[....] 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[ 29.897061] audit: type=1800 audit(1538348236.813:33): pid=5285 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 [?25l[?1c7[ ok [39;[ 29.920176] audit: type=1800 audit(1538348236.813:34): pid=5285 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 49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 34.740845] audit: type=1400 audit(1538348241.653:35): avc: denied { map } for pid=5464 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 '10.128.10.5' (ECDSA) to the list of known hosts. executing program [ 41.257233] audit: type=1400 audit(1538348248.173:36): avc: denied { map } for pid=5478 comm="syz-executor245" path="/root/syz-executor245082630" 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 [ 41.262717] kasan: CONFIG_KASAN_INLINE enabled [ 41.288363] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 41.295981] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 41.302219] CPU: 0 PID: 5478 Comm: syz-executor245 Not tainted 4.19.0-rc6+ #41 [ 41.309558] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.318907] RIP: 0010:rb_erase+0x306/0x3710 [ 41.323213] 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 [ 41.342101] RSP: 0018:ffff8801bbe76918 EFLAGS: 00010202 [ 41.347449] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 41.354699] RDX: 1ffff100377ced2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 41.361952] RBP: ffff8801bbe77320 R08: dffffc0000000000 R09: fffffbfff12d6a48 [ 41.369219] R10: fffffbfff12d6a48 R11: ffffffff896b5243 R12: ffff8801b27633b0 [ 41.376469] R13: dffffc0000000000 R14: ffff8801bbe772f8 R15: ffff8801bbe77438 [ 41.383722] FS: 0000000002082880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 41.391943] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.397810] CR2: 0000000020000080 CR3: 00000001c51e0000 CR4: 00000000001406f0 [ 41.405065] Call Trace: [ 41.407641] ? lockdep_on+0x50/0x50 [ 41.411263] ? rb_insert_color+0x1460/0x1460 [ 41.415671] ? noop_count+0x40/0x40 [ 41.419279] ? lock_pin_lock+0x350/0x350 [ 41.423321] ? noop_count+0x40/0x40 [ 41.426944] ? kasan_check_read+0x11/0x20 [ 41.431186] ? noop_count+0x40/0x40 [ 41.434798] ? noop_count+0x40/0x40 [ 41.438406] ? lock_pin_lock+0x350/0x350 [ 41.442447] ? mark_held_locks+0x130/0x130 [ 41.446673] ? check_usage_forwards+0x3e0/0x3e0 [ 41.451323] ? __bfs+0x385/0x7a0 [ 41.454671] ? noop_count+0x40/0x40 [ 41.458283] ? check_usage+0x1a9/0x790 [ 41.462167] ? lock_pin_lock+0x350/0x350 [ 41.466214] ? check_usage_forwards+0x3e0/0x3e0 [ 41.470867] ? __bfs+0x385/0x7a0 [ 41.474214] ? __lock_acquire+0x7ec/0x4ec0 [ 41.478432] ? lockdep_on+0x50/0x50 [ 41.482043] ? lock_pin_lock+0x350/0x350 [ 41.486093] ? mark_held_locks+0x130/0x130 [ 41.490329] ? kasan_check_read+0x11/0x20 [ 41.494463] ? __lock_acquire+0x2881/0x4ec0 [ 41.498781] ? mark_held_locks+0x130/0x130 [ 41.502999] ? print_usage_bug+0xc0/0xc0 [ 41.507080] ? _raw_spin_unlock+0x2c/0x50 [ 41.511228] ? graph_lock+0x170/0x170 [ 41.515026] ? ext4_exit_mballoc+0xc0/0xc0 [ 41.519271] ? __lock_acquire+0x7ec/0x4ec0 [ 41.523489] ? find_held_lock+0x36/0x1c0 [ 41.527546] ? mark_held_locks+0x130/0x130 [ 41.531767] ? lock_downgrade+0x900/0x900 [ 41.535919] ? ext4_es_scan+0x960/0x960 [ 41.539879] ? do_raw_write_trylock+0x1c0/0x1c0 [ 41.544532] ? kasan_check_write+0x14/0x20 [ 41.548764] ? lock_acquire+0x1ed/0x520 [ 41.552723] ? integrity_inode_free+0x77/0x320 [ 41.557300] ? ext4_es_remove_extent+0x151/0x500 [ 41.562042] ? lock_release+0x970/0x970 [ 41.566003] ? kasan_check_write+0x14/0x20 [ 41.570221] ? do_raw_write_lock+0xbd/0x1b0 [ 41.574555] integrity_inode_free+0x12f/0x320 [ 41.579040] security_inode_free+0x19/0x90 [ 41.583257] __destroy_inode+0x328/0x820 [ 41.587308] ? generic_update_time+0x450/0x450 [ 41.591872] ? evict+0x5d8/0x980 [ 41.595226] ? lock_downgrade+0x900/0x900 [ 41.599360] ? __inode_wait_for_writeback+0x2cf/0x380 [ 41.604536] destroy_inode+0xda/0x200 [ 41.608320] ? __destroy_inode+0x820/0x820 [ 41.612532] ? kasan_check_write+0x14/0x20 [ 41.616777] ? do_raw_spin_lock+0xc1/0x200 [ 41.620996] evict+0x5e0/0x980 [ 41.624187] ? destroy_inode+0x200/0x200 [ 41.628255] ? iput+0x671/0xa90 [ 41.631531] ? lock_downgrade+0x900/0x900 [ 41.635664] ? kasan_check_read+0x11/0x20 [ 41.639796] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 41.644362] ? lock_downgrade+0x900/0x900 [ 41.648494] iput+0x679/0xa90 [ 41.651586] ? inode_add_lru+0x2a0/0x2a0 [ 41.655631] ? up_write+0x7b/0x220 [ 41.659149] ? up_read+0x110/0x110 [ 41.662666] ? up_read+0x110/0x110 [ 41.666191] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.671712] ? check_preemption_disabled+0x48/0x200 [ 41.676719] ext4_ioctl+0x236f/0x4210 [ 41.680515] ? ext4_ioctl_group_add+0x560/0x560 [ 41.685169] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 41.690963] ? kasan_check_read+0x11/0x20 [ 41.695108] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 41.700368] ? rcu_bh_qs+0xc0/0xc0 [ 41.703894] ? unwind_dump+0x190/0x190 [ 41.707784] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.713305] ? avc_has_extended_perms+0xab2/0x15a0 [ 41.718223] ? fpu__prepare_read+0x287/0x750 [ 41.722627] ? avc_ss_reset+0x190/0x190 [ 41.726611] ? save_stack+0xa9/0xd0 [ 41.730218] ? save_stack+0x43/0xd0 [ 41.733836] ? __kasan_slab_free+0x102/0x150 [ 41.738225] ? kasan_slab_free+0xe/0x10 [ 41.742202] ? kmem_cache_free+0x83/0x290 [ 41.746337] ? putname+0xf2/0x130 [ 41.749780] ? do_sys_open+0x54d/0x700 [ 41.753664] ? __x64_sys_openat+0x9d/0x100 [ 41.757903] ? do_syscall_64+0x1b9/0x820 [ 41.761950] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.767305] ? ___might_sleep+0x1ed/0x300 [ 41.771441] ? arch_local_save_flags+0x40/0x40 [ 41.776010] ? kasan_check_write+0x14/0x20 [ 41.780241] ? trace_hardirqs_off+0xb8/0x310 [ 41.784640] ? ext4_ioctl_group_add+0x560/0x560 [ 41.789296] do_vfs_ioctl+0x1de/0x1720 [ 41.793167] ? ioctl_preallocate+0x300/0x300 [ 41.797564] ? selinux_file_mprotect+0x620/0x620 [ 41.802304] ? path_openat+0x2f41/0x5160 [ 41.806355] ? rcu_read_lock_sched_held+0x108/0x120 [ 41.811375] ? kmem_cache_free+0x24f/0x290 [ 41.815596] ? putname+0xf7/0x130 [ 41.819046] ? do_syscall_64+0x9a/0x820 [ 41.823005] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.828538] ? security_file_ioctl+0x94/0xc0 [ 41.832940] ksys_ioctl+0xa9/0xd0 [ 41.836379] __x64_sys_ioctl+0x73/0xb0 [ 41.840274] do_syscall_64+0x1b9/0x820 [ 41.844147] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 41.849507] ? syscall_return_slowpath+0x5e0/0x5e0 [ 41.854519] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.859346] ? trace_hardirqs_on_caller+0x310/0x310 [ 41.864344] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 41.869356] ? prepare_exit_to_usermode+0x291/0x3b0 [ 41.874383] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.879226] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.884427] RIP: 0033:0x440019 [ 41.887604] 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 [ 41.906484] RSP: 002b:00007ffcf1434a38 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 41.914172] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440019 [ 41.921433] RDX: 0000000000440019 RSI: 0000000000006611 RDI: 0000000000000003 [ 41.928694] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 41.935944] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004018a0 [ 41.943191] R13: 0000000000401930 R14: 0000000000000000 R15: 0000000000000000 [ 41.950456] Modules linked in: [ 41.953700] ---[ end trace 23e2a80a27fe6518 ]--- [ 41.958489] RIP: 0010:rb_erase+0x306/0x3710 [ 41.962797] 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 [ 41.981714] RSP: 0018:ffff8801bbe76918 EFLAGS: 00010202 [ 41.987109] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 41.994395] RDX: 1ffff100377ced2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 42.001662] RBP: ffff8801bbe77320 R08: dffffc0000000000 R09: fffffbfff12d6a48 [ 42.008945] R10: fffffbfff12d6a48 R11: ffffffff896b5243 R12: ffff8801b27633b0 [ 42.016245] R13: dffffc0000000000 R14: ffff8801bbe772f8 R15: ffff8801bbe77438 [ 42.023506] FS: 0000000002082880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 42.031762] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.037659] CR2: 0000000020000080 CR3: 00000001c51e0000 CR4: 00000000001406f0 [ 42.044946] Kernel panic - not syncing: Fatal exception [ 42.051214] Kernel Offset: disabled [ 42.054836] Rebooting in 86400 seconds..