[ 35.346521] audit: type=1800 audit(1539190851.537:29): pid=5684 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 35.374322] audit: type=1800 audit(1539190851.547:30): pid=5684 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.29' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.476142] kauditd_printk_skb: 5 callbacks suppressed [ 43.476156] audit: type=1400 audit(1539190859.667:36): avc: denied { map } for pid=5874 comm="syz-executor702" path="/root/syz-executor702610356" 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 [ 43.480557] kasan: CONFIG_KASAN_INLINE enabled [ 43.512368] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 43.519744] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 43.525979] CPU: 1 PID: 5874 Comm: syz-executor702 Not tainted 4.19.0-rc7+ #55 [ 43.533322] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.542671] RIP: 0010:rb_erase+0x306/0x3710 [ 43.546980] 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 [ 43.565865] RSP: 0018:ffff8801c30d6918 EFLAGS: 00010202 [ 43.571212] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 43.578465] RDX: 1ffff1003861ad2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 43.585717] RBP: ffff8801c30d7320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 43.592992] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b7311430 [ 43.600262] R13: dffffc0000000000 R14: ffff8801c30d72f8 R15: ffff8801c30d7438 [ 43.607514] FS: 0000000000c21880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 43.615733] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.621600] CR2: 0000000020000080 CR3: 00000001b8777000 CR4: 00000000001406e0 [ 43.628897] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.636152] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.643401] Call Trace: [ 43.645978] ? rb_insert_color+0x1460/0x1460 [ 43.650379] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 43.655295] ? mark_held_locks+0x130/0x130 [ 43.659517] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 43.665299] ? mark_held_locks+0x130/0x130 [ 43.669521] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 43.674787] ? mark_held_locks+0x130/0x130 [ 43.679015] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 43.684534] ? mark_held_locks+0x130/0x130 [ 43.688752] ? mark_page_accessed+0xcb0/0x2040 [ 43.693318] ? activate_page+0x1040/0x1040 [ 43.697536] ? activate_page+0x1040/0x1040 [ 43.701772] ? pagecache_get_page+0x2d8/0xf00 [ 43.706252] ? find_get_pages_contig+0x15b0/0x15b0 [ 43.711163] ? lock_downgrade+0x900/0x900 [ 43.715307] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 43.721107] ? mark_held_locks+0x130/0x130 [ 43.725348] ? depot_save_stack+0x292/0x470 [ 43.729662] ? mark_held_locks+0x130/0x130 [ 43.733994] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 43.739441] ? lock_downgrade+0x900/0x900 [ 43.743577] ? kasan_check_read+0x11/0x20 [ 43.747708] ? do_raw_spin_unlock+0xa7/0x2f0 [ 43.752098] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 43.757658] ? mark_held_locks+0x130/0x130 [ 43.761877] ? _raw_spin_unlock+0x2c/0x50 [ 43.766009] ? ext4_discard_preallocations+0x18a/0x13c0 [ 43.771358] ? trace_hardirqs_on+0xbd/0x310 [ 43.775772] ? ext4_exit_mballoc+0xc0/0xc0 [ 43.779997] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 43.784995] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 43.789736] ? modules_open+0xa0/0xa0 [ 43.793520] ? __es_tree_search.isra.12+0x1ba/0x220 [ 43.798534] ? __es_remove_extent+0x9a3/0xba0 [ 43.803012] ? mark_held_locks+0x130/0x130 [ 43.807228] ? lock_downgrade+0x900/0x900 [ 43.811356] ? ext4_es_scan+0x960/0x960 [ 43.815417] ? lock_release+0x970/0x970 [ 43.819376] ? trace_hardirqs_on+0xbd/0x310 [ 43.823678] ? kasan_check_read+0x11/0x20 [ 43.827809] ? clear_inode+0x114/0x3a0 [ 43.831680] ? do_raw_write_trylock+0x1c0/0x1c0 [ 43.836334] ? kasan_check_write+0x14/0x20 [ 43.840551] ? lock_acquire+0x1ed/0x520 [ 43.844527] ? integrity_inode_free+0x77/0x320 [ 43.849093] ? ext4_es_remove_extent+0x151/0x500 [ 43.853830] ? lock_release+0x970/0x970 [ 43.857790] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 43.862877] ? depot_save_stack+0x292/0x470 [ 43.867185] ? kasan_check_write+0x14/0x20 [ 43.871402] ? do_raw_write_lock+0xbd/0x1b0 [ 43.875717] integrity_inode_free+0x12f/0x320 [ 43.880197] security_inode_free+0x19/0x90 [ 43.884417] __destroy_inode+0x328/0x820 [ 43.888462] ? generic_update_time+0x450/0x450 [ 43.893026] ? evict+0x5d8/0x980 [ 43.896374] ? lock_downgrade+0x900/0x900 [ 43.900512] ? __inode_wait_for_writeback+0x2cf/0x380 [ 43.905685] destroy_inode+0xda/0x200 [ 43.909466] ? __destroy_inode+0x820/0x820 [ 43.913680] ? kasan_check_write+0x14/0x20 [ 43.917911] ? do_raw_spin_lock+0xc1/0x200 [ 43.922127] evict+0x5e0/0x980 [ 43.925301] ? jbd2_journal_stop+0x430/0x15d0 [ 43.929785] ? destroy_inode+0x200/0x200 [ 43.933851] ? do_raw_spin_lock+0xc1/0x200 [ 43.938072] ? iput+0x671/0xa90 [ 43.941335] ? lock_downgrade+0x900/0x900 [ 43.945464] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 43.950986] ? kasan_check_read+0x11/0x20 [ 43.955135] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 43.959710] ? lock_downgrade+0x900/0x900 [ 43.963841] ? ext4_ioctl+0x231b/0x4210 [ 43.967798] iput+0x679/0xa90 [ 43.970903] ? inode_add_lru+0x2a0/0x2a0 [ 43.974948] ? up_write+0x7b/0x220 [ 43.978477] ? up_read+0x110/0x110 [ 43.982004] ? up_read+0x110/0x110 [ 43.985530] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.991050] ? check_preemption_disabled+0x48/0x200 [ 43.996358] ext4_ioctl+0x236f/0x4210 [ 44.000145] ? ext4_ioctl_group_add+0x560/0x560 [ 44.004804] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 44.010586] ? kasan_check_read+0x11/0x20 [ 44.014736] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 44.020002] ? unwind_dump+0x190/0x190 [ 44.023878] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.029400] ? avc_has_extended_perms+0xab2/0x15a0 [ 44.034329] ? fpu__prepare_read+0x17/0x750 [ 44.038720] ? avc_ss_reset+0x190/0x190 [ 44.042797] ? save_stack+0xa9/0xd0 [ 44.046423] ? save_stack+0x43/0xd0 [ 44.050032] ? __kasan_slab_free+0x102/0x150 [ 44.054425] ? kasan_slab_free+0xe/0x10 [ 44.058387] ? kmem_cache_free+0x83/0x290 [ 44.062522] ? putname+0xf2/0x130 [ 44.065964] ? do_sys_open+0x54d/0x700 [ 44.069833] ? __x64_sys_openat+0x9d/0x100 [ 44.074160] ? do_syscall_64+0x1b9/0x820 [ 44.078205] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.083653] ? trace_hardirqs_off+0xb8/0x310 [ 44.088041] ? kasan_check_read+0x11/0x20 [ 44.092187] ? do_raw_spin_unlock+0xa7/0x2f0 [ 44.096579] ? ___might_sleep+0x1ed/0x300 [ 44.100711] ? arch_local_save_flags+0x40/0x40 [ 44.105278] ? kasan_check_write+0x14/0x20 [ 44.109496] ? trace_hardirqs_off+0xb8/0x310 [ 44.113890] ? ext4_ioctl_group_add+0x560/0x560 [ 44.118541] do_vfs_ioctl+0x1de/0x1720 [ 44.122420] ? ioctl_preallocate+0x300/0x300 [ 44.126995] ? selinux_file_mprotect+0x620/0x620 [ 44.131732] ? putname+0xf2/0x130 [ 44.135171] ? kmem_cache_free+0x21a/0x290 [ 44.139391] ? putname+0xf7/0x130 [ 44.142849] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.148381] ? security_file_ioctl+0x94/0xc0 [ 44.152771] ksys_ioctl+0xa9/0xd0 [ 44.156207] __x64_sys_ioctl+0x73/0xb0 [ 44.160079] do_syscall_64+0x1b9/0x820 [ 44.163951] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 44.169317] ? syscall_return_slowpath+0x5e0/0x5e0 [ 44.174234] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.179065] ? trace_hardirqs_on_caller+0x310/0x310 [ 44.184065] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 44.189063] ? prepare_exit_to_usermode+0x291/0x3b0 [ 44.194065] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.198893] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.204064] RIP: 0033:0x440009 [ 44.207245] 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 [ 44.226138] RSP: 002b:00007fffb0b11108 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 44.233828] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 44.241098] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 44.248376] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 44.255624] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 44.262893] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 44.270154] Modules linked in: [ 44.273388] ---[ end trace e3c75efa20881b2b ]--- [ 44.278179] RIP: 0010:rb_erase+0x306/0x3710 [ 44.282486] 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 [ 44.301403] RSP: 0018:ffff8801c30d6918 EFLAGS: 00010202 [ 44.306765] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 44.314152] RDX: 1ffff1003861ad2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 44.321434] RBP: ffff8801c30d7320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 44.328715] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b7311430 [ 44.335985] R13: dffffc0000000000 R14: ffff8801c30d72f8 R15: ffff8801c30d7438 [ 44.343303] FS: 0000000000c21880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 44.351558] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.357446] CR2: 0000000020000080 CR3: 00000001b8777000 CR4: 00000000001406e0 [ 44.364713] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.372107] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.379398] Kernel panic - not syncing: Fatal exception [ 44.385968] Kernel Offset: disabled [ 44.389593] Rebooting in 86400 seconds..