[ 37.466615] audit: type=1800 audit(1539219375.934:22): pid=5698 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [ 37.485022] audit: type=1800 audit(1539219375.934:23): pid=5698 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2442 res=0 [ 37.515204] audit: type=1800 audit(1539219375.934:24): pid=5698 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="sudo" dev="sda1" ino=2454 res=0 [....] 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.79' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 48.941171] kasan: CONFIG_KASAN_INLINE enabled [ 48.945781] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 48.953334] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 48.959571] CPU: 1 PID: 5852 Comm: syz-executor387 Not tainted 4.19.0-rc7+ #54 [ 48.966926] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.976279] RIP: 0010:rb_erase+0x306/0x3710 [ 48.980618] 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 [ 48.999508] RSP: 0018:ffff8801d32be918 EFLAGS: 00010202 [ 49.004862] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 49.012182] RDX: 1ffff1003a657d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 49.019442] RBP: ffff8801d32bf320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 49.026700] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8b3d1f0 [ 49.034010] R13: dffffc0000000000 R14: ffff8801d32bf2f8 R15: ffff8801d32bf438 [ 49.041282] FS: 0000000001e30880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 49.049492] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.055358] CR2: 0000000020000080 CR3: 00000001d3a12000 CR4: 00000000001406e0 [ 49.062615] Call Trace: [ 49.065197] ? rb_insert_color+0x1460/0x1460 [ 49.069603] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 49.074563] ? lock_downgrade+0x900/0x900 [ 49.078710] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 49.084593] ? mark_held_locks+0x130/0x130 [ 49.088818] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 49.094128] ? rcu_bh_qs+0xc0/0xc0 [ 49.097704] ? unwind_dump+0x190/0x190 [ 49.101593] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 49.107119] ? mark_held_locks+0x130/0x130 [ 49.111341] ? mark_page_accessed+0xcb0/0x2040 [ 49.115911] ? activate_page+0x1040/0x1040 [ 49.120136] ? activate_page+0x1040/0x1040 [ 49.124366] ? mark_held_locks+0x130/0x130 [ 49.128594] ? kasan_kmalloc+0xc7/0xe0 [ 49.132476] ? kmem_cache_alloc_trace+0x152/0x750 [ 49.137321] ? ima_add_digest_entry+0xcb/0x6a0 [ 49.141899] ? ima_add_template_entry+0x466/0x7f0 [ 49.146845] ? ima_store_template+0x224/0x310 [ 49.151353] ? pagecache_get_page+0x2d8/0xf00 [ 49.155946] ? find_get_pages_contig+0x15b0/0x15b0 [ 49.160873] ? is_bpf_text_address+0xac/0x170 [ 49.165362] ? lock_downgrade+0x900/0x900 [ 49.169499] ? mark_held_locks+0x130/0x130 [ 49.173729] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 49.179660] ? mark_held_locks+0x130/0x130 [ 49.183888] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 49.189238] ? lock_downgrade+0x900/0x900 [ 49.193378] ? kasan_check_read+0x11/0x20 [ 49.197519] ? do_raw_spin_unlock+0xa7/0x2f0 [ 49.201915] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 49.206492] ? mark_held_locks+0x130/0x130 [ 49.210717] ? _raw_spin_unlock+0x2c/0x50 [ 49.214900] ? ext4_discard_preallocations+0x18a/0x13c0 [ 49.220261] ? trace_hardirqs_on+0xbd/0x310 [ 49.224568] ? ext4_exit_mballoc+0xc0/0xc0 [ 49.228858] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 49.233875] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 49.238633] ? modules_open+0xa0/0xa0 [ 49.242433] ? __es_tree_search.isra.12+0x1ba/0x220 [ 49.247434] ? __es_remove_extent+0x9a3/0xba0 [ 49.252024] ? mark_held_locks+0x130/0x130 [ 49.256260] ? lock_downgrade+0x900/0x900 [ 49.260408] ? ext4_es_scan+0x960/0x960 [ 49.264375] ? lock_release+0x970/0x970 [ 49.268385] ? trace_hardirqs_on+0xbd/0x310 [ 49.272701] ? kasan_check_read+0x11/0x20 [ 49.276834] ? clear_inode+0x114/0x3a0 [ 49.280778] ? do_raw_write_trylock+0x1c0/0x1c0 [ 49.286171] ? kasan_check_write+0x14/0x20 [ 49.290401] ? lock_acquire+0x1ed/0x520 [ 49.294361] ? integrity_inode_free+0x77/0x320 [ 49.298941] ? ext4_es_remove_extent+0x151/0x500 [ 49.303788] ? lock_release+0x970/0x970 [ 49.307771] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 49.313064] ? depot_save_stack+0x292/0x470 [ 49.317391] ? kasan_check_write+0x14/0x20 [ 49.321632] ? do_raw_write_lock+0xbd/0x1b0 [ 49.325961] integrity_inode_free+0x12f/0x320 [ 49.330452] security_inode_free+0x19/0x90 [ 49.334675] __destroy_inode+0x328/0x820 [ 49.338724] ? generic_update_time+0x450/0x450 [ 49.343290] ? evict+0x5d8/0x980 [ 49.346644] ? lock_downgrade+0x900/0x900 [ 49.350781] ? __inode_wait_for_writeback+0x2cf/0x380 [ 49.355961] destroy_inode+0xda/0x200 [ 49.359748] ? __destroy_inode+0x820/0x820 [ 49.364032] ? kasan_check_write+0x14/0x20 [ 49.368289] ? do_raw_spin_lock+0xc1/0x200 [ 49.372513] evict+0x5e0/0x980 [ 49.375701] ? jbd2_journal_stop+0x430/0x15d0 [ 49.380198] ? destroy_inode+0x200/0x200 [ 49.384322] ? do_raw_spin_lock+0xc1/0x200 [ 49.388655] ? iput+0x671/0xa90 [ 49.391927] ? lock_downgrade+0x900/0x900 [ 49.396064] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 49.401592] ? kasan_check_read+0x11/0x20 [ 49.405727] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 49.410297] ? lock_downgrade+0x900/0x900 [ 49.414430] ? ext4_ioctl+0x231b/0x4210 [ 49.418492] iput+0x679/0xa90 [ 49.421608] ? inode_add_lru+0x2a0/0x2a0 [ 49.425825] ? up_write+0x7b/0x220 [ 49.429357] ? up_read+0x110/0x110 [ 49.432883] ? up_read+0x110/0x110 [ 49.436408] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.441938] ? check_preemption_disabled+0x48/0x200 [ 49.447135] ext4_ioctl+0x236f/0x4210 [ 49.450933] ? is_bpf_text_address+0xac/0x170 [ 49.455419] ? ext4_ioctl_group_add+0x560/0x560 [ 49.460121] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 49.466027] ? kasan_check_read+0x11/0x20 [ 49.470174] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 49.475435] ? rcu_bh_qs+0xc0/0xc0 [ 49.478966] ? unwind_dump+0x190/0x190 [ 49.482845] ? is_bpf_text_address+0xd3/0x170 [ 49.487326] ? kernel_text_address+0x79/0xf0 [ 49.491721] ? __kernel_text_address+0xd/0x40 [ 49.496201] ? unwind_get_return_address+0x61/0xa0 [ 49.501118] ? __save_stack_trace+0x8d/0xf0 [ 49.505432] ? save_stack+0xa9/0xd0 [ 49.509059] ? save_stack+0x43/0xd0 [ 49.512671] ? __kasan_slab_free+0x102/0x150 [ 49.517069] ? kasan_slab_free+0xe/0x10 [ 49.521033] ? kmem_cache_free+0x83/0x290 [ 49.525178] ? putname+0xf2/0x130 [ 49.528623] ? do_sys_open+0x54d/0x700 [ 49.532494] ? __x64_sys_openat+0x9d/0x100 [ 49.536714] ? do_syscall_64+0x1b9/0x820 [ 49.540767] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.546123] ? trace_hardirqs_off+0xb8/0x310 [ 49.550520] ? kasan_check_read+0x11/0x20 [ 49.554653] ? do_raw_spin_unlock+0xa7/0x2f0 [ 49.559054] ? trace_hardirqs_on+0x310/0x310 [ 49.563464] ? kasan_check_write+0x14/0x20 [ 49.567791] ? trace_hardirqs_off+0xb8/0x310 [ 49.572194] ? trace_hardirqs_on+0x310/0x310 [ 49.576596] ? ext4_ioctl_group_add+0x560/0x560 [ 49.581255] do_vfs_ioctl+0x1de/0x1720 [ 49.585131] ? trace_hardirqs_on+0xbd/0x310 [ 49.589440] ? ioctl_preallocate+0x300/0x300 [ 49.593838] ? memset+0x31/0x40 [ 49.597110] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.602637] ? smack_file_ioctl+0x210/0x3c0 [ 49.606943] ? fget_raw+0x20/0x20 [ 49.610383] ? smack_file_lock+0x2e0/0x2e0 [ 49.614612] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.620147] ? security_file_ioctl+0x94/0xc0 [ 49.624548] ksys_ioctl+0xa9/0xd0 [ 49.627988] __x64_sys_ioctl+0x73/0xb0 [ 49.631870] do_syscall_64+0x1b9/0x820 [ 49.635745] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 49.641199] ? syscall_return_slowpath+0x5e0/0x5e0 [ 49.646114] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.650956] ? trace_hardirqs_on_caller+0x310/0x310 [ 49.655956] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 49.661106] ? prepare_exit_to_usermode+0x291/0x3b0 [ 49.666223] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.671066] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.676242] RIP: 0033:0x440009 [ 49.679425] 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 [ 49.698315] RSP: 002b:00007ffc130b8888 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 49.706015] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 49.713286] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 49.720545] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 49.727802] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 49.735067] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 49.742328] Modules linked in: [ 49.745635] ---[ end trace 27dd6e0da65f8f3d ]--- [ 49.750459] RIP: 0010:rb_erase+0x306/0x3710 [ 49.754788] 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 [ 49.773863] RSP: 0018:ffff8801d32be918 EFLAGS: 00010202 [ 49.779337] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 49.786596] RDX: 1ffff1003a657d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 49.794171] RBP: ffff8801d32bf320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 49.801463] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8b3d1f0 [ 49.808758] R13: dffffc0000000000 R14: ffff8801d32bf2f8 R15: ffff8801d32bf438 [ 49.816044] FS: 0000000001e30880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 49.824302] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.830246] CR2: 0000000020000080 CR3: 00000001d3a12000 CR4: 00000000001406e0 [ 49.837511] Kernel panic - not syncing: Fatal exception [ 49.843846] Kernel Offset: disabled [ 49.847469] Rebooting in 86400 seconds..