[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 35.272713] audit: type=1800 audit(1539287397.471:25): pid=5659 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 35.291102] audit: type=1800 audit(1539287397.471:26): pid=5659 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 35.319204] audit: type=1800 audit(1539287397.471:27): pid=5659 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.10.55' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 57.200560] kasan: CONFIG_KASAN_INLINE enabled [ 57.205274] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 57.212700] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 57.218945] CPU: 1 PID: 5812 Comm: syz-executor543 Not tainted 4.19.0-rc7+ #55 [ 57.226283] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.235625] RIP: 0010:rb_erase+0x306/0x3710 [ 57.239931] 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 [ 57.258817] RSP: 0018:ffff8801d331e918 EFLAGS: 00010202 [ 57.264169] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 57.271420] RDX: 1ffff1003a663d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 57.278669] RBP: ffff8801d331f320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 57.285919] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8b40970 [ 57.293172] R13: dffffc0000000000 R14: ffff8801d331f2f8 R15: ffff8801d331f438 [ 57.300431] FS: 0000000000e59880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 57.308651] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.314521] CR2: 0000000020000080 CR3: 00000001d33c5000 CR4: 00000000001406e0 [ 57.321776] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 57.329030] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 57.336280] Call Trace: [ 57.338857] ? rb_insert_color+0x1460/0x1460 [ 57.343265] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 57.348181] ? lock_downgrade+0x900/0x900 [ 57.352312] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 57.358094] ? mark_held_locks+0x130/0x130 [ 57.362314] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 57.367575] ? rcu_bh_qs+0xc0/0xc0 [ 57.371095] ? unwind_dump+0x190/0x190 [ 57.374967] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 57.380489] ? mark_held_locks+0x130/0x130 [ 57.384705] ? mark_page_accessed+0xcb0/0x2040 [ 57.389273] ? activate_page+0x1040/0x1040 [ 57.393490] ? activate_page+0x1040/0x1040 [ 57.397710] ? mark_held_locks+0x130/0x130 [ 57.401932] ? kasan_kmalloc+0xc7/0xe0 [ 57.405811] ? kmem_cache_alloc_trace+0x152/0x750 [ 57.410642] ? ima_add_digest_entry+0xcb/0x6a0 [ 57.415203] ? ima_add_template_entry+0x466/0x7f0 [ 57.420027] ? ima_store_template+0x224/0x310 [ 57.424508] ? pagecache_get_page+0x2d8/0xf00 [ 57.429137] ? find_get_pages_contig+0x15b0/0x15b0 [ 57.434058] ? is_bpf_text_address+0xac/0x170 [ 57.438536] ? lock_downgrade+0x900/0x900 [ 57.442663] ? mark_held_locks+0x130/0x130 [ 57.446886] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 57.452668] ? mark_held_locks+0x130/0x130 [ 57.456895] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 57.462243] ? lock_downgrade+0x900/0x900 [ 57.466373] ? kasan_check_read+0x11/0x20 [ 57.470616] ? do_raw_spin_unlock+0xa7/0x2f0 [ 57.475014] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 57.479580] ? mark_held_locks+0x130/0x130 [ 57.483802] ? _raw_spin_unlock+0x2c/0x50 [ 57.487983] ? ext4_discard_preallocations+0x18a/0x13c0 [ 57.493348] ? trace_hardirqs_on+0xbd/0x310 [ 57.497656] ? ext4_exit_mballoc+0xc0/0xc0 [ 57.501880] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 57.506885] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 57.511641] ? modules_open+0xa0/0xa0 [ 57.515426] ? __es_tree_search.isra.12+0x1ba/0x220 [ 57.520426] ? __es_remove_extent+0x9a3/0xba0 [ 57.524907] ? mark_held_locks+0x130/0x130 [ 57.529126] ? lock_downgrade+0x900/0x900 [ 57.533266] ? ext4_es_scan+0x960/0x960 [ 57.537223] ? lock_release+0x970/0x970 [ 57.541183] ? trace_hardirqs_on+0xbd/0x310 [ 57.545486] ? kasan_check_read+0x11/0x20 [ 57.549616] ? clear_inode+0x114/0x3a0 [ 57.553601] ? do_raw_write_trylock+0x1c0/0x1c0 [ 57.558258] ? kasan_check_write+0x14/0x20 [ 57.562477] ? lock_acquire+0x1ed/0x520 [ 57.566433] ? integrity_inode_free+0x77/0x320 [ 57.571003] ? ext4_es_remove_extent+0x151/0x500 [ 57.575740] ? lock_release+0x970/0x970 [ 57.579698] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 57.584786] ? depot_save_stack+0x292/0x470 [ 57.589097] ? kasan_check_write+0x14/0x20 [ 57.593321] ? do_raw_write_lock+0xbd/0x1b0 [ 57.597632] integrity_inode_free+0x12f/0x320 [ 57.602112] security_inode_free+0x19/0x90 [ 57.606330] __destroy_inode+0x328/0x820 [ 57.610377] ? generic_update_time+0x450/0x450 [ 57.614940] ? evict+0x5d8/0x980 [ 57.618289] ? lock_downgrade+0x900/0x900 [ 57.622420] ? __inode_wait_for_writeback+0x2cf/0x380 [ 57.627595] destroy_inode+0xda/0x200 [ 57.631376] ? __destroy_inode+0x820/0x820 [ 57.635590] ? kasan_check_write+0x14/0x20 [ 57.639808] ? do_raw_spin_lock+0xc1/0x200 [ 57.644028] evict+0x5e0/0x980 [ 57.647205] ? jbd2_journal_stop+0x430/0x15d0 [ 57.651681] ? destroy_inode+0x200/0x200 [ 57.655724] ? do_raw_spin_lock+0xc1/0x200 [ 57.659941] ? iput+0x671/0xa90 [ 57.663211] ? lock_downgrade+0x900/0x900 [ 57.667344] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 57.672872] ? kasan_check_read+0x11/0x20 [ 57.677017] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 57.681584] ? lock_downgrade+0x900/0x900 [ 57.685715] ? ext4_ioctl+0x231b/0x4210 [ 57.689674] iput+0x679/0xa90 [ 57.692764] ? inode_add_lru+0x2a0/0x2a0 [ 57.696809] ? up_write+0x7b/0x220 [ 57.700335] ? up_read+0x110/0x110 [ 57.703856] ? up_read+0x110/0x110 [ 57.707390] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.712921] ? check_preemption_disabled+0x48/0x200 [ 57.717922] ext4_ioctl+0x236f/0x4210 [ 57.721707] ? is_bpf_text_address+0xac/0x170 [ 57.726191] ? ext4_ioctl_group_add+0x560/0x560 [ 57.730845] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 57.736630] ? kasan_check_read+0x11/0x20 [ 57.740763] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 57.746019] ? rcu_bh_qs+0xc0/0xc0 [ 57.749543] ? unwind_dump+0x190/0x190 [ 57.753419] ? is_bpf_text_address+0xd3/0x170 [ 57.757901] ? kernel_text_address+0x79/0xf0 [ 57.762292] ? __kernel_text_address+0xd/0x40 [ 57.766774] ? unwind_get_return_address+0x61/0xa0 [ 57.771690] ? __save_stack_trace+0x8d/0xf0 [ 57.775995] ? save_stack+0xa9/0xd0 [ 57.779605] ? save_stack+0x43/0xd0 [ 57.783263] ? __kasan_slab_free+0x102/0x150 [ 57.787662] ? kasan_slab_free+0xe/0x10 [ 57.791667] ? kmem_cache_free+0x83/0x290 [ 57.795803] ? putname+0xf2/0x130 [ 57.799239] ? do_sys_open+0x54d/0x700 [ 57.803108] ? __x64_sys_openat+0x9d/0x100 [ 57.807327] ? do_syscall_64+0x1b9/0x820 [ 57.811379] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 57.816733] ? trace_hardirqs_off+0xb8/0x310 [ 57.821127] ? kasan_check_read+0x11/0x20 [ 57.825260] ? do_raw_spin_unlock+0xa7/0x2f0 [ 57.829668] ? trace_hardirqs_on+0x310/0x310 [ 57.834064] ? kasan_check_write+0x14/0x20 [ 57.838287] ? trace_hardirqs_off+0xb8/0x310 [ 57.842679] ? trace_hardirqs_on+0x310/0x310 [ 57.847071] ? ext4_ioctl_group_add+0x560/0x560 [ 57.851723] do_vfs_ioctl+0x1de/0x1720 [ 57.855593] ? trace_hardirqs_on+0xbd/0x310 [ 57.859898] ? ioctl_preallocate+0x300/0x300 [ 57.864287] ? memset+0x31/0x40 [ 57.867555] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.873079] ? smack_file_ioctl+0x210/0x3c0 [ 57.877386] ? fget_raw+0x20/0x20 [ 57.880822] ? smack_file_lock+0x2e0/0x2e0 [ 57.885043] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.890564] ? security_file_ioctl+0x94/0xc0 [ 57.894963] ksys_ioctl+0xa9/0xd0 [ 57.898403] __x64_sys_ioctl+0x73/0xb0 [ 57.902275] do_syscall_64+0x1b9/0x820 [ 57.906153] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 57.911504] ? syscall_return_slowpath+0x5e0/0x5e0 [ 57.916427] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 57.921265] ? trace_hardirqs_on_caller+0x310/0x310 [ 57.926271] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 57.931278] ? prepare_exit_to_usermode+0x291/0x3b0 [ 57.936277] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 57.941103] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 57.946272] RIP: 0033:0x440089 [ 57.949450] 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 [ 57.968339] RSP: 002b:00007fffe12ebad8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 57.976033] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 57.983283] RDX: 0000000000440089 RSI: 0000000000006611 RDI: 0000000000000003 [ 57.990544] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 57.997798] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 58.005050] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 58.012305] Modules linked in: [ 58.015633] ---[ end trace 1a5f60ca5ecde4eb ]--- [ 58.020420] RIP: 0010:rb_erase+0x306/0x3710 [ 58.024727] 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 [ 58.043654] RSP: 0018:ffff8801d331e918 EFLAGS: 00010202 [ 58.049032] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 58.056287] RDX: 1ffff1003a663d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 58.063571] RBP: ffff8801d331f320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 58.070868] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8b40970 [ 58.078153] R13: dffffc0000000000 R14: ffff8801d331f2f8 R15: ffff8801d331f438 [ 58.085421] FS: 0000000000e59880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 58.093665] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.099558] CR2: 0000000020000080 CR3: 00000001d33c5000 CR4: 00000000001406e0 [ 58.106812] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 58.114103] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 58.121385] Kernel panic - not syncing: Fatal exception [ 58.127642] Kernel Offset: disabled [ 58.131263] Rebooting in 86400 seconds..