[....] 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 29.597985] audit: type=1800 audit(1538153325.724:33): pid=5305 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 [ 29.619201] audit: type=1800 audit(1538153325.734:34): pid=5305 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: [ 34.067476] audit: type=1400 audit(1538153330.194:35): avc: denied { map } for pid=5480 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 '10.128.0.57' (ECDSA) to the list of known hosts. executing program [ 41.579492] audit: type=1400 audit(1538153337.704:36): avc: denied { map } for pid=5494 comm="syz-executor723" path="/root/syz-executor723407641" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 41.584765] kasan: CONFIG_KASAN_INLINE enabled [ 41.610840] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 41.618204] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 41.624518] CPU: 0 PID: 5494 Comm: syz-executor723 Not tainted 4.19.0-rc5+ #37 [ 41.631924] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.641287] RIP: 0010:rb_erase+0x306/0x3710 [ 41.645594] 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 [ 41.664482] RSP: 0018:ffff8801c02a6918 EFLAGS: 00010202 [ 41.669825] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 41.677125] RDX: 1ffff10038054d2b RSI: ffffffff8b5a08a0 RDI: 0000000000000008 [ 41.684393] RBP: ffff8801c02a7320 R08: dffffc0000000000 R09: fffffbfff135d5c8 [ 41.691650] R10: fffffbfff135d5c8 R11: ffffffff89aeae43 R12: ffff8801b263a3f0 [ 41.698901] R13: dffffc0000000000 R14: ffff8801c02a72f8 R15: ffff8801c02a7438 [ 41.706241] FS: 00000000015d4880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 41.714447] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.720360] CR2: 0000000020000080 CR3: 00000001c53a9000 CR4: 00000000001406f0 [ 41.727648] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.734902] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.742154] Call Trace: [ 41.744729] ? lockdep_on+0x50/0x50 [ 41.748389] ? rb_insert_color+0x1460/0x1460 [ 41.752794] ? noop_count+0x40/0x40 [ 41.756409] ? lock_pin_lock+0x350/0x350 [ 41.760457] ? noop_count+0x40/0x40 [ 41.764082] ? kasan_check_read+0x11/0x20 [ 41.768210] ? noop_count+0x40/0x40 [ 41.771825] ? noop_count+0x40/0x40 [ 41.775433] ? lock_pin_lock+0x350/0x350 [ 41.779474] ? mark_held_locks+0x130/0x130 [ 41.783749] ? check_usage_forwards+0x3e0/0x3e0 [ 41.788405] ? __bfs+0x385/0x7a0 [ 41.791756] ? noop_count+0x40/0x40 [ 41.795536] ? check_usage+0x1a9/0x790 [ 41.799459] ? lock_pin_lock+0x350/0x350 [ 41.803560] ? check_usage_forwards+0x3e0/0x3e0 [ 41.808261] ? __bfs+0x385/0x7a0 [ 41.811627] ? __lock_acquire+0x7ec/0x4ec0 [ 41.815885] ? lockdep_on+0x50/0x50 [ 41.819604] ? lock_pin_lock+0x350/0x350 [ 41.823655] ? mark_held_locks+0x130/0x130 [ 41.827943] ? kasan_check_read+0x11/0x20 [ 41.832080] ? __lock_acquire+0x2881/0x4ec0 [ 41.836390] ? mark_held_locks+0x130/0x130 [ 41.840608] ? print_usage_bug+0xc0/0xc0 [ 41.844657] ? _raw_spin_unlock+0x2c/0x50 [ 41.848786] ? graph_lock+0x170/0x170 [ 41.852586] ? ext4_exit_mballoc+0xc0/0xc0 [ 41.856805] ? __lock_acquire+0x7ec/0x4ec0 [ 41.861024] ? find_held_lock+0x36/0x1c0 [ 41.865067] ? mark_held_locks+0x130/0x130 [ 41.869285] ? lock_downgrade+0x900/0x900 [ 41.873554] ? ext4_es_scan+0x960/0x960 [ 41.877515] ? do_raw_write_trylock+0x1c0/0x1c0 [ 41.882177] ? kasan_check_write+0x14/0x20 [ 41.886399] ? lock_acquire+0x1ed/0x520 [ 41.890356] ? integrity_inode_free+0x77/0x320 [ 41.894924] ? ext4_es_remove_extent+0x151/0x500 [ 41.899769] ? lock_release+0x970/0x970 [ 41.903734] ? kasan_check_write+0x14/0x20 [ 41.907952] ? do_raw_write_lock+0xbd/0x1b0 [ 41.912257] integrity_inode_free+0x12f/0x320 [ 41.916816] security_inode_free+0x19/0x90 [ 41.921044] __destroy_inode+0x328/0x820 [ 41.925088] ? generic_update_time+0x450/0x450 [ 41.929764] ? evict+0x5d8/0x980 [ 41.933117] ? lock_downgrade+0x900/0x900 [ 41.937252] ? __inode_wait_for_writeback+0x2cf/0x380 [ 41.942432] destroy_inode+0xda/0x200 [ 41.946264] ? __destroy_inode+0x820/0x820 [ 41.950494] ? kasan_check_write+0x14/0x20 [ 41.954731] ? do_raw_spin_lock+0xc1/0x200 [ 41.958951] evict+0x5e0/0x980 [ 41.962168] ? destroy_inode+0x200/0x200 [ 41.966224] ? iput+0x671/0xa90 [ 41.969562] ? lock_downgrade+0x900/0x900 [ 41.973704] ? kasan_check_read+0x11/0x20 [ 41.977842] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 41.982412] ? lock_downgrade+0x900/0x900 [ 41.986558] iput+0x679/0xa90 [ 41.989646] ? inode_add_lru+0x2a0/0x2a0 [ 41.993712] ? up_write+0x7b/0x220 [ 41.997234] ? up_read+0x110/0x110 [ 42.000756] ? up_read+0x110/0x110 [ 42.004343] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.009875] ? check_preemption_disabled+0x48/0x200 [ 42.014881] ext4_ioctl+0x236f/0x4210 [ 42.018672] ? ext4_ioctl_group_add+0x560/0x560 [ 42.023339] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 42.029120] ? kasan_check_read+0x11/0x20 [ 42.033352] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 42.038622] ? rcu_bh_qs+0xc0/0xc0 [ 42.042154] ? unwind_dump+0x190/0x190 [ 42.046027] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.051547] ? avc_has_extended_perms+0xab2/0x15a0 [ 42.056467] ? regset_tls_active+0x67/0xc0 [ 42.060752] ? avc_ss_reset+0x190/0x190 [ 42.064723] ? save_stack+0xa9/0xd0 [ 42.068331] ? save_stack+0x43/0xd0 [ 42.071937] ? __kasan_slab_free+0x102/0x150 [ 42.076401] ? kasan_slab_free+0xe/0x10 [ 42.080364] ? kmem_cache_free+0x83/0x290 [ 42.084493] ? putname+0xf2/0x130 [ 42.087932] ? do_sys_open+0x54d/0x700 [ 42.091800] ? __x64_sys_openat+0x9d/0x100 [ 42.096025] ? do_syscall_64+0x1b9/0x820 [ 42.100077] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.105438] ? ___might_sleep+0x1ed/0x300 [ 42.109568] ? arch_local_save_flags+0x40/0x40 [ 42.114132] ? kasan_check_write+0x14/0x20 [ 42.118350] ? trace_hardirqs_off+0xb8/0x310 [ 42.122859] ? ext4_ioctl_group_add+0x560/0x560 [ 42.127514] do_vfs_ioctl+0x1de/0x1720 [ 42.131508] ? ioctl_preallocate+0x300/0x300 [ 42.135913] ? selinux_file_mprotect+0x620/0x620 [ 42.140657] ? path_lookupat.isra.43+0x2e1/0xc00 [ 42.145421] ? rcu_read_lock_sched_held+0x108/0x120 [ 42.150424] ? kmem_cache_free+0x24f/0x290 [ 42.154643] ? putname+0xf7/0x130 [ 42.158083] ? do_syscall_64+0x9a/0x820 [ 42.162155] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.167683] ? security_file_ioctl+0x94/0xc0 [ 42.172119] ksys_ioctl+0xa9/0xd0 [ 42.175562] __x64_sys_ioctl+0x73/0xb0 [ 42.179500] do_syscall_64+0x1b9/0x820 [ 42.183380] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 42.188727] ? syscall_return_slowpath+0x5e0/0x5e0 [ 42.193643] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.198480] ? trace_hardirqs_on_caller+0x310/0x310 [ 42.203490] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 42.208510] ? prepare_exit_to_usermode+0x291/0x3b0 [ 42.213529] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.218362] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.223535] RIP: 0033:0x440089 [ 42.226719] 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 [ 42.245614] RSP: 002b:00007ffd2f850b18 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 42.253310] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 42.260571] RDX: 0000000000440089 RSI: 0000000000006611 RDI: 0000000000000003 [ 42.267835] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 42.275090] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 42.282345] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 42.289606] Modules linked in: [ 42.292968] ---[ end trace f8bc43fb5a5d0c07 ]--- [ 42.297748] RIP: 0010:rb_erase+0x306/0x3710 [ 42.302113] 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 [ 42.321206] RSP: 0018:ffff8801c02a6918 EFLAGS: 00010202 [ 42.326565] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 42.333863] RDX: 1ffff10038054d2b RSI: ffffffff8b5a08a0 RDI: 0000000000000008 [ 42.341156] RBP: ffff8801c02a7320 R08: dffffc0000000000 R09: fffffbfff135d5c8 [ 42.348471] R10: fffffbfff135d5c8 R11: ffffffff89aeae43 R12: ffff8801b263a3f0 [ 42.355842] R13: dffffc0000000000 R14: ffff8801c02a72f8 R15: ffff8801c02a7438 [ 42.363137] FS: 00000000015d4880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 42.371395] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.377286] CR2: 0000000020000080 CR3: 00000001c53a9000 CR4: 00000000001406f0 [ 42.384590] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.391884] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.399148] Kernel panic - not syncing: Fatal exception [ 42.405500] Kernel Offset: disabled [ 42.409126] Rebooting in 86400 seconds..