[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 28.752547] kauditd_printk_skb: 9 callbacks suppressed [ 28.752559] audit: type=1800 audit(1540023628.913:33): pid=5296 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 [ 28.787482] audit: type=1800 audit(1540023628.913:34): pid=5296 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 [ 29.446509] audit: type=1400 audit(1540023629.613:35): avc: denied { map } for pid=5470 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 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.68' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 52.571588] audit: type=1400 audit(1540023652.733:36): avc: denied { map } for pid=5486 comm="syz-executor604" path="/root/syz-executor604025535" 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 [ 52.578192] kasan: CONFIG_KASAN_INLINE enabled [ 52.602560] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 52.610044] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 52.616266] CPU: 1 PID: 5486 Comm: syz-executor604 Not tainted 4.19.0-rc8+ #71 [ 52.623610] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.632958] RIP: 0010:rb_erase+0x306/0x3710 [ 52.637375] 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 [ 52.656383] RSP: 0018:ffff8801c5a46918 EFLAGS: 00010202 [ 52.661729] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 52.668983] RDX: 1ffff10038b48d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 52.676238] RBP: ffff8801c5a47320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 52.683571] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b02ce3b0 [ 52.690831] R13: dffffc0000000000 R14: ffff8801c5a472f8 R15: ffff8801c5a47438 [ 52.698085] FS: 00000000020ba880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 52.706290] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.712150] CR2: 0000000020000080 CR3: 00000001d97cd000 CR4: 00000000001406e0 [ 52.719409] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.726658] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.733908] Call Trace: [ 52.736484] ? lockdep_on+0x50/0x50 [ 52.740092] ? rb_insert_color+0x1460/0x1460 [ 52.744482] ? noop_count+0x40/0x40 [ 52.748089] ? lock_pin_lock+0x350/0x350 [ 52.752239] ? mark_held_locks+0x130/0x130 [ 52.756462] ? kasan_check_read+0x11/0x20 [ 52.760592] ? noop_count+0x40/0x40 [ 52.764204] ? lock_pin_lock+0x350/0x350 [ 52.768248] ? mark_held_locks+0x130/0x130 [ 52.772464] ? check_usage_forwards+0x3e0/0x3e0 [ 52.777117] ? __bfs+0x385/0x7a0 [ 52.780463] ? noop_count+0x40/0x40 [ 52.784077] ? check_usage+0x1a9/0x790 [ 52.787947] ? lock_pin_lock+0x350/0x350 [ 52.791995] ? check_usage_forwards+0x3e0/0x3e0 [ 52.796649] ? __bfs+0x385/0x7a0 [ 52.799996] ? lockdep_on+0x50/0x50 [ 52.803709] ? lock_pin_lock+0x350/0x350 [ 52.807764] ? mark_held_locks+0x130/0x130 [ 52.811981] ? kasan_check_read+0x11/0x20 [ 52.816110] ? __lock_acquire+0x2881/0x4ec0 [ 52.820417] ? mark_held_locks+0x130/0x130 [ 52.824647] ? print_usage_bug+0xc0/0xc0 [ 52.828719] ? _raw_spin_unlock+0x2c/0x50 [ 52.832847] ? graph_lock+0x170/0x170 [ 52.836630] ? ext4_exit_mballoc+0xc0/0xc0 [ 52.840848] ? __lock_acquire+0x7ec/0x4ec0 [ 52.845068] ? find_held_lock+0x36/0x1c0 [ 52.849137] ? mark_held_locks+0x130/0x130 [ 52.853371] ? lock_downgrade+0x900/0x900 [ 52.857503] ? ext4_es_scan+0x960/0x960 [ 52.861472] ? lock_release+0x970/0x970 [ 52.865434] ? do_raw_write_trylock+0x1c0/0x1c0 [ 52.870085] ? kasan_check_write+0x14/0x20 [ 52.874301] ? lock_acquire+0x1ed/0x520 [ 52.878257] ? integrity_inode_free+0x77/0x320 [ 52.882936] ? ext4_es_remove_extent+0x151/0x500 [ 52.887681] ? lock_release+0x970/0x970 [ 52.891640] ? kasan_check_write+0x14/0x20 [ 52.895856] ? do_raw_write_lock+0xbd/0x1b0 [ 52.900168] integrity_inode_free+0x12f/0x320 [ 52.904664] security_inode_free+0x19/0x90 [ 52.908925] __destroy_inode+0x328/0x820 [ 52.912974] ? generic_update_time+0x450/0x450 [ 52.917541] ? evict+0x5d8/0x980 [ 52.920918] ? lock_downgrade+0x900/0x900 [ 52.925054] ? __inode_wait_for_writeback+0x2cf/0x380 [ 52.930237] destroy_inode+0xda/0x200 [ 52.934019] ? __destroy_inode+0x820/0x820 [ 52.938236] ? kasan_check_write+0x14/0x20 [ 52.942548] ? do_raw_spin_lock+0xc1/0x200 [ 52.946773] evict+0x5e0/0x980 [ 52.949948] ? destroy_inode+0x200/0x200 [ 52.953990] ? iput+0x671/0xa90 [ 52.957257] ? lock_downgrade+0x900/0x900 [ 52.961396] ? kasan_check_read+0x11/0x20 [ 52.965531] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 52.970095] ? lock_downgrade+0x900/0x900 [ 52.974224] iput+0x679/0xa90 [ 52.977311] ? inode_add_lru+0x2a0/0x2a0 [ 52.981355] ? up_write+0x7b/0x220 [ 52.984874] ? up_read+0x110/0x110 [ 52.988409] ? up_read+0x110/0x110 [ 52.992050] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.997574] ? check_preemption_disabled+0x48/0x200 [ 53.002616] ext4_ioctl+0x236f/0x4210 [ 53.006410] ? ext4_ioctl_group_add+0x560/0x560 [ 53.011067] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 53.016844] ? kasan_check_read+0x11/0x20 [ 53.020975] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 53.026236] ? rcu_bh_qs+0xc0/0xc0 [ 53.029764] ? unwind_dump+0x190/0x190 [ 53.033632] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.039151] ? avc_has_extended_perms+0xab2/0x15a0 [ 53.044075] ? convert_from_fxsr+0x4a7/0x7d0 [ 53.048466] ? avc_ss_reset+0x190/0x190 [ 53.052424] ? graph_lock+0x170/0x170 [ 53.056208] ? save_stack+0xa9/0xd0 [ 53.059816] ? find_held_lock+0x36/0x1c0 [ 53.063863] ? ___might_sleep+0x1ed/0x300 [ 53.067997] ? arch_local_save_flags+0x40/0x40 [ 53.072569] ? trace_hardirqs_off+0xb8/0x310 [ 53.077130] ? ext4_ioctl_group_add+0x560/0x560 [ 53.081781] do_vfs_ioctl+0x1de/0x1720 [ 53.085653] ? ioctl_preallocate+0x300/0x300 [ 53.090045] ? selinux_file_mprotect+0x620/0x620 [ 53.094801] ? path_openat+0x3d01/0x5160 [ 53.098850] ? rcu_read_lock_sched_held+0x108/0x120 [ 53.103854] ? kmem_cache_free+0x24f/0x290 [ 53.108080] ? putname+0xf7/0x130 [ 53.111519] ? do_syscall_64+0x9a/0x820 [ 53.115481] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.121005] ? security_file_ioctl+0x94/0xc0 [ 53.125398] ksys_ioctl+0xa9/0xd0 [ 53.128851] __x64_sys_ioctl+0x73/0xb0 [ 53.132744] do_syscall_64+0x1b9/0x820 [ 53.136618] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 53.141966] ? syscall_return_slowpath+0x5e0/0x5e0 [ 53.146879] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 53.151824] ? trace_hardirqs_on_caller+0x310/0x310 [ 53.156827] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 53.161858] ? prepare_exit_to_usermode+0x291/0x3b0 [ 53.166860] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 53.171696] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.176880] RIP: 0033:0x440009 [ 53.180058] 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 [ 53.199198] RSP: 002b:00007ffed9dd3a88 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 53.207501] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 53.214765] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 53.222029] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 53.229281] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 53.236531] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 53.243800] Modules linked in: [ 53.247093] ---[ end trace 6ef9ec1d8e8b75bf ]--- [ 53.251856] RIP: 0010:rb_erase+0x306/0x3710 [ 53.256208] 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 [ 53.275136] RSP: 0018:ffff8801c5a46918 EFLAGS: 00010202 [ 53.280496] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 53.287780] RDX: 1ffff10038b48d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 53.295089] RBP: ffff8801c5a47320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 53.302349] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b02ce3b0 [ 53.309646] R13: dffffc0000000000 R14: ffff8801c5a472f8 R15: ffff8801c5a47438 [ 53.316936] FS: 00000000020ba880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 53.325279] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 53.331156] CR2: 0000000020000080 CR3: 00000001d97cd000 CR4: 00000000001406e0 [ 53.338450] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 53.345749] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 53.353013] Kernel panic - not syncing: Fatal exception [ 53.359284] Kernel Offset: disabled [ 53.362908] Rebooting in 86400 seconds..