[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 37.388730] audit: type=1800 audit(1539304597.295:25): pid=5645 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 37.413988] audit: type=1800 audit(1539304597.295:26): pid=5645 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 37.434724] audit: type=1800 audit(1539304597.305:27): pid=5645 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 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 '10.128.0.68' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.764993] kasan: CONFIG_KASAN_INLINE enabled [ 45.769592] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 45.776983] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 45.783223] CPU: 0 PID: 5796 Comm: syz-executor375 Not tainted 4.19.0-rc7+ #279 [ 45.790664] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.800039] RIP: 0010:rb_erase+0x306/0x3710 [ 45.804360] 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 [ 45.823261] RSP: 0018:ffff8801c3276918 EFLAGS: 00010202 [ 45.828602] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 45.835856] RDX: 1ffff1003864ed2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 45.843110] RBP: ffff8801c3277320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 45.850371] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b9265970 [ 45.857620] R13: dffffc0000000000 R14: ffff8801c32772f8 R15: ffff8801c3277438 [ 45.864871] FS: 0000000000a20880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 45.873076] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.878937] CR2: 0000000020000080 CR3: 00000001d86bc000 CR4: 00000000001406f0 [ 45.886219] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.893472] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.900719] Call Trace: [ 45.903289] ? rb_insert_color+0x1460/0x1460 [ 45.907684] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 45.912613] ? lock_downgrade+0x900/0x900 [ 45.916763] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 45.922544] ? mark_held_locks+0x130/0x130 [ 45.926768] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 45.932028] ? rcu_bh_qs+0xc0/0xc0 [ 45.935568] ? unwind_dump+0x190/0x190 [ 45.939449] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 45.944978] ? mark_held_locks+0x130/0x130 [ 45.949206] ? mark_page_accessed+0xcb0/0x2040 [ 45.953767] ? activate_page+0x1040/0x1040 [ 45.957983] ? activate_page+0x1040/0x1040 [ 45.962219] ? mark_held_locks+0x130/0x130 [ 45.966451] ? kasan_kmalloc+0xc7/0xe0 [ 45.970412] ? kmem_cache_alloc_trace+0x152/0x750 [ 45.975253] ? ima_add_digest_entry+0xcb/0x6a0 [ 45.979813] ? ima_add_template_entry+0x466/0x7f0 [ 45.984636] ? ima_store_template+0x224/0x310 [ 45.989116] ? pagecache_get_page+0x2d8/0xf00 [ 45.993599] ? find_get_pages_contig+0x15b0/0x15b0 [ 45.998528] ? is_bpf_text_address+0xac/0x170 [ 46.003018] ? lock_downgrade+0x900/0x900 [ 46.007163] ? mark_held_locks+0x130/0x130 [ 46.011392] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 46.017173] ? mark_held_locks+0x130/0x130 [ 46.021394] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 46.026739] ? lock_downgrade+0x900/0x900 [ 46.030867] ? kasan_check_read+0x11/0x20 [ 46.035012] ? do_raw_spin_unlock+0xa7/0x2f0 [ 46.039404] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 46.043970] ? mark_held_locks+0x130/0x130 [ 46.048186] ? _raw_spin_unlock+0x2c/0x50 [ 46.052314] ? ext4_discard_preallocations+0x18a/0x13c0 [ 46.057662] ? trace_hardirqs_on+0xbd/0x310 [ 46.061967] ? ext4_exit_mballoc+0xc0/0xc0 [ 46.066203] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 46.071199] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 46.075955] ? modules_open+0xa0/0xa0 [ 46.079755] ? __es_tree_search.isra.12+0x1ba/0x220 [ 46.084757] ? __es_remove_extent+0x9a3/0xba0 [ 46.089250] ? mark_held_locks+0x130/0x130 [ 46.093469] ? lock_downgrade+0x900/0x900 [ 46.097614] ? ext4_es_scan+0x960/0x960 [ 46.101568] ? lock_release+0x970/0x970 [ 46.105528] ? trace_hardirqs_on+0xbd/0x310 [ 46.109830] ? kasan_check_read+0x11/0x20 [ 46.113963] ? clear_inode+0x114/0x3a0 [ 46.117850] ? do_raw_write_trylock+0x1c0/0x1c0 [ 46.122504] ? kasan_check_write+0x14/0x20 [ 46.126719] ? lock_acquire+0x1ed/0x520 [ 46.130682] ? integrity_inode_free+0x77/0x320 [ 46.135261] ? ext4_es_remove_extent+0x151/0x500 [ 46.139999] ? lock_release+0x970/0x970 [ 46.143970] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 46.149053] ? depot_save_stack+0x292/0x470 [ 46.153360] ? kasan_check_write+0x14/0x20 [ 46.157576] ? do_raw_write_lock+0xbd/0x1b0 [ 46.161896] integrity_inode_free+0x12f/0x320 [ 46.166391] security_inode_free+0x19/0x90 [ 46.170621] __destroy_inode+0x328/0x820 [ 46.174681] ? generic_update_time+0x450/0x450 [ 46.179252] ? evict+0x5d8/0x980 [ 46.182605] ? lock_downgrade+0x900/0x900 [ 46.186736] ? __inode_wait_for_writeback+0x2cf/0x380 [ 46.191923] destroy_inode+0xda/0x200 [ 46.195712] ? __destroy_inode+0x820/0x820 [ 46.199941] ? kasan_check_write+0x14/0x20 [ 46.204162] ? do_raw_spin_lock+0xc1/0x200 [ 46.208398] evict+0x5e0/0x980 [ 46.211582] ? jbd2_journal_stop+0x430/0x15d0 [ 46.216063] ? destroy_inode+0x200/0x200 [ 46.220119] ? do_raw_spin_lock+0xc1/0x200 [ 46.224335] ? iput+0x671/0xa90 [ 46.227598] ? lock_downgrade+0x900/0x900 [ 46.231730] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 46.237250] ? kasan_check_read+0x11/0x20 [ 46.241379] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 46.245958] ? lock_downgrade+0x900/0x900 [ 46.250102] ? ext4_ioctl+0x231b/0x4210 [ 46.254092] iput+0x679/0xa90 [ 46.257189] ? inode_add_lru+0x2a0/0x2a0 [ 46.261260] ? up_write+0x7b/0x220 [ 46.264785] ? up_read+0x110/0x110 [ 46.268321] ? up_read+0x110/0x110 [ 46.271857] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.277413] ? check_preemption_disabled+0x48/0x200 [ 46.282470] ext4_ioctl+0x236f/0x4210 [ 46.286256] ? is_bpf_text_address+0xac/0x170 [ 46.290748] ? ext4_ioctl_group_add+0x560/0x560 [ 46.295475] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 46.301258] ? kasan_check_read+0x11/0x20 [ 46.305404] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 46.310661] ? rcu_bh_qs+0xc0/0xc0 [ 46.314186] ? unwind_dump+0x190/0x190 [ 46.318058] ? is_bpf_text_address+0xd3/0x170 [ 46.322538] ? kernel_text_address+0x79/0xf0 [ 46.326928] ? __kernel_text_address+0xd/0x40 [ 46.331417] ? unwind_get_return_address+0x61/0xa0 [ 46.336343] ? __save_stack_trace+0x8d/0xf0 [ 46.340652] ? save_stack+0xa9/0xd0 [ 46.344296] ? save_stack+0x43/0xd0 [ 46.347904] ? __kasan_slab_free+0x102/0x150 [ 46.352305] ? kasan_slab_free+0xe/0x10 [ 46.356259] ? kmem_cache_free+0x83/0x290 [ 46.360389] ? putname+0xf2/0x130 [ 46.363822] ? do_sys_open+0x54d/0x700 [ 46.367690] ? __x64_sys_openat+0x9d/0x100 [ 46.371906] ? do_syscall_64+0x1b9/0x820 [ 46.375950] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.381365] ? trace_hardirqs_off+0xb8/0x310 [ 46.385768] ? kasan_check_read+0x11/0x20 [ 46.389900] ? do_raw_spin_unlock+0xa7/0x2f0 [ 46.394295] ? trace_hardirqs_on+0x310/0x310 [ 46.398704] ? kasan_check_write+0x14/0x20 [ 46.402953] ? trace_hardirqs_off+0xb8/0x310 [ 46.407345] ? trace_hardirqs_on+0x310/0x310 [ 46.411737] ? ext4_ioctl_group_add+0x560/0x560 [ 46.416390] do_vfs_ioctl+0x1de/0x1720 [ 46.420270] ? trace_hardirqs_on+0xbd/0x310 [ 46.424573] ? ioctl_preallocate+0x300/0x300 [ 46.428970] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.434489] ? __fget_light+0x2e9/0x430 [ 46.438455] ? fget_raw+0x20/0x20 [ 46.441889] ? putname+0xf2/0x130 [ 46.445323] ? kmem_cache_free+0x21a/0x290 [ 46.449552] ? putname+0xf7/0x130 [ 46.452991] ? security_file_ioctl+0x94/0xc0 [ 46.457393] ksys_ioctl+0xa9/0xd0 [ 46.460827] __x64_sys_ioctl+0x73/0xb0 [ 46.464697] do_syscall_64+0x1b9/0x820 [ 46.468586] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 46.473935] ? syscall_return_slowpath+0x5e0/0x5e0 [ 46.478846] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.483671] ? trace_hardirqs_on_caller+0x310/0x310 [ 46.488684] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 46.493684] ? prepare_exit_to_usermode+0x291/0x3b0 [ 46.498682] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.503508] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.508690] RIP: 0033:0x440009 [ 46.511866] 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 [ 46.530760] RSP: 002b:00007ffccf2ab098 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 46.538457] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 46.545709] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 46.552997] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 46.560247] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 46.567495] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 46.574750] Modules linked in: [ 46.578053] ---[ end trace 28290c1d8cc8db9a ]--- [ 46.582871] RIP: 0010:rb_erase+0x306/0x3710 [ 46.587191] 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 [ 46.606106] RSP: 0018:ffff8801c3276918 EFLAGS: 00010202 [ 46.611472] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 46.618768] RDX: 1ffff1003864ed2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 46.626065] RBP: ffff8801c3277320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 46.633355] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b9265970 [ 46.640626] R13: dffffc0000000000 R14: ffff8801c32772f8 R15: ffff8801c3277438 [ 46.647912] FS: 0000000000a20880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 46.656179] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.662044] CR2: 0000000020000080 CR3: 00000001d86bc000 CR4: 00000000001406f0 [ 46.669329] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.676613] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.683997] Kernel panic - not syncing: Fatal exception [ 46.690383] Kernel Offset: disabled [ 46.694005] Rebooting in 86400 seconds..