[....] 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 Sh[ 29.468066] audit: type=1800 audit(1538563142.814:33): pid=5283 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 ell server: sshd[ 29.490234] audit: type=1800 audit(1538563142.814:34): pid=5283 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 [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 34.410102] audit: type=1400 audit(1538563147.754:35): avc: denied { map } for pid=5461 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 '10.128.0.60' (ECDSA) to the list of known hosts. executing program [ 45.965560] audit: type=1400 audit(1538563159.314:36): avc: denied { map } for pid=5475 comm="syz-executor992" path="/root/syz-executor992518258" 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 [ 45.970554] kasan: CONFIG_KASAN_INLINE enabled [ 45.996621] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 46.004075] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 46.010291] CPU: 0 PID: 5475 Comm: syz-executor992 Not tainted 4.19.0-rc6+ #43 [ 46.017630] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.026972] RIP: 0010:rb_erase+0x306/0x3710 [ 46.031274] 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 [ 46.050283] RSP: 0018:ffff8801bac46918 EFLAGS: 00010202 [ 46.055628] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 46.062875] RDX: 1ffff10037588d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 46.070126] RBP: ffff8801bac47320 R08: dffffc0000000000 R09: fffffbfff12d6a48 [ 46.077377] R10: fffffbfff12d6a48 R11: ffffffff896b5243 R12: ffff8801b136f3f0 [ 46.085103] R13: dffffc0000000000 R14: ffff8801bac472f8 R15: ffff8801bac47438 [ 46.092363] FS: 000000000177f880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 46.100789] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.106657] CR2: 0000000020000080 CR3: 00000001b7dc1000 CR4: 00000000001406f0 [ 46.114000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.121257] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.128505] Call Trace: [ 46.131076] ? lockdep_on+0x50/0x50 [ 46.134819] ? rb_insert_color+0x1460/0x1460 [ 46.139215] ? noop_count+0x40/0x40 [ 46.142847] ? lock_pin_lock+0x350/0x350 [ 46.146891] ? noop_count+0x40/0x40 [ 46.150505] ? kasan_check_read+0x11/0x20 [ 46.154635] ? noop_count+0x40/0x40 [ 46.158246] ? noop_count+0x40/0x40 [ 46.161854] ? lock_pin_lock+0x350/0x350 [ 46.165896] ? mark_held_locks+0x130/0x130 [ 46.170120] ? check_usage_forwards+0x3e0/0x3e0 [ 46.174770] ? __bfs+0x385/0x7a0 [ 46.178114] ? noop_count+0x40/0x40 [ 46.181723] ? check_usage+0x1a9/0x790 [ 46.185590] ? lock_pin_lock+0x350/0x350 [ 46.189670] ? check_usage_forwards+0x3e0/0x3e0 [ 46.194323] ? __bfs+0x385/0x7a0 [ 46.197677] ? __lock_acquire+0x7ec/0x4ec0 [ 46.201900] ? lockdep_on+0x50/0x50 [ 46.205687] ? lock_pin_lock+0x350/0x350 [ 46.209741] ? mark_held_locks+0x130/0x130 [ 46.213958] ? kasan_check_read+0x11/0x20 [ 46.218086] ? __lock_acquire+0x2881/0x4ec0 [ 46.222393] ? mark_held_locks+0x130/0x130 [ 46.226609] ? print_usage_bug+0xc0/0xc0 [ 46.230700] ? _raw_spin_unlock+0x2c/0x50 [ 46.234840] ? graph_lock+0x170/0x170 [ 46.238622] ? ext4_exit_mballoc+0xc0/0xc0 [ 46.242838] ? __lock_acquire+0x7ec/0x4ec0 [ 46.247056] ? find_held_lock+0x36/0x1c0 [ 46.251099] ? mark_held_locks+0x130/0x130 [ 46.255315] ? lock_downgrade+0x900/0x900 [ 46.259514] ? ext4_es_scan+0x960/0x960 [ 46.263480] ? do_raw_write_trylock+0x1c0/0x1c0 [ 46.268138] ? kasan_check_write+0x14/0x20 [ 46.272355] ? lock_acquire+0x1ed/0x520 [ 46.276325] ? integrity_inode_free+0x77/0x320 [ 46.280941] ? ext4_es_remove_extent+0x151/0x500 [ 46.285794] ? lock_release+0x970/0x970 [ 46.289771] ? kasan_check_write+0x14/0x20 [ 46.293985] ? do_raw_write_lock+0xbd/0x1b0 [ 46.298291] integrity_inode_free+0x12f/0x320 [ 46.302783] security_inode_free+0x19/0x90 [ 46.307002] __destroy_inode+0x328/0x820 [ 46.311044] ? generic_update_time+0x450/0x450 [ 46.315608] ? evict+0x5d8/0x980 [ 46.318957] ? lock_downgrade+0x900/0x900 [ 46.323085] ? __inode_wait_for_writeback+0x2cf/0x380 [ 46.328259] destroy_inode+0xda/0x200 [ 46.332038] ? __destroy_inode+0x820/0x820 [ 46.336252] ? kasan_check_write+0x14/0x20 [ 46.340467] ? do_raw_spin_lock+0xc1/0x200 [ 46.344840] evict+0x5e0/0x980 [ 46.348018] ? destroy_inode+0x200/0x200 [ 46.352126] ? iput+0x671/0xa90 [ 46.355399] ? lock_downgrade+0x900/0x900 [ 46.359529] ? kasan_check_read+0x11/0x20 [ 46.363660] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 46.368230] ? lock_downgrade+0x900/0x900 [ 46.372360] iput+0x679/0xa90 [ 46.375543] ? inode_add_lru+0x2a0/0x2a0 [ 46.379594] ? up_write+0x7b/0x220 [ 46.383115] ? up_read+0x110/0x110 [ 46.386634] ? up_read+0x110/0x110 [ 46.390162] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.395685] ? check_preemption_disabled+0x48/0x200 [ 46.400686] ext4_ioctl+0x236f/0x4210 [ 46.404476] ? ext4_ioctl_group_add+0x560/0x560 [ 46.409132] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 46.414919] ? kasan_check_read+0x11/0x20 [ 46.419052] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 46.424323] ? rcu_bh_qs+0xc0/0xc0 [ 46.427860] ? unwind_dump+0x190/0x190 [ 46.431734] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.437252] ? avc_has_extended_perms+0xab2/0x15a0 [ 46.442173] ? fpu__prepare_read+0x287/0x750 [ 46.446568] ? avc_ss_reset+0x190/0x190 [ 46.450536] ? save_stack+0xa9/0xd0 [ 46.454143] ? save_stack+0x43/0xd0 [ 46.457752] ? __kasan_slab_free+0x102/0x150 [ 46.462140] ? kasan_slab_free+0xe/0x10 [ 46.466096] ? kmem_cache_free+0x83/0x290 [ 46.470226] ? putname+0xf2/0x130 [ 46.473660] ? do_sys_open+0x54d/0x700 [ 46.477530] ? __x64_sys_openat+0x9d/0x100 [ 46.481837] ? do_syscall_64+0x1b9/0x820 [ 46.485893] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.491249] ? ___might_sleep+0x1ed/0x300 [ 46.495379] ? arch_local_save_flags+0x40/0x40 [ 46.499946] ? kasan_check_write+0x14/0x20 [ 46.504350] ? trace_hardirqs_off+0xb8/0x310 [ 46.508757] ? ext4_ioctl_group_add+0x560/0x560 [ 46.513577] do_vfs_ioctl+0x1de/0x1720 [ 46.517449] ? ioctl_preallocate+0x300/0x300 [ 46.521841] ? selinux_file_mprotect+0x620/0x620 [ 46.526577] ? path_openat+0x2f41/0x5160 [ 46.530619] ? rcu_read_lock_sched_held+0x108/0x120 [ 46.535619] ? kmem_cache_free+0x24f/0x290 [ 46.539841] ? putname+0xf7/0x130 [ 46.543285] ? do_syscall_64+0x9a/0x820 [ 46.547246] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.552773] ? security_file_ioctl+0x94/0xc0 [ 46.557165] ksys_ioctl+0xa9/0xd0 [ 46.560602] __x64_sys_ioctl+0x73/0xb0 [ 46.564472] do_syscall_64+0x1b9/0x820 [ 46.568339] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 46.573684] ? syscall_return_slowpath+0x5e0/0x5e0 [ 46.578593] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.583488] ? trace_hardirqs_on_caller+0x310/0x310 [ 46.588501] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 46.593502] ? prepare_exit_to_usermode+0x291/0x3b0 [ 46.598501] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.603330] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.608499] RIP: 0033:0x4400d9 [ 46.611676] 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 [ 46.630560] RSP: 002b:00007ffecdaea1f8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 46.638251] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400d9 [ 46.645508] RDX: 0000000020000040 RSI: 0000000000006611 RDI: 0000000000000003 [ 46.652764] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 46.660383] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401960 [ 46.667634] R13: 00000000004019f0 R14: 0000000000000000 R15: 0000000000000000 [ 46.674887] Modules linked in: [ 46.678182] ---[ end trace cad173868e017aad ]--- [ 46.682969] RIP: 0010:rb_erase+0x306/0x3710 [ 46.687567] 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 [ 46.706722] RSP: 0018:ffff8801bac46918 EFLAGS: 00010202 [ 46.712088] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 46.719378] RDX: 1ffff10037588d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 46.726669] RBP: ffff8801bac47320 R08: dffffc0000000000 R09: fffffbfff12d6a48 [ 46.733925] R10: fffffbfff12d6a48 R11: ffffffff896b5243 R12: ffff8801b136f3f0 [ 46.741206] R13: dffffc0000000000 R14: ffff8801bac472f8 R15: ffff8801bac47438 [ 46.748491] FS: 000000000177f880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 46.756730] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.762609] CR2: 0000000020000080 CR3: 00000001b7dc1000 CR4: 00000000001406f0 [ 46.769897] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.777198] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.784486] Kernel panic - not syncing: Fatal exception [ 46.790822] Kernel Offset: disabled [ 46.794533] Rebooting in 86400 seconds..