[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 37.033018] audit: type=1800 audit(1539236414.384:25): pid=5662 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 37.058388] audit: type=1800 audit(1539236414.384:26): pid=5662 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 37.077993] audit: type=1800 audit(1539236414.384:27): pid=5662 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 '10.128.0.120' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 66.616543] kasan: CONFIG_KASAN_INLINE enabled [ 66.621293] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 66.628681] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 66.634916] CPU: 0 PID: 5816 Comm: syz-executor519 Not tainted 4.19.0-rc7+ #276 [ 66.642425] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.651867] RIP: 0010:rb_erase+0x306/0x3710 [ 66.656181] 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 [ 66.675067] RSP: 0018:ffff8801d7bee918 EFLAGS: 00010202 [ 66.680417] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 66.687670] RDX: 1ffff1003af7dd2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 66.695051] RBP: ffff8801d7bef320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 66.702329] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b93691f0 [ 66.709657] R13: dffffc0000000000 R14: ffff8801d7bef2f8 R15: ffff8801d7bef438 [ 66.716919] FS: 0000000002257880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 66.725158] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.731100] CR2: 0000000020000080 CR3: 00000001d7fea000 CR4: 00000000001406f0 [ 66.738371] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.745627] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.752878] Call Trace: [ 66.755458] ? rb_insert_color+0x1460/0x1460 [ 66.759854] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 66.764830] ? lock_downgrade+0x900/0x900 [ 66.768974] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 66.774758] ? mark_held_locks+0x130/0x130 [ 66.779400] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 66.784703] ? rcu_bh_qs+0xc0/0xc0 [ 66.788232] ? unwind_dump+0x190/0x190 [ 66.792112] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 66.797692] ? mark_held_locks+0x130/0x130 [ 66.802079] ? mark_page_accessed+0xcb0/0x2040 [ 66.806662] ? activate_page+0x1040/0x1040 [ 66.810947] ? activate_page+0x1040/0x1040 [ 66.815206] ? mark_held_locks+0x130/0x130 [ 66.819433] ? kasan_kmalloc+0xc7/0xe0 [ 66.823308] ? kmem_cache_alloc_trace+0x152/0x750 [ 66.828166] ? ima_add_digest_entry+0xcb/0x6a0 [ 66.832745] ? ima_add_template_entry+0x466/0x7f0 [ 66.837650] ? ima_store_template+0x224/0x310 [ 66.842136] ? mark_held_locks+0x130/0x130 [ 66.846446] ? find_get_pages_contig+0x15b0/0x15b0 [ 66.851426] ? mark_held_locks+0x130/0x130 [ 66.855645] ? lock_downgrade+0x900/0x900 [ 66.859774] ? mark_held_locks+0x130/0x130 [ 66.864017] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 66.869803] ? mark_held_locks+0x130/0x130 [ 66.874024] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 66.879375] ? lock_downgrade+0x900/0x900 [ 66.883510] ? kasan_check_read+0x11/0x20 [ 66.887643] ? do_raw_spin_unlock+0xa7/0x2f0 [ 66.892042] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 66.896615] ? mark_held_locks+0x130/0x130 [ 66.900910] ? _raw_spin_unlock+0x2c/0x50 [ 66.905050] ? ext4_discard_preallocations+0x18a/0x13c0 [ 66.910463] ? ext4_exit_mballoc+0xc0/0xc0 [ 66.914686] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 66.919685] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 66.924434] ? modules_open+0xa0/0xa0 [ 66.928220] ? __es_tree_search.isra.12+0x1ba/0x220 [ 66.933223] ? __es_remove_extent+0x9a3/0xba0 [ 66.937703] ? mark_held_locks+0x130/0x130 [ 66.941971] ? lock_downgrade+0x900/0x900 [ 66.946106] ? ext4_es_scan+0x960/0x960 [ 66.950069] ? lock_release+0x970/0x970 [ 66.954032] ? trace_hardirqs_on+0xbd/0x310 [ 66.958341] ? kasan_check_read+0x11/0x20 [ 66.962477] ? clear_inode+0x114/0x3a0 [ 66.966536] ? do_raw_write_trylock+0x1c0/0x1c0 [ 66.971199] ? kasan_check_write+0x14/0x20 [ 66.975431] ? lock_acquire+0x1ed/0x520 [ 66.979401] ? integrity_inode_free+0x77/0x320 [ 66.983977] ? ext4_es_remove_extent+0x151/0x500 [ 66.988716] ? lock_release+0x970/0x970 [ 66.992675] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 66.997759] ? depot_save_stack+0x292/0x470 [ 67.002063] ? kasan_check_write+0x14/0x20 [ 67.006282] ? do_raw_write_lock+0xbd/0x1b0 [ 67.010592] integrity_inode_free+0x12f/0x320 [ 67.015080] security_inode_free+0x19/0x90 [ 67.019304] __destroy_inode+0x328/0x820 [ 67.023431] ? generic_update_time+0x450/0x450 [ 67.028071] ? evict+0x5d8/0x980 [ 67.031435] ? lock_downgrade+0x900/0x900 [ 67.035569] ? __inode_wait_for_writeback+0x2cf/0x380 [ 67.040749] destroy_inode+0xda/0x200 [ 67.044558] ? __destroy_inode+0x820/0x820 [ 67.048783] ? kasan_check_write+0x14/0x20 [ 67.053005] ? do_raw_spin_lock+0xc1/0x200 [ 67.057372] evict+0x5e0/0x980 [ 67.060556] ? jbd2_journal_stop+0x430/0x15d0 [ 67.065037] ? destroy_inode+0x200/0x200 [ 67.069150] ? do_raw_spin_lock+0xc1/0x200 [ 67.073379] ? iput+0x671/0xa90 [ 67.076648] ? lock_downgrade+0x900/0x900 [ 67.080872] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 67.086418] ? kasan_check_read+0x11/0x20 [ 67.090568] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 67.095133] ? lock_downgrade+0x900/0x900 [ 67.099262] ? ext4_ioctl+0x231b/0x4210 [ 67.103222] iput+0x679/0xa90 [ 67.106416] ? inode_add_lru+0x2a0/0x2a0 [ 67.110466] ? up_write+0x7b/0x220 [ 67.113990] ? up_read+0x110/0x110 [ 67.117526] ? up_read+0x110/0x110 [ 67.121120] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.126647] ? check_preemption_disabled+0x48/0x200 [ 67.131649] ext4_ioctl+0x236f/0x4210 [ 67.135480] ? is_bpf_text_address+0xac/0x170 [ 67.140029] ? ext4_ioctl_group_add+0x560/0x560 [ 67.144698] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 67.150548] ? kasan_check_read+0x11/0x20 [ 67.154686] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 67.159952] ? rcu_bh_qs+0xc0/0xc0 [ 67.163478] ? unwind_dump+0x190/0x190 [ 67.167351] ? is_bpf_text_address+0xd3/0x170 [ 67.171845] ? kernel_text_address+0x79/0xf0 [ 67.176245] ? __kernel_text_address+0xd/0x40 [ 67.180722] ? unwind_get_return_address+0x61/0xa0 [ 67.185637] ? __save_stack_trace+0x8d/0xf0 [ 67.189949] ? save_stack+0xa9/0xd0 [ 67.193563] ? save_stack+0x43/0xd0 [ 67.197171] ? __kasan_slab_free+0x102/0x150 [ 67.201559] ? kasan_slab_free+0xe/0x10 [ 67.205533] ? kmem_cache_free+0x83/0x290 [ 67.209661] ? putname+0xf2/0x130 [ 67.213110] ? do_sys_open+0x54d/0x700 [ 67.216979] ? __x64_sys_openat+0x9d/0x100 [ 67.221316] ? do_syscall_64+0x1b9/0x820 [ 67.225365] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.230715] ? trace_hardirqs_off+0xb8/0x310 [ 67.235106] ? kasan_check_read+0x11/0x20 [ 67.239236] ? do_raw_spin_unlock+0xa7/0x2f0 [ 67.243625] ? trace_hardirqs_on+0x310/0x310 [ 67.248016] ? kasan_check_write+0x14/0x20 [ 67.252235] ? trace_hardirqs_off+0xb8/0x310 [ 67.256625] ? trace_hardirqs_on+0x310/0x310 [ 67.261017] ? ext4_ioctl_group_add+0x560/0x560 [ 67.265672] do_vfs_ioctl+0x1de/0x1720 [ 67.269541] ? trace_hardirqs_on+0xbd/0x310 [ 67.273844] ? ioctl_preallocate+0x300/0x300 [ 67.278235] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.283758] ? __fget_light+0x2e9/0x430 [ 67.287712] ? fget_raw+0x20/0x20 [ 67.291148] ? putname+0xf2/0x130 [ 67.294584] ? kmem_cache_free+0x21a/0x290 [ 67.298802] ? putname+0xf7/0x130 [ 67.302241] ? security_file_ioctl+0x94/0xc0 [ 67.306633] ksys_ioctl+0xa9/0xd0 [ 67.310068] __x64_sys_ioctl+0x73/0xb0 [ 67.313938] do_syscall_64+0x1b9/0x820 [ 67.317810] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 67.323153] ? syscall_return_slowpath+0x5e0/0x5e0 [ 67.328068] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 67.332903] ? trace_hardirqs_on_caller+0x310/0x310 [ 67.337901] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 67.342901] ? prepare_exit_to_usermode+0x291/0x3b0 [ 67.347899] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 67.352730] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.357904] RIP: 0033:0x440009 [ 67.361086] 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 [ 67.380031] RSP: 002b:00007ffc33d890e8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 67.387741] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 67.395216] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 67.402469] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 67.409726] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 67.416977] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 67.424234] Modules linked in: [ 67.427570] ---[ end trace 01b409d7d7af30ec ]--- [ 67.432346] RIP: 0010:rb_erase+0x306/0x3710 [ 67.436652] 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 [ 67.455608] RSP: 0018:ffff8801d7bee918 EFLAGS: 00010202 [ 67.460961] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 67.468295] RDX: 1ffff1003af7dd2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 67.475593] RBP: ffff8801d7bef320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 67.482905] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b93691f0 [ 67.490170] R13: dffffc0000000000 R14: ffff8801d7bef2f8 R15: ffff8801d7bef438 [ 67.497537] FS: 0000000002257880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 67.505791] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.511657] CR2: 0000000020000080 CR3: 00000001d7fea000 CR4: 00000000001406f0 [ 67.519035] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.526371] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.533704] Kernel panic - not syncing: Fatal exception [ 67.539999] Kernel Offset: disabled [ 67.543625] Rebooting in 86400 seconds..