[ 29.978987] audit: type=1800 audit(1539049469.544:25): pid=5591 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 29.998632] audit: type=1800 audit(1539049469.544:26): pid=5591 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 30.027045] audit: type=1800 audit(1539049469.544:27): pid=5591 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 30.047695] audit: type=1800 audit(1539049469.544:28): pid=5591 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?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 '10.128.0.118' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 48.233918] kasan: CONFIG_KASAN_INLINE enabled [ 48.238617] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 48.246021] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 48.252249] CPU: 0 PID: 5747 Comm: syz-executor700 Not tainted 4.19.0-rc7+ #274 [ 48.259677] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.269027] RIP: 0010:rb_erase+0x306/0x3710 [ 48.273427] 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 [ 48.292350] RSP: 0018:ffff8801c168e918 EFLAGS: 00010202 [ 48.297696] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 48.304945] RDX: 1ffff100382d1d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 48.312193] RBP: ffff8801c168f320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 48.319449] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8f5a1f0 [ 48.326697] R13: dffffc0000000000 R14: ffff8801c168f2f8 R15: ffff8801c168f438 [ 48.334085] FS: 0000000000c3a880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 48.342296] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.348158] CR2: 0000000020000380 CR3: 00000001d872c000 CR4: 00000000001406f0 [ 48.355417] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.362684] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.369939] Call Trace: [ 48.372517] ? rb_insert_color+0x1460/0x1460 [ 48.376918] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 48.381832] ? lock_downgrade+0x900/0x900 [ 48.385965] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 48.391904] ? mark_held_locks+0x130/0x130 [ 48.396137] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 48.401404] ? rcu_bh_qs+0xc0/0xc0 [ 48.404938] ? unwind_dump+0x190/0x190 [ 48.408818] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 48.414344] ? mark_held_locks+0x130/0x130 [ 48.418565] ? mark_page_accessed+0xcb0/0x2040 [ 48.423252] ? activate_page+0x1040/0x1040 [ 48.427485] ? activate_page+0x1040/0x1040 [ 48.431911] ? mark_held_locks+0x130/0x130 [ 48.436145] ? kasan_kmalloc+0xc7/0xe0 [ 48.440016] ? kmem_cache_alloc_trace+0x152/0x750 [ 48.444850] ? ima_add_digest_entry+0xcb/0x6a0 [ 48.449415] ? ima_add_template_entry+0x466/0x7f0 [ 48.454244] ? ima_store_template+0x224/0x310 [ 48.458729] ? pagecache_get_page+0x2d8/0xf00 [ 48.463208] ? find_get_pages_contig+0x15b0/0x15b0 [ 48.468271] ? is_bpf_text_address+0xac/0x170 [ 48.472773] ? lock_downgrade+0x900/0x900 [ 48.476913] ? mark_held_locks+0x130/0x130 [ 48.481136] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 48.486914] ? mark_held_locks+0x130/0x130 [ 48.491130] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 48.496475] ? lock_downgrade+0x900/0x900 [ 48.500603] ? kasan_check_read+0x11/0x20 [ 48.504728] ? do_raw_spin_unlock+0xa7/0x2f0 [ 48.509114] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 48.513674] ? mark_held_locks+0x130/0x130 [ 48.517893] ? _raw_spin_unlock+0x2c/0x50 [ 48.522018] ? ext4_discard_preallocations+0x18a/0x13c0 [ 48.527361] ? trace_hardirqs_on+0xbd/0x310 [ 48.531662] ? ext4_exit_mballoc+0xc0/0xc0 [ 48.535978] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 48.540993] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 48.545737] ? modules_open+0xa0/0xa0 [ 48.549521] ? __es_tree_search.isra.12+0x1ba/0x220 [ 48.554519] ? __es_remove_extent+0x9a3/0xba0 [ 48.558991] ? mark_held_locks+0x130/0x130 [ 48.563201] ? lock_downgrade+0x900/0x900 [ 48.567325] ? ext4_es_scan+0x960/0x960 [ 48.571277] ? lock_release+0x970/0x970 [ 48.575227] ? trace_hardirqs_on+0xbd/0x310 [ 48.579528] ? kasan_check_read+0x11/0x20 [ 48.583651] ? clear_inode+0x114/0x3a0 [ 48.587533] ? do_raw_write_trylock+0x1c0/0x1c0 [ 48.592327] ? kasan_check_write+0x14/0x20 [ 48.596566] ? lock_acquire+0x1ed/0x520 [ 48.600527] ? integrity_inode_free+0x77/0x320 [ 48.605096] ? ext4_es_remove_extent+0x151/0x500 [ 48.609835] ? lock_release+0x970/0x970 [ 48.613796] ? retint_kernel+0x2d/0x2d [ 48.617667] ? kasan_check_write+0x14/0x20 [ 48.621896] ? do_raw_write_lock+0xbd/0x1b0 [ 48.626198] integrity_inode_free+0x12f/0x320 [ 48.630673] security_inode_free+0x19/0x90 [ 48.634885] __destroy_inode+0x328/0x820 [ 48.638920] ? generic_update_time+0x450/0x450 [ 48.643481] ? evict+0x5d8/0x980 [ 48.646824] ? lock_downgrade+0x900/0x900 [ 48.650948] ? __inode_wait_for_writeback+0x2cf/0x380 [ 48.656115] destroy_inode+0xda/0x200 [ 48.659893] ? __destroy_inode+0x820/0x820 [ 48.664102] ? kasan_check_write+0x14/0x20 [ 48.668312] ? do_raw_spin_lock+0xc1/0x200 [ 48.672525] evict+0x5e0/0x980 [ 48.675699] ? jbd2_journal_stop+0x430/0x15d0 [ 48.680170] ? destroy_inode+0x200/0x200 [ 48.684208] ? do_raw_spin_lock+0xc1/0x200 [ 48.688418] ? iput+0x671/0xa90 [ 48.691676] ? lock_downgrade+0x900/0x900 [ 48.695954] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 48.701490] ? kasan_check_read+0x11/0x20 [ 48.705794] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 48.710483] ? lock_downgrade+0x900/0x900 [ 48.714615] ? ext4_ioctl+0x231b/0x4210 [ 48.718577] iput+0x679/0xa90 [ 48.721668] ? inode_add_lru+0x2a0/0x2a0 [ 48.725862] ? up_write+0x7b/0x220 [ 48.729411] ? up_read+0x110/0x110 [ 48.732937] ? up_read+0x110/0x110 [ 48.736462] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.742145] ? check_preemption_disabled+0x48/0x200 [ 48.747156] ext4_ioctl+0x236f/0x4210 [ 48.750948] ? is_bpf_text_address+0xac/0x170 [ 48.755446] ? ext4_ioctl_group_add+0x560/0x560 [ 48.760117] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 48.766179] ? kasan_check_read+0x11/0x20 [ 48.770475] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 48.775876] ? rcu_bh_qs+0xc0/0xc0 [ 48.779413] ? unwind_dump+0x190/0x190 [ 48.783302] ? is_bpf_text_address+0xd3/0x170 [ 48.787789] ? kernel_text_address+0x79/0xf0 [ 48.792194] ? __kernel_text_address+0xd/0x40 [ 48.796676] ? unwind_get_return_address+0x61/0xa0 [ 48.801903] ? __save_stack_trace+0x8d/0xf0 [ 48.806231] ? save_stack+0xa9/0xd0 [ 48.809846] ? save_stack+0x43/0xd0 [ 48.813615] ? __kasan_slab_free+0x102/0x150 [ 48.818186] ? kasan_slab_free+0xe/0x10 [ 48.822294] ? kmem_cache_free+0x83/0x290 [ 48.826442] ? putname+0xf2/0x130 [ 48.829890] ? do_sys_open+0x54d/0x700 [ 48.833762] ? __x64_sys_openat+0x9d/0x100 [ 48.837992] ? do_syscall_64+0x1b9/0x820 [ 48.842126] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.847483] ? trace_hardirqs_off+0xb8/0x310 [ 48.851876] ? kasan_check_read+0x11/0x20 [ 48.856009] ? do_raw_spin_unlock+0xa7/0x2f0 [ 48.860403] ? trace_hardirqs_on+0x310/0x310 [ 48.864790] ? kasan_check_write+0x14/0x20 [ 48.869247] ? trace_hardirqs_off+0xb8/0x310 [ 48.873805] ? trace_hardirqs_on+0x310/0x310 [ 48.878270] ? ext4_ioctl_group_add+0x560/0x560 [ 48.883002] do_vfs_ioctl+0x1de/0x1720 [ 48.886893] ? trace_hardirqs_on+0xbd/0x310 [ 48.891201] ? ioctl_preallocate+0x300/0x300 [ 48.895601] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.901125] ? __fget_light+0x2e9/0x430 [ 48.905256] ? fget_raw+0x20/0x20 [ 48.908874] ? putname+0xf2/0x130 [ 48.912315] ? kmem_cache_free+0x21a/0x290 [ 48.916530] ? putname+0xf7/0x130 [ 48.919984] ? security_file_ioctl+0x94/0xc0 [ 48.924390] ksys_ioctl+0xa9/0xd0 [ 48.927941] __x64_sys_ioctl+0x73/0xb0 [ 48.931827] do_syscall_64+0x1b9/0x820 [ 48.935704] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 48.941119] ? syscall_return_slowpath+0x5e0/0x5e0 [ 48.946040] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.950870] ? trace_hardirqs_on_caller+0x310/0x310 [ 48.955869] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 48.960880] ? prepare_exit_to_usermode+0x291/0x3b0 [ 48.965890] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 48.970722] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.975891] RIP: 0033:0x440009 [ 48.979070] 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 [ 48.998085] RSP: 002b:00007ffda23e87b8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 49.005785] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 49.013043] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 49.020293] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 49.027542] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 49.034791] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 49.042046] Modules linked in: [ 49.045344] ---[ end trace 72eda5245853f1b6 ]--- [ 49.050217] RIP: 0010:rb_erase+0x306/0x3710 [ 49.054595] 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 [ 49.073545] RSP: 0018:ffff8801c168e918 EFLAGS: 00010202 [ 49.079014] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 49.086309] RDX: 1ffff100382d1d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 49.093576] RBP: ffff8801c168f320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 49.100859] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8f5a1f0 [ 49.108138] R13: dffffc0000000000 R14: ffff8801c168f2f8 R15: ffff8801c168f438 [ 49.115419] FS: 0000000000c3a880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 49.123636] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.129527] CR2: 0000000020000380 CR3: 00000001d872c000 CR4: 00000000001406f0 [ 49.136808] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 49.144086] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 49.151412] Kernel panic - not syncing: Fatal exception [ 49.157909] Kernel Offset: disabled [ 49.161532] Rebooting in 86400 seconds..