[ 24.043765] audit: type=1800 audit(1540287185.588:21): pid=5196 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [ 24.079640] audit: type=1800 audit(1540287185.598:22): pid=5196 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. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [ 25.135800] sshd (5264) used greatest stack depth: 15496 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.116' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 65.421161] kasan: CONFIG_KASAN_INLINE enabled [ 65.425892] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 65.433250] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 65.439465] CPU: 0 PID: 5352 Comm: syz-executor756 Not tainted 4.19.0-rc8+ #272 [ 65.446891] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.456234] RIP: 0010:rb_erase+0x306/0x3710 [ 65.460539] 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 [ 65.479432] RSP: 0018:ffff8801bf48e918 EFLAGS: 00010202 [ 65.484779] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 65.492028] RDX: 1ffff10037e91d2b RSI: ffffffff8afc5060 RDI: 0000000000000008 [ 65.499277] RBP: ffff8801bf48f320 R08: dffffc0000000000 R09: fffffbfff12d6968 [ 65.506533] R10: fffffbfff12d6968 R11: ffffffff896b4b43 R12: ffff8801b7727970 [ 65.513786] R13: dffffc0000000000 R14: ffff8801bf48f2f8 R15: ffff8801bf48f438 [ 65.521040] FS: 0000000002583880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 65.529315] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 65.535194] CR2: 0000000020000080 CR3: 00000001d8c2d000 CR4: 00000000001406f0 [ 65.542459] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.549908] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.557271] Call Trace: [ 65.559853] ? lockdep_on+0x50/0x50 [ 65.563469] ? rb_insert_color+0x1460/0x1460 [ 65.567864] ? lock_downgrade+0x900/0x900 [ 65.571993] ? noop_count+0x40/0x40 [ 65.575609] ? lock_pin_lock+0x350/0x350 [ 65.579658] ? rcu_bh_qs+0xc0/0xc0 [ 65.583180] ? unwind_dump+0x190/0x190 [ 65.587055] ? kasan_check_read+0x11/0x20 [ 65.591233] ? noop_count+0x40/0x40 [ 65.594853] ? lock_pin_lock+0x350/0x350 [ 65.598939] ? mark_held_locks+0x130/0x130 [ 65.603161] ? check_usage_forwards+0x3e0/0x3e0 [ 65.607812] ? __bfs+0x385/0x7a0 [ 65.611160] ? check_usage+0x1a9/0x790 [ 65.615033] ? lock_pin_lock+0x350/0x350 [ 65.619079] ? check_usage_forwards+0x3e0/0x3e0 [ 65.623731] ? __bfs+0x385/0x7a0 [ 65.627087] ? modules_open+0xa0/0xa0 [ 65.630874] ? lockdep_on+0x50/0x50 [ 65.634528] ? lock_pin_lock+0x350/0x350 [ 65.638586] ? mark_held_locks+0x130/0x130 [ 65.642806] ? kasan_check_read+0x11/0x20 [ 65.647023] ? __lock_acquire+0x2881/0x4ec0 [ 65.651338] ? mark_held_locks+0x130/0x130 [ 65.655560] ? print_usage_bug+0xc0/0xc0 [ 65.659610] ? _raw_spin_unlock+0x2c/0x50 [ 65.663754] ? graph_lock+0x170/0x170 [ 65.667623] ? ext4_exit_mballoc+0xc0/0xc0 [ 65.671852] ? __lock_acquire+0x7ec/0x4ec0 [ 65.676075] ? find_held_lock+0x36/0x1c0 [ 65.680122] ? mark_held_locks+0x130/0x130 [ 65.684338] ? lock_downgrade+0x900/0x900 [ 65.688467] ? ext4_es_scan+0x960/0x960 [ 65.692430] ? lock_release+0x970/0x970 [ 65.696390] ? do_raw_write_trylock+0x1c0/0x1c0 [ 65.701040] ? kasan_check_write+0x14/0x20 [ 65.705255] ? lock_acquire+0x1ed/0x520 [ 65.709209] ? integrity_inode_free+0x77/0x320 [ 65.713778] ? ext4_es_remove_extent+0x151/0x500 [ 65.718561] ? lock_release+0x970/0x970 [ 65.722529] ? kasan_check_write+0x14/0x20 [ 65.726755] ? do_raw_write_lock+0xbd/0x1e0 [ 65.731067] integrity_inode_free+0x12f/0x320 [ 65.735548] security_inode_free+0x19/0x90 [ 65.739766] __destroy_inode+0x328/0x820 [ 65.743809] ? generic_update_time+0x450/0x450 [ 65.748374] ? evict+0x5d8/0x980 [ 65.751720] ? lock_downgrade+0x900/0x900 [ 65.755856] ? __inode_wait_for_writeback+0x2cf/0x380 [ 65.761075] destroy_inode+0xda/0x200 [ 65.764864] ? __destroy_inode+0x820/0x820 [ 65.769082] ? kasan_check_write+0x14/0x20 [ 65.773300] ? do_raw_spin_lock+0xc1/0x230 [ 65.777521] evict+0x5e0/0x980 [ 65.780699] ? destroy_inode+0x200/0x200 [ 65.784750] ? iput+0x671/0xa90 [ 65.788016] ? lock_downgrade+0x900/0x900 [ 65.792150] ? kasan_check_read+0x11/0x20 [ 65.796282] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 65.800845] ? lock_downgrade+0x900/0x900 [ 65.804977] iput+0x679/0xa90 [ 65.808064] ? inode_add_lru+0x2a0/0x2a0 [ 65.812114] ? up_write+0x7b/0x220 [ 65.815641] ? up_read+0x110/0x110 [ 65.819160] ? up_read+0x110/0x110 [ 65.822681] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 65.828214] ? check_preemption_disabled+0x48/0x280 [ 65.833219] ext4_ioctl+0x236f/0x4210 [ 65.837009] ? is_bpf_text_address+0xac/0x170 [ 65.841531] ? ext4_ioctl_group_add+0x560/0x560 [ 65.846195] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 65.851976] ? kasan_check_read+0x11/0x20 [ 65.856108] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 65.861397] ? rcu_bh_qs+0xc0/0xc0 [ 65.864926] ? rcu_bh_qs+0xc0/0xc0 [ 65.868459] ? unwind_dump+0x190/0x190 [ 65.872334] ? is_bpf_text_address+0xd3/0x170 [ 65.876814] ? kernel_text_address+0x79/0xf0 [ 65.881248] ? __kernel_text_address+0xd/0x40 [ 65.885860] ? unwind_get_return_address+0x61/0xa0 [ 65.890780] ? __save_stack_trace+0x8d/0xf0 [ 65.895088] ? save_stack+0xa9/0xd0 [ 65.898711] ? save_stack+0x43/0xd0 [ 65.902405] ? __kasan_slab_free+0x102/0x150 [ 65.906811] ? kasan_slab_free+0xe/0x10 [ 65.910771] ? kmem_cache_free+0x83/0x290 [ 65.914897] ? putname+0xf2/0x130 [ 65.918334] ? do_sys_open+0x54d/0x700 [ 65.922267] ? __x64_sys_openat+0x9d/0x100 [ 65.926533] ? do_syscall_64+0x1b9/0x820 [ 65.930582] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.935930] ? trace_hardirqs_off+0xb8/0x310 [ 65.940327] ? kasan_check_read+0x11/0x20 [ 65.944459] ? do_raw_spin_unlock+0xa7/0x330 [ 65.948852] ? trace_hardirqs_on+0x310/0x310 [ 65.953243] ? kasan_check_write+0x14/0x20 [ 65.957463] ? trace_hardirqs_off+0xb8/0x310 [ 65.961854] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 65.967381] ? check_preemption_disabled+0x48/0x280 [ 65.972377] ? check_preemption_disabled+0x48/0x280 [ 65.977450] ? ext4_ioctl_group_add+0x560/0x560 [ 65.982111] do_vfs_ioctl+0x1de/0x1720 [ 65.985982] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 65.991241] ? ioctl_preallocate+0x300/0x300 [ 65.995632] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.001151] ? __fget_light+0x2e9/0x430 [ 66.005116] ? fget_raw+0x20/0x20 [ 66.008560] ? putname+0xf2/0x130 [ 66.011993] ? rcu_read_lock_sched_held+0x108/0x120 [ 66.017034] ? kmem_cache_free+0x24f/0x290 [ 66.021257] ? putname+0xf7/0x130 [ 66.024692] ? do_syscall_64+0x9a/0x820 [ 66.028651] ? do_syscall_64+0x9a/0x820 [ 66.032606] ? lockdep_hardirqs_on+0x421/0x5c0 [ 66.037310] ? security_file_ioctl+0x94/0xc0 [ 66.041706] ksys_ioctl+0xa9/0xd0 [ 66.045151] __x64_sys_ioctl+0x73/0xb0 [ 66.049027] do_syscall_64+0x1b9/0x820 [ 66.052896] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 66.058240] ? syscall_return_slowpath+0x5e0/0x5e0 [ 66.063159] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 66.067995] ? trace_hardirqs_on_caller+0x310/0x310 [ 66.072998] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 66.077997] ? prepare_exit_to_usermode+0x291/0x3b0 [ 66.083003] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 66.087838] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 66.093116] RIP: 0033:0x440009 [ 66.096296] 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 [ 66.115186] RSP: 002b:00007ffefd80ee58 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 66.122920] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 66.130168] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 66.137429] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 66.144684] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 66.152043] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 66.159299] Modules linked in: [ 66.162640] ---[ end trace 67b5a61a0411b250 ]--- [ 66.167457] RIP: 0010:rb_erase+0x306/0x3710 [ 66.171780] 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 [ 66.190698] RSP: 0018:ffff8801bf48e918 EFLAGS: 00010202 [ 66.196077] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 66.203332] RDX: 1ffff10037e91d2b RSI: ffffffff8afc5060 RDI: 0000000000000008 [ 66.210618] RBP: ffff8801bf48f320 R08: dffffc0000000000 R09: fffffbfff12d6968 [ 66.217900] R10: fffffbfff12d6968 R11: ffffffff896b4b43 R12: ffff8801b7727970 [ 66.225196] R13: dffffc0000000000 R14: ffff8801bf48f2f8 R15: ffff8801bf48f438 [ 66.232467] FS: 0000000002583880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 66.240725] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.246621] CR2: 0000000020000080 CR3: 00000001d8c2d000 CR4: 00000000001406f0 [ 66.253881] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.261211] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.268498] Kernel panic - not syncing: Fatal exception [ 66.274666] Kernel Offset: disabled [ 66.278294] Rebooting in 86400 seconds..