[....] 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. [ 30.413641] audit: type=1800 audit(1540364986.056:33): pid=5336 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 [ 30.435315] audit: type=1800 audit(1540364986.056:34): pid=5336 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: [ 35.745708] audit: type=1400 audit(1540364991.386:35): avc: denied { map } for pid=5512 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 '10.128.0.104' (ECDSA) to the list of known hosts. executing program [ 42.476537] audit: type=1400 audit(1540364998.116:36): avc: denied { map } for pid=5526 comm="syz-executor932" path="/root/syz-executor932782276" 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 [ 42.481764] kasan: CONFIG_KASAN_INLINE enabled [ 42.507665] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.515041] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 42.521256] CPU: 1 PID: 5526 Comm: syz-executor932 Not tainted 4.19.0+ #79 [ 42.528246] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.537604] RIP: 0010:rb_erase+0x306/0x3710 [ 42.541910] 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 [ 42.560807] RSP: 0018:ffff8801b4be6918 EFLAGS: 00010202 [ 42.566148] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 42.573405] RDX: 1ffff1003697cd2b RSI: ffffffff8af89820 RDI: 0000000000000008 [ 42.580658] RBP: ffff8801b4be7320 R08: dffffc0000000000 R09: ffffed003697ce53 [ 42.587913] R10: ffffed003697ce53 R11: 0000000000000003 R12: ffff8801b0eea3b0 [ 42.595171] R13: dffffc0000000000 R14: ffff8801b4be72f8 R15: ffff8801b4be7438 [ 42.602428] FS: 0000000001878880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 42.610637] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.616503] CR2: 0000000020000080 CR3: 00000001c5922000 CR4: 00000000001406e0 [ 42.623769] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.631018] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.638288] Call Trace: [ 42.640863] ? rb_insert_color+0x1460/0x1460 [ 42.645256] ? noop_count+0x40/0x40 [ 42.648870] ? print_bfs_bug+0x80/0x80 [ 42.652755] ? mark_held_locks+0x130/0x130 [ 42.656980] ? noop_count+0x40/0x40 [ 42.660590] ? print_bfs_bug+0x80/0x80 [ 42.664456] ? noop_count+0x40/0x40 [ 42.668071] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 42.673591] ? check_usage_forwards+0x3d0/0x3d0 [ 42.678242] ? __bfs+0x321/0x780 [ 42.681592] ? check_usage+0x1aa/0x790 [ 42.685465] ? print_bfs_bug+0x80/0x80 [ 42.689340] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 42.694297] ? check_usage_forwards+0x3d0/0x3d0 [ 42.698962] ? kasan_check_read+0x11/0x20 [ 42.703090] ? graph_lock+0x9c/0x270 [ 42.706798] ? __bfs+0x321/0x780 [ 42.710143] ? trace_event_raw_event_lock_acquire+0x440/0x440 [ 42.716013] ? lockdep_on+0x50/0x50 [ 42.719621] ? print_bfs_bug+0x80/0x80 [ 42.723493] ? kasan_check_read+0x11/0x20 [ 42.727624] ? graph_lock+0x9c/0x270 [ 42.731318] ? trace_event_raw_event_lock_acquire+0x440/0x440 [ 42.737193] ? mark_held_locks+0x130/0x130 [ 42.741411] ? kasan_check_read+0x11/0x20 [ 42.745536] ? __lock_acquire+0x2aff/0x4c20 [ 42.749860] ? mark_held_locks+0x130/0x130 [ 42.754090] ? print_usage_bug+0xc0/0xc0 [ 42.758151] ? print_usage_bug+0xc0/0xc0 [ 42.762202] ? __lock_acquire+0x62f/0x4c20 [ 42.766418] ? zap_class+0x640/0x640 [ 42.770130] ? print_usage_bug+0xc0/0xc0 [ 42.774182] ? __lock_acquire+0x62f/0x4c20 [ 42.778406] ? mark_held_locks+0x130/0x130 [ 42.782621] ? lock_downgrade+0x900/0x900 [ 42.786752] ? ext4_es_scan+0x960/0x960 [ 42.790710] ? kasan_check_read+0x11/0x20 [ 42.794841] ? do_raw_write_lock+0x14f/0x310 [ 42.799234] ? do_raw_write_trylock+0x270/0x270 [ 42.803888] ? lock_acquire+0x1ed/0x520 [ 42.808072] ? integrity_inode_free+0x77/0x320 [ 42.812637] ? ext4_es_remove_extent+0x151/0x500 [ 42.817379] ? kasan_check_read+0x11/0x20 [ 42.821507] ? do_raw_write_lock+0x14f/0x310 [ 42.825896] ? do_raw_read_unlock+0x70/0x70 [ 42.830199] ? zap_class+0x640/0x640 [ 42.833898] integrity_inode_free+0x12f/0x320 [ 42.838380] security_inode_free+0x19/0x90 [ 42.842599] __destroy_inode+0x328/0x820 [ 42.846645] ? clear_nlink+0xe0/0xe0 [ 42.850371] ? evict+0x5d8/0x980 [ 42.853740] ? lock_downgrade+0x900/0x900 [ 42.857870] ? __inode_wait_for_writeback+0x2cf/0x380 [ 42.863043] destroy_inode+0xda/0x200 [ 42.866829] ? __destroy_inode+0x820/0x820 [ 42.871050] evict+0x5e0/0x980 [ 42.874225] ? destroy_inode+0x200/0x200 [ 42.878272] ? iput+0x671/0xa90 [ 42.881532] ? lock_downgrade+0x900/0x900 [ 42.885665] ? kasan_check_read+0x11/0x20 [ 42.889800] ? do_raw_spin_trylock+0x270/0x270 [ 42.894379] ? lock_downgrade+0x900/0x900 [ 42.898515] iput+0x679/0xa90 [ 42.901603] ? inode_add_lru+0x2a0/0x2a0 [ 42.905646] ? up_write+0x7b/0x220 [ 42.909177] ? down_write_nested+0x130/0x130 [ 42.913568] ? down_write_nested+0x130/0x130 [ 42.917958] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.923495] ? check_preemption_disabled+0x48/0x280 [ 42.928499] ext4_ioctl+0x236f/0x4210 [ 42.932286] ? ext4_ioctl_group_add+0x560/0x560 [ 42.936943] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 42.941855] ? kasan_check_read+0x11/0x20 [ 42.945983] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 42.951258] ? rcu_softirq_qs+0x20/0x20 [ 42.955231] ? unwind_dump+0x190/0x190 [ 42.959104] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.964621] ? avc_has_extended_perms+0xab2/0x15a0 [ 42.969552] ? getreg32+0xb7/0xc40 [ 42.973072] ? avc_ss_reset+0x190/0x190 [ 42.977031] ? save_stack+0xa9/0xd0 [ 42.980639] ? save_stack+0x43/0xd0 [ 42.984244] ? __kasan_slab_free+0x102/0x150 [ 42.988633] ? kasan_slab_free+0xe/0x10 [ 42.992589] ? kmem_cache_free+0x83/0x290 [ 42.996718] ? putname+0xf2/0x130 [ 43.000181] ? do_sys_open+0x54d/0x700 [ 43.004051] ? __x64_sys_openat+0x9d/0x100 [ 43.008270] ? do_syscall_64+0x1b9/0x820 [ 43.012314] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 43.017707] ? perf_trace_sched_process_exec+0x860/0x860 [ 43.023138] ? trace_hardirqs_off+0xb8/0x310 [ 43.027536] ? ext4_ioctl_group_add+0x560/0x560 [ 43.032190] do_vfs_ioctl+0x1de/0x1720 [ 43.036060] ? ioctl_preallocate+0x300/0x300 [ 43.040450] ? selinux_file_mprotect+0x620/0x620 [ 43.045191] ? path_mountpoint+0xf11/0x2180 [ 43.049496] ? rcu_read_lock_sched_held+0x14f/0x180 [ 43.054494] ? kmem_cache_free+0x24f/0x290 [ 43.058728] ? putname+0xf7/0x130 [ 43.062172] ? do_syscall_64+0x9a/0x820 [ 43.066144] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.071676] ? security_file_ioctl+0x94/0xc0 [ 43.076066] ksys_ioctl+0xa9/0xd0 [ 43.079503] __x64_sys_ioctl+0x73/0xb0 [ 43.083371] do_syscall_64+0x1b9/0x820 [ 43.087241] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 43.092589] ? syscall_return_slowpath+0x5e0/0x5e0 [ 43.097499] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.102325] ? trace_hardirqs_on_caller+0x310/0x310 [ 43.107329] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 43.112340] ? prepare_exit_to_usermode+0x291/0x3b0 [ 43.117340] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.122171] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 43.127346] RIP: 0033:0x440009 [ 43.130519] 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 [ 43.149402] RSP: 002b:00007ffced21eb88 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 43.157090] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 43.164341] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 43.171592] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 43.178842] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 43.186092] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 43.193350] Modules linked in: [ 43.196602] ---[ end trace 31393f6fa30a21fa ]--- [ 43.201375] RIP: 0010:rb_erase+0x306/0x3710 [ 43.205684] 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 [ 43.224603] RSP: 0018:ffff8801b4be6918 EFLAGS: 00010202 [ 43.229984] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 43.237270] RDX: 1ffff1003697cd2b RSI: ffffffff8af89820 RDI: 0000000000000008 [ 43.244554] RBP: ffff8801b4be7320 R08: dffffc0000000000 R09: ffffed003697ce53 [ 43.251840] R10: ffffed003697ce53 R11: 0000000000000003 R12: ffff8801b0eea3b0 [ 43.259125] R13: dffffc0000000000 R14: ffff8801b4be72f8 R15: ffff8801b4be7438 [ 43.266380] FS: 0000000001878880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 43.274631] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.280527] CR2: 0000000020000080 CR3: 00000001c5922000 CR4: 00000000001406e0 [ 43.287810] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.295079] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.302360] Kernel panic - not syncing: Fatal exception [ 43.308575] Kernel Offset: disabled [ 43.312195] Rebooting in 86400 seconds..