[ 33.403778] audit: type=1800 audit(1539133228.789:22): pid=5669 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [ 33.435557] audit: type=1800 audit(1539133228.789:23): pid=5669 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2442 res=0 [ 33.463948] audit: type=1800 audit(1539133228.799:24): pid=5669 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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 '10.128.0.109' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.745816] kasan: CONFIG_KASAN_INLINE enabled [ 43.750422] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 43.757814] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 43.764063] CPU: 1 PID: 5825 Comm: syz-executor722 Not tainted 4.19.0-rc6+ #135 [ 43.771490] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.780838] RIP: 0010:rb_erase+0x306/0x3710 [ 43.785144] 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 [ 43.804034] RSP: 0018:ffff8801bbf96918 EFLAGS: 00010202 [ 43.809379] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 43.816633] RDX: 1ffff100377f2d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 43.823889] RBP: ffff8801bbf97320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 43.831143] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801c50092b0 [ 43.838396] R13: dffffc0000000000 R14: ffff8801bbf972f8 R15: ffff8801bbf97438 [ 43.845675] FS: 0000000002578880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 43.853889] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.859751] CR2: 0000000020000080 CR3: 00000001c3681000 CR4: 00000000001406e0 [ 43.867001] Call Trace: [ 43.869583] ? rb_insert_color+0x1460/0x1460 [ 43.873987] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 43.878914] ? lock_downgrade+0x900/0x900 [ 43.883065] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 43.888843] ? mark_held_locks+0x130/0x130 [ 43.893078] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 43.898337] ? rcu_bh_qs+0xc0/0xc0 [ 43.901860] ? unwind_dump+0x190/0x190 [ 43.905750] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 43.911267] ? mark_held_locks+0x130/0x130 [ 43.915486] ? mark_page_accessed+0xcb0/0x2040 [ 43.920062] ? activate_page+0x1040/0x1040 [ 43.924278] ? activate_page+0x1040/0x1040 [ 43.928498] ? mark_held_locks+0x130/0x130 [ 43.932715] ? kasan_kmalloc+0xc7/0xe0 [ 43.936588] ? kmem_cache_alloc_trace+0x152/0x750 [ 43.941419] ? ima_add_digest_entry+0xcb/0x6a0 [ 43.945997] ? ima_add_template_entry+0x466/0x7f0 [ 43.950822] ? ima_store_template+0x224/0x310 [ 43.955304] ? pagecache_get_page+0x2d8/0xf00 [ 43.959782] ? find_get_pages_contig+0x15b0/0x15b0 [ 43.964701] ? is_bpf_text_address+0xac/0x170 [ 43.969194] ? lock_downgrade+0x900/0x900 [ 43.973328] ? mark_held_locks+0x130/0x130 [ 43.977548] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 43.983331] ? mark_held_locks+0x130/0x130 [ 43.987552] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 43.992898] ? lock_downgrade+0x900/0x900 [ 43.997037] ? kasan_check_read+0x11/0x20 [ 44.001169] ? do_raw_spin_unlock+0xa7/0x2f0 [ 44.005561] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 44.010127] ? mark_held_locks+0x130/0x130 [ 44.014362] ? _raw_spin_unlock+0x2c/0x50 [ 44.018497] ? ext4_discard_preallocations+0x18a/0x13c0 [ 44.023848] ? trace_hardirqs_on+0xbd/0x310 [ 44.028158] ? ext4_exit_mballoc+0xc0/0xc0 [ 44.032380] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 44.037387] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 44.042133] ? modules_open+0xa0/0xa0 [ 44.045922] ? __es_tree_search.isra.12+0x1ba/0x220 [ 44.050923] ? __es_remove_extent+0x9a3/0xba0 [ 44.055400] ? mark_held_locks+0x130/0x130 [ 44.059624] ? lock_downgrade+0x900/0x900 [ 44.063753] ? ext4_es_scan+0x960/0x960 [ 44.067707] ? lock_release+0x970/0x970 [ 44.071667] ? trace_hardirqs_on+0xbd/0x310 [ 44.075974] ? kasan_check_read+0x11/0x20 [ 44.080104] ? clear_inode+0x114/0x3a0 [ 44.083975] ? do_raw_write_trylock+0x1c0/0x1c0 [ 44.088625] ? kasan_check_write+0x14/0x20 [ 44.092844] ? lock_acquire+0x1ed/0x520 [ 44.096811] ? integrity_inode_free+0x77/0x320 [ 44.101372] ? ext4_es_remove_extent+0x151/0x500 [ 44.106135] ? lock_release+0x970/0x970 [ 44.110096] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 44.115183] ? depot_save_stack+0x292/0x470 [ 44.119491] ? kasan_check_write+0x14/0x20 [ 44.123710] ? do_raw_write_lock+0xbd/0x1b0 [ 44.128015] integrity_inode_free+0x12f/0x320 [ 44.132500] security_inode_free+0x19/0x90 [ 44.136721] __destroy_inode+0x328/0x820 [ 44.140779] ? generic_update_time+0x450/0x450 [ 44.145344] ? evict+0x5d8/0x980 [ 44.148690] ? lock_downgrade+0x900/0x900 [ 44.152820] ? __inode_wait_for_writeback+0x2cf/0x380 [ 44.157996] destroy_inode+0xda/0x200 [ 44.161799] ? __destroy_inode+0x820/0x820 [ 44.166035] ? kasan_check_write+0x14/0x20 [ 44.170270] ? do_raw_spin_lock+0xc1/0x200 [ 44.174742] evict+0x5e0/0x980 [ 44.177919] ? jbd2_journal_stop+0x430/0x15d0 [ 44.182414] ? destroy_inode+0x200/0x200 [ 44.186456] ? do_raw_spin_lock+0xc1/0x200 [ 44.190669] ? iput+0x671/0xa90 [ 44.193949] ? lock_downgrade+0x900/0x900 [ 44.198087] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 44.203609] ? kasan_check_read+0x11/0x20 [ 44.207752] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 44.212326] ? lock_downgrade+0x900/0x900 [ 44.216467] ? ext4_ioctl+0x231b/0x4210 [ 44.220428] iput+0x679/0xa90 [ 44.223518] ? inode_add_lru+0x2a0/0x2a0 [ 44.227585] ? up_write+0x7b/0x220 [ 44.231125] ? up_read+0x110/0x110 [ 44.234663] ? up_read+0x110/0x110 [ 44.238185] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.243711] ? check_preemption_disabled+0x48/0x200 [ 44.248712] ext4_ioctl+0x236f/0x4210 [ 44.252497] ? is_bpf_text_address+0xac/0x170 [ 44.256975] ? ext4_ioctl_group_add+0x560/0x560 [ 44.261630] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 44.267416] ? kasan_check_read+0x11/0x20 [ 44.271554] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 44.276826] ? rcu_bh_qs+0xc0/0xc0 [ 44.280349] ? unwind_dump+0x190/0x190 [ 44.284221] ? is_bpf_text_address+0xd3/0x170 [ 44.288716] ? kernel_text_address+0x79/0xf0 [ 44.293109] ? __kernel_text_address+0xd/0x40 [ 44.297585] ? unwind_get_return_address+0x61/0xa0 [ 44.302514] ? __save_stack_trace+0x8d/0xf0 [ 44.306835] ? save_stack+0xa9/0xd0 [ 44.310464] ? save_stack+0x43/0xd0 [ 44.314083] ? __kasan_slab_free+0x102/0x150 [ 44.318495] ? kasan_slab_free+0xe/0x10 [ 44.322448] ? kmem_cache_free+0x83/0x290 [ 44.326571] ? putname+0xf2/0x130 [ 44.330004] ? do_sys_open+0x54d/0x700 [ 44.333879] ? __x64_sys_openat+0x9d/0x100 [ 44.338100] ? do_syscall_64+0x1b9/0x820 [ 44.342145] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.347505] ? trace_hardirqs_off+0xb8/0x310 [ 44.351906] ? kasan_check_read+0x11/0x20 [ 44.356039] ? do_raw_spin_unlock+0xa7/0x2f0 [ 44.360426] ? trace_hardirqs_on+0x310/0x310 [ 44.364817] ? kasan_check_write+0x14/0x20 [ 44.369035] ? trace_hardirqs_off+0xb8/0x310 [ 44.373434] ? trace_hardirqs_on+0x310/0x310 [ 44.377825] ? ext4_ioctl_group_add+0x560/0x560 [ 44.382479] do_vfs_ioctl+0x1de/0x1720 [ 44.386369] ? trace_hardirqs_on+0xbd/0x310 [ 44.390684] ? ioctl_preallocate+0x300/0x300 [ 44.395091] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.400625] ? __fget_light+0x2e9/0x430 [ 44.404581] ? fget_raw+0x20/0x20 [ 44.408015] ? putname+0xf2/0x130 [ 44.411463] ? kmem_cache_free+0x21a/0x290 [ 44.415680] ? putname+0xf7/0x130 [ 44.419123] ? security_file_ioctl+0x94/0xc0 [ 44.423516] ksys_ioctl+0xa9/0xd0 [ 44.426971] __x64_sys_ioctl+0x73/0xb0 [ 44.430842] do_syscall_64+0x1b9/0x820 [ 44.434725] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 44.440073] ? syscall_return_slowpath+0x5e0/0x5e0 [ 44.445002] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.449827] ? trace_hardirqs_on_caller+0x310/0x310 [ 44.454827] ? prepare_exit_to_usermode+0x291/0x3b0 [ 44.459825] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.464662] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.469835] RIP: 0033:0x440089 [ 44.473011] 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 [ 44.491894] RSP: 002b:00007ffe625e8e38 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 44.499586] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 44.506836] RDX: 0000000000440089 RSI: 0000000000006611 RDI: 0000000000000003 [ 44.514088] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 44.521339] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 44.528587] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 44.535838] Modules linked in: [ 44.539146] ---[ end trace 9532cc54fcf2d144 ]--- [ 44.544032] RIP: 0010:rb_erase+0x306/0x3710 [ 44.548355] 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 [ 44.567515] RSP: 0018:ffff8801bbf96918 EFLAGS: 00010202 [ 44.572964] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 44.580235] RDX: 1ffff100377f2d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 44.587519] RBP: ffff8801bbf97320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 44.594804] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801c50092b0 [ 44.602057] R13: dffffc0000000000 R14: ffff8801bbf972f8 R15: ffff8801bbf97438 [ 44.609343] FS: 0000000002578880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 44.617583] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.623476] CR2: 0000000020000080 CR3: 00000001c3681000 CR4: 00000000001406e0 [ 44.630747] Kernel panic - not syncing: Fatal exception [ 44.636981] Kernel Offset: disabled [ 44.640602] Rebooting in 86400 seconds..