[....] 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. [ 29.954178] audit: type=1800 audit(1539847078.014:33): pid=5325 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 [ 29.976184] audit: type=1800 audit(1539847078.014:34): pid=5325 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: [ 33.201607] audit: type=1400 audit(1539847081.264:35): avc: denied { map } for pid=5502 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 '10.128.0.5' (ECDSA) to the list of known hosts. executing program [ 39.978855] audit: type=1400 audit(1539847088.034:36): avc: denied { map } for pid=5516 comm="syz-executor744" path="/root/syz-executor744248557" 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 [ 39.983752] kasan: CONFIG_KASAN_INLINE enabled [ 40.009854] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 40.017350] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 40.023571] CPU: 1 PID: 5516 Comm: syz-executor744 Not tainted 4.19.0-rc8+ #67 [ 40.030908] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.040252] RIP: 0010:rb_erase+0x306/0x3710 [ 40.044554] 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 [ 40.063439] RSP: 0018:ffff8801bcf2e918 EFLAGS: 00010202 [ 40.068780] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 40.076029] RDX: 1ffff100379e5d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 40.083280] RBP: ffff8801bcf2f320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 40.090527] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801ba8015b0 [ 40.097779] R13: dffffc0000000000 R14: ffff8801bcf2f2f8 R15: ffff8801bcf2f438 [ 40.105032] FS: 00000000020d5880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 40.113245] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.119109] CR2: 0000000020000080 CR3: 00000001c6684000 CR4: 00000000001406e0 [ 40.126362] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.133613] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.140860] Call Trace: [ 40.143436] ? lockdep_on+0x50/0x50 [ 40.147047] ? rb_insert_color+0x1460/0x1460 [ 40.151439] ? noop_count+0x40/0x40 [ 40.155049] ? lock_pin_lock+0x350/0x350 [ 40.159090] ? mark_held_locks+0x130/0x130 [ 40.163310] ? kasan_check_read+0x11/0x20 [ 40.167441] ? noop_count+0x40/0x40 [ 40.171050] ? lock_pin_lock+0x350/0x350 [ 40.175110] ? mark_held_locks+0x130/0x130 [ 40.179328] ? check_usage_forwards+0x3e0/0x3e0 [ 40.183981] ? __bfs+0x385/0x7a0 [ 40.187326] ? noop_count+0x40/0x40 [ 40.190936] ? check_usage+0x1a9/0x790 [ 40.194802] ? lock_pin_lock+0x350/0x350 [ 40.198846] ? check_usage_forwards+0x3e0/0x3e0 [ 40.203499] ? __bfs+0x385/0x7a0 [ 40.206850] ? modules_open+0xa0/0xa0 [ 40.210634] ? lockdep_on+0x50/0x50 [ 40.214241] ? lock_pin_lock+0x350/0x350 [ 40.218286] ? mark_held_locks+0x130/0x130 [ 40.222503] ? kasan_check_read+0x11/0x20 [ 40.226630] ? __lock_acquire+0x2881/0x4ec0 [ 40.230937] ? mark_held_locks+0x130/0x130 [ 40.235161] ? print_usage_bug+0xc0/0xc0 [ 40.239205] ? _raw_spin_unlock+0x2c/0x50 [ 40.243335] ? graph_lock+0x170/0x170 [ 40.247118] ? ext4_exit_mballoc+0xc0/0xc0 [ 40.251345] ? __lock_acquire+0x7ec/0x4ec0 [ 40.255562] ? find_held_lock+0x36/0x1c0 [ 40.259606] ? mark_held_locks+0x130/0x130 [ 40.263820] ? lock_downgrade+0x900/0x900 [ 40.267951] ? ext4_es_scan+0x960/0x960 [ 40.271905] ? lock_release+0x970/0x970 [ 40.275861] ? do_raw_write_trylock+0x1c0/0x1c0 [ 40.280511] ? kasan_check_write+0x14/0x20 [ 40.284727] ? lock_acquire+0x1ed/0x520 [ 40.288703] ? integrity_inode_free+0x77/0x320 [ 40.293267] ? ext4_es_remove_extent+0x151/0x500 [ 40.298004] ? lock_release+0x970/0x970 [ 40.301961] ? kasan_check_write+0x14/0x20 [ 40.306181] ? do_raw_write_lock+0xbd/0x1b0 [ 40.310482] integrity_inode_free+0x12f/0x320 [ 40.314964] security_inode_free+0x19/0x90 [ 40.319185] __destroy_inode+0x328/0x820 [ 40.323231] ? generic_update_time+0x450/0x450 [ 40.327793] ? evict+0x5d8/0x980 [ 40.331156] ? lock_downgrade+0x900/0x900 [ 40.335292] ? __inode_wait_for_writeback+0x2cf/0x380 [ 40.340463] destroy_inode+0xda/0x200 [ 40.344245] ? __destroy_inode+0x820/0x820 [ 40.348462] ? kasan_check_write+0x14/0x20 [ 40.352684] ? do_raw_spin_lock+0xc1/0x200 [ 40.356902] evict+0x5e0/0x980 [ 40.360081] ? destroy_inode+0x200/0x200 [ 40.364123] ? iput+0x671/0xa90 [ 40.367386] ? lock_downgrade+0x900/0x900 [ 40.371514] ? kasan_check_read+0x11/0x20 [ 40.375658] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 40.380228] ? lock_downgrade+0x900/0x900 [ 40.384358] iput+0x679/0xa90 [ 40.387444] ? inode_add_lru+0x2a0/0x2a0 [ 40.391487] ? up_write+0x7b/0x220 [ 40.395007] ? up_read+0x110/0x110 [ 40.398524] ? up_read+0x110/0x110 [ 40.402050] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.407571] ? check_preemption_disabled+0x48/0x200 [ 40.412572] ext4_ioctl+0x236f/0x4210 [ 40.416358] ? ext4_ioctl_group_add+0x560/0x560 [ 40.421012] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 40.426790] ? kasan_check_read+0x11/0x20 [ 40.430920] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 40.436182] ? rcu_bh_qs+0xc0/0xc0 [ 40.439706] ? unwind_dump+0x190/0x190 [ 40.443579] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.449098] ? avc_has_extended_perms+0xab2/0x15a0 [ 40.454014] ? convert_from_fxsr+0x4a7/0x7d0 [ 40.458404] ? avc_ss_reset+0x190/0x190 [ 40.462370] ? save_stack+0xa9/0xd0 [ 40.465975] ? save_stack+0x43/0xd0 [ 40.469581] ? __kasan_slab_free+0x102/0x150 [ 40.473970] ? kasan_slab_free+0xe/0x10 [ 40.477928] ? kmem_cache_free+0x83/0x290 [ 40.482060] ? putname+0xf2/0x130 [ 40.485611] ? do_sys_open+0x54d/0x700 [ 40.489479] ? __x64_sys_openat+0x9d/0x100 [ 40.493701] ? do_syscall_64+0x1b9/0x820 [ 40.497759] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.503109] ? ___might_sleep+0x1ed/0x300 [ 40.507242] ? arch_local_save_flags+0x40/0x40 [ 40.511804] ? kasan_check_write+0x14/0x20 [ 40.516023] ? trace_hardirqs_off+0xb8/0x310 [ 40.520414] ? ext4_ioctl_group_add+0x560/0x560 [ 40.525066] do_vfs_ioctl+0x1de/0x1720 [ 40.528934] ? ioctl_preallocate+0x300/0x300 [ 40.533329] ? selinux_file_mprotect+0x620/0x620 [ 40.538067] ? path_openat+0x3981/0x5160 [ 40.542125] ? rcu_read_lock_sched_held+0x108/0x120 [ 40.547137] ? kmem_cache_free+0x24f/0x290 [ 40.551356] ? putname+0xf7/0x130 [ 40.554795] ? do_syscall_64+0x9a/0x820 [ 40.558750] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.564272] ? security_file_ioctl+0x94/0xc0 [ 40.568663] ksys_ioctl+0xa9/0xd0 [ 40.572102] __x64_sys_ioctl+0x73/0xb0 [ 40.575970] do_syscall_64+0x1b9/0x820 [ 40.579840] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 40.585187] ? syscall_return_slowpath+0x5e0/0x5e0 [ 40.590094] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.594921] ? trace_hardirqs_on_caller+0x310/0x310 [ 40.599934] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 40.604933] ? prepare_exit_to_usermode+0x291/0x3b0 [ 40.609930] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.614762] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.619936] RIP: 0033:0x440009 [ 40.623112] 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 [ 40.641999] RSP: 002b:00007fffdfaee978 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 40.649693] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 40.656944] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 40.664193] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 40.671441] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 40.678692] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 40.685948] Modules linked in: [ 40.689187] ---[ end trace fd9e21de67912451 ]--- [ 40.693966] RIP: 0010:rb_erase+0x306/0x3710 [ 40.698276] 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 [ 40.717201] RSP: 0018:ffff8801bcf2e918 EFLAGS: 00010202 [ 40.722582] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 40.729834] RDX: 1ffff100379e5d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 40.737120] RBP: ffff8801bcf2f320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 40.744416] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801ba8015b0 [ 40.751707] R13: dffffc0000000000 R14: ffff8801bcf2f2f8 R15: ffff8801bcf2f438 [ 40.758976] FS: 00000000020d5880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 40.767216] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.773110] CR2: 0000000020000080 CR3: 00000001c6684000 CR4: 00000000001406e0 [ 40.780378] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.787660] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.794952] Kernel panic - not syncing: Fatal exception [ 40.801230] Kernel Offset: disabled [ 40.804857] Rebooting in 86400 seconds..