[....] 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. [ 31.192654] audit: type=1800 audit(1539959711.519:33): pid=5341 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 [ 31.216688] audit: type=1800 audit(1539959711.529:34): pid=5341 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: [ 34.896885] audit: type=1400 audit(1539959715.229:35): avc: denied { map } for pid=5517 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 '10.128.0.67' (ECDSA) to the list of known hosts. executing program [ 41.560271] audit: type=1400 audit(1539959721.889:36): avc: denied { map } for pid=5531 comm="syz-executor532" path="/root/syz-executor532797478" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 41.564996] kasan: CONFIG_KASAN_INLINE enabled [ 41.591643] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 41.599207] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 41.605524] CPU: 0 PID: 5531 Comm: syz-executor532 Not tainted 4.19.0-rc8+ #70 [ 41.612877] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.622239] RIP: 0010:rb_erase+0x306/0x3710 [ 41.626698] 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 [ 41.645704] RSP: 0018:ffff8801c4aa6918 EFLAGS: 00010202 [ 41.651163] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 41.658434] RDX: 1ffff10038954d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 41.665864] RBP: ffff8801c4aa7320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 41.673163] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b26cb3b0 [ 41.680429] R13: dffffc0000000000 R14: ffff8801c4aa72f8 R15: ffff8801c4aa7438 [ 41.687699] FS: 0000000001b73880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 41.696032] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.701956] CR2: 0000000020000080 CR3: 00000001cc676000 CR4: 00000000001406f0 [ 41.709222] Call Trace: [ 41.711808] ? lockdep_on+0x50/0x50 [ 41.715487] ? rb_insert_color+0x1460/0x1460 [ 41.719951] ? noop_count+0x40/0x40 [ 41.723575] ? lock_pin_lock+0x350/0x350 [ 41.727633] ? mark_held_locks+0x130/0x130 [ 41.731868] ? kasan_check_read+0x11/0x20 [ 41.736014] ? noop_count+0x40/0x40 [ 41.739638] ? lock_pin_lock+0x350/0x350 [ 41.743700] ? mark_held_locks+0x130/0x130 [ 41.747937] ? check_usage_forwards+0x3e0/0x3e0 [ 41.752603] ? __bfs+0x385/0x7a0 [ 41.756020] ? noop_count+0x40/0x40 [ 41.759648] ? check_usage+0x1a9/0x790 [ 41.763663] ? lock_pin_lock+0x350/0x350 [ 41.767740] ? check_usage_forwards+0x3e0/0x3e0 [ 41.772459] ? __bfs+0x385/0x7a0 [ 41.775825] ? lockdep_on+0x50/0x50 [ 41.779508] ? lock_pin_lock+0x350/0x350 [ 41.783571] ? mark_held_locks+0x130/0x130 [ 41.787819] ? kasan_check_read+0x11/0x20 [ 41.791962] ? __lock_acquire+0x2881/0x4ec0 [ 41.796443] ? mark_held_locks+0x130/0x130 [ 41.800678] ? print_usage_bug+0xc0/0xc0 [ 41.804737] ? _raw_spin_unlock+0x2c/0x50 [ 41.808883] ? graph_lock+0x170/0x170 [ 41.812683] ? ext4_exit_mballoc+0xc0/0xc0 [ 41.816973] ? __lock_acquire+0x7ec/0x4ec0 [ 41.821210] ? find_held_lock+0x36/0x1c0 [ 41.825270] ? mark_held_locks+0x130/0x130 [ 41.829501] ? lock_downgrade+0x900/0x900 [ 41.833653] ? ext4_es_scan+0x960/0x960 [ 41.837631] ? lock_release+0x970/0x970 [ 41.841606] ? do_raw_write_trylock+0x1c0/0x1c0 [ 41.846288] ? kasan_check_write+0x14/0x20 [ 41.850646] ? lock_acquire+0x1ed/0x520 [ 41.854619] ? integrity_inode_free+0x77/0x320 [ 41.859223] ? ext4_es_remove_extent+0x151/0x500 [ 41.864032] ? lock_release+0x970/0x970 [ 41.868064] ? kasan_check_write+0x14/0x20 [ 41.872454] ? do_raw_write_lock+0xbd/0x1b0 [ 41.876776] integrity_inode_free+0x12f/0x320 [ 41.881273] security_inode_free+0x19/0x90 [ 41.885504] __destroy_inode+0x328/0x820 [ 41.889564] ? generic_update_time+0x450/0x450 [ 41.894165] ? evict+0x5d8/0x980 [ 41.897528] ? lock_downgrade+0x900/0x900 [ 41.901672] ? __inode_wait_for_writeback+0x2cf/0x380 [ 41.906860] destroy_inode+0xda/0x200 [ 41.910660] ? __destroy_inode+0x820/0x820 [ 41.914913] ? kasan_check_write+0x14/0x20 [ 41.919165] ? do_raw_spin_lock+0xc1/0x200 [ 41.923400] evict+0x5e0/0x980 [ 41.926590] ? destroy_inode+0x200/0x200 [ 41.930651] ? iput+0x671/0xa90 [ 41.933929] ? lock_downgrade+0x900/0x900 [ 41.938186] ? kasan_check_read+0x11/0x20 [ 41.942472] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 41.947051] ? lock_downgrade+0x900/0x900 [ 41.951198] iput+0x679/0xa90 [ 41.954300] ? inode_add_lru+0x2a0/0x2a0 [ 41.958358] ? up_write+0x7b/0x220 [ 41.961897] ? up_read+0x110/0x110 [ 41.965428] ? up_read+0x110/0x110 [ 41.968965] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.974504] ? check_preemption_disabled+0x48/0x200 [ 41.979518] ext4_ioctl+0x236f/0x4210 [ 41.983327] ? ext4_ioctl_group_add+0x560/0x560 [ 41.988052] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 41.993988] ? kasan_check_read+0x11/0x20 [ 41.998252] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 42.003536] ? rcu_bh_qs+0xc0/0xc0 [ 42.007082] ? unwind_dump+0x190/0x190 [ 42.011217] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.016754] ? avc_has_extended_perms+0xab2/0x15a0 [ 42.021684] ? convert_from_fxsr+0x4a7/0x7d0 [ 42.026225] ? avc_ss_reset+0x190/0x190 [ 42.030213] ? save_stack+0xa9/0xd0 [ 42.033837] ? save_stack+0x43/0xd0 [ 42.037459] ? __kasan_slab_free+0x102/0x150 [ 42.041861] ? kasan_slab_free+0xe/0x10 [ 42.045886] ? kmem_cache_free+0x83/0x290 [ 42.050086] ? putname+0xf2/0x130 [ 42.053588] ? do_sys_open+0x54d/0x700 [ 42.057472] ? __x64_sys_openat+0x9d/0x100 [ 42.061704] ? do_syscall_64+0x1b9/0x820 [ 42.065764] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.071152] ? ___might_sleep+0x1ed/0x300 [ 42.075358] ? arch_local_save_flags+0x40/0x40 [ 42.079966] ? kasan_check_write+0x14/0x20 [ 42.084257] ? trace_hardirqs_off+0xb8/0x310 [ 42.088665] ? ext4_ioctl_group_add+0x560/0x560 [ 42.093378] do_vfs_ioctl+0x1de/0x1720 [ 42.097266] ? ioctl_preallocate+0x300/0x300 [ 42.101670] ? selinux_file_mprotect+0x620/0x620 [ 42.106483] ? path_openat+0x3d01/0x5160 [ 42.110540] ? rcu_read_lock_sched_held+0x108/0x120 [ 42.115554] ? kmem_cache_free+0x24f/0x290 [ 42.119789] ? putname+0xf7/0x130 [ 42.123241] ? do_syscall_64+0x9a/0x820 [ 42.127221] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 42.132755] ? security_file_ioctl+0x94/0xc0 [ 42.137194] ksys_ioctl+0xa9/0xd0 [ 42.140650] __x64_sys_ioctl+0x73/0xb0 [ 42.144534] do_syscall_64+0x1b9/0x820 [ 42.148417] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 42.153778] ? syscall_return_slowpath+0x5e0/0x5e0 [ 42.158707] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.163556] ? trace_hardirqs_on_caller+0x310/0x310 [ 42.168569] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 42.173704] ? prepare_exit_to_usermode+0x291/0x3b0 [ 42.178722] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.183620] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 42.188812] RIP: 0033:0x440009 [ 42.192052] 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 [ 42.211005] RSP: 002b:00007ffc31b028e8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 42.218710] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 42.225974] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 42.233242] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 42.240519] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 42.247786] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 42.255054] Modules linked in: [ 42.258406] ---[ end trace 2401348003b7ea07 ]--- [ 42.263266] RIP: 0010:rb_erase+0x306/0x3710 [ 42.267773] 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 [ 42.286852] RSP: 0018:ffff8801c4aa6918 EFLAGS: 00010202 [ 42.292218] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 42.299525] RDX: 1ffff10038954d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 42.306827] RBP: ffff8801c4aa7320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 42.314094] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b26cb3b0 [ 42.321419] R13: dffffc0000000000 R14: ffff8801c4aa72f8 R15: ffff8801c4aa7438 [ 42.328723] FS: 0000000001b73880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 42.336980] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.342875] CR2: 0000000020000080 CR3: 00000001cc676000 CR4: 00000000001406f0 [ 42.350255] Kernel panic - not syncing: Fatal exception [ 42.356712] Kernel Offset: disabled [ 42.360349] Rebooting in 86400 seconds..