[....] 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. [ 27.095250] kauditd_printk_skb: 7 callbacks suppressed [ 27.095263] audit: type=1800 audit(1539511574.217:29): pid=5220 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 [ 27.123990] audit: type=1800 audit(1539511574.227:30): pid=5220 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 '10.128.0.40' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 35.755356] kasan: CONFIG_KASAN_INLINE enabled [ 35.760075] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.767425] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.773638] CPU: 0 PID: 5375 Comm: syz-executor170 Not tainted 4.19.0-rc7+ #283 [ 35.781065] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.790424] RIP: 0010:rb_erase+0x306/0x3710 [ 35.794730] 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 [ 35.813615] RSP: 0018:ffff8801bacde918 EFLAGS: 00010202 [ 35.818959] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 35.826210] RDX: 1ffff1003759bd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 35.833462] RBP: ffff8801bacdf320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 35.840766] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801c4419270 [ 35.848221] R13: dffffc0000000000 R14: ffff8801bacdf2f8 R15: ffff8801bacdf438 [ 35.855475] FS: 0000000001a98880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 35.863682] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.869543] CR2: 0000000020000080 CR3: 00000001d86ad000 CR4: 00000000001406f0 [ 35.876797] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.884079] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.891346] Call Trace: [ 35.893920] ? lockdep_on+0x50/0x50 [ 35.897533] ? rb_insert_color+0x1460/0x1460 [ 35.901925] ? noop_count+0x40/0x40 [ 35.905533] ? lock_pin_lock+0x350/0x350 [ 35.909577] ? noop_count+0x40/0x40 [ 35.913188] ? kasan_check_read+0x11/0x20 [ 35.917316] ? noop_count+0x40/0x40 [ 35.920989] ? noop_count+0x40/0x40 [ 35.924604] ? lock_pin_lock+0x350/0x350 [ 35.928650] ? mark_held_locks+0x130/0x130 [ 35.932881] ? check_usage_forwards+0x3e0/0x3e0 [ 35.937531] ? __bfs+0x385/0x7a0 [ 35.940881] ? noop_count+0x40/0x40 [ 35.944491] ? check_usage+0x1a9/0x790 [ 35.948391] ? lock_pin_lock+0x350/0x350 [ 35.952443] ? check_usage_forwards+0x3e0/0x3e0 [ 35.957094] ? __bfs+0x385/0x7a0 [ 35.960443] ? __lock_acquire+0x7ec/0x4ec0 [ 35.964661] ? lockdep_on+0x50/0x50 [ 35.968271] ? lock_pin_lock+0x350/0x350 [ 35.972322] ? mark_held_locks+0x130/0x130 [ 35.976544] ? kasan_check_read+0x11/0x20 [ 35.980675] ? __lock_acquire+0x2881/0x4ec0 [ 35.984982] ? mark_held_locks+0x130/0x130 [ 35.989217] ? print_usage_bug+0xc0/0xc0 [ 35.993277] ? _raw_spin_unlock+0x2c/0x50 [ 35.997408] ? graph_lock+0x170/0x170 [ 36.001197] ? ext4_exit_mballoc+0xc0/0xc0 [ 36.005462] ? __lock_acquire+0x7ec/0x4ec0 [ 36.009716] ? find_held_lock+0x36/0x1c0 [ 36.013788] ? mark_held_locks+0x130/0x130 [ 36.018010] ? lock_downgrade+0x900/0x900 [ 36.022158] ? ext4_es_scan+0x960/0x960 [ 36.026118] ? lock_release+0x970/0x970 [ 36.030082] ? do_raw_write_trylock+0x1c0/0x1c0 [ 36.034736] ? kasan_check_write+0x14/0x20 [ 36.038958] ? lock_acquire+0x1ed/0x520 [ 36.042934] ? integrity_inode_free+0x77/0x320 [ 36.047517] ? ext4_es_remove_extent+0x151/0x500 [ 36.052256] ? lock_release+0x970/0x970 [ 36.056219] ? kasan_check_write+0x14/0x20 [ 36.060438] ? do_raw_write_lock+0xbd/0x1b0 [ 36.064741] integrity_inode_free+0x12f/0x320 [ 36.069224] security_inode_free+0x19/0x90 [ 36.073457] __destroy_inode+0x328/0x820 [ 36.077502] ? generic_update_time+0x450/0x450 [ 36.082068] ? evict+0x5d8/0x980 [ 36.085417] ? lock_downgrade+0x900/0x900 [ 36.089548] ? __inode_wait_for_writeback+0x2cf/0x380 [ 36.094722] destroy_inode+0xda/0x200 [ 36.098522] ? __destroy_inode+0x820/0x820 [ 36.102738] ? kasan_check_write+0x14/0x20 [ 36.106953] ? do_raw_spin_lock+0xc1/0x200 [ 36.111172] evict+0x5e0/0x980 [ 36.114347] ? destroy_inode+0x200/0x200 [ 36.118403] ? iput+0x671/0xa90 [ 36.121693] ? lock_downgrade+0x900/0x900 [ 36.125827] ? kasan_check_read+0x11/0x20 [ 36.129967] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 36.134530] ? lock_downgrade+0x900/0x900 [ 36.138662] iput+0x679/0xa90 [ 36.141769] ? inode_add_lru+0x2a0/0x2a0 [ 36.145811] ? up_write+0x7b/0x220 [ 36.149355] ? up_read+0x110/0x110 [ 36.152889] ? up_read+0x110/0x110 [ 36.156411] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.161947] ? check_preemption_disabled+0x48/0x200 [ 36.166964] ext4_ioctl+0x236f/0x4210 [ 36.170751] ? is_bpf_text_address+0xac/0x170 [ 36.175231] ? ext4_ioctl_group_add+0x560/0x560 [ 36.179902] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 36.185685] ? kasan_check_read+0x11/0x20 [ 36.189863] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 36.195128] ? rcu_bh_qs+0xc0/0xc0 [ 36.198651] ? rcu_bh_qs+0xc0/0xc0 [ 36.202191] ? unwind_dump+0x190/0x190 [ 36.206062] ? is_bpf_text_address+0xd3/0x170 [ 36.210557] ? kernel_text_address+0x79/0xf0 [ 36.214954] ? __kernel_text_address+0xd/0x40 [ 36.219453] ? unwind_get_return_address+0x61/0xa0 [ 36.224371] ? __save_stack_trace+0x8d/0xf0 [ 36.228678] ? save_stack+0xa9/0xd0 [ 36.232316] ? save_stack+0x43/0xd0 [ 36.235946] ? __kasan_slab_free+0x102/0x150 [ 36.240339] ? kasan_slab_free+0xe/0x10 [ 36.244296] ? kmem_cache_free+0x83/0x290 [ 36.248425] ? putname+0xf2/0x130 [ 36.251871] ? do_sys_open+0x54d/0x700 [ 36.255736] ? __x64_sys_openat+0x9d/0x100 [ 36.259975] ? do_syscall_64+0x1b9/0x820 [ 36.264042] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.269390] ? trace_hardirqs_off+0xb8/0x310 [ 36.273777] ? kasan_check_read+0x11/0x20 [ 36.277910] ? do_raw_spin_unlock+0xa7/0x2f0 [ 36.282300] ? trace_hardirqs_on+0x310/0x310 [ 36.286690] ? kasan_check_write+0x14/0x20 [ 36.290906] ? trace_hardirqs_off+0xb8/0x310 [ 36.295295] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.300834] ? check_preemption_disabled+0x48/0x200 [ 36.305846] ? check_preemption_disabled+0x48/0x200 [ 36.310845] ? ext4_ioctl_group_add+0x560/0x560 [ 36.315510] do_vfs_ioctl+0x1de/0x1720 [ 36.319381] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 36.324639] ? ioctl_preallocate+0x300/0x300 [ 36.329047] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.334572] ? __fget_light+0x2e9/0x430 [ 36.338529] ? fget_raw+0x20/0x20 [ 36.341961] ? putname+0xf2/0x130 [ 36.345393] ? rcu_read_lock_sched_held+0x108/0x120 [ 36.350395] ? kmem_cache_free+0x24f/0x290 [ 36.354613] ? putname+0xf7/0x130 [ 36.358063] ? do_syscall_64+0x9a/0x820 [ 36.362027] ? do_syscall_64+0x9a/0x820 [ 36.365984] ? lockdep_hardirqs_on+0x421/0x5c0 [ 36.370557] ? security_file_ioctl+0x94/0xc0 [ 36.374946] ksys_ioctl+0xa9/0xd0 [ 36.378385] __x64_sys_ioctl+0x73/0xb0 [ 36.382295] do_syscall_64+0x1b9/0x820 [ 36.386197] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 36.391545] ? syscall_return_slowpath+0x5e0/0x5e0 [ 36.396454] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.401297] ? trace_hardirqs_on_caller+0x310/0x310 [ 36.406310] ? prepare_exit_to_usermode+0x291/0x3b0 [ 36.411327] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.416169] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.421344] RIP: 0033:0x440009 [ 36.424519] 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 [ 36.443401] RSP: 002b:00007ffddc2e5ce8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 36.451091] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 36.458347] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 36.465636] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 36.472902] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 36.480168] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 36.487424] Modules linked in: [ 36.490710] ---[ end trace b73a7deccc658b64 ]--- [ 36.495485] RIP: 0010:rb_erase+0x306/0x3710 [ 36.499880] 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 [ 36.518839] RSP: 0018:ffff8801bacde918 EFLAGS: 00010202 [ 36.524202] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 36.531576] RDX: 1ffff1003759bd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 36.538878] RBP: ffff8801bacdf320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 36.546145] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801c4419270 [ 36.553440] R13: dffffc0000000000 R14: ffff8801bacdf2f8 R15: ffff8801bacdf438 [ 36.560725] FS: 0000000001a98880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 36.568962] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.574848] CR2: 0000000020000080 CR3: 00000001d86ad000 CR4: 00000000001406f0 [ 36.582157] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.589441] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.596693] Kernel panic - not syncing: Fatal exception [ 36.602964] Kernel Offset: disabled [ 36.606595] Rebooting in 86400 seconds..