[ 37.262470] audit: type=1800 audit(1539041838.573:22): pid=5694 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [ 37.297134] audit: type=1800 audit(1539041838.573:23): pid=5694 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2442 res=0 [ 37.325179] audit: type=1800 audit(1539041838.573:24): pid=5694 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 '10.128.10.59' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 46.002928] kasan: CONFIG_KASAN_INLINE enabled [ 46.007602] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 46.015025] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 46.021263] CPU: 0 PID: 5848 Comm: syz-executor059 Not tainted 4.19.0-rc7+ #51 [ 46.028607] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.037972] RIP: 0010:rb_erase+0x306/0x3710 [ 46.042282] 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 [ 46.061540] RSP: 0018:ffff8801bb88e918 EFLAGS: 00010202 [ 46.066893] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 46.074155] RDX: 1ffff10037711d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 46.081415] RBP: ffff8801bb88f320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 46.088688] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801c400a270 [ 46.095942] R13: dffffc0000000000 R14: ffff8801bb88f2f8 R15: ffff8801bb88f438 [ 46.103220] FS: 0000000001e14880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 46.111447] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.117341] CR2: 0000000020000380 CR3: 00000001bb405000 CR4: 00000000001406f0 [ 46.124597] Call Trace: [ 46.127178] ? rb_insert_color+0x1460/0x1460 [ 46.131577] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 46.136504] ? lock_downgrade+0x900/0x900 [ 46.140641] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 46.146422] ? mark_held_locks+0x130/0x130 [ 46.150640] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 46.155907] ? rcu_bh_qs+0xc0/0xc0 [ 46.159430] ? unwind_dump+0x190/0x190 [ 46.163326] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.168847] ? mark_held_locks+0x130/0x130 [ 46.173104] ? mark_page_accessed+0xcb0/0x2040 [ 46.177686] ? activate_page+0x1040/0x1040 [ 46.181905] ? activate_page+0x1040/0x1040 [ 46.186140] ? mark_held_locks+0x130/0x130 [ 46.190355] ? kasan_kmalloc+0xc7/0xe0 [ 46.194228] ? kmem_cache_alloc_trace+0x152/0x750 [ 46.199059] ? ima_add_digest_entry+0xcb/0x6a0 [ 46.203632] ? ima_add_template_entry+0x466/0x7f0 [ 46.208470] ? ima_store_template+0x224/0x310 [ 46.212981] ? pagecache_get_page+0x2d8/0xf00 [ 46.217478] ? find_get_pages_contig+0x15b0/0x15b0 [ 46.222397] ? is_bpf_text_address+0xac/0x170 [ 46.226895] ? lock_downgrade+0x900/0x900 [ 46.231030] ? mark_held_locks+0x130/0x130 [ 46.235250] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 46.241035] ? mark_held_locks+0x130/0x130 [ 46.245259] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 46.250626] ? lock_downgrade+0x900/0x900 [ 46.254761] ? kasan_check_read+0x11/0x20 [ 46.258894] ? do_raw_spin_unlock+0xa7/0x2f0 [ 46.263292] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 46.267858] ? mark_held_locks+0x130/0x130 [ 46.272081] ? _raw_spin_unlock+0x2c/0x50 [ 46.276214] ? ext4_discard_preallocations+0x18a/0x13c0 [ 46.281565] ? trace_hardirqs_on+0xbd/0x310 [ 46.285872] ? ext4_exit_mballoc+0xc0/0xc0 [ 46.290110] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 46.295115] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 46.299863] ? modules_open+0xa0/0xa0 [ 46.303649] ? __es_tree_search.isra.12+0x1ba/0x220 [ 46.308649] ? __es_remove_extent+0x9a3/0xba0 [ 46.313131] ? mark_held_locks+0x130/0x130 [ 46.317350] ? lock_downgrade+0x900/0x900 [ 46.321503] ? ext4_es_scan+0x960/0x960 [ 46.325465] ? lock_release+0x970/0x970 [ 46.329425] ? trace_hardirqs_on+0xbd/0x310 [ 46.333737] ? kasan_check_read+0x11/0x20 [ 46.337867] ? clear_inode+0x114/0x3a0 [ 46.341743] ? do_raw_write_trylock+0x1c0/0x1c0 [ 46.346394] ? kasan_check_write+0x14/0x20 [ 46.350616] ? lock_acquire+0x1ed/0x520 [ 46.354576] ? integrity_inode_free+0x77/0x320 [ 46.359147] ? ext4_es_remove_extent+0x151/0x500 [ 46.363886] ? lock_release+0x970/0x970 [ 46.367847] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 46.372955] ? depot_save_stack+0x292/0x470 [ 46.377271] ? kasan_check_write+0x14/0x20 [ 46.381492] ? do_raw_write_lock+0xbd/0x1b0 [ 46.385796] integrity_inode_free+0x12f/0x320 [ 46.390280] security_inode_free+0x19/0x90 [ 46.394500] __destroy_inode+0x328/0x820 [ 46.398567] ? generic_update_time+0x450/0x450 [ 46.403152] ? evict+0x5d8/0x980 [ 46.406505] ? lock_downgrade+0x900/0x900 [ 46.410639] ? __inode_wait_for_writeback+0x2cf/0x380 [ 46.415817] destroy_inode+0xda/0x200 [ 46.419607] ? __destroy_inode+0x820/0x820 [ 46.423824] ? kasan_check_write+0x14/0x20 [ 46.428042] ? do_raw_spin_lock+0xc1/0x200 [ 46.432266] evict+0x5e0/0x980 [ 46.435470] ? jbd2_journal_stop+0x430/0x15d0 [ 46.439959] ? destroy_inode+0x200/0x200 [ 46.444013] ? do_raw_spin_lock+0xc1/0x200 [ 46.448246] ? iput+0x671/0xa90 [ 46.451511] ? lock_downgrade+0x900/0x900 [ 46.455643] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 46.461179] ? kasan_check_read+0x11/0x20 [ 46.465313] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 46.469899] ? lock_downgrade+0x900/0x900 [ 46.474031] ? ext4_ioctl+0x231b/0x4210 [ 46.478010] iput+0x679/0xa90 [ 46.481102] ? inode_add_lru+0x2a0/0x2a0 [ 46.485150] ? up_write+0x7b/0x220 [ 46.488685] ? up_read+0x110/0x110 [ 46.492210] ? up_read+0x110/0x110 [ 46.495754] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.501282] ? check_preemption_disabled+0x48/0x200 [ 46.506284] ext4_ioctl+0x236f/0x4210 [ 46.510085] ? is_bpf_text_address+0xac/0x170 [ 46.514574] ? ext4_ioctl_group_add+0x560/0x560 [ 46.519229] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 46.525009] ? kasan_check_read+0x11/0x20 [ 46.529145] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 46.534406] ? rcu_bh_qs+0xc0/0xc0 [ 46.537930] ? unwind_dump+0x190/0x190 [ 46.541819] ? is_bpf_text_address+0xd3/0x170 [ 46.546300] ? kernel_text_address+0x79/0xf0 [ 46.550733] ? __kernel_text_address+0xd/0x40 [ 46.555213] ? unwind_get_return_address+0x61/0xa0 [ 46.560132] ? __save_stack_trace+0x8d/0xf0 [ 46.564442] ? save_stack+0xa9/0xd0 [ 46.568051] ? save_stack+0x43/0xd0 [ 46.571659] ? __kasan_slab_free+0x102/0x150 [ 46.576051] ? kasan_slab_free+0xe/0x10 [ 46.580035] ? kmem_cache_free+0x83/0x290 [ 46.584185] ? putname+0xf2/0x130 [ 46.587650] ? do_sys_open+0x54d/0x700 [ 46.591539] ? __x64_sys_openat+0x9d/0x100 [ 46.595757] ? do_syscall_64+0x1b9/0x820 [ 46.599806] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.605156] ? trace_hardirqs_off+0xb8/0x310 [ 46.609549] ? kasan_check_read+0x11/0x20 [ 46.613682] ? do_raw_spin_unlock+0xa7/0x2f0 [ 46.618090] ? trace_hardirqs_on+0x310/0x310 [ 46.622629] ? kasan_check_write+0x14/0x20 [ 46.626848] ? trace_hardirqs_off+0xb8/0x310 [ 46.631240] ? trace_hardirqs_on+0x310/0x310 [ 46.635634] ? ext4_ioctl_group_add+0x560/0x560 [ 46.640317] do_vfs_ioctl+0x1de/0x1720 [ 46.644188] ? trace_hardirqs_on+0xbd/0x310 [ 46.648504] ? ioctl_preallocate+0x300/0x300 [ 46.652907] ? memset+0x31/0x40 [ 46.656178] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.661702] ? smack_file_ioctl+0x210/0x3c0 [ 46.666024] ? fget_raw+0x20/0x20 [ 46.669464] ? smack_file_lock+0x2e0/0x2e0 [ 46.673690] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.679213] ? security_file_ioctl+0x94/0xc0 [ 46.683607] ksys_ioctl+0xa9/0xd0 [ 46.687044] __x64_sys_ioctl+0x73/0xb0 [ 46.690920] do_syscall_64+0x1b9/0x820 [ 46.694793] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 46.700161] ? syscall_return_slowpath+0x5e0/0x5e0 [ 46.705092] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.709932] ? trace_hardirqs_on_caller+0x310/0x310 [ 46.714942] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 46.719959] ? prepare_exit_to_usermode+0x291/0x3b0 [ 46.724980] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.729829] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.735001] RIP: 0033:0x440009 [ 46.738180] 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 [ 46.757069] RSP: 002b:00007ffc4005e358 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 46.764759] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 46.772013] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 46.779284] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 46.786538] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 46.793789] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 46.801045] Modules linked in: [ 46.804379] ---[ end trace a64a3ffeea377b8b ]--- [ 46.809195] RIP: 0010:rb_erase+0x306/0x3710 [ 46.813545] 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 [ 46.832476] RSP: 0018:ffff8801bb88e918 EFLAGS: 00010202 [ 46.837857] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 46.845247] RDX: 1ffff10037711d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 46.852562] RBP: ffff8801bb88f320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 46.859852] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801c400a270 [ 46.867107] R13: dffffc0000000000 R14: ffff8801bb88f2f8 R15: ffff8801bb88f438 [ 46.874430] FS: 0000000001e14880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 46.882700] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.888599] CR2: 0000000020000380 CR3: 00000001bb405000 CR4: 00000000001406f0 [ 46.895869] Kernel panic - not syncing: Fatal exception [ 46.902227] Kernel Offset: disabled [ 46.905851] Rebooting in 86400 seconds..