[ 27.413175] audit: type=1800 audit(1540316103.213:27): pid=5250 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 27.450525] audit: type=1800 audit(1540316103.293:28): pid=5250 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. [ 28.215966] audit: type=1800 audit(1540316104.063:29): pid=5250 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 28.243456] audit: type=1800 audit(1540316104.063:30): pid=5250 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 '10.128.0.72' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.853411] kasan: CONFIG_KASAN_INLINE enabled [ 39.858117] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 39.865529] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 39.871772] CPU: 0 PID: 5406 Comm: syz-executor255 Not tainted 4.19.0+ #76 [ 39.878764] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.888110] RIP: 0010:rb_erase+0x306/0x3710 [ 39.892414] 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 [ 39.911341] RSP: 0018:ffff8801ba09e918 EFLAGS: 00010202 [ 39.916734] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 39.923997] RDX: 1ffff10037413d2b RSI: ffffffff8afbf860 RDI: 0000000000000008 [ 39.931253] RBP: ffff8801ba09f320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 39.938506] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b66db970 [ 39.945760] R13: dffffc0000000000 R14: ffff8801ba09f2f8 R15: ffff8801ba09f438 [ 39.953017] FS: 0000000001371880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 39.961229] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 39.967096] CR2: 0000000020000080 CR3: 00000001d715d000 CR4: 00000000001406f0 [ 39.974349] Call Trace: [ 39.976922] ? lockdep_on+0x50/0x50 [ 39.980532] ? rb_insert_color+0x1460/0x1460 [ 39.984928] ? lock_downgrade+0x900/0x900 [ 39.989058] ? noop_count+0x40/0x40 [ 39.992682] ? lock_pin_lock+0x350/0x350 [ 39.996765] ? rcu_bh_qs+0xc0/0xc0 [ 40.000287] ? unwind_dump+0x190/0x190 [ 40.004163] ? kasan_check_read+0x11/0x20 [ 40.008295] ? noop_count+0x40/0x40 [ 40.011905] ? lock_pin_lock+0x350/0x350 [ 40.015948] ? mark_held_locks+0x130/0x130 [ 40.020176] ? check_usage_forwards+0x3e0/0x3e0 [ 40.024826] ? __bfs+0x385/0x7a0 [ 40.028178] ? check_usage+0x1a9/0x790 [ 40.032156] ? lock_pin_lock+0x350/0x350 [ 40.036208] ? check_usage_forwards+0x3e0/0x3e0 [ 40.040862] ? __bfs+0x385/0x7a0 [ 40.044264] ? modules_open+0xa0/0xa0 [ 40.048063] ? lockdep_on+0x50/0x50 [ 40.051678] ? lock_pin_lock+0x350/0x350 [ 40.055730] ? mark_held_locks+0x130/0x130 [ 40.059959] ? kasan_check_read+0x11/0x20 [ 40.064093] ? __lock_acquire+0x2881/0x4ec0 [ 40.068399] ? mark_held_locks+0x130/0x130 [ 40.072616] ? print_usage_bug+0xc0/0xc0 [ 40.076666] ? _raw_spin_unlock+0x2c/0x50 [ 40.080804] ? graph_lock+0x170/0x170 [ 40.084589] ? ext4_exit_mballoc+0xc0/0xc0 [ 40.088825] ? __lock_acquire+0x7ec/0x4ec0 [ 40.093046] ? find_held_lock+0x36/0x1c0 [ 40.097096] ? mark_held_locks+0x130/0x130 [ 40.101314] ? lock_downgrade+0x900/0x900 [ 40.105452] ? ext4_es_scan+0x960/0x960 [ 40.109412] ? lock_release+0x970/0x970 [ 40.113375] ? do_raw_write_trylock+0x1c0/0x1c0 [ 40.118030] ? kasan_check_write+0x14/0x20 [ 40.122245] ? lock_acquire+0x1ed/0x520 [ 40.126202] ? integrity_inode_free+0x77/0x320 [ 40.130766] ? ext4_es_remove_extent+0x151/0x500 [ 40.135506] ? lock_release+0x970/0x970 [ 40.139464] ? kasan_check_write+0x14/0x20 [ 40.143682] ? do_raw_write_lock+0xbd/0x1e0 [ 40.147989] integrity_inode_free+0x12f/0x320 [ 40.152470] security_inode_free+0x19/0x90 [ 40.156695] __destroy_inode+0x328/0x820 [ 40.160748] ? generic_update_time+0x450/0x450 [ 40.165317] ? evict+0x5d8/0x980 [ 40.168669] ? lock_downgrade+0x900/0x900 [ 40.172799] ? __inode_wait_for_writeback+0x2cf/0x380 [ 40.177997] destroy_inode+0xda/0x200 [ 40.181784] ? __destroy_inode+0x820/0x820 [ 40.186006] ? kasan_check_write+0x14/0x20 [ 40.190222] ? do_raw_spin_lock+0xc1/0x230 [ 40.194442] evict+0x5e0/0x980 [ 40.197622] ? destroy_inode+0x200/0x200 [ 40.201668] ? iput+0x671/0xa90 [ 40.204932] ? lock_downgrade+0x900/0x900 [ 40.209071] ? kasan_check_read+0x11/0x20 [ 40.213201] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 40.217771] ? lock_downgrade+0x900/0x900 [ 40.221918] iput+0x679/0xa90 [ 40.225015] ? inode_add_lru+0x2a0/0x2a0 [ 40.229059] ? up_write+0x7b/0x220 [ 40.232583] ? up_read+0x110/0x110 [ 40.236117] ? up_read+0x110/0x110 [ 40.239644] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.245162] ? check_preemption_disabled+0x48/0x280 [ 40.250164] ext4_ioctl+0x236f/0x4210 [ 40.253948] ? is_bpf_text_address+0xac/0x170 [ 40.258434] ? ext4_ioctl_group_add+0x560/0x560 [ 40.263087] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 40.268867] ? kasan_check_read+0x11/0x20 [ 40.273007] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 40.278267] ? rcu_bh_qs+0xc0/0xc0 [ 40.281789] ? rcu_bh_qs+0xc0/0xc0 [ 40.285313] ? unwind_dump+0x190/0x190 [ 40.289185] ? is_bpf_text_address+0xd3/0x170 [ 40.293668] ? kernel_text_address+0x79/0xf0 [ 40.298100] ? __kernel_text_address+0xd/0x40 [ 40.302629] ? unwind_get_return_address+0x61/0xa0 [ 40.307608] ? __save_stack_trace+0x8d/0xf0 [ 40.311919] ? save_stack+0xa9/0xd0 [ 40.315530] ? save_stack+0x43/0xd0 [ 40.319136] ? __kasan_slab_free+0x102/0x150 [ 40.323524] ? kasan_slab_free+0xe/0x10 [ 40.327483] ? kmem_cache_free+0x83/0x290 [ 40.331608] ? putname+0xf2/0x130 [ 40.335060] ? do_sys_open+0x54d/0x700 [ 40.338926] ? __x64_sys_openat+0x9d/0x100 [ 40.343148] ? do_syscall_64+0x1b9/0x820 [ 40.347195] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.352542] ? trace_hardirqs_off+0xb8/0x310 [ 40.356935] ? kasan_check_read+0x11/0x20 [ 40.361072] ? do_raw_spin_unlock+0xa7/0x330 [ 40.365476] ? trace_hardirqs_on+0x310/0x310 [ 40.369880] ? kasan_check_write+0x14/0x20 [ 40.374098] ? trace_hardirqs_off+0xb8/0x310 [ 40.378489] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.384015] ? check_preemption_disabled+0x48/0x280 [ 40.389016] ? check_preemption_disabled+0x48/0x280 [ 40.394018] ? ext4_ioctl_group_add+0x560/0x560 [ 40.398670] do_vfs_ioctl+0x1de/0x1720 [ 40.402540] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 40.407805] ? ioctl_preallocate+0x300/0x300 [ 40.412195] ? memset+0x31/0x40 [ 40.415456] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.420994] ? smack_file_ioctl+0x210/0x3c0 [ 40.425305] ? fget_raw+0x20/0x20 [ 40.428743] ? smack_file_lock+0x2e0/0x2e0 [ 40.432969] ? do_syscall_64+0x9a/0x820 [ 40.436925] ? do_syscall_64+0x9a/0x820 [ 40.440964] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.446501] ? security_file_ioctl+0x94/0xc0 [ 40.450892] ksys_ioctl+0xa9/0xd0 [ 40.454334] __x64_sys_ioctl+0x73/0xb0 [ 40.458206] do_syscall_64+0x1b9/0x820 [ 40.462077] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 40.467439] ? syscall_return_slowpath+0x5e0/0x5e0 [ 40.472418] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.477251] ? trace_hardirqs_on_caller+0x310/0x310 [ 40.482253] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 40.487252] ? prepare_exit_to_usermode+0x291/0x3b0 [ 40.492254] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.497131] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.502307] RIP: 0033:0x440009 [ 40.505486] 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 [ 40.524383] RSP: 002b:00007ffcc6b29838 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 40.532080] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 40.539398] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 40.546658] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 40.553936] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 40.561213] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 40.568471] Modules linked in: [ 40.571843] ---[ end trace be5da1f3e6558922 ]--- [ 40.576759] RIP: 0010:rb_erase+0x306/0x3710 [ 40.581076] 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 [ 40.600049] RSP: 0018:ffff8801ba09e918 EFLAGS: 00010202 [ 40.605448] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 40.612705] RDX: 1ffff10037413d2b RSI: ffffffff8afbf860 RDI: 0000000000000008 [ 40.620022] RBP: ffff8801ba09f320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 40.627380] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b66db970 [ 40.634681] R13: dffffc0000000000 R14: ffff8801ba09f2f8 R15: ffff8801ba09f438 [ 40.642061] FS: 0000000001371880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 40.650333] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.656230] CR2: 0000000020000080 CR3: 00000001d715d000 CR4: 00000000001406f0 [ 40.663535] Kernel panic - not syncing: Fatal exception [ 40.669760] Kernel Offset: disabled [ 40.673382] Rebooting in 86400 seconds..