[ 28.767887] audit: type=1800 audit(1539784841.647:27): pid=5251 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 28.796710] audit: type=1800 audit(1539784841.647:28): pid=5251 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 29.633045] audit: type=1800 audit(1539784842.587:29): pid=5251 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 29.660634] audit: type=1800 audit(1539784842.587:30): pid=5251 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.38' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.603040] kasan: CONFIG_KASAN_INLINE enabled [ 42.607785] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.615203] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 42.621446] CPU: 1 PID: 5407 Comm: syz-executor260 Not tainted 4.19.0-rc7+ #264 [ 42.628886] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.638252] RIP: 0010:rb_erase+0x306/0x3710 [ 42.642561] 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 [ 42.661452] RSP: 0018:ffff8801c60fe918 EFLAGS: 00010202 [ 42.666800] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 42.674066] RDX: 1ffff10038c1fd2b RSI: ffffffff8afc5020 RDI: 0000000000000008 [ 42.681318] RBP: ffff8801c60ff320 R08: dffffc0000000000 R09: fffffbfff12d68f0 [ 42.688571] R10: fffffbfff12d68f0 R11: ffffffff896b4783 R12: ffff8801b72e7970 [ 42.695826] R13: dffffc0000000000 R14: ffff8801c60ff2f8 R15: ffff8801c60ff438 [ 42.703106] FS: 00000000012d7880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 42.711325] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.717201] CR2: 0000000020000080 CR3: 00000001d81be000 CR4: 00000000001406e0 [ 42.724466] Call Trace: [ 42.727051] ? lockdep_on+0x50/0x50 [ 42.730663] ? rb_insert_color+0x1460/0x1460 [ 42.735073] ? noop_count+0x40/0x40 [ 42.738697] ? lock_pin_lock+0x350/0x350 [ 42.742745] ? kasan_check_read+0x11/0x20 [ 42.746883] ? noop_count+0x40/0x40 [ 42.750527] ? lock_pin_lock+0x350/0x350 [ 42.754576] ? mark_held_locks+0x130/0x130 [ 42.758798] ? check_usage_forwards+0x3e0/0x3e0 [ 42.763451] ? __bfs+0x385/0x7a0 [ 42.766802] ? noop_count+0x40/0x40 [ 42.770415] ? check_usage+0x1a9/0x790 [ 42.774295] ? lock_pin_lock+0x350/0x350 [ 42.778372] ? check_usage_forwards+0x3e0/0x3e0 [ 42.783034] ? __bfs+0x385/0x7a0 [ 42.786416] ? modules_open+0xa0/0xa0 [ 42.790227] ? lockdep_on+0x50/0x50 [ 42.793850] ? lock_pin_lock+0x350/0x350 [ 42.797922] ? mark_held_locks+0x130/0x130 [ 42.802143] ? kasan_check_read+0x11/0x20 [ 42.806275] ? __lock_acquire+0x2881/0x4ec0 [ 42.810585] ? mark_held_locks+0x130/0x130 [ 42.814825] ? print_usage_bug+0xc0/0xc0 [ 42.818906] ? _raw_spin_unlock+0x2c/0x50 [ 42.823073] ? graph_lock+0x170/0x170 [ 42.826888] ? ext4_exit_mballoc+0xc0/0xc0 [ 42.831117] ? __lock_acquire+0x7ec/0x4ec0 [ 42.835336] ? find_held_lock+0x36/0x1c0 [ 42.839403] ? mark_held_locks+0x130/0x130 [ 42.843622] ? lock_downgrade+0x900/0x900 [ 42.847756] ? ext4_es_scan+0x960/0x960 [ 42.851729] ? lock_release+0x970/0x970 [ 42.855691] ? do_raw_write_trylock+0x1c0/0x1c0 [ 42.860347] ? kasan_check_write+0x14/0x20 [ 42.864567] ? lock_acquire+0x1ed/0x520 [ 42.868535] ? integrity_inode_free+0x77/0x320 [ 42.873127] ? ext4_es_remove_extent+0x151/0x500 [ 42.877869] ? lock_release+0x970/0x970 [ 42.881830] ? kasan_check_write+0x14/0x20 [ 42.886049] ? do_raw_write_lock+0xbd/0x1b0 [ 42.890369] integrity_inode_free+0x12f/0x320 [ 42.894856] security_inode_free+0x19/0x90 [ 42.899078] __destroy_inode+0x328/0x820 [ 42.903137] ? generic_update_time+0x450/0x450 [ 42.907707] ? evict+0x5d8/0x980 [ 42.911058] ? lock_downgrade+0x900/0x900 [ 42.915190] ? __inode_wait_for_writeback+0x2cf/0x380 [ 42.920368] destroy_inode+0xda/0x200 [ 42.924161] ? __destroy_inode+0x820/0x820 [ 42.928412] ? kasan_check_write+0x14/0x20 [ 42.932644] ? do_raw_spin_lock+0xc1/0x200 [ 42.936927] evict+0x5e0/0x980 [ 42.940113] ? destroy_inode+0x200/0x200 [ 42.944158] ? iput+0x671/0xa90 [ 42.947422] ? lock_downgrade+0x900/0x900 [ 42.951558] ? kasan_check_read+0x11/0x20 [ 42.955691] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 42.960254] ? lock_downgrade+0x900/0x900 [ 42.964420] iput+0x679/0xa90 [ 42.967530] ? inode_add_lru+0x2a0/0x2a0 [ 42.971590] ? up_write+0x7b/0x220 [ 42.975133] ? up_read+0x110/0x110 [ 42.978655] ? up_read+0x110/0x110 [ 42.982184] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.987707] ? check_preemption_disabled+0x48/0x200 [ 42.992708] ext4_ioctl+0x236f/0x4210 [ 42.996499] ? is_bpf_text_address+0xac/0x170 [ 43.001004] ? ext4_ioctl_group_add+0x560/0x560 [ 43.005661] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 43.011442] ? kasan_check_read+0x11/0x20 [ 43.015576] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 43.020874] ? rcu_bh_qs+0xc0/0xc0 [ 43.024411] ? rcu_bh_qs+0xc0/0xc0 [ 43.027954] ? unwind_dump+0x190/0x190 [ 43.031828] ? is_bpf_text_address+0xd3/0x170 [ 43.036309] ? kernel_text_address+0x79/0xf0 [ 43.040703] ? __kernel_text_address+0xd/0x40 [ 43.045185] ? unwind_get_return_address+0x61/0xa0 [ 43.050101] ? __save_stack_trace+0x8d/0xf0 [ 43.054418] ? save_stack+0xa9/0xd0 [ 43.058052] ? save_stack+0x43/0xd0 [ 43.061663] ? __kasan_slab_free+0x102/0x150 [ 43.066069] ? kasan_slab_free+0xe/0x10 [ 43.070027] ? kmem_cache_free+0x83/0x290 [ 43.074157] ? putname+0xf2/0x130 [ 43.077598] ? do_sys_open+0x54d/0x700 [ 43.081468] ? __x64_sys_openat+0x9d/0x100 [ 43.085687] ? do_syscall_64+0x1b9/0x820 [ 43.089734] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 43.095084] ? trace_hardirqs_off+0xb8/0x310 [ 43.099473] ? kasan_check_read+0x11/0x20 [ 43.103606] ? do_raw_spin_unlock+0xa7/0x2f0 [ 43.107998] ? trace_hardirqs_on+0x310/0x310 [ 43.112391] ? kasan_check_write+0x14/0x20 [ 43.116614] ? trace_hardirqs_off+0xb8/0x310 [ 43.121007] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.126529] ? check_preemption_disabled+0x48/0x200 [ 43.131543] ? check_preemption_disabled+0x48/0x200 [ 43.136548] ? ext4_ioctl_group_add+0x560/0x560 [ 43.141203] do_vfs_ioctl+0x1de/0x1720 [ 43.145079] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 43.150343] ? ioctl_preallocate+0x300/0x300 [ 43.154738] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.160261] ? __fget_light+0x2e9/0x430 [ 43.164234] ? fget_raw+0x20/0x20 [ 43.167704] ? putname+0xf2/0x130 [ 43.171166] ? rcu_read_lock_sched_held+0x108/0x120 [ 43.176186] ? kmem_cache_free+0x24f/0x290 [ 43.180408] ? putname+0xf7/0x130 [ 43.183849] ? do_syscall_64+0x9a/0x820 [ 43.187820] ? do_syscall_64+0x9a/0x820 [ 43.191789] ? lockdep_hardirqs_on+0x421/0x5c0 [ 43.196365] ? security_file_ioctl+0x94/0xc0 [ 43.200756] ksys_ioctl+0xa9/0xd0 [ 43.204193] __x64_sys_ioctl+0x73/0xb0 [ 43.208068] do_syscall_64+0x1b9/0x820 [ 43.211965] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 43.217329] ? syscall_return_slowpath+0x5e0/0x5e0 [ 43.222243] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.227069] ? trace_hardirqs_on_caller+0x310/0x310 [ 43.232079] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 43.237098] ? prepare_exit_to_usermode+0x291/0x3b0 [ 43.242101] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.246952] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 43.252124] RIP: 0033:0x440009 [ 43.255303] 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 [ 43.274202] RSP: 002b:00007ffc28630888 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 43.281986] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 43.289251] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 43.296502] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 43.303765] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 43.311048] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 43.318300] Modules linked in: [ 43.321587] ---[ end trace 0f8a40dd3a9826c9 ]--- [ 43.326393] RIP: 0010:rb_erase+0x306/0x3710 [ 43.330704] 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 [ 43.349630] RSP: 0018:ffff8801c60fe918 EFLAGS: 00010202 [ 43.355034] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 43.362291] RDX: 1ffff10038c1fd2b RSI: ffffffff8afc5020 RDI: 0000000000000008 [ 43.369576] RBP: ffff8801c60ff320 R08: dffffc0000000000 R09: fffffbfff12d68f0 [ 43.376876] R10: fffffbfff12d68f0 R11: ffffffff896b4783 R12: ffff8801b72e7970 [ 43.384137] R13: dffffc0000000000 R14: ffff8801c60ff2f8 R15: ffff8801c60ff438 [ 43.391434] FS: 00000000012d7880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 43.399677] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.405588] CR2: 0000000020000080 CR3: 00000001d81be000 CR4: 00000000001406e0 [ 43.412875] Kernel panic - not syncing: Fatal exception [ 43.419033] Kernel Offset: disabled [ 43.422658] Rebooting in 86400 seconds..