[ 24.683688] audit: type=1800 audit(1537947309.506:21): pid=5413 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [ 24.710269] audit: type=1800 audit(1537947309.516:22): pid=5413 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[ 25.180949] rsyslogd (5436) used greatest stack depth: 15448 bytes left [?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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.66' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.003255] kasan: CONFIG_KASAN_INLINE enabled [ 37.008097] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 37.015506] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 37.021746] CPU: 0 PID: 5568 Comm: syz-executor026 Not tainted 4.19.0-rc5-next-20180925+ #80 [ 37.030305] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.039668] RIP: 0010:rb_erase+0x306/0x3710 [ 37.044024] 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 [ 37.062916] RSP: 0018:ffff8801baac6918 EFLAGS: 00010202 [ 37.068286] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 37.075540] RDX: 1ffff10037558d2b RSI: ffffffff8b5a4340 RDI: 0000000000000008 [ 37.082901] RBP: ffff8801baac7320 R08: dffffc0000000000 R09: fffffbfff135d930 [ 37.090157] R10: fffffbfff135d930 R11: ffffffff89aec983 R12: ffff8801b6fa2970 [ 37.097410] R13: dffffc0000000000 R14: ffff8801baac72f8 R15: ffff8801baac7438 [ 37.104669] FS: 0000000000a55880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 37.112982] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.118844] CR2: 0000000020000080 CR3: 00000001d81b6000 CR4: 00000000001406f0 [ 37.126099] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.133362] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.140616] Call Trace: [ 37.143189] ? lockdep_on+0x50/0x50 [ 37.146803] ? rb_insert_color+0x1460/0x1460 [ 37.151195] ? noop_count+0x40/0x40 [ 37.154890] ? lock_pin_lock+0x350/0x350 [ 37.158944] ? noop_count+0x40/0x40 [ 37.162555] ? kasan_check_read+0x11/0x20 [ 37.166684] ? noop_count+0x40/0x40 [ 37.170304] ? noop_count+0x40/0x40 [ 37.173977] ? lock_pin_lock+0x350/0x350 [ 37.178029] ? mark_held_locks+0x130/0x130 [ 37.182247] ? check_usage_forwards+0x3e0/0x3e0 [ 37.186905] ? __bfs+0x385/0x7a0 [ 37.190259] ? noop_count+0x40/0x40 [ 37.193874] ? check_usage+0x1a9/0x790 [ 37.197744] ? lock_pin_lock+0x350/0x350 [ 37.201796] ? check_usage_forwards+0x3e0/0x3e0 [ 37.206451] ? __bfs+0x385/0x7a0 [ 37.209826] ? __lock_acquire+0x7ec/0x4ec0 [ 37.214046] ? lockdep_on+0x50/0x50 [ 37.217698] ? lock_pin_lock+0x350/0x350 [ 37.221752] ? mark_held_locks+0x130/0x130 [ 37.226046] ? kasan_check_read+0x11/0x20 [ 37.230184] ? __lock_acquire+0x2881/0x4ec0 [ 37.234490] ? mark_held_locks+0x130/0x130 [ 37.238712] ? print_usage_bug+0xc0/0xc0 [ 37.242941] ? _raw_spin_unlock+0x2c/0x50 [ 37.247082] ? graph_lock+0x170/0x170 [ 37.250876] ? ext4_exit_mballoc+0xc0/0xc0 [ 37.255098] ? __lock_acquire+0x7ec/0x4ec0 [ 37.259319] ? find_held_lock+0x36/0x1c0 [ 37.263366] ? mark_held_locks+0x130/0x130 [ 37.267583] ? lock_downgrade+0x900/0x900 [ 37.271715] ? ext4_es_scan+0x950/0x950 [ 37.275672] ? lock_release+0x970/0x970 [ 37.279631] ? do_raw_write_trylock+0x1c0/0x1c0 [ 37.284284] ? kasan_check_write+0x14/0x20 [ 37.288505] ? lock_acquire+0x1ed/0x520 [ 37.292461] ? integrity_inode_free+0x77/0x320 [ 37.297026] ? ext4_es_remove_extent+0x14c/0x4f0 [ 37.301770] ? lock_release+0x970/0x970 [ 37.305750] ? kasan_check_write+0x14/0x20 [ 37.309974] ? do_raw_write_lock+0xbd/0x1b0 [ 37.314286] integrity_inode_free+0x12f/0x320 [ 37.318773] security_inode_free+0x19/0x90 [ 37.323007] __destroy_inode+0x328/0x820 [ 37.327057] ? generic_update_time+0x450/0x450 [ 37.331620] ? evict+0x5d8/0x980 [ 37.334970] ? lock_downgrade+0x900/0x900 [ 37.339102] ? __inode_wait_for_writeback+0x2cf/0x380 [ 37.344287] destroy_inode+0xda/0x200 [ 37.348079] ? __destroy_inode+0x820/0x820 [ 37.352306] ? kasan_check_write+0x14/0x20 [ 37.356534] ? do_raw_spin_lock+0xc1/0x200 [ 37.360760] evict+0x5e0/0x980 [ 37.364056] ? destroy_inode+0x200/0x200 [ 37.368202] ? iput+0x66c/0xa90 [ 37.371467] ? lock_downgrade+0x900/0x900 [ 37.375602] ? kasan_check_read+0x11/0x20 [ 37.379734] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 37.384297] ? lock_downgrade+0x900/0x900 [ 37.388431] iput+0x674/0xa90 [ 37.391521] ? inode_add_lru+0x2a0/0x2a0 [ 37.395569] ? up_write+0x7b/0x220 [ 37.399092] ? down_write_nested+0x130/0x130 [ 37.403482] ? down_write_nested+0x130/0x130 [ 37.407875] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.413396] ? check_preemption_disabled+0x48/0x200 [ 37.418396] ext4_ioctl+0x236a/0x4210 [ 37.422180] ? is_bpf_text_address+0xac/0x170 [ 37.426657] ? ext4_ioctl_group_add+0x560/0x560 [ 37.431313] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 37.436226] ? kasan_check_read+0x11/0x20 [ 37.440360] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 37.445621] ? rcu_softirq_qs+0x20/0x20 [ 37.449647] ? rcu_softirq_qs+0x20/0x20 [ 37.453610] ? unwind_dump+0x190/0x190 [ 37.457483] ? is_bpf_text_address+0xd3/0x170 [ 37.461960] ? kernel_text_address+0x79/0xf0 [ 37.466404] ? __kernel_text_address+0xd/0x40 [ 37.470889] ? unwind_get_return_address+0x61/0xa0 [ 37.475816] ? __save_stack_trace+0x8d/0xf0 [ 37.480124] ? save_stack+0xa9/0xd0 [ 37.483738] ? save_stack+0x43/0xd0 [ 37.487350] ? __kasan_slab_free+0x102/0x150 [ 37.491818] ? kasan_slab_free+0xe/0x10 [ 37.495801] ? kmem_cache_free+0x83/0x290 [ 37.499931] ? putname+0xf2/0x130 [ 37.503418] ? do_sys_open+0x54d/0x700 [ 37.507298] ? __x64_sys_openat+0x9d/0x100 [ 37.511521] ? do_syscall_64+0x1b9/0x820 [ 37.515620] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.520992] ? trace_hardirqs_off+0xb8/0x310 [ 37.525388] ? kasan_check_read+0x11/0x20 [ 37.529525] ? do_raw_spin_unlock+0xa7/0x2f0 [ 37.533926] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.538938] ? kasan_check_write+0x14/0x20 [ 37.543163] ? trace_hardirqs_off+0xb8/0x310 [ 37.547561] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.553087] ? ext4_ioctl_group_add+0x560/0x560 [ 37.557740] do_vfs_ioctl+0x1de/0x1720 [ 37.561612] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 37.567130] ? ioctl_preallocate+0x300/0x300 [ 37.571525] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.577051] ? __fget_light+0x2e9/0x430 [ 37.581005] ? fget_raw+0x20/0x20 [ 37.584439] ? putname+0xf2/0x130 [ 37.587878] ? rcu_read_lock_sched_held+0x108/0x120 [ 37.592876] ? kmem_cache_free+0x24f/0x290 [ 37.597096] ? putname+0xf7/0x130 [ 37.600531] ? do_syscall_64+0x9a/0x820 [ 37.604484] ? do_syscall_64+0x9a/0x820 [ 37.608445] ? lockdep_hardirqs_on+0x421/0x5c0 [ 37.613018] ? security_file_ioctl+0x94/0xc0 [ 37.617414] ksys_ioctl+0xa9/0xd0 [ 37.620855] __x64_sys_ioctl+0x73/0xb0 [ 37.624723] do_syscall_64+0x1b9/0x820 [ 37.628592] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.633938] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.638855] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.643688] ? trace_hardirqs_off+0x310/0x310 [ 37.648173] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.653248] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.658258] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.663087] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.668256] RIP: 0033:0x440009 [ 37.671430] 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 [ 37.690314] RSP: 002b:00007fffa05fde18 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 37.698041] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 37.705296] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 37.712547] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 37.719839] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 37.727111] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 37.734432] Modules linked in: [ 37.737720] ---[ end trace d8d879aaf0a77df7 ]--- [ 37.742488] RIP: 0010:rb_erase+0x306/0x3710 [ 37.746846] 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 [ 37.765810] RSP: 0018:ffff8801baac6918 EFLAGS: 00010202 [ 37.771190] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 37.778590] RDX: 1ffff10037558d2b RSI: ffffffff8b5a4340 RDI: 0000000000000008 [ 37.785885] RBP: ffff8801baac7320 R08: dffffc0000000000 R09: fffffbfff135d930 [ 37.793142] R10: fffffbfff135d930 R11: ffffffff89aec983 R12: ffff8801b6fa2970 [ 37.800449] R13: dffffc0000000000 R14: ffff8801baac72f8 R15: ffff8801baac7438 [ 37.807742] FS: 0000000000a55880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 37.815986] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.821875] CR2: 0000000020000080 CR3: 00000001d81b6000 CR4: 00000000001406f0 [ 37.829186] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.836474] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.843729] Kernel panic - not syncing: Fatal exception [ 37.850076] Kernel Offset: disabled [ 37.853698] Rebooting in 86400 seconds..