[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 36.161782] audit: type=1800 audit(1539302790.188:25): pid=5640 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 36.186254] audit: type=1800 audit(1539302790.188:26): pid=5640 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 36.213551] audit: type=1800 audit(1539302790.188:27): pid=5640 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 '10.128.0.54' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.662691] kasan: CONFIG_KASAN_INLINE enabled [ 45.667298] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 45.674692] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 45.680922] CPU: 0 PID: 5791 Comm: syz-executor943 Not tainted 4.19.0-rc7+ #279 [ 45.688349] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.697694] RIP: 0010:rb_erase+0x306/0x3710 [ 45.701995] 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 [ 45.721058] RSP: 0018:ffff8801bbee6918 EFLAGS: 00010202 [ 45.726397] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 45.733645] RDX: 1ffff100377dcd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 45.740891] RBP: ffff8801bbee7320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 45.748138] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b8f30970 [ 45.755590] R13: dffffc0000000000 R14: ffff8801bbee72f8 R15: ffff8801bbee7438 [ 45.762838] FS: 0000000000c76880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 45.771052] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.776952] CR2: 0000000020000080 CR3: 00000001bfe80000 CR4: 00000000001406f0 [ 45.784205] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.791594] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.798846] Call Trace: [ 45.801426] ? rb_insert_color+0x1460/0x1460 [ 45.805822] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 45.810751] ? lock_downgrade+0x900/0x900 [ 45.814884] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 45.820662] ? mark_held_locks+0x130/0x130 [ 45.824880] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 45.830137] ? rcu_bh_qs+0xc0/0xc0 [ 45.833667] ? unwind_dump+0x190/0x190 [ 45.837539] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 45.843054] ? mark_held_locks+0x130/0x130 [ 45.847276] ? mark_page_accessed+0xcb0/0x2040 [ 45.851839] ? activate_page+0x1040/0x1040 [ 45.856056] ? activate_page+0x1040/0x1040 [ 45.860275] ? mark_held_locks+0x130/0x130 [ 45.864489] ? kasan_kmalloc+0xc7/0xe0 [ 45.868357] ? kmem_cache_alloc_trace+0x152/0x750 [ 45.873177] ? ima_add_digest_entry+0xcb/0x6a0 [ 45.877736] ? ima_add_template_entry+0x466/0x7f0 [ 45.882561] ? ima_store_template+0x224/0x310 [ 45.887056] ? pagecache_get_page+0x2d8/0xf00 [ 45.891534] ? find_get_pages_contig+0x15b0/0x15b0 [ 45.896448] ? is_bpf_text_address+0xac/0x170 [ 45.900921] ? lock_downgrade+0x900/0x900 [ 45.905046] ? mark_held_locks+0x130/0x130 [ 45.909261] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 45.915167] ? mark_held_locks+0x130/0x130 [ 45.919385] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 45.924728] ? lock_downgrade+0x900/0x900 [ 45.928859] ? kasan_check_read+0x11/0x20 [ 45.933029] ? do_raw_spin_unlock+0xa7/0x2f0 [ 45.937429] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 45.941989] ? mark_held_locks+0x130/0x130 [ 45.946212] ? _raw_spin_unlock+0x2c/0x50 [ 45.950345] ? ext4_discard_preallocations+0x18a/0x13c0 [ 45.955842] ? trace_hardirqs_on+0xbd/0x310 [ 45.960145] ? ext4_exit_mballoc+0xc0/0xc0 [ 45.964375] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 45.969370] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 45.974106] ? modules_open+0xa0/0xa0 [ 45.977909] ? __es_tree_search.isra.12+0x1ba/0x220 [ 45.982906] ? __es_remove_extent+0x9a3/0xba0 [ 45.987383] ? mark_held_locks+0x130/0x130 [ 45.991597] ? lock_downgrade+0x900/0x900 [ 45.995723] ? ext4_es_scan+0x960/0x960 [ 45.999765] ? lock_release+0x970/0x970 [ 46.003804] ? trace_hardirqs_on+0xbd/0x310 [ 46.008109] ? kasan_check_read+0x11/0x20 [ 46.012236] ? clear_inode+0x114/0x3a0 [ 46.016118] ? do_raw_write_trylock+0x1c0/0x1c0 [ 46.020798] ? kasan_check_write+0x14/0x20 [ 46.025011] ? lock_acquire+0x1ed/0x520 [ 46.029052] ? integrity_inode_free+0x77/0x320 [ 46.033620] ? ext4_es_remove_extent+0x151/0x500 [ 46.038364] ? lock_release+0x970/0x970 [ 46.042316] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 46.047395] ? depot_save_stack+0x292/0x470 [ 46.051698] ? kasan_check_write+0x14/0x20 [ 46.055910] ? do_raw_write_lock+0xbd/0x1b0 [ 46.060222] integrity_inode_free+0x12f/0x320 [ 46.064701] security_inode_free+0x19/0x90 [ 46.068919] __destroy_inode+0x328/0x820 [ 46.072959] ? generic_update_time+0x450/0x450 [ 46.077520] ? evict+0x5d8/0x980 [ 46.080866] ? lock_downgrade+0x900/0x900 [ 46.085002] ? __inode_wait_for_writeback+0x2cf/0x380 [ 46.090174] destroy_inode+0xda/0x200 [ 46.093961] ? __destroy_inode+0x820/0x820 [ 46.098413] ? kasan_check_write+0x14/0x20 [ 46.102629] ? do_raw_spin_lock+0xc1/0x200 [ 46.106844] evict+0x5e0/0x980 [ 46.110017] ? jbd2_journal_stop+0x430/0x15d0 [ 46.114486] ? destroy_inode+0x200/0x200 [ 46.118536] ? do_raw_spin_lock+0xc1/0x200 [ 46.122750] ? iput+0x671/0xa90 [ 46.126006] ? lock_downgrade+0x900/0x900 [ 46.130136] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 46.135653] ? kasan_check_read+0x11/0x20 [ 46.139783] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 46.144344] ? lock_downgrade+0x900/0x900 [ 46.148486] ? ext4_ioctl+0x231b/0x4210 [ 46.152439] iput+0x679/0xa90 [ 46.155526] ? inode_add_lru+0x2a0/0x2a0 [ 46.159570] ? up_write+0x7b/0x220 [ 46.163106] ? up_read+0x110/0x110 [ 46.166625] ? up_read+0x110/0x110 [ 46.170147] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.175667] ? check_preemption_disabled+0x48/0x200 [ 46.180679] ext4_ioctl+0x236f/0x4210 [ 46.184461] ? is_bpf_text_address+0xac/0x170 [ 46.188936] ? ext4_ioctl_group_add+0x560/0x560 [ 46.193674] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 46.199541] ? kasan_check_read+0x11/0x20 [ 46.203669] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 46.208929] ? rcu_bh_qs+0xc0/0xc0 [ 46.212450] ? unwind_dump+0x190/0x190 [ 46.216318] ? is_bpf_text_address+0xd3/0x170 [ 46.220799] ? kernel_text_address+0x79/0xf0 [ 46.225207] ? __kernel_text_address+0xd/0x40 [ 46.229686] ? unwind_get_return_address+0x61/0xa0 [ 46.234595] ? __save_stack_trace+0x8d/0xf0 [ 46.238986] ? save_stack+0xa9/0xd0 [ 46.242596] ? save_stack+0x43/0xd0 [ 46.246217] ? __kasan_slab_free+0x102/0x150 [ 46.250614] ? kasan_slab_free+0xe/0x10 [ 46.254579] ? kmem_cache_free+0x83/0x290 [ 46.258702] ? putname+0xf2/0x130 [ 46.262133] ? do_sys_open+0x54d/0x700 [ 46.266093] ? __x64_sys_openat+0x9d/0x100 [ 46.270311] ? do_syscall_64+0x1b9/0x820 [ 46.274354] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.279699] ? trace_hardirqs_off+0xb8/0x310 [ 46.284090] ? kasan_check_read+0x11/0x20 [ 46.288238] ? do_raw_spin_unlock+0xa7/0x2f0 [ 46.292629] ? trace_hardirqs_on+0x310/0x310 [ 46.297016] ? kasan_check_write+0x14/0x20 [ 46.301231] ? trace_hardirqs_off+0xb8/0x310 [ 46.305624] ? trace_hardirqs_on+0x310/0x310 [ 46.310017] ? ext4_ioctl_group_add+0x560/0x560 [ 46.314668] do_vfs_ioctl+0x1de/0x1720 [ 46.318537] ? trace_hardirqs_on+0xbd/0x310 [ 46.322951] ? ioctl_preallocate+0x300/0x300 [ 46.327343] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.332871] ? __fget_light+0x2e9/0x430 [ 46.336837] ? fget_raw+0x20/0x20 [ 46.340279] ? putname+0xf2/0x130 [ 46.343714] ? kmem_cache_free+0x21a/0x290 [ 46.347925] ? putname+0xf7/0x130 [ 46.351374] ? security_file_ioctl+0x94/0xc0 [ 46.355760] ksys_ioctl+0xa9/0xd0 [ 46.359197] __x64_sys_ioctl+0x73/0xb0 [ 46.363068] do_syscall_64+0x1b9/0x820 [ 46.366931] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 46.372295] ? syscall_return_slowpath+0x5e0/0x5e0 [ 46.377318] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.382141] ? trace_hardirqs_on_caller+0x310/0x310 [ 46.387152] ? prepare_exit_to_usermode+0x291/0x3b0 [ 46.392158] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.396989] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.402177] RIP: 0033:0x440089 [ 46.405351] 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 [ 46.424234] RSP: 002b:00007ffe2ec4b0c8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 46.431941] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 46.439191] RDX: 0000000000440089 RSI: 0000000000006611 RDI: 0000000000000003 [ 46.446527] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 46.453775] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 46.461027] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 46.468276] Modules linked in: [ 46.471559] ---[ end trace 1c41ff2d1f128934 ]--- [ 46.476338] RIP: 0010:rb_erase+0x306/0x3710 [ 46.480870] 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 [ 46.499791] RSP: 0018:ffff8801bbee6918 EFLAGS: 00010202 [ 46.505159] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 46.512443] RDX: 1ffff100377dcd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 46.519714] RBP: ffff8801bbee7320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 46.526963] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b8f30970 [ 46.534233] R13: dffffc0000000000 R14: ffff8801bbee72f8 R15: ffff8801bbee7438 [ 46.541509] FS: 0000000000c76880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 46.549748] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.555617] CR2: 0000000020000080 CR3: 00000001bfe80000 CR4: 00000000001406f0 [ 46.562909] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.570185] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.577438] Kernel panic - not syncing: Fatal exception [ 46.583904] Kernel Offset: disabled [ 46.587528] Rebooting in 86400 seconds..