[ 24.182590] audit: type=1800 audit(1540058756.628:21): pid=5171 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [ 24.210320] audit: type=1800 audit(1540058756.628:22): pid=5171 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. [ 25.313205] sshd (5238) used greatest stack depth: 15688 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.45' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 54.362187] kasan: CONFIG_KASAN_INLINE enabled [ 54.366947] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 54.374302] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 54.380514] CPU: 0 PID: 5328 Comm: syz-executor340 Not tainted 4.19.0-rc8+ #149 [ 54.387942] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.397417] RIP: 0010:rb_erase+0x306/0x3710 [ 54.401731] 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 [ 54.420629] RSP: 0018:ffff8801d8c46918 EFLAGS: 00010202 [ 54.425976] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 54.433229] RDX: 1ffff1003b188d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 54.440488] RBP: ffff8801d8c47320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 54.447842] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801c2405530 [ 54.455094] R13: dffffc0000000000 R14: ffff8801d8c472f8 R15: ffff8801d8c47438 [ 54.462430] FS: 0000000001ddb880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 54.470649] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.476518] CR2: 0000000020000080 CR3: 00000001bc57a000 CR4: 00000000001406f0 [ 54.483777] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 54.491034] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 54.498294] Call Trace: [ 54.500870] ? lockdep_on+0x50/0x50 [ 54.504482] ? rb_insert_color+0x1460/0x1460 [ 54.508877] ? lock_downgrade+0x900/0x900 [ 54.513017] ? noop_count+0x40/0x40 [ 54.516637] ? lock_pin_lock+0x350/0x350 [ 54.520690] ? rcu_bh_qs+0xc0/0xc0 [ 54.524210] ? unwind_dump+0x190/0x190 [ 54.528083] ? kasan_check_read+0x11/0x20 [ 54.532216] ? noop_count+0x40/0x40 [ 54.535827] ? lock_pin_lock+0x350/0x350 [ 54.539881] ? mark_held_locks+0x130/0x130 [ 54.544104] ? check_usage_forwards+0x3e0/0x3e0 [ 54.548760] ? __bfs+0x385/0x7a0 [ 54.552112] ? check_usage+0x1a9/0x790 [ 54.555979] ? lock_pin_lock+0x350/0x350 [ 54.560026] ? check_usage_forwards+0x3e0/0x3e0 [ 54.564685] ? __bfs+0x385/0x7a0 [ 54.568090] ? modules_open+0xa0/0xa0 [ 54.571879] ? lockdep_on+0x50/0x50 [ 54.575489] ? lock_pin_lock+0x350/0x350 [ 54.579652] ? mark_held_locks+0x130/0x130 [ 54.583872] ? kasan_check_read+0x11/0x20 [ 54.588003] ? __lock_acquire+0x2881/0x4ec0 [ 54.592312] ? mark_held_locks+0x130/0x130 [ 54.596538] ? print_usage_bug+0xc0/0xc0 [ 54.600596] ? _raw_spin_unlock+0x2c/0x50 [ 54.604840] ? graph_lock+0x170/0x170 [ 54.608635] ? ext4_exit_mballoc+0xc0/0xc0 [ 54.612853] ? __lock_acquire+0x7ec/0x4ec0 [ 54.617079] ? find_held_lock+0x36/0x1c0 [ 54.621126] ? mark_held_locks+0x130/0x130 [ 54.625343] ? lock_downgrade+0x900/0x900 [ 54.629475] ? ext4_es_scan+0x960/0x960 [ 54.633436] ? do_raw_write_trylock+0x1c0/0x1c0 [ 54.638089] ? kasan_check_write+0x14/0x20 [ 54.642305] ? lock_acquire+0x1ed/0x520 [ 54.646267] ? integrity_inode_free+0x77/0x320 [ 54.650835] ? ext4_es_remove_extent+0x151/0x500 [ 54.655574] ? lock_release+0x970/0x970 [ 54.659535] ? kasan_check_write+0x14/0x20 [ 54.663758] ? do_raw_write_lock+0xbd/0x1b0 [ 54.668072] integrity_inode_free+0x12f/0x320 [ 54.672556] security_inode_free+0x19/0x90 [ 54.676783] __destroy_inode+0x328/0x820 [ 54.680939] ? generic_update_time+0x450/0x450 [ 54.685501] ? evict+0x5d8/0x980 [ 54.688851] ? lock_downgrade+0x900/0x900 [ 54.692986] ? __inode_wait_for_writeback+0x2cf/0x380 [ 54.698163] destroy_inode+0xda/0x200 [ 54.701945] ? __destroy_inode+0x820/0x820 [ 54.706158] ? kasan_check_write+0x14/0x20 [ 54.710381] ? do_raw_spin_lock+0xc1/0x200 [ 54.714606] evict+0x5e0/0x980 [ 54.717804] ? destroy_inode+0x200/0x200 [ 54.721854] ? iput+0x671/0xa90 [ 54.725119] ? lock_downgrade+0x900/0x900 [ 54.729258] ? kasan_check_read+0x11/0x20 [ 54.733391] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 54.737961] ? lock_downgrade+0x900/0x900 [ 54.742095] iput+0x679/0xa90 [ 54.745184] ? inode_add_lru+0x2a0/0x2a0 [ 54.749228] ? up_write+0x7b/0x220 [ 54.752749] ? up_read+0x110/0x110 [ 54.756274] ? up_read+0x110/0x110 [ 54.759804] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.765441] ? check_preemption_disabled+0x48/0x200 [ 54.770452] ext4_ioctl+0x236f/0x4210 [ 54.774237] ? is_bpf_text_address+0xac/0x170 [ 54.778719] ? ext4_ioctl_group_add+0x560/0x560 [ 54.783422] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 54.789308] ? kasan_check_read+0x11/0x20 [ 54.793446] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 54.798759] ? rcu_bh_qs+0xc0/0xc0 [ 54.802288] ? rcu_bh_qs+0xc0/0xc0 [ 54.805819] ? unwind_dump+0x190/0x190 [ 54.809695] ? is_bpf_text_address+0xd3/0x170 [ 54.814175] ? kernel_text_address+0x79/0xf0 [ 54.818571] ? __kernel_text_address+0xd/0x40 [ 54.823049] ? unwind_get_return_address+0x61/0xa0 [ 54.828012] ? __save_stack_trace+0x8d/0xf0 [ 54.832325] ? save_stack+0xa9/0xd0 [ 54.835940] ? save_stack+0x43/0xd0 [ 54.839552] ? __kasan_slab_free+0x102/0x150 [ 54.843942] ? kasan_slab_free+0xe/0x10 [ 54.847906] ? kmem_cache_free+0x83/0x290 [ 54.852052] ? putname+0xf2/0x130 [ 54.855604] ? do_sys_open+0x54d/0x700 [ 54.859531] ? __x64_sys_openat+0x9d/0x100 [ 54.863756] ? do_syscall_64+0x1b9/0x820 [ 54.867804] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.873154] ? trace_hardirqs_off+0xb8/0x310 [ 54.877609] ? kasan_check_read+0x11/0x20 [ 54.881765] ? do_raw_spin_unlock+0xa7/0x2f0 [ 54.886163] ? trace_hardirqs_on+0x310/0x310 [ 54.890556] ? kasan_check_write+0x14/0x20 [ 54.894782] ? trace_hardirqs_off+0xb8/0x310 [ 54.899183] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.904714] ? check_preemption_disabled+0x48/0x200 [ 54.909723] ? check_preemption_disabled+0x48/0x200 [ 54.914730] ? ext4_ioctl_group_add+0x560/0x560 [ 54.919387] do_vfs_ioctl+0x1de/0x1720 [ 54.923262] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 54.928528] ? ioctl_preallocate+0x300/0x300 [ 54.933028] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.938553] ? __fget_light+0x2e9/0x430 [ 54.942511] ? fget_raw+0x20/0x20 [ 54.946066] ? putname+0xf2/0x130 [ 54.949644] ? rcu_read_lock_sched_held+0x108/0x120 [ 54.954651] ? kmem_cache_free+0x24f/0x290 [ 54.958876] ? putname+0xf7/0x130 [ 54.962317] ? do_syscall_64+0x9a/0x820 [ 54.966273] ? do_syscall_64+0x9a/0x820 [ 54.970232] ? lockdep_hardirqs_on+0x421/0x5c0 [ 54.974802] ? security_file_ioctl+0x94/0xc0 [ 54.979297] ksys_ioctl+0xa9/0xd0 [ 54.982742] __x64_sys_ioctl+0x73/0xb0 [ 54.986615] do_syscall_64+0x1b9/0x820 [ 54.990500] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 54.995857] ? syscall_return_slowpath+0x5e0/0x5e0 [ 55.000775] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 55.005609] ? trace_hardirqs_on_caller+0x310/0x310 [ 55.010718] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 55.015721] ? prepare_exit_to_usermode+0x291/0x3b0 [ 55.020725] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 55.025556] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.030735] RIP: 0033:0x440009 [ 55.033914] 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 [ 55.052904] RSP: 002b:00007ffdffddba48 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 55.060605] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 55.067879] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 55.075184] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 55.082446] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 55.089705] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 55.096968] Modules linked in: [ 55.100288] ---[ end trace c330a6350caa98b7 ]--- [ 55.105071] RIP: 0010:rb_erase+0x306/0x3710 [ 55.109542] 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 [ 55.128507] RSP: 0018:ffff8801d8c46918 EFLAGS: 00010202 [ 55.133875] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 55.141168] RDX: 1ffff1003b188d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 55.148554] RBP: ffff8801d8c47320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 55.155810] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801c2405530 [ 55.163203] R13: dffffc0000000000 R14: ffff8801d8c472f8 R15: ffff8801d8c47438 [ 55.170495] FS: 0000000001ddb880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 55.178746] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.184630] CR2: 0000000020000080 CR3: 00000001bc57a000 CR4: 00000000001406f0 [ 55.191919] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 55.199252] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.206510] Kernel panic - not syncing: Fatal exception [ 55.212722] Kernel Offset: disabled [ 55.216342] Rebooting in 86400 seconds..