[ 23.855519] audit: type=1800 audit(1538594842.217:21): pid=5167 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [ 23.890986] audit: type=1800 audit(1538594842.227:22): pid=5167 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. [ 25.154692] sshd (5235) 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 '10.128.0.87' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 36.756712] kasan: CONFIG_KASAN_INLINE enabled [ 36.761429] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.768838] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.775077] CPU: 1 PID: 5323 Comm: syz-executor244 Not tainted 4.19.0-rc6+ #265 [ 36.782522] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.791918] RIP: 0010:rb_erase+0x306/0x3710 [ 36.796225] 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 [ 36.815120] RSP: 0018:ffff8801c9116918 EFLAGS: 00010202 [ 36.820473] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 36.827740] RDX: 1ffff10039222d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 36.835004] RBP: ffff8801c9117320 R08: dffffc0000000000 R09: fffffbfff12d6a48 [ 36.842254] R10: fffffbfff12d6a48 R11: ffffffff896b5243 R12: ffff8801b73901f0 [ 36.849505] R13: dffffc0000000000 R14: ffff8801c91172f8 R15: ffff8801c9117438 [ 36.856756] FS: 00000000011a7880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 36.864961] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.870824] CR2: 0000000020000080 CR3: 00000001bb5f8000 CR4: 00000000001406e0 [ 36.878077] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.885344] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.892608] Call Trace: [ 36.895184] ? lockdep_on+0x50/0x50 [ 36.898797] ? rb_insert_color+0x1460/0x1460 [ 36.903191] ? noop_count+0x40/0x40 [ 36.906797] ? lock_pin_lock+0x350/0x350 [ 36.910837] ? noop_count+0x40/0x40 [ 36.914445] ? kasan_check_read+0x11/0x20 [ 36.918572] ? noop_count+0x40/0x40 [ 36.922183] ? noop_count+0x40/0x40 [ 36.925794] ? lock_pin_lock+0x350/0x350 [ 36.929840] ? mark_held_locks+0x130/0x130 [ 36.934056] ? check_usage_forwards+0x3e0/0x3e0 [ 36.938707] ? __bfs+0x385/0x7a0 [ 36.942054] ? noop_count+0x40/0x40 [ 36.945661] ? check_usage+0x1a9/0x790 [ 36.949529] ? lock_pin_lock+0x350/0x350 [ 36.953574] ? check_usage_forwards+0x3e0/0x3e0 [ 36.958265] ? __bfs+0x385/0x7a0 [ 36.961615] ? __lock_acquire+0x7ec/0x4ec0 [ 36.965827] ? lockdep_on+0x50/0x50 [ 36.969438] ? lock_pin_lock+0x350/0x350 [ 36.973487] ? mark_held_locks+0x130/0x130 [ 36.977703] ? kasan_check_read+0x11/0x20 [ 36.981832] ? __lock_acquire+0x2881/0x4ec0 [ 36.986137] ? mark_held_locks+0x130/0x130 [ 36.990387] ? print_usage_bug+0xc0/0xc0 [ 36.994431] ? _raw_spin_unlock+0x2c/0x50 [ 36.998561] ? graph_lock+0x170/0x170 [ 37.002344] ? ext4_exit_mballoc+0xc0/0xc0 [ 37.006560] ? __lock_acquire+0x7ec/0x4ec0 [ 37.010778] ? find_held_lock+0x36/0x1c0 [ 37.014821] ? mark_held_locks+0x130/0x130 [ 37.019035] ? lock_downgrade+0x900/0x900 [ 37.023172] ? ext4_es_scan+0x960/0x960 [ 37.027131] ? do_raw_write_trylock+0x1c0/0x1c0 [ 37.031790] ? kasan_check_write+0x14/0x20 [ 37.036008] ? lock_acquire+0x1ed/0x520 [ 37.039963] ? integrity_inode_free+0x77/0x320 [ 37.044528] ? ext4_es_remove_extent+0x151/0x500 [ 37.049287] ? lock_release+0x970/0x970 [ 37.053248] ? kasan_check_write+0x14/0x20 [ 37.057473] ? do_raw_write_lock+0xbd/0x1b0 [ 37.061789] integrity_inode_free+0x12f/0x320 [ 37.067509] security_inode_free+0x19/0x90 [ 37.072018] __destroy_inode+0x328/0x820 [ 37.076064] ? generic_update_time+0x450/0x450 [ 37.080629] ? evict+0x5d8/0x980 [ 37.083979] ? lock_downgrade+0x900/0x900 [ 37.088135] ? __inode_wait_for_writeback+0x2cf/0x380 [ 37.093317] destroy_inode+0xda/0x200 [ 37.097096] ? __destroy_inode+0x820/0x820 [ 37.101314] ? kasan_check_write+0x14/0x20 [ 37.105531] ? do_raw_spin_lock+0xc1/0x200 [ 37.109750] evict+0x5e0/0x980 [ 37.112926] ? destroy_inode+0x200/0x200 [ 37.116965] ? iput+0x671/0xa90 [ 37.120228] ? lock_downgrade+0x900/0x900 [ 37.124358] ? kasan_check_read+0x11/0x20 [ 37.128516] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 37.133081] ? lock_downgrade+0x900/0x900 [ 37.137213] iput+0x679/0xa90 [ 37.140308] ? inode_add_lru+0x2a0/0x2a0 [ 37.144349] ? up_write+0x7b/0x220 [ 37.147872] ? up_read+0x110/0x110 [ 37.151392] ? up_read+0x110/0x110 [ 37.154915] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.160435] ? check_preemption_disabled+0x48/0x200 [ 37.165445] ext4_ioctl+0x236f/0x4210 [ 37.169234] ? is_bpf_text_address+0xac/0x170 [ 37.173713] ? ext4_ioctl_group_add+0x560/0x560 [ 37.178369] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 37.184173] ? kasan_check_read+0x11/0x20 [ 37.188330] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 37.193592] ? rcu_bh_qs+0xc0/0xc0 [ 37.197258] ? rcu_bh_qs+0xc0/0xc0 [ 37.200781] ? unwind_dump+0x190/0x190 [ 37.204655] ? is_bpf_text_address+0xd3/0x170 [ 37.209134] ? kernel_text_address+0x79/0xf0 [ 37.213533] ? __kernel_text_address+0xd/0x40 [ 37.218013] ? unwind_get_return_address+0x61/0xa0 [ 37.222938] ? __save_stack_trace+0x8d/0xf0 [ 37.227264] ? save_stack+0xa9/0xd0 [ 37.230878] ? save_stack+0x43/0xd0 [ 37.234490] ? __kasan_slab_free+0x102/0x150 [ 37.238903] ? kasan_slab_free+0xe/0x10 [ 37.242861] ? kmem_cache_free+0x83/0x290 [ 37.246991] ? putname+0xf2/0x130 [ 37.250426] ? do_sys_open+0x54d/0x700 [ 37.254293] ? __x64_sys_openat+0x9d/0x100 [ 37.258511] ? do_syscall_64+0x1b9/0x820 [ 37.262552] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.267903] ? trace_hardirqs_off+0xb8/0x310 [ 37.272320] ? kasan_check_read+0x11/0x20 [ 37.276457] ? do_raw_spin_unlock+0xa7/0x2f0 [ 37.280851] ? trace_hardirqs_on+0x310/0x310 [ 37.285246] ? kasan_check_write+0x14/0x20 [ 37.289464] ? trace_hardirqs_off+0xb8/0x310 [ 37.293857] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.299378] ? check_preemption_disabled+0x48/0x200 [ 37.304377] ? check_preemption_disabled+0x48/0x200 [ 37.309377] ? ext4_ioctl_group_add+0x560/0x560 [ 37.314031] do_vfs_ioctl+0x1de/0x1720 [ 37.317907] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 37.323172] ? ioctl_preallocate+0x300/0x300 [ 37.327575] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.333102] ? __fget_light+0x2e9/0x430 [ 37.337076] ? fget_raw+0x20/0x20 [ 37.340510] ? putname+0xf2/0x130 [ 37.343966] ? rcu_read_lock_sched_held+0x108/0x120 [ 37.348970] ? kmem_cache_free+0x24f/0x290 [ 37.353185] ? putname+0xf7/0x130 [ 37.356620] ? do_syscall_64+0x9a/0x820 [ 37.360575] ? do_syscall_64+0x9a/0x820 [ 37.364531] ? lockdep_hardirqs_on+0x421/0x5c0 [ 37.369098] ? security_file_ioctl+0x94/0xc0 [ 37.373487] ksys_ioctl+0xa9/0xd0 [ 37.376923] __x64_sys_ioctl+0x73/0xb0 [ 37.380793] do_syscall_64+0x1b9/0x820 [ 37.384666] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.390016] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.394955] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.399802] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.404801] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.409800] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.414803] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.419633] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.424801] RIP: 0033:0x4400d9 [ 37.427977] 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 [ 37.446865] RSP: 002b:00007ffd2f3e6df8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 37.454578] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400d9 [ 37.461831] RDX: 0000000020000040 RSI: 0000000000006611 RDI: 0000000000000003 [ 37.469081] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 37.476331] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401960 [ 37.483583] R13: 00000000004019f0 R14: 0000000000000000 R15: 0000000000000000 [ 37.490864] Modules linked in: [ 37.494401] ---[ end trace 7105981179129cf9 ]--- [ 37.499454] RIP: 0010:rb_erase+0x306/0x3710 [ 37.503761] 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 [ 37.522702] RSP: 0018:ffff8801c9116918 EFLAGS: 00010202 [ 37.528118] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 37.535378] RDX: 1ffff10039222d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 37.542672] RBP: ffff8801c9117320 R08: dffffc0000000000 R09: fffffbfff12d6a48 [ 37.549955] R10: fffffbfff12d6a48 R11: ffffffff896b5243 R12: ffff8801b73901f0 [ 37.557231] R13: dffffc0000000000 R14: ffff8801c91172f8 R15: ffff8801c9117438 [ 37.564528] FS: 00000000011a7880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 37.572787] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.578699] CR2: 0000000020000080 CR3: 00000001bb5f8000 CR4: 00000000001406e0 [ 37.586586] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.593872] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.601163] Kernel panic - not syncing: Fatal exception [ 37.607537] Kernel Offset: disabled [ 37.611164] Rebooting in 86400 seconds..