[ 37.929368] audit: type=1800 audit(1539051915.295:24): pid=5687 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="sudo" dev="sda1" ino=2454 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 38.320532] audit: type=1800 audit(1539051915.775:25): pid=5687 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 38.345324] audit: type=1800 audit(1539051915.775:26): pid=5687 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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 '10.128.10.17' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 50.831305] kasan: CONFIG_KASAN_INLINE enabled [ 50.836019] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 50.843424] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 50.849662] CPU: 0 PID: 5841 Comm: syz-executor073 Not tainted 4.19.0-rc7+ #51 [ 50.856999] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.866345] RIP: 0010:rb_erase+0x306/0x3710 [ 50.870652] 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 [ 50.889537] RSP: 0018:ffff8801bb596918 EFLAGS: 00010202 [ 50.894881] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 50.902130] RDX: 1ffff100376b2d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 50.909385] RBP: ffff8801bb597320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 50.916654] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8b17970 [ 50.923909] R13: dffffc0000000000 R14: ffff8801bb5972f8 R15: ffff8801bb597438 [ 50.931167] FS: 0000000000a2b880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 50.939477] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.945343] CR2: 0000000020000080 CR3: 00000001d49af000 CR4: 00000000001406f0 [ 50.952594] Call Trace: [ 50.955173] ? rb_insert_color+0x1460/0x1460 [ 50.959581] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 50.964514] ? lock_downgrade+0x900/0x900 [ 50.968647] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 50.974426] ? mark_held_locks+0x130/0x130 [ 50.978644] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 50.983902] ? rcu_bh_qs+0xc0/0xc0 [ 50.987422] ? unwind_dump+0x190/0x190 [ 50.991297] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 50.996896] ? mark_held_locks+0x130/0x130 [ 51.001125] ? mark_page_accessed+0xcb0/0x2040 [ 51.005701] ? activate_page+0x1040/0x1040 [ 51.009917] ? activate_page+0x1040/0x1040 [ 51.014140] ? mark_held_locks+0x130/0x130 [ 51.018356] ? kasan_kmalloc+0xc7/0xe0 [ 51.022237] ? kmem_cache_alloc_trace+0x152/0x750 [ 51.027078] ? ima_add_digest_entry+0xcb/0x6a0 [ 51.031656] ? ima_add_template_entry+0x466/0x7f0 [ 51.036475] ? ima_store_template+0x224/0x310 [ 51.040967] ? pagecache_get_page+0x2d8/0xf00 [ 51.045454] ? find_get_pages_contig+0x15b0/0x15b0 [ 51.050375] ? is_bpf_text_address+0xac/0x170 [ 51.054851] ? lock_downgrade+0x900/0x900 [ 51.058980] ? mark_held_locks+0x130/0x130 [ 51.063195] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 51.068973] ? mark_held_locks+0x130/0x130 [ 51.073192] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 51.078534] ? lock_downgrade+0x900/0x900 [ 51.082668] ? kasan_check_read+0x11/0x20 [ 51.086796] ? do_raw_spin_unlock+0xa7/0x2f0 [ 51.091186] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 51.095748] ? mark_held_locks+0x130/0x130 [ 51.100007] ? _raw_spin_unlock+0x2c/0x50 [ 51.104143] ? ext4_discard_preallocations+0x18a/0x13c0 [ 51.109490] ? trace_hardirqs_on+0xbd/0x310 [ 51.113980] ? ext4_exit_mballoc+0xc0/0xc0 [ 51.118200] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 51.123199] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 51.127964] ? modules_open+0xa0/0xa0 [ 51.131788] ? __es_tree_search.isra.12+0x1ba/0x220 [ 51.136846] ? __es_remove_extent+0x9a3/0xba0 [ 51.141373] ? mark_held_locks+0x130/0x130 [ 51.145598] ? lock_downgrade+0x900/0x900 [ 51.149728] ? ext4_es_scan+0x960/0x960 [ 51.153687] ? lock_release+0x970/0x970 [ 51.157774] ? trace_hardirqs_on+0xbd/0x310 [ 51.162081] ? kasan_check_read+0x11/0x20 [ 51.166229] ? clear_inode+0x114/0x3a0 [ 51.170114] ? do_raw_write_trylock+0x1c0/0x1c0 [ 51.174766] ? kasan_check_write+0x14/0x20 [ 51.178983] ? lock_acquire+0x1ed/0x520 [ 51.182937] ? integrity_inode_free+0x77/0x320 [ 51.187511] ? ext4_es_remove_extent+0x151/0x500 [ 51.192250] ? lock_release+0x970/0x970 [ 51.196204] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 51.201335] ? depot_save_stack+0x292/0x470 [ 51.205645] ? kasan_check_write+0x14/0x20 [ 51.209865] ? do_raw_write_lock+0xbd/0x1b0 [ 51.214188] integrity_inode_free+0x12f/0x320 [ 51.218674] security_inode_free+0x19/0x90 [ 51.222950] __destroy_inode+0x328/0x820 [ 51.227001] ? generic_update_time+0x450/0x450 [ 51.231564] ? evict+0x5d8/0x980 [ 51.234913] ? lock_downgrade+0x900/0x900 [ 51.239053] ? __inode_wait_for_writeback+0x2cf/0x380 [ 51.244227] destroy_inode+0xda/0x200 [ 51.248021] ? __destroy_inode+0x820/0x820 [ 51.252276] ? kasan_check_write+0x14/0x20 [ 51.256490] ? do_raw_spin_lock+0xc1/0x200 [ 51.260706] evict+0x5e0/0x980 [ 51.263881] ? jbd2_journal_stop+0x430/0x15d0 [ 51.268360] ? destroy_inode+0x200/0x200 [ 51.272402] ? do_raw_spin_lock+0xc1/0x200 [ 51.276616] ? iput+0x671/0xa90 [ 51.279885] ? lock_downgrade+0x900/0x900 [ 51.284015] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 51.289535] ? kasan_check_read+0x11/0x20 [ 51.293663] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 51.298226] ? lock_downgrade+0x900/0x900 [ 51.302353] ? ext4_ioctl+0x231b/0x4210 [ 51.306310] iput+0x679/0xa90 [ 51.309403] ? inode_add_lru+0x2a0/0x2a0 [ 51.313568] ? up_write+0x7b/0x220 [ 51.317092] ? up_read+0x110/0x110 [ 51.320641] ? up_read+0x110/0x110 [ 51.324189] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.329711] ? check_preemption_disabled+0x48/0x200 [ 51.334712] ext4_ioctl+0x236f/0x4210 [ 51.338499] ? is_bpf_text_address+0xac/0x170 [ 51.342977] ? ext4_ioctl_group_add+0x560/0x560 [ 51.347632] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 51.353413] ? kasan_check_read+0x11/0x20 [ 51.357542] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 51.362802] ? rcu_bh_qs+0xc0/0xc0 [ 51.366322] ? unwind_dump+0x190/0x190 [ 51.370197] ? is_bpf_text_address+0xd3/0x170 [ 51.374674] ? kernel_text_address+0x79/0xf0 [ 51.379069] ? __kernel_text_address+0xd/0x40 [ 51.383549] ? unwind_get_return_address+0x61/0xa0 [ 51.388463] ? __save_stack_trace+0x8d/0xf0 [ 51.392766] ? save_stack+0xa9/0xd0 [ 51.396371] ? save_stack+0x43/0xd0 [ 51.399980] ? __kasan_slab_free+0x102/0x150 [ 51.404365] ? kasan_slab_free+0xe/0x10 [ 51.408323] ? kmem_cache_free+0x83/0x290 [ 51.412455] ? putname+0xf2/0x130 [ 51.415885] ? do_sys_open+0x54d/0x700 [ 51.419751] ? __x64_sys_openat+0x9d/0x100 [ 51.423965] ? do_syscall_64+0x1b9/0x820 [ 51.428010] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 51.433359] ? trace_hardirqs_off+0xb8/0x310 [ 51.437749] ? kasan_check_read+0x11/0x20 [ 51.441882] ? do_raw_spin_unlock+0xa7/0x2f0 [ 51.446275] ? trace_hardirqs_on+0x310/0x310 [ 51.450667] ? kasan_check_write+0x14/0x20 [ 51.454883] ? trace_hardirqs_off+0xb8/0x310 [ 51.459273] ? trace_hardirqs_on+0x310/0x310 [ 51.463662] ? ext4_ioctl_group_add+0x560/0x560 [ 51.468314] do_vfs_ioctl+0x1de/0x1720 [ 51.472184] ? trace_hardirqs_on+0xbd/0x310 [ 51.476488] ? ioctl_preallocate+0x300/0x300 [ 51.480888] ? memset+0x31/0x40 [ 51.484148] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.489666] ? smack_file_ioctl+0x210/0x3c0 [ 51.493965] ? fget_raw+0x20/0x20 [ 51.497407] ? smack_file_lock+0x2e0/0x2e0 [ 51.501637] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.507166] ? security_file_ioctl+0x94/0xc0 [ 51.511567] ksys_ioctl+0xa9/0xd0 [ 51.515005] __x64_sys_ioctl+0x73/0xb0 [ 51.518877] do_syscall_64+0x1b9/0x820 [ 51.522750] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 51.528100] ? syscall_return_slowpath+0x5e0/0x5e0 [ 51.533011] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 51.537859] ? trace_hardirqs_on_caller+0x310/0x310 [ 51.542880] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 51.547885] ? prepare_exit_to_usermode+0x291/0x3b0 [ 51.552882] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 51.557705] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 51.562872] RIP: 0033:0x440009 [ 51.566097] 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 [ 51.584989] RSP: 002b:00007ffcf4083208 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 51.592679] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 51.599931] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 51.607179] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 51.614428] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 51.621679] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 51.628931] Modules linked in: [ 51.632204] ---[ end trace 7d4dc646036b93db ]--- [ 51.636986] RIP: 0010:rb_erase+0x306/0x3710 [ 51.641383] 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 [ 51.660339] RSP: 0018:ffff8801bb596918 EFLAGS: 00010202 [ 51.665711] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 51.673104] RDX: 1ffff100376b2d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 51.680407] RBP: ffff8801bb597320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 51.687674] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8b17970 [ 51.694955] R13: dffffc0000000000 R14: ffff8801bb5972f8 R15: ffff8801bb597438 [ 51.702240] FS: 0000000000a2b880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 51.710481] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.716359] CR2: 0000000020000080 CR3: 00000001d49af000 CR4: 00000000001406f0 [ 51.723643] Kernel panic - not syncing: Fatal exception [ 51.729887] Kernel Offset: disabled [ 51.733506] Rebooting in 86400 seconds..