[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting O[ 30.890854] audit: type=1800 audit(1540081106.051:33): pid=5342 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 penBSD Secure Shell server: sshd[ 30.914267] audit: type=1800 audit(1540081106.051:34): pid=5342 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 [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 38.856114] audit: type=1400 audit(1540081114.021:35): avc: denied { map } for pid=5518 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 '10.128.0.50' (ECDSA) to the list of known hosts. executing program [ 49.942641] audit: type=1400 audit(1540081125.101:36): avc: denied { map } for pid=5531 comm="syz-executor864" path="/root/syz-executor864876861" 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 [ 49.948114] kasan: CONFIG_KASAN_INLINE enabled [ 49.973839] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 49.981258] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 49.987487] CPU: 0 PID: 5531 Comm: syz-executor864 Not tainted 4.19.0-rc8+ #73 [ 49.994838] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.004201] RIP: 0010:rb_erase+0x306/0x3710 [ 50.008511] 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 [ 50.027435] RSP: 0018:ffff8801d955e918 EFLAGS: 00010202 [ 50.032808] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 50.040091] RDX: 1ffff1003b2abd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 50.047360] RBP: ffff8801d955f320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 50.054618] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b07183b0 [ 50.061874] R13: dffffc0000000000 R14: ffff8801d955f2f8 R15: ffff8801d955f438 [ 50.069128] FS: 00000000025a9880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 50.077339] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.083221] CR2: 0000000020000080 CR3: 00000001d22c1000 CR4: 00000000001406f0 [ 50.090484] Call Trace: [ 50.093060] ? lockdep_on+0x50/0x50 [ 50.096677] ? rb_insert_color+0x1460/0x1460 [ 50.101072] ? noop_count+0x40/0x40 [ 50.104683] ? lock_pin_lock+0x350/0x350 [ 50.108729] ? mark_held_locks+0x130/0x130 [ 50.112953] ? kasan_check_read+0x11/0x20 [ 50.117090] ? noop_count+0x40/0x40 [ 50.120704] ? lock_pin_lock+0x350/0x350 [ 50.124762] ? mark_held_locks+0x130/0x130 [ 50.129002] ? check_usage_forwards+0x3e0/0x3e0 [ 50.133655] ? __bfs+0x385/0x7a0 [ 50.137005] ? noop_count+0x40/0x40 [ 50.140617] ? check_usage+0x1a9/0x790 [ 50.144486] ? lock_pin_lock+0x350/0x350 [ 50.148533] ? check_usage_forwards+0x3e0/0x3e0 [ 50.153215] ? __bfs+0x385/0x7a0 [ 50.156576] ? modules_open+0xa0/0xa0 [ 50.160361] ? lockdep_on+0x50/0x50 [ 50.163974] ? lock_pin_lock+0x350/0x350 [ 50.168023] ? mark_held_locks+0x130/0x130 [ 50.172248] ? kasan_check_read+0x11/0x20 [ 50.176394] ? __lock_acquire+0x2881/0x4ec0 [ 50.180707] ? mark_held_locks+0x130/0x130 [ 50.184941] ? print_usage_bug+0xc0/0xc0 [ 50.188990] ? _raw_spin_unlock+0x2c/0x50 [ 50.193124] ? graph_lock+0x170/0x170 [ 50.196913] ? ext4_exit_mballoc+0xc0/0xc0 [ 50.201134] ? __lock_acquire+0x7ec/0x4ec0 [ 50.205354] ? find_held_lock+0x36/0x1c0 [ 50.209402] ? mark_held_locks+0x130/0x130 [ 50.213637] ? lock_downgrade+0x900/0x900 [ 50.217792] ? ext4_es_scan+0x960/0x960 [ 50.221750] ? lock_release+0x970/0x970 [ 50.225723] ? do_raw_write_trylock+0x1c0/0x1c0 [ 50.230379] ? kasan_check_write+0x14/0x20 [ 50.234599] ? lock_acquire+0x1ed/0x520 [ 50.238595] ? integrity_inode_free+0x77/0x320 [ 50.243182] ? ext4_es_remove_extent+0x151/0x500 [ 50.247954] ? lock_release+0x970/0x970 [ 50.251915] ? kasan_check_write+0x14/0x20 [ 50.256137] ? do_raw_write_lock+0xbd/0x1e0 [ 50.260460] integrity_inode_free+0x12f/0x320 [ 50.264939] security_inode_free+0x19/0x90 [ 50.269179] __destroy_inode+0x328/0x820 [ 50.273240] ? generic_update_time+0x450/0x450 [ 50.277808] ? evict+0x5d8/0x980 [ 50.281169] ? lock_downgrade+0x900/0x900 [ 50.285312] ? __inode_wait_for_writeback+0x2cf/0x380 [ 50.290489] destroy_inode+0xda/0x200 [ 50.294274] ? __destroy_inode+0x820/0x820 [ 50.298493] ? kasan_check_write+0x14/0x20 [ 50.302714] ? do_raw_spin_lock+0xc1/0x230 [ 50.306959] evict+0x5e0/0x980 [ 50.310151] ? destroy_inode+0x200/0x200 [ 50.314208] ? iput+0x671/0xa90 [ 50.317475] ? lock_downgrade+0x900/0x900 [ 50.321622] ? kasan_check_read+0x11/0x20 [ 50.325758] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 50.330344] ? lock_downgrade+0x900/0x900 [ 50.334482] iput+0x679/0xa90 [ 50.337575] ? inode_add_lru+0x2a0/0x2a0 [ 50.341619] ? up_write+0x7b/0x220 [ 50.345141] ? up_read+0x110/0x110 [ 50.348665] ? up_read+0x110/0x110 [ 50.352197] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.357726] ? check_preemption_disabled+0x48/0x280 [ 50.362755] ext4_ioctl+0x236f/0x4210 [ 50.366552] ? ext4_ioctl_group_add+0x560/0x560 [ 50.371209] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 50.377005] ? kasan_check_read+0x11/0x20 [ 50.381169] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 50.386438] ? rcu_bh_qs+0xc0/0xc0 [ 50.389961] ? unwind_dump+0x190/0x190 [ 50.393847] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.399372] ? avc_has_extended_perms+0xab2/0x15a0 [ 50.404291] ? convert_from_fxsr+0x157/0x7d0 [ 50.408682] ? avc_ss_reset+0x190/0x190 [ 50.412896] ? save_stack+0xa9/0xd0 [ 50.416525] ? save_stack+0x43/0xd0 [ 50.420140] ? __kasan_slab_free+0x102/0x150 [ 50.424561] ? kasan_slab_free+0xe/0x10 [ 50.428531] ? kmem_cache_free+0x83/0x290 [ 50.432665] ? putname+0xf2/0x130 [ 50.436123] ? do_sys_open+0x54d/0x700 [ 50.439994] ? __x64_sys_openat+0x9d/0x100 [ 50.444231] ? do_syscall_64+0x1b9/0x820 [ 50.448298] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.453662] ? ___might_sleep+0x1ed/0x300 [ 50.457796] ? arch_local_save_flags+0x40/0x40 [ 50.462380] ? kasan_check_write+0x14/0x20 [ 50.466603] ? trace_hardirqs_off+0xb8/0x310 [ 50.471018] ? ext4_ioctl_group_add+0x560/0x560 [ 50.475675] do_vfs_ioctl+0x1de/0x1720 [ 50.479551] ? ioctl_preallocate+0x300/0x300 [ 50.483972] ? selinux_file_mprotect+0x620/0x620 [ 50.488719] ? path_openat+0x3a31/0x5160 [ 50.492775] ? rcu_read_lock_sched_held+0x108/0x120 [ 50.497790] ? kmem_cache_free+0x24f/0x290 [ 50.502022] ? putname+0xf7/0x130 [ 50.505465] ? do_syscall_64+0x9a/0x820 [ 50.509443] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.514984] ? security_file_ioctl+0x94/0xc0 [ 50.519427] ksys_ioctl+0xa9/0xd0 [ 50.522869] __x64_sys_ioctl+0x73/0xb0 [ 50.526742] do_syscall_64+0x1b9/0x820 [ 50.530611] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 50.535960] ? syscall_return_slowpath+0x5e0/0x5e0 [ 50.540872] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.545709] ? trace_hardirqs_on_caller+0x310/0x310 [ 50.550710] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 50.555723] ? prepare_exit_to_usermode+0x291/0x3b0 [ 50.560725] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.565555] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.570737] RIP: 0033:0x440009 [ 50.573915] 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 [ 50.592803] RSP: 002b:00007fff24086268 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 50.600498] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 50.607792] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 50.615046] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 50.622302] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 50.629566] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 50.636823] Modules linked in: [ 50.641663] ---[ end trace 7565e62c58b3a44f ]--- [ 50.646769] RIP: 0010:rb_erase+0x306/0x3710 [ 50.651084] 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 [ 50.670034] RSP: 0018:ffff8801d955e918 EFLAGS: 00010202 [ 50.675420] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 50.682687] RDX: 1ffff1003b2abd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 50.690003] RBP: ffff8801d955f320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 50.697312] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b07183b0 [ 50.704616] R13: dffffc0000000000 R14: ffff8801d955f2f8 R15: ffff8801d955f438 [ 50.711893] FS: 00000000025a9880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 50.720171] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.726080] CR2: 0000000020000080 CR3: 00000001d22c1000 CR4: 00000000001406f0 [ 50.733402] Kernel panic - not syncing: Fatal exception [ 50.739567] Kernel Offset: disabled [ 50.743279] Rebooting in 86400 seconds..