[....] 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. [ 26.387836] kauditd_printk_skb: 7 callbacks suppressed [ 26.387851] audit: type=1800 audit(1540287196.891:29): pid=5207 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 26.414149] audit: type=1800 audit(1540287196.901:30): pid=5207 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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 '10.128.0.6' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.115067] kasan: CONFIG_KASAN_INLINE enabled [ 37.119877] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 37.127258] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 37.133479] CPU: 1 PID: 5361 Comm: syz-executor005 Not tainted 4.19.0-rc8+ #152 [ 37.140914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.150276] RIP: 0010:rb_erase+0x306/0x3710 [ 37.154599] 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 [ 37.173484] RSP: 0018:ffff8801b76d6918 EFLAGS: 00010202 [ 37.179020] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 37.186273] RDX: 1ffff10036edad2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 37.193531] RBP: ffff8801b76d7320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 37.200781] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801c2c01530 [ 37.208032] R13: dffffc0000000000 R14: ffff8801b76d72f8 R15: ffff8801b76d7438 [ 37.215283] FS: 0000000000b5b880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 37.223496] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.229360] CR2: 0000000020000080 CR3: 00000001d8a0e000 CR4: 00000000001406e0 [ 37.236613] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.243864] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.251112] Call Trace: [ 37.253690] ? lockdep_on+0x50/0x50 [ 37.257303] ? rb_insert_color+0x1460/0x1460 [ 37.261695] ? noop_count+0x40/0x40 [ 37.265303] ? lock_pin_lock+0x350/0x350 [ 37.269352] ? rcu_bh_qs+0xc0/0xc0 [ 37.272873] ? unwind_dump+0x190/0x190 [ 37.276746] ? kasan_check_read+0x11/0x20 [ 37.280875] ? __lock_acquire+0x2881/0x4ec0 [ 37.285187] ? noop_count+0x40/0x40 [ 37.288797] ? lock_pin_lock+0x350/0x350 [ 37.292839] ? mark_held_locks+0x130/0x130 [ 37.297058] ? check_usage_forwards+0x3e0/0x3e0 [ 37.301716] ? __bfs+0x385/0x7a0 [ 37.305065] ? check_usage+0x1a9/0x790 [ 37.308932] ? lock_pin_lock+0x350/0x350 [ 37.312973] ? check_usage_forwards+0x3e0/0x3e0 [ 37.317786] ? __bfs+0x385/0x7a0 [ 37.321138] ? modules_open+0xa0/0xa0 [ 37.324918] ? lockdep_on+0x50/0x50 [ 37.328531] ? lock_pin_lock+0x350/0x350 [ 37.332576] ? mark_held_locks+0x130/0x130 [ 37.336796] ? kasan_check_read+0x11/0x20 [ 37.340925] ? __lock_acquire+0x2881/0x4ec0 [ 37.345233] ? mark_held_locks+0x130/0x130 [ 37.349451] ? print_usage_bug+0xc0/0xc0 [ 37.353496] ? _raw_spin_unlock+0x2c/0x50 [ 37.357631] ? graph_lock+0x170/0x170 [ 37.361417] ? ext4_exit_mballoc+0xc0/0xc0 [ 37.365636] ? __lock_acquire+0x7ec/0x4ec0 [ 37.369854] ? find_held_lock+0x36/0x1c0 [ 37.373896] ? mark_held_locks+0x130/0x130 [ 37.378127] ? lock_downgrade+0x900/0x900 [ 37.382260] ? ext4_es_scan+0x960/0x960 [ 37.386216] ? lock_release+0x970/0x970 [ 37.390177] ? do_raw_write_trylock+0x1c0/0x1c0 [ 37.394830] ? kasan_check_write+0x14/0x20 [ 37.399048] ? lock_acquire+0x1ed/0x520 [ 37.403014] ? integrity_inode_free+0x77/0x320 [ 37.407579] ? ext4_es_remove_extent+0x151/0x500 [ 37.412317] ? lock_release+0x970/0x970 [ 37.416278] ? kasan_check_write+0x14/0x20 [ 37.420495] ? do_raw_write_lock+0xbd/0x1e0 [ 37.424805] integrity_inode_free+0x12f/0x320 [ 37.429288] security_inode_free+0x19/0x90 [ 37.433509] __destroy_inode+0x328/0x820 [ 37.437552] ? generic_update_time+0x450/0x450 [ 37.442115] ? evict+0x5d8/0x980 [ 37.445462] ? lock_downgrade+0x900/0x900 [ 37.449607] ? __inode_wait_for_writeback+0x2cf/0x380 [ 37.454791] destroy_inode+0xda/0x200 [ 37.458574] ? __destroy_inode+0x820/0x820 [ 37.462793] ? kasan_check_write+0x14/0x20 [ 37.467026] ? do_raw_spin_lock+0xc1/0x230 [ 37.471246] evict+0x5e0/0x980 [ 37.474421] ? destroy_inode+0x200/0x200 [ 37.478464] ? iput+0x671/0xa90 [ 37.481727] ? lock_downgrade+0x900/0x900 [ 37.485861] ? kasan_check_read+0x11/0x20 [ 37.489998] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 37.494565] ? lock_downgrade+0x900/0x900 [ 37.498713] iput+0x679/0xa90 [ 37.501802] ? inode_add_lru+0x2a0/0x2a0 [ 37.505846] ? up_write+0x7b/0x220 [ 37.509381] ? up_read+0x110/0x110 [ 37.512902] ? up_read+0x110/0x110 [ 37.516425] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.521947] ? check_preemption_disabled+0x48/0x280 [ 37.526949] ext4_ioctl+0x236f/0x4210 [ 37.530748] ? is_bpf_text_address+0xac/0x170 [ 37.535226] ? ext4_ioctl_group_add+0x560/0x560 [ 37.539881] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 37.545665] ? kasan_check_read+0x11/0x20 [ 37.549798] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 37.555057] ? rcu_bh_qs+0xc0/0xc0 [ 37.558581] ? rcu_bh_qs+0xc0/0xc0 [ 37.562105] ? unwind_dump+0x190/0x190 [ 37.565991] ? is_bpf_text_address+0xd3/0x170 [ 37.570480] ? kernel_text_address+0x79/0xf0 [ 37.574884] ? __kernel_text_address+0xd/0x40 [ 37.579364] ? unwind_get_return_address+0x61/0xa0 [ 37.584281] ? __save_stack_trace+0x8d/0xf0 [ 37.588587] ? save_stack+0xa9/0xd0 [ 37.592208] ? save_stack+0x43/0xd0 [ 37.595812] ? __kasan_slab_free+0x102/0x150 [ 37.600198] ? kasan_slab_free+0xe/0x10 [ 37.604154] ? kmem_cache_free+0x83/0x290 [ 37.608283] ? putname+0xf2/0x130 [ 37.611720] ? do_sys_open+0x54d/0x700 [ 37.615598] ? __x64_sys_openat+0x9d/0x100 [ 37.619816] ? do_syscall_64+0x1b9/0x820 [ 37.623860] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.629211] ? trace_hardirqs_off+0xb8/0x310 [ 37.633600] ? kasan_check_read+0x11/0x20 [ 37.637748] ? do_raw_spin_unlock+0xa7/0x330 [ 37.642137] ? trace_hardirqs_on+0x310/0x310 [ 37.646528] ? kasan_check_write+0x14/0x20 [ 37.650758] ? trace_hardirqs_off+0xb8/0x310 [ 37.655150] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.660673] ? check_preemption_disabled+0x48/0x280 [ 37.665672] ? check_preemption_disabled+0x48/0x280 [ 37.670670] ? ext4_ioctl_group_add+0x560/0x560 [ 37.675411] do_vfs_ioctl+0x1de/0x1720 [ 37.679285] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 37.684545] ? ioctl_preallocate+0x300/0x300 [ 37.688938] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.694458] ? __fget_light+0x2e9/0x430 [ 37.698412] ? fget_raw+0x20/0x20 [ 37.701845] ? putname+0xf2/0x130 [ 37.705282] ? rcu_read_lock_sched_held+0x108/0x120 [ 37.710284] ? kmem_cache_free+0x24f/0x290 [ 37.714501] ? putname+0xf7/0x130 [ 37.717946] ? do_syscall_64+0x9a/0x820 [ 37.721900] ? do_syscall_64+0x9a/0x820 [ 37.725856] ? lockdep_hardirqs_on+0x421/0x5c0 [ 37.730424] ? security_file_ioctl+0x94/0xc0 [ 37.734816] ksys_ioctl+0xa9/0xd0 [ 37.738252] __x64_sys_ioctl+0x73/0xb0 [ 37.742123] do_syscall_64+0x1b9/0x820 [ 37.746013] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.751362] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.756271] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.761101] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.766098] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.771111] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.776110] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.780939] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.786123] RIP: 0033:0x440009 [ 37.789302] 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 [ 37.808186] RSP: 002b:00007ffde77cac38 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 37.815877] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 37.823129] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 37.830380] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 37.837643] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 37.844910] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 37.852165] Modules linked in: [ 37.855497] ---[ end trace d9ef371099564667 ]--- [ 37.860425] RIP: 0010:rb_erase+0x306/0x3710 [ 37.864752] 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 [ 37.883678] RSP: 0018:ffff8801b76d6918 EFLAGS: 00010202 [ 37.889078] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 37.896341] RDX: 1ffff10036edad2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 37.903626] RBP: ffff8801b76d7320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 37.910927] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801c2c01530 [ 37.918221] R13: dffffc0000000000 R14: ffff8801b76d72f8 R15: ffff8801b76d7438 [ 37.925492] FS: 0000000000b5b880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 37.933756] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.939658] CR2: 0000000020000080 CR3: 00000001d8a0e000 CR4: 00000000001406e0 [ 37.946916] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.954205] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.961491] Kernel panic - not syncing: Fatal exception [ 37.967754] Kernel Offset: disabled [ 37.971381] Rebooting in 86400 seconds..