68.785087] ? noop_count+0x40/0x40 [ 68.788708] ? lock_pin_lock+0x350/0x350 [ 68.792879] ? rcu_bh_qs+0xc0/0xc0 [ 68.796419] ? unwind_dump+0x190/0x190 [ 68.800438] ? kasan_check_read+0x11/0x20 [ 68.804869] ? noop_count+0x40/0x40 [ 68.808515] ? lock_pin_lock+0x350/0x350 [ 68.812573] ? mark_held_locks+0x130/0x130 [ 68.816951] ? check_usage_forwards+0x3e0/0x3e0 [ 68.821630] ? __bfs+0x385/0x7a0 [ 68.824994] ? check_usage+0x1a9/0x790 [ 68.828878] ? lock_pin_lock+0x350/0x350 [ 68.833068] ? check_usage_forwards+0x3e0/0x3e0 [ 68.837753] ? __bfs+0x385/0x7a0 [ 68.841437] ? modules_open+0xa0/0xa0 [ 68.845355] ? lockdep_on+0x50/0x50 [ 68.849100] ? lock_pin_lock+0x350/0x350 [ 68.853250] ? mark_held_locks+0x130/0x130 [ 68.857511] ? kasan_check_read+0x11/0x20 [ 68.861674] ? __lock_acquire+0x2881/0x4ec0 [ 68.865996] ? mark_held_locks+0x130/0x130 [ 68.870330] ? print_usage_bug+0xc0/0xc0 [ 68.874395] ? _raw_spin_unlock+0x2c/0x50 [ 68.878546] ? graph_lock+0x170/0x170 [ 68.882616] ? ext4_exit_mballoc+0xc0/0xc0 [ 68.886851] ? __lock_acquire+0x7ec/0x4ec0 [ 68.891086] ? find_held_lock+0x36/0x1c0 [ 68.895241] ? mark_held_locks+0x130/0x130 [ 68.899500] ? lock_downgrade+0x900/0x900 [ 68.903644] ? ext4_es_scan+0x960/0x960 [ 68.907621] ? lock_release+0x970/0x970 [ 68.911720] ? do_raw_write_trylock+0x1c0/0x1c0 [ 68.916503] ? kasan_check_write+0x14/0x20 [ 68.920843] ? lock_acquire+0x1ed/0x520 [ 68.924934] ? integrity_inode_free+0x77/0x320 [ 68.929524] ? ext4_es_remove_extent+0x151/0x500 [ 68.934277] ? lock_release+0x970/0x970 [ 68.938249] ? kasan_check_write+0x14/0x20 [ 68.942501] ? do_raw_write_lock+0xbd/0x1b0 [ 68.946819] integrity_inode_free+0x12f/0x320 [ 68.951433] security_inode_free+0x19/0x90 [ 68.955697] __destroy_inode+0x328/0x820 [ 68.959753] ? generic_update_time+0x450/0x450 [ 68.964332] ? evict+0x5d8/0x980 [ 68.967695] ? lock_downgrade+0x900/0x900 [ 68.971956] ? __inode_wait_for_writeback+0x2cf/0x380 [ 68.977145] destroy_inode+0xda/0x200 [ 68.980947] ? __destroy_inode+0x820/0x820 [ 68.985175] ? kasan_check_write+0x14/0x20 [ 68.989409] ? do_raw_spin_lock+0xc1/0x200 [ 68.993781] evict+0x5e0/0x980 [ 68.996976] ? destroy_inode+0x200/0x200 [ 69.001030] ? iput+0x671/0xa90 [ 69.004589] ? lock_downgrade+0x900/0x900 [ 69.008738] ? kasan_check_read+0x11/0x20 [ 69.012887] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 69.017488] ? lock_downgrade+0x900/0x900 [ 69.021770] iput+0x679/0xa90 [ 69.024879] ? inode_add_lru+0x2a0/0x2a0 [ 69.029198] ? up_write+0x7b/0x220 [ 69.032739] ? up_read+0x110/0x110 [ 69.036389] ? up_read+0x110/0x110 [ 69.040042] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.045594] ? check_preemption_disabled+0x48/0x200 [ 69.050755] ext4_ioctl+0x236f/0x4210 [ 69.054561] ? is_bpf_text_address+0xac/0x170 [ 69.059067] ? ext4_ioctl_group_add+0x560/0x560 [ 69.063738] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 69.069532] ? kasan_check_read+0x11/0x20 [ 69.073779] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 69.079138] ? rcu_bh_qs+0xc0/0xc0 [ 69.082683] ? rcu_bh_qs+0xc0/0xc0 [ 69.086221] ? unwind_dump+0x190/0x190 [ 69.090107] ? is_bpf_text_address+0xd3/0x170 [ 69.094605] ? kernel_text_address+0x79/0xf0 [ 69.099029] ? __kernel_text_address+0xd/0x40 [ 69.103523] ? unwind_get_return_address+0x61/0xa0 [ 69.108447] ? __save_stack_trace+0x8d/0xf0 [ 69.112789] ? save_stack+0xa9/0xd0 [ 69.116409] ? save_stack+0x43/0xd0 [ 69.120032] ? __kasan_slab_free+0x102/0x150 [ 69.124434] ? kasan_slab_free+0xe/0x10 [ 69.128426] ? kmem_cache_free+0x83/0x290 [ 69.132584] ? putname+0xf2/0x130 [ 69.136032] ? do_sys_open+0x54d/0x700 [ 69.139915] ? __x64_sys_openat+0x9d/0x100 [ 69.144149] ? do_syscall_64+0x1b9/0x820 [ 69.148520] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.154041] ? trace_hardirqs_off+0xb8/0x310 [ 69.158448] ? kasan_check_read+0x11/0x20 [ 69.162626] ? do_raw_spin_unlock+0xa7/0x2f0 [ 69.167155] ? trace_hardirqs_on+0x310/0x310 [ 69.171797] ? kasan_check_write+0x14/0x20 [ 69.176032] ? trace_hardirqs_off+0xb8/0x310 [ 69.180445] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.186018] ? check_preemption_disabled+0x48/0x200 [ 69.191035] ? check_preemption_disabled+0x48/0x200 [ 69.196051] ? ext4_ioctl_group_add+0x560/0x560 [ 69.200720] do_vfs_ioctl+0x1de/0x1720 [ 69.204734] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 69.210227] ? ioctl_preallocate+0x300/0x300 [ 69.214642] ? memset+0x31/0x40 [ 69.218012] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.223568] ? smack_file_ioctl+0x210/0x3c0 [ 69.227890] ? fget_raw+0x20/0x20 [ 69.231340] ? smack_file_lock+0x2e0/0x2e0 [ 69.235574] ? do_syscall_64+0x9a/0x820 [ 69.239546] ? do_syscall_64+0x9a/0x820 [ 69.243717] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.249256] ? security_file_ioctl+0x94/0xc0 [ 69.253664] ksys_ioctl+0xa9/0xd0 [ 69.257111] __x64_sys_ioctl+0x73/0xb0 [ 69.260994] do_syscall_64+0x1b9/0x820 [ 69.264879] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 69.270237] ? syscall_return_slowpath+0x5e0/0x5e0 [ 69.275162] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 69.280130] ? trace_hardirqs_on_caller+0x310/0x310 [ 69.285143] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 69.290257] ? prepare_exit_to_usermode+0x291/0x3b0 [ 69.295282] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 69.300124] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.305306] RIP: 0033:0x440009 [ 69.308518] 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 [ 69.327558] RSP: 002b:00007ffd0a3ad958 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 69.335264] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 69.342693] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 69.350224] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 69.357657] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 69.365003] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 69.372276] Modules linked in: [ 69.375610] ---[ end trace 64febab931a4320e ]--- [ 69.380448] RIP: 0010:rb_erase+0x306/0x3710 [ 69.384795] 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 [ 69.403902] RSP: 0018:ffff8801d7466918 EFLAGS: 00010202 [ 69.409266] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 69.416630] RDX: 1ffff1003ae8cd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 69.424190] RBP: ffff8801d7467320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 69.431513] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b6aef970 [ 69.438922] R13: dffffc0000000000 R14: ffff8801d74672f8 R15: ffff8801d7467438 [ 69.446224] FS: 0000000002371880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 69.454483] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.460392] CR2: 0000000020000080 CR3: 00000001d67d5000 CR4: 00000000001406e0 [ 69.467661] Kernel panic - not syncing: Fatal exception [ 69.474128] Kernel Offset: disabled [ 69.477763] Rebooting in 86400 seconds..