[....] 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. [ 30.400904] audit: type=1800 audit(1539728010.684:33): pid=5326 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 [ 30.423435] audit: type=1800 audit(1539728010.694:34): pid=5326 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: [ 34.328292] audit: type=1400 audit(1539728014.614:35): avc: denied { map } for pid=5502 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 '10.128.0.53' (ECDSA) to the list of known hosts. executing program [ 40.991322] audit: type=1400 audit(1539728021.274:36): avc: denied { map } for pid=5516 comm="syz-executor885" path="/root/syz-executor885436917" 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 [ 40.996336] kasan: CONFIG_KASAN_INLINE enabled [ 41.022453] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 41.029821] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 41.036037] CPU: 0 PID: 5516 Comm: syz-executor885 Not tainted 4.19.0-rc8+ #65 [ 41.043404] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.052753] RIP: 0010:rb_erase+0x306/0x3710 [ 41.057059] 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 [ 41.075955] RSP: 0018:ffff8801b83c6918 EFLAGS: 00010202 [ 41.081316] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 41.088566] RDX: 1ffff10037078d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 41.095818] RBP: ffff8801b83c7320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 41.103082] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b0ef13b0 [ 41.110333] R13: dffffc0000000000 R14: ffff8801b83c72f8 R15: ffff8801b83c7438 [ 41.117618] FS: 0000000001672880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 41.125845] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.131708] CR2: 0000000020000080 CR3: 00000001c1945000 CR4: 00000000001406f0 [ 41.138963] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.146213] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.153459] Call Trace: [ 41.156033] ? lockdep_on+0x50/0x50 [ 41.159655] ? rb_insert_color+0x1460/0x1460 [ 41.164049] ? noop_count+0x40/0x40 [ 41.167677] ? lock_pin_lock+0x350/0x350 [ 41.171722] ? mark_held_locks+0x130/0x130 [ 41.175941] ? kasan_check_read+0x11/0x20 [ 41.180070] ? noop_count+0x40/0x40 [ 41.183687] ? lock_pin_lock+0x350/0x350 [ 41.187730] ? mark_held_locks+0x130/0x130 [ 41.191952] ? check_usage_forwards+0x3e0/0x3e0 [ 41.196603] ? __bfs+0x385/0x7a0 [ 41.199949] ? noop_count+0x40/0x40 [ 41.203559] ? check_usage+0x1a9/0x790 [ 41.207429] ? lock_pin_lock+0x350/0x350 [ 41.211482] ? check_usage_forwards+0x3e0/0x3e0 [ 41.216171] ? __bfs+0x385/0x7a0 [ 41.219517] ? modules_open+0xa0/0xa0 [ 41.223299] ? lockdep_on+0x50/0x50 [ 41.226907] ? lock_pin_lock+0x350/0x350 [ 41.230980] ? mark_held_locks+0x130/0x130 [ 41.235227] ? kasan_check_read+0x11/0x20 [ 41.239369] ? __lock_acquire+0x2881/0x4ec0 [ 41.243681] ? mark_held_locks+0x130/0x130 [ 41.247898] ? print_usage_bug+0xc0/0xc0 [ 41.251945] ? _raw_spin_unlock+0x2c/0x50 [ 41.256094] ? graph_lock+0x170/0x170 [ 41.259881] ? ext4_exit_mballoc+0xc0/0xc0 [ 41.264101] ? __lock_acquire+0x7ec/0x4ec0 [ 41.268318] ? find_held_lock+0x36/0x1c0 [ 41.272366] ? mark_held_locks+0x130/0x130 [ 41.276594] ? lock_downgrade+0x900/0x900 [ 41.280726] ? ext4_es_scan+0x960/0x960 [ 41.284701] ? lock_release+0x970/0x970 [ 41.288667] ? do_raw_write_trylock+0x1c0/0x1c0 [ 41.293321] ? kasan_check_write+0x14/0x20 [ 41.297540] ? lock_acquire+0x1ed/0x520 [ 41.301508] ? integrity_inode_free+0x77/0x320 [ 41.306124] ? ext4_es_remove_extent+0x151/0x500 [ 41.310898] ? lock_release+0x970/0x970 [ 41.314860] ? kasan_check_write+0x14/0x20 [ 41.319186] ? do_raw_write_lock+0xbd/0x1b0 [ 41.323493] integrity_inode_free+0x12f/0x320 [ 41.327973] security_inode_free+0x19/0x90 [ 41.332223] __destroy_inode+0x328/0x820 [ 41.336279] ? generic_update_time+0x450/0x450 [ 41.340844] ? evict+0x5d8/0x980 [ 41.344194] ? lock_downgrade+0x900/0x900 [ 41.348327] ? __inode_wait_for_writeback+0x2cf/0x380 [ 41.353500] destroy_inode+0xda/0x200 [ 41.357296] ? __destroy_inode+0x820/0x820 [ 41.361517] ? kasan_check_write+0x14/0x20 [ 41.365749] ? do_raw_spin_lock+0xc1/0x200 [ 41.369968] evict+0x5e0/0x980 [ 41.373145] ? destroy_inode+0x200/0x200 [ 41.377277] ? iput+0x671/0xa90 [ 41.380536] ? lock_downgrade+0x900/0x900 [ 41.384683] ? kasan_check_read+0x11/0x20 [ 41.388813] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 41.393377] ? lock_downgrade+0x900/0x900 [ 41.397507] iput+0x679/0xa90 [ 41.400595] ? inode_add_lru+0x2a0/0x2a0 [ 41.404675] ? up_write+0x7b/0x220 [ 41.408212] ? up_read+0x110/0x110 [ 41.411750] ? up_read+0x110/0x110 [ 41.415290] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.420811] ? check_preemption_disabled+0x48/0x200 [ 41.425813] ext4_ioctl+0x236f/0x4210 [ 41.429596] ? ext4_ioctl_group_add+0x560/0x560 [ 41.434253] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 41.440032] ? kasan_check_read+0x11/0x20 [ 41.444164] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 41.449424] ? rcu_bh_qs+0xc0/0xc0 [ 41.452948] ? unwind_dump+0x190/0x190 [ 41.456821] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.462339] ? avc_has_extended_perms+0xab2/0x15a0 [ 41.467270] ? convert_from_fxsr+0x4a7/0x7d0 [ 41.471701] ? avc_ss_reset+0x190/0x190 [ 41.475667] ? save_stack+0xa9/0xd0 [ 41.479284] ? save_stack+0x43/0xd0 [ 41.482911] ? __kasan_slab_free+0x102/0x150 [ 41.487303] ? kasan_slab_free+0xe/0x10 [ 41.491288] ? kmem_cache_free+0x83/0x290 [ 41.495446] ? putname+0xf2/0x130 [ 41.498897] ? do_sys_open+0x54d/0x700 [ 41.502766] ? __x64_sys_openat+0x9d/0x100 [ 41.506983] ? do_syscall_64+0x1b9/0x820 [ 41.511028] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.516379] ? ___might_sleep+0x1ed/0x300 [ 41.520524] ? arch_local_save_flags+0x40/0x40 [ 41.525088] ? kasan_check_write+0x14/0x20 [ 41.529307] ? trace_hardirqs_off+0xb8/0x310 [ 41.533714] ? ext4_ioctl_group_add+0x560/0x560 [ 41.538401] do_vfs_ioctl+0x1de/0x1720 [ 41.542273] ? ioctl_preallocate+0x300/0x300 [ 41.546685] ? selinux_file_mprotect+0x620/0x620 [ 41.551438] ? path_openat+0x3981/0x5160 [ 41.555487] ? rcu_read_lock_sched_held+0x108/0x120 [ 41.560486] ? kmem_cache_free+0x24f/0x290 [ 41.564703] ? putname+0xf7/0x130 [ 41.568172] ? do_syscall_64+0x9a/0x820 [ 41.572162] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.577700] ? security_file_ioctl+0x94/0xc0 [ 41.582091] ksys_ioctl+0xa9/0xd0 [ 41.585528] __x64_sys_ioctl+0x73/0xb0 [ 41.589411] do_syscall_64+0x1b9/0x820 [ 41.593285] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 41.598637] ? syscall_return_slowpath+0x5e0/0x5e0 [ 41.603550] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.608376] ? trace_hardirqs_on_caller+0x310/0x310 [ 41.613372] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 41.618371] ? prepare_exit_to_usermode+0x291/0x3b0 [ 41.623370] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.628222] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.633393] RIP: 0033:0x440009 [ 41.636567] 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 [ 41.655450] RSP: 002b:00007ffeed69ad08 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 41.663140] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 41.670394] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 41.677670] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 41.684922] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 41.692174] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 41.699438] Modules linked in: [ 41.703011] ---[ end trace 198ea97883fde115 ]--- [ 41.707784] RIP: 0010:rb_erase+0x306/0x3710 [ 41.712168] 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 [ 41.731113] RSP: 0018:ffff8801b83c6918 EFLAGS: 00010202 [ 41.736490] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 41.743774] RDX: 1ffff10037078d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 41.751041] RBP: ffff8801b83c7320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 41.758323] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b0ef13b0 [ 41.765607] R13: dffffc0000000000 R14: ffff8801b83c72f8 R15: ffff8801b83c7438 [ 41.772901] FS: 0000000001672880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 41.781137] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.787048] CR2: 0000000020000080 CR3: 00000001c1945000 CR4: 00000000001406f0 [ 41.794345] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.801628] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.808910] Kernel panic - not syncing: Fatal exception [ 41.815270] Kernel Offset: disabled [ 41.818892] Rebooting in 86400 seconds..