[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 27.977512] kauditd_printk_skb: 9 callbacks suppressed [ 27.977523] audit: type=1800 audit(1540275378.555:33): pid=5256 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 [ 28.006201] audit: type=1800 audit(1540275378.555:34): pid=5256 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: [ 33.794352] audit: type=1400 audit(1540275384.375:35): avc: denied { map } for pid=5432 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 '10.128.0.96' (ECDSA) to the list of known hosts. executing program [ 40.506841] audit: type=1400 audit(1540275391.085:36): avc: denied { map } for pid=5447 comm="syz-executor760" path="/root/syz-executor760785028" 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 [ 40.511452] kasan: CONFIG_KASAN_INLINE enabled [ 40.537819] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 40.545266] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 40.551485] CPU: 1 PID: 5447 Comm: syz-executor760 Not tainted 4.19.0+ #77 [ 40.558477] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.567823] RIP: 0010:rb_erase+0x306/0x3710 [ 40.572140] 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 [ 40.591027] RSP: 0018:ffff8801bfd0e918 EFLAGS: 00010202 [ 40.596400] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 40.603670] RDX: 1ffff10037fa1d2b RSI: ffffffff8afc0860 RDI: 0000000000000008 [ 40.610922] RBP: ffff8801bfd0f320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 40.618176] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b12e93b0 [ 40.625532] R13: dffffc0000000000 R14: ffff8801bfd0f2f8 R15: ffff8801bfd0f438 [ 40.632792] FS: 0000000000fc7880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 40.640997] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.646865] CR2: 0000000020000080 CR3: 00000001c8d40000 CR4: 00000000001406e0 [ 40.654121] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.661373] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.668645] Call Trace: [ 40.671223] ? lockdep_on+0x50/0x50 [ 40.674837] ? rb_insert_color+0x1460/0x1460 [ 40.679230] ? lock_downgrade+0x900/0x900 [ 40.683365] ? noop_count+0x40/0x40 [ 40.686981] ? lock_pin_lock+0x350/0x350 [ 40.691024] ? rcu_bh_qs+0xc0/0xc0 [ 40.694547] ? unwind_dump+0x190/0x190 [ 40.698421] ? kasan_check_read+0x11/0x20 [ 40.702564] ? noop_count+0x40/0x40 [ 40.706174] ? lock_pin_lock+0x350/0x350 [ 40.710220] ? mark_held_locks+0x130/0x130 [ 40.714442] ? check_usage_forwards+0x3e0/0x3e0 [ 40.719093] ? __bfs+0x385/0x7a0 [ 40.722449] ? check_usage+0x1a9/0x790 [ 40.726320] ? lock_pin_lock+0x350/0x350 [ 40.730366] ? check_usage_forwards+0x3e0/0x3e0 [ 40.735021] ? __bfs+0x385/0x7a0 [ 40.738371] ? modules_open+0xa0/0xa0 [ 40.742155] ? lockdep_on+0x50/0x50 [ 40.745766] ? lock_pin_lock+0x350/0x350 [ 40.749830] ? mark_held_locks+0x130/0x130 [ 40.754050] ? kasan_check_read+0x11/0x20 [ 40.758185] ? __lock_acquire+0x2881/0x4ec0 [ 40.762494] ? mark_held_locks+0x130/0x130 [ 40.766722] ? print_usage_bug+0xc0/0xc0 [ 40.770764] ? _raw_spin_unlock+0x2c/0x50 [ 40.774897] ? graph_lock+0x170/0x170 [ 40.778681] ? ext4_exit_mballoc+0xc0/0xc0 [ 40.782904] ? __lock_acquire+0x7ec/0x4ec0 [ 40.787125] ? find_held_lock+0x36/0x1c0 [ 40.791178] ? mark_held_locks+0x130/0x130 [ 40.795402] ? lock_downgrade+0x900/0x900 [ 40.799536] ? ext4_es_scan+0x960/0x960 [ 40.803497] ? lock_release+0x970/0x970 [ 40.807457] ? do_raw_write_trylock+0x1c0/0x1c0 [ 40.812122] ? kasan_check_write+0x14/0x20 [ 40.816343] ? lock_acquire+0x1ed/0x520 [ 40.820297] ? integrity_inode_free+0x77/0x320 [ 40.824862] ? ext4_es_remove_extent+0x151/0x500 [ 40.829611] ? lock_release+0x970/0x970 [ 40.833571] ? kasan_check_write+0x14/0x20 [ 40.837790] ? do_raw_write_lock+0xbd/0x1e0 [ 40.842097] integrity_inode_free+0x12f/0x320 [ 40.846701] security_inode_free+0x19/0x90 [ 40.850933] __destroy_inode+0x328/0x820 [ 40.854987] ? generic_update_time+0x450/0x450 [ 40.859548] ? evict+0x5d8/0x980 [ 40.862899] ? lock_downgrade+0x900/0x900 [ 40.867035] ? __inode_wait_for_writeback+0x2cf/0x380 [ 40.872211] destroy_inode+0xda/0x200 [ 40.876082] ? __destroy_inode+0x820/0x820 [ 40.880306] ? kasan_check_write+0x14/0x20 [ 40.884525] ? do_raw_spin_lock+0xc1/0x230 [ 40.888745] evict+0x5e0/0x980 [ 40.891921] ? destroy_inode+0x200/0x200 [ 40.895970] ? iput+0x671/0xa90 [ 40.899236] ? lock_downgrade+0x900/0x900 [ 40.903372] ? kasan_check_read+0x11/0x20 [ 40.907502] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 40.912067] ? lock_downgrade+0x900/0x900 [ 40.916200] iput+0x679/0xa90 [ 40.919290] ? inode_add_lru+0x2a0/0x2a0 [ 40.923340] ? up_write+0x7b/0x220 [ 40.926860] ? up_read+0x110/0x110 [ 40.930386] ? up_read+0x110/0x110 [ 40.933912] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.939430] ? check_preemption_disabled+0x48/0x280 [ 40.944434] ext4_ioctl+0x236f/0x4210 [ 40.948223] ? ext4_ioctl_group_add+0x560/0x560 [ 40.952879] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 40.958661] ? kasan_check_read+0x11/0x20 [ 40.962813] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 40.968077] ? rcu_bh_qs+0xc0/0xc0 [ 40.971614] ? unwind_dump+0x190/0x190 [ 40.975487] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.981026] ? avc_has_extended_perms+0xab2/0x15a0 [ 40.985952] ? convert_from_fxsr+0x157/0x7d0 [ 40.990340] ? avc_ss_reset+0x190/0x190 [ 40.994302] ? save_stack+0xa9/0xd0 [ 40.997930] ? save_stack+0x43/0xd0 [ 41.001550] ? __kasan_slab_free+0x102/0x150 [ 41.005952] ? kasan_slab_free+0xe/0x10 [ 41.009905] ? kmem_cache_free+0x83/0x290 [ 41.014034] ? putname+0xf2/0x130 [ 41.017479] ? do_sys_open+0x54d/0x700 [ 41.021346] ? __x64_sys_openat+0x9d/0x100 [ 41.025563] ? do_syscall_64+0x1b9/0x820 [ 41.029611] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.034965] ? ___might_sleep+0x1ed/0x300 [ 41.039097] ? arch_local_save_flags+0x40/0x40 [ 41.043675] ? kasan_check_write+0x14/0x20 [ 41.047892] ? trace_hardirqs_off+0xb8/0x310 [ 41.052300] ? ext4_ioctl_group_add+0x560/0x560 [ 41.056974] do_vfs_ioctl+0x1de/0x1720 [ 41.060845] ? ioctl_preallocate+0x300/0x300 [ 41.065264] ? selinux_file_mprotect+0x620/0x620 [ 41.070012] ? path_openat+0x1ae1/0x5160 [ 41.074060] ? rcu_read_lock_sched_held+0x108/0x120 [ 41.079064] ? kmem_cache_free+0x24f/0x290 [ 41.083294] ? putname+0xf7/0x130 [ 41.086731] ? do_syscall_64+0x9a/0x820 [ 41.090689] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.096212] ? security_file_ioctl+0x94/0xc0 [ 41.100721] ksys_ioctl+0xa9/0xd0 [ 41.104160] __x64_sys_ioctl+0x73/0xb0 [ 41.108030] do_syscall_64+0x1b9/0x820 [ 41.111905] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 41.117256] ? syscall_return_slowpath+0x5e0/0x5e0 [ 41.122170] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.126996] ? trace_hardirqs_on_caller+0x310/0x310 [ 41.131999] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 41.136997] ? prepare_exit_to_usermode+0x291/0x3b0 [ 41.142001] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.146829] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.152004] RIP: 0033:0x440009 [ 41.155185] 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 [ 41.174069] RSP: 002b:00007ffef4cf7278 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 41.181764] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 41.189014] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 41.196267] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 41.203516] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 41.211258] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 41.218514] Modules linked in: [ 41.221886] ---[ end trace 29f542ecc7c7d044 ]--- [ 41.226654] RIP: 0010:rb_erase+0x306/0x3710 [ 41.230963] 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 [ 41.250003] RSP: 0018:ffff8801bfd0e918 EFLAGS: 00010202 [ 41.255396] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 41.262678] RDX: 1ffff10037fa1d2b RSI: ffffffff8afc0860 RDI: 0000000000000008 [ 41.269950] RBP: ffff8801bfd0f320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 41.277235] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b12e93b0 [ 41.284531] R13: dffffc0000000000 R14: ffff8801bfd0f2f8 R15: ffff8801bfd0f438 [ 41.291817] FS: 0000000000fc7880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 41.300037] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.305943] CR2: 0000000020000080 CR3: 00000001c8d40000 CR4: 00000000001406e0 [ 41.313226] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.320478] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.327762] Kernel panic - not syncing: Fatal exception [ 41.334364] Kernel Offset: disabled [ 41.338002] Rebooting in 86400 seconds..