[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 29.727945] audit: type=1800 audit(1539665189.484:33): pid=5312 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 29.748888] audit: type=1800 audit(1539665189.484:34): pid=5312 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 36.979615] audit: type=1400 audit(1539665196.744:35): avc: denied { map } for pid=5489 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.22' (ECDSA) to the list of known hosts. executing program [ 43.977127] audit: type=1400 audit(1539665203.734:36): avc: denied { map } for pid=5502 comm="syz-executor848" path="/root/syz-executor848909705" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 43.982190] kasan: CONFIG_KASAN_INLINE enabled [ 44.008126] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 44.015617] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 44.021840] CPU: 0 PID: 5502 Comm: syz-executor848 Not tainted 4.19.0-rc8+ #64 [ 44.029189] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.038533] RIP: 0010:rb_erase+0x306/0x3710 [ 44.042835] 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 [ 44.062064] RSP: 0018:ffff8801b780e918 EFLAGS: 00010202 [ 44.067403] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 44.074651] RDX: 1ffff10036f01d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 44.081908] RBP: ffff8801b780f320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 44.089157] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b2f1b3b0 [ 44.096408] R13: dffffc0000000000 R14: ffff8801b780f2f8 R15: ffff8801b780f438 [ 44.103659] FS: 00000000009aa880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 44.111883] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.117742] CR2: 0000000020000700 CR3: 00000001c72ca000 CR4: 00000000001406f0 [ 44.124992] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.132240] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.139485] Call Trace: [ 44.142054] ? lockdep_on+0x50/0x50 [ 44.145661] ? rb_insert_color+0x1460/0x1460 [ 44.150064] ? noop_count+0x40/0x40 [ 44.153677] ? lock_pin_lock+0x350/0x350 [ 44.157720] ? mark_held_locks+0x130/0x130 [ 44.161937] ? kasan_check_read+0x11/0x20 [ 44.166083] ? noop_count+0x40/0x40 [ 44.169699] ? lock_pin_lock+0x350/0x350 [ 44.173743] ? mark_held_locks+0x130/0x130 [ 44.177956] ? check_usage_forwards+0x3e0/0x3e0 [ 44.182603] ? __bfs+0x385/0x7a0 [ 44.185948] ? noop_count+0x40/0x40 [ 44.189559] ? check_usage+0x1a9/0x790 [ 44.193424] ? lock_pin_lock+0x350/0x350 [ 44.197462] ? check_usage_forwards+0x3e0/0x3e0 [ 44.202109] ? __bfs+0x385/0x7a0 [ 44.205453] ? lockdep_on+0x50/0x50 [ 44.209062] ? lock_pin_lock+0x350/0x350 [ 44.213109] ? mark_held_locks+0x130/0x130 [ 44.217323] ? kasan_check_read+0x11/0x20 [ 44.221449] ? __lock_acquire+0x2881/0x4ec0 [ 44.225755] ? mark_held_locks+0x130/0x130 [ 44.229971] ? print_usage_bug+0xc0/0xc0 [ 44.234010] ? _raw_spin_unlock+0x2c/0x50 [ 44.238140] ? graph_lock+0x170/0x170 [ 44.241921] ? ext4_exit_mballoc+0xc0/0xc0 [ 44.246138] ? __lock_acquire+0x7ec/0x4ec0 [ 44.250355] ? find_held_lock+0x36/0x1c0 [ 44.254395] ? mark_held_locks+0x130/0x130 [ 44.258612] ? lock_downgrade+0x900/0x900 [ 44.262741] ? ext4_es_scan+0x960/0x960 [ 44.266694] ? lock_release+0x970/0x970 [ 44.270652] ? do_raw_write_trylock+0x1c0/0x1c0 [ 44.275310] ? kasan_check_write+0x14/0x20 [ 44.279538] ? lock_acquire+0x1ed/0x520 [ 44.283508] ? integrity_inode_free+0x77/0x320 [ 44.288067] ? ext4_es_remove_extent+0x151/0x500 [ 44.292807] ? lock_release+0x970/0x970 [ 44.296763] ? kasan_check_write+0x14/0x20 [ 44.300978] ? do_raw_write_lock+0xbd/0x1b0 [ 44.305279] integrity_inode_free+0x12f/0x320 [ 44.309775] security_inode_free+0x19/0x90 [ 44.313989] __destroy_inode+0x328/0x820 [ 44.318031] ? generic_update_time+0x450/0x450 [ 44.322594] ? evict+0x5d8/0x980 [ 44.325940] ? lock_downgrade+0x900/0x900 [ 44.330072] ? __inode_wait_for_writeback+0x2cf/0x380 [ 44.335246] destroy_inode+0xda/0x200 [ 44.339025] ? __destroy_inode+0x820/0x820 [ 44.343235] ? kasan_check_write+0x14/0x20 [ 44.347447] ? do_raw_spin_lock+0xc1/0x200 [ 44.351671] evict+0x5e0/0x980 [ 44.354869] ? destroy_inode+0x200/0x200 [ 44.358910] ? iput+0x671/0xa90 [ 44.362168] ? lock_downgrade+0x900/0x900 [ 44.366299] ? kasan_check_read+0x11/0x20 [ 44.370429] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 44.374988] ? lock_downgrade+0x900/0x900 [ 44.379120] iput+0x679/0xa90 [ 44.382208] ? inode_add_lru+0x2a0/0x2a0 [ 44.386248] ? up_write+0x7b/0x220 [ 44.389769] ? up_read+0x110/0x110 [ 44.393286] ? up_read+0x110/0x110 [ 44.396808] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.402328] ? check_preemption_disabled+0x48/0x200 [ 44.407325] ext4_ioctl+0x236f/0x4210 [ 44.411110] ? ext4_ioctl_group_add+0x560/0x560 [ 44.415764] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 44.421537] ? kasan_check_read+0x11/0x20 [ 44.425671] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 44.430933] ? rcu_bh_qs+0xc0/0xc0 [ 44.434451] ? rcu_bh_qs+0xc0/0xc0 [ 44.437971] ? unwind_dump+0x190/0x190 [ 44.441844] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.447359] ? avc_has_extended_perms+0xab2/0x15a0 [ 44.452271] ? avc_ss_reset+0x190/0x190 [ 44.456227] ? save_stack+0xa9/0xd0 [ 44.459836] ? save_stack+0x43/0xd0 [ 44.463440] ? __kasan_slab_free+0x102/0x150 [ 44.467822] ? kasan_slab_free+0xe/0x10 [ 44.471781] ? kmem_cache_free+0x83/0x290 [ 44.475910] ? putname+0xf2/0x130 [ 44.479344] ? do_sys_open+0x54d/0x700 [ 44.483211] ? __x64_sys_open+0x7e/0xc0 [ 44.487181] ? do_syscall_64+0x1b9/0x820 [ 44.491225] ? kasan_check_read+0x11/0x20 [ 44.495359] ? ___might_sleep+0x1ed/0x300 [ 44.499486] ? arch_local_save_flags+0x40/0x40 [ 44.504062] ? kasan_check_write+0x14/0x20 [ 44.508291] ? trace_hardirqs_off+0xb8/0x310 [ 44.512689] ? ext4_ioctl_group_add+0x560/0x560 [ 44.517352] do_vfs_ioctl+0x1de/0x1720 [ 44.521223] ? ioctl_preallocate+0x300/0x300 [ 44.525615] ? selinux_file_mprotect+0x620/0x620 [ 44.530353] ? rcu_read_lock_sched_held+0x108/0x120 [ 44.535349] ? kmem_cache_free+0x18b/0x290 [ 44.539567] ? putname+0xf7/0x130 [ 44.543000] ? do_syscall_64+0x9a/0x820 [ 44.546955] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.552475] ? security_file_ioctl+0x94/0xc0 [ 44.556866] ksys_ioctl+0xa9/0xd0 [ 44.560299] __x64_sys_ioctl+0x73/0xb0 [ 44.564176] do_syscall_64+0x1b9/0x820 [ 44.568051] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 44.573395] ? syscall_return_slowpath+0x5e0/0x5e0 [ 44.578304] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.583129] ? trace_hardirqs_on_caller+0x310/0x310 [ 44.588142] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 44.593244] ? prepare_exit_to_usermode+0x291/0x3b0 [ 44.598250] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.603080] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.608250] RIP: 0033:0x440029 [ 44.611430] 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 [ 44.630316] RSP: 002b:00007ffca91c1788 EFLAGS: 00000207 ORIG_RAX: 0000000000000010 [ 44.638008] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440029 [ 44.645265] RDX: 0000000000440029 RSI: 0000000000006611 RDI: 0000000000000003 [ 44.652520] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 44.659788] R10: 0000000000000000 R11: 0000000000000207 R12: 00000000004018b0 [ 44.667042] R13: 0000000000401940 R14: 0000000000000000 R15: 0000000000000000 [ 44.674303] Modules linked in: [ 44.677544] ---[ end trace 2221a11bf5bf924b ]--- [ 44.682354] RIP: 0010:rb_erase+0x306/0x3710 [ 44.686714] 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 [ 44.705635] RSP: 0018:ffff8801b780e918 EFLAGS: 00010202 [ 44.711043] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 44.718319] RDX: 1ffff10036f01d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 44.725604] RBP: ffff8801b780f320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 44.732893] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b2f1b3b0 [ 44.740183] R13: dffffc0000000000 R14: ffff8801b780f2f8 R15: ffff8801b780f438 [ 44.747460] FS: 00000000009aa880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 44.755721] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.761622] CR2: 0000000020000700 CR3: 00000001c72ca000 CR4: 00000000001406f0 [ 44.768923] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.776209] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.783495] Kernel panic - not syncing: Fatal exception [ 44.789726] Kernel Offset: disabled [ 44.793354] Rebooting in 86400 seconds..