[ 24.476202] audit: type=1800 audit(1540261214.496:21): pid=5169 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [ 24.503495] audit: type=1800 audit(1540261214.496:22): pid=5169 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 25.123880] cat (5234) used greatest stack depth: 15688 bytes left [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.118' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.482635] kasan: CONFIG_KASAN_INLINE enabled [ 37.487378] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 37.494737] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 37.500961] CPU: 1 PID: 5324 Comm: syz-executor428 Not tainted 4.19.0-rc8+ #152 [ 37.508392] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.517743] RIP: 0010:rb_erase+0x306/0x3710 [ 37.522058] 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 [ 37.540961] RSP: 0018:ffff8801d8f26918 EFLAGS: 00010202 [ 37.546356] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 37.553748] RDX: 1ffff1003b1e4d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 37.561008] RBP: ffff8801d8f27320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 37.568335] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b6f1e970 [ 37.575668] R13: dffffc0000000000 R14: ffff8801d8f272f8 R15: ffff8801d8f27438 [ 37.582931] FS: 0000000002412880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 37.591148] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.597010] CR2: 0000000020000080 CR3: 00000001bbaf4000 CR4: 00000000001406e0 [ 37.604266] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.611519] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.618828] Call Trace: [ 37.621412] ? lockdep_on+0x50/0x50 [ 37.625026] ? rb_insert_color+0x1460/0x1460 [ 37.629427] ? lock_downgrade+0x900/0x900 [ 37.633562] ? noop_count+0x40/0x40 [ 37.637179] ? lock_pin_lock+0x350/0x350 [ 37.641231] ? rcu_bh_qs+0xc0/0xc0 [ 37.644806] ? unwind_dump+0x190/0x190 [ 37.648693] ? kasan_check_read+0x11/0x20 [ 37.652829] ? noop_count+0x40/0x40 [ 37.656443] ? lock_pin_lock+0x350/0x350 [ 37.660489] ? mark_held_locks+0x130/0x130 [ 37.664709] ? check_usage_forwards+0x3e0/0x3e0 [ 37.669363] ? __bfs+0x385/0x7a0 [ 37.672720] ? check_usage+0x1a9/0x790 [ 37.676591] ? lock_pin_lock+0x350/0x350 [ 37.680635] ? check_usage_forwards+0x3e0/0x3e0 [ 37.685291] ? __bfs+0x385/0x7a0 [ 37.688646] ? modules_open+0xa0/0xa0 [ 37.692430] ? lockdep_on+0x50/0x50 [ 37.696046] ? lock_pin_lock+0x350/0x350 [ 37.700096] ? mark_held_locks+0x130/0x130 [ 37.704324] ? kasan_check_read+0x11/0x20 [ 37.708458] ? __lock_acquire+0x2881/0x4ec0 [ 37.712765] ? mark_held_locks+0x130/0x130 [ 37.716987] ? print_usage_bug+0xc0/0xc0 [ 37.721040] ? _raw_spin_unlock+0x2c/0x50 [ 37.725177] ? graph_lock+0x170/0x170 [ 37.728974] ? ext4_exit_mballoc+0xc0/0xc0 [ 37.733202] ? __lock_acquire+0x7ec/0x4ec0 [ 37.737488] ? find_held_lock+0x36/0x1c0 [ 37.741613] ? mark_held_locks+0x130/0x130 [ 37.745853] ? lock_downgrade+0x900/0x900 [ 37.750001] ? ext4_es_scan+0x960/0x960 [ 37.753972] ? lock_release+0x970/0x970 [ 37.757950] ? do_raw_write_trylock+0x1c0/0x1c0 [ 37.762682] ? kasan_check_write+0x14/0x20 [ 37.766910] ? lock_acquire+0x1ed/0x520 [ 37.770872] ? integrity_inode_free+0x77/0x320 [ 37.775445] ? ext4_es_remove_extent+0x151/0x500 [ 37.780187] ? lock_release+0x970/0x970 [ 37.784148] ? kasan_check_write+0x14/0x20 [ 37.788377] ? do_raw_write_lock+0xbd/0x1e0 [ 37.792693] integrity_inode_free+0x12f/0x320 [ 37.797176] security_inode_free+0x19/0x90 [ 37.801402] __destroy_inode+0x328/0x820 [ 37.805456] ? generic_update_time+0x450/0x450 [ 37.810023] ? evict+0x5d8/0x980 [ 37.813493] ? lock_downgrade+0x900/0x900 [ 37.817632] ? __inode_wait_for_writeback+0x2cf/0x380 [ 37.822810] destroy_inode+0xda/0x200 [ 37.826594] ? __destroy_inode+0x820/0x820 [ 37.830818] ? kasan_check_write+0x14/0x20 [ 37.835038] ? do_raw_spin_lock+0xc1/0x230 [ 37.839262] evict+0x5e0/0x980 [ 37.842441] ? destroy_inode+0x200/0x200 [ 37.846489] ? iput+0x671/0xa90 [ 37.849752] ? lock_downgrade+0x900/0x900 [ 37.853884] ? kasan_check_read+0x11/0x20 [ 37.858015] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 37.862579] ? lock_downgrade+0x900/0x900 [ 37.866790] iput+0x679/0xa90 [ 37.869895] ? inode_add_lru+0x2a0/0x2a0 [ 37.874105] ? up_write+0x7b/0x220 [ 37.877644] ? up_read+0x110/0x110 [ 37.881170] ? up_read+0x110/0x110 [ 37.884699] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.890226] ? check_preemption_disabled+0x48/0x280 [ 37.895235] ext4_ioctl+0x236f/0x4210 [ 37.899026] ? is_bpf_text_address+0xac/0x170 [ 37.903505] ? ext4_ioctl_group_add+0x560/0x560 [ 37.908162] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 37.913952] ? kasan_check_read+0x11/0x20 [ 37.918084] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 37.923419] ? rcu_bh_qs+0xc0/0xc0 [ 37.926957] ? rcu_bh_qs+0xc0/0xc0 [ 37.930479] ? unwind_dump+0x190/0x190 [ 37.934355] ? is_bpf_text_address+0xd3/0x170 [ 37.938837] ? kernel_text_address+0x79/0xf0 [ 37.943230] ? __kernel_text_address+0xd/0x40 [ 37.947708] ? unwind_get_return_address+0x61/0xa0 [ 37.952623] ? __save_stack_trace+0x8d/0xf0 [ 37.956931] ? save_stack+0xa9/0xd0 [ 37.960545] ? save_stack+0x43/0xd0 [ 37.964152] ? __kasan_slab_free+0x102/0x150 [ 37.968543] ? kasan_slab_free+0xe/0x10 [ 37.972553] ? kmem_cache_free+0x83/0x290 [ 37.976831] ? putname+0xf2/0x130 [ 37.980273] ? do_sys_open+0x54d/0x700 [ 37.984143] ? __x64_sys_openat+0x9d/0x100 [ 37.988422] ? do_syscall_64+0x1b9/0x820 [ 37.992552] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.997913] ? trace_hardirqs_off+0xb8/0x310 [ 38.002316] ? kasan_check_read+0x11/0x20 [ 38.006451] ? do_raw_spin_unlock+0xa7/0x330 [ 38.010855] ? trace_hardirqs_on+0x310/0x310 [ 38.015251] ? kasan_check_write+0x14/0x20 [ 38.019476] ? trace_hardirqs_off+0xb8/0x310 [ 38.023873] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.029488] ? check_preemption_disabled+0x48/0x280 [ 38.034495] ? check_preemption_disabled+0x48/0x280 [ 38.039499] ? ext4_ioctl_group_add+0x560/0x560 [ 38.044157] do_vfs_ioctl+0x1de/0x1720 [ 38.048111] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 38.053387] ? ioctl_preallocate+0x300/0x300 [ 38.057849] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.063376] ? __fget_light+0x2e9/0x430 [ 38.067339] ? fget_raw+0x20/0x20 [ 38.070774] ? putname+0xf2/0x130 [ 38.074218] ? rcu_read_lock_sched_held+0x108/0x120 [ 38.079224] ? kmem_cache_free+0x24f/0x290 [ 38.083444] ? putname+0xf7/0x130 [ 38.086886] ? do_syscall_64+0x9a/0x820 [ 38.090843] ? do_syscall_64+0x9a/0x820 [ 38.094801] ? lockdep_hardirqs_on+0x421/0x5c0 [ 38.099378] ? security_file_ioctl+0x94/0xc0 [ 38.103773] ksys_ioctl+0xa9/0xd0 [ 38.107213] __x64_sys_ioctl+0x73/0xb0 [ 38.111095] do_syscall_64+0x1b9/0x820 [ 38.114972] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 38.120322] ? syscall_return_slowpath+0x5e0/0x5e0 [ 38.125232] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.130065] ? trace_hardirqs_on_caller+0x310/0x310 [ 38.135069] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 38.140070] ? prepare_exit_to_usermode+0x291/0x3b0 [ 38.145069] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.149961] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.155143] RIP: 0033:0x440009 [ 38.158322] 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 [ 38.177214] RSP: 002b:00007ffd5f2edff8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 38.184908] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 38.192165] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 38.199420] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 38.206678] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 38.213984] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 38.221254] Modules linked in: [ 38.224539] ---[ end trace 137ce013ef220220 ]--- [ 38.229350] RIP: 0010:rb_erase+0x306/0x3710 [ 38.233675] 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 [ 38.252681] RSP: 0018:ffff8801d8f26918 EFLAGS: 00010202 [ 38.258093] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 38.265358] RDX: 1ffff1003b1e4d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 38.272858] RBP: ffff8801d8f27320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 38.280268] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b6f1e970 [ 38.287589] R13: dffffc0000000000 R14: ffff8801d8f272f8 R15: ffff8801d8f27438 [ 38.294855] FS: 0000000002412880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 38.303241] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.309165] CR2: 0000000020000080 CR3: 00000001bbaf4000 CR4: 00000000001406e0 [ 38.316473] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.323742] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.331060] Kernel panic - not syncing: Fatal exception [ 38.337325] Kernel Offset: disabled [ 38.340955] Rebooting in 86400 seconds..