[ 36.980112] audit: type=1800 audit(1539343681.919:22): pid=5686 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [ 37.005610] audit: type=1800 audit(1539343681.919:23): pid=5686 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2442 res=0 [ 37.031422] audit: type=1800 audit(1539343681.919:24): pid=5686 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. [....] 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 '10.128.10.50' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 48.407616] kasan: CONFIG_KASAN_INLINE enabled [ 48.412229] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 48.419613] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 48.425944] CPU: 1 PID: 5838 Comm: syz-executor576 Not tainted 4.19.0-rc7+ #56 [ 48.433309] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.442770] RIP: 0010:rb_erase+0x306/0x3710 [ 48.447077] 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 [ 48.465962] RSP: 0018:ffff8801bebbe918 EFLAGS: 00010202 [ 48.471312] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 48.478640] RDX: 1ffff10037d77d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 48.485899] RBP: ffff8801bebbf320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 48.493234] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801c3c0c2f0 [ 48.500505] R13: dffffc0000000000 R14: ffff8801bebbf2f8 R15: ffff8801bebbf438 [ 48.507757] FS: 0000000000c17880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 48.515961] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.521929] CR2: 0000000020000080 CR3: 00000001d3669000 CR4: 00000000001406e0 [ 48.529200] Call Trace: [ 48.531781] ? rb_insert_color+0x1460/0x1460 [ 48.536206] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 48.541124] ? lock_downgrade+0x900/0x900 [ 48.545259] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 48.551037] ? mark_held_locks+0x130/0x130 [ 48.555253] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 48.560515] ? rcu_bh_qs+0xc0/0xc0 [ 48.564067] ? unwind_dump+0x190/0x190 [ 48.568059] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 48.573585] ? mark_held_locks+0x130/0x130 [ 48.577809] ? mark_page_accessed+0xcb0/0x2040 [ 48.582428] ? activate_page+0x1040/0x1040 [ 48.586653] ? activate_page+0x1040/0x1040 [ 48.590905] ? mark_held_locks+0x130/0x130 [ 48.595134] ? kasan_kmalloc+0xc7/0xe0 [ 48.599115] ? kmem_cache_alloc_trace+0x152/0x750 [ 48.603952] ? ima_add_digest_entry+0xcb/0x6a0 [ 48.608586] ? ima_add_template_entry+0x466/0x7f0 [ 48.613456] ? ima_store_template+0x224/0x310 [ 48.617939] ? pagecache_get_page+0x2d8/0xf00 [ 48.622422] ? find_get_pages_contig+0x15b0/0x15b0 [ 48.627339] ? is_bpf_text_address+0xac/0x170 [ 48.631835] ? lock_downgrade+0x900/0x900 [ 48.635973] ? mark_held_locks+0x130/0x130 [ 48.640214] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 48.645999] ? mark_held_locks+0x130/0x130 [ 48.650272] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 48.655636] ? lock_downgrade+0x900/0x900 [ 48.659769] ? kasan_check_read+0x11/0x20 [ 48.663907] ? do_raw_spin_unlock+0xa7/0x2f0 [ 48.668300] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 48.672947] ? mark_held_locks+0x130/0x130 [ 48.677177] ? _raw_spin_unlock+0x2c/0x50 [ 48.681413] ? ext4_discard_preallocations+0x18a/0x13c0 [ 48.686769] ? trace_hardirqs_on+0xbd/0x310 [ 48.691083] ? ext4_exit_mballoc+0xc0/0xc0 [ 48.695310] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 48.700327] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 48.705083] ? modules_open+0xa0/0xa0 [ 48.708874] ? __es_tree_search.isra.12+0x1ba/0x220 [ 48.713873] ? __es_remove_extent+0x9a3/0xba0 [ 48.718353] ? mark_held_locks+0x130/0x130 [ 48.722580] ? lock_downgrade+0x900/0x900 [ 48.726717] ? ext4_es_scan+0x960/0x960 [ 48.730677] ? lock_release+0x970/0x970 [ 48.734647] ? trace_hardirqs_on+0xbd/0x310 [ 48.739088] ? kasan_check_read+0x11/0x20 [ 48.743225] ? clear_inode+0x114/0x3a0 [ 48.747111] ? do_raw_write_trylock+0x1c0/0x1c0 [ 48.751761] ? kasan_check_write+0x14/0x20 [ 48.755979] ? lock_acquire+0x1ed/0x520 [ 48.759941] ? integrity_inode_free+0x77/0x320 [ 48.764559] ? ext4_es_remove_extent+0x151/0x500 [ 48.769441] ? lock_release+0x970/0x970 [ 48.773414] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 48.778525] ? depot_save_stack+0x292/0x470 [ 48.782831] ? kasan_check_write+0x14/0x20 [ 48.787047] ? do_raw_write_lock+0xbd/0x1b0 [ 48.791353] integrity_inode_free+0x12f/0x320 [ 48.795838] security_inode_free+0x19/0x90 [ 48.800060] __destroy_inode+0x328/0x820 [ 48.804105] ? generic_update_time+0x450/0x450 [ 48.808671] ? evict+0x5d8/0x980 [ 48.812067] ? lock_downgrade+0x900/0x900 [ 48.816213] ? __inode_wait_for_writeback+0x2cf/0x380 [ 48.821491] destroy_inode+0xda/0x200 [ 48.825282] ? __destroy_inode+0x820/0x820 [ 48.829508] ? kasan_check_write+0x14/0x20 [ 48.833736] ? do_raw_spin_lock+0xc1/0x200 [ 48.837956] evict+0x5e0/0x980 [ 48.841240] ? jbd2_journal_stop+0x430/0x15d0 [ 48.845720] ? destroy_inode+0x200/0x200 [ 48.849820] ? do_raw_spin_lock+0xc1/0x200 [ 48.854053] ? iput+0x671/0xa90 [ 48.857329] ? lock_downgrade+0x900/0x900 [ 48.861587] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 48.867113] ? kasan_check_read+0x11/0x20 [ 48.871255] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 48.875830] ? lock_downgrade+0x900/0x900 [ 48.879969] ? ext4_ioctl+0x231b/0x4210 [ 48.883929] iput+0x679/0xa90 [ 48.887020] ? inode_add_lru+0x2a0/0x2a0 [ 48.891062] ? up_write+0x7b/0x220 [ 48.894587] ? up_read+0x110/0x110 [ 48.898192] ? up_read+0x110/0x110 [ 48.901724] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.907315] ? check_preemption_disabled+0x48/0x200 [ 48.912324] ext4_ioctl+0x236f/0x4210 [ 48.916111] ? is_bpf_text_address+0xac/0x170 [ 48.920600] ? ext4_ioctl_group_add+0x560/0x560 [ 48.925261] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 48.931047] ? kasan_check_read+0x11/0x20 [ 48.935191] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 48.940478] ? rcu_bh_qs+0xc0/0xc0 [ 48.944007] ? unwind_dump+0x190/0x190 [ 48.947885] ? is_bpf_text_address+0xd3/0x170 [ 48.952366] ? kernel_text_address+0x79/0xf0 [ 48.956790] ? __kernel_text_address+0xd/0x40 [ 48.961276] ? unwind_get_return_address+0x61/0xa0 [ 48.966190] ? __save_stack_trace+0x8d/0xf0 [ 48.970497] ? save_stack+0xa9/0xd0 [ 48.974272] ? save_stack+0x43/0xd0 [ 48.977887] ? __kasan_slab_free+0x102/0x150 [ 48.982410] ? kasan_slab_free+0xe/0x10 [ 48.986616] ? kmem_cache_free+0x83/0x290 [ 48.990755] ? putname+0xf2/0x130 [ 48.994225] ? do_sys_open+0x54d/0x700 [ 48.998094] ? __x64_sys_openat+0x9d/0x100 [ 49.002315] ? do_syscall_64+0x1b9/0x820 [ 49.006362] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.011731] ? trace_hardirqs_off+0xb8/0x310 [ 49.016121] ? kasan_check_read+0x11/0x20 [ 49.020279] ? do_raw_spin_unlock+0xa7/0x2f0 [ 49.024682] ? trace_hardirqs_on+0x310/0x310 [ 49.029073] ? kasan_check_write+0x14/0x20 [ 49.033295] ? trace_hardirqs_off+0xb8/0x310 [ 49.037688] ? trace_hardirqs_on+0x310/0x310 [ 49.042094] ? ext4_ioctl_group_add+0x560/0x560 [ 49.046881] do_vfs_ioctl+0x1de/0x1720 [ 49.050755] ? trace_hardirqs_on+0xbd/0x310 [ 49.055063] ? ioctl_preallocate+0x300/0x300 [ 49.059460] ? memset+0x31/0x40 [ 49.062728] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.068268] ? smack_file_ioctl+0x210/0x3c0 [ 49.072619] ? fget_raw+0x20/0x20 [ 49.076067] ? smack_file_lock+0x2e0/0x2e0 [ 49.080402] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.085957] ? security_file_ioctl+0x94/0xc0 [ 49.090352] ksys_ioctl+0xa9/0xd0 [ 49.094115] __x64_sys_ioctl+0x73/0xb0 [ 49.097988] do_syscall_64+0x1b9/0x820 [ 49.101864] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 49.107218] ? syscall_return_slowpath+0x5e0/0x5e0 [ 49.112134] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.116961] ? trace_hardirqs_on_caller+0x310/0x310 [ 49.121970] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 49.126974] ? prepare_exit_to_usermode+0x291/0x3b0 [ 49.131980] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.136814] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.141988] RIP: 0033:0x440009 [ 49.145182] 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 [ 49.164072] RSP: 002b:00007fffa97a0a48 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 49.171765] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 49.179060] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 49.186393] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 49.193654] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 49.200915] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 49.208196] Modules linked in: [ 49.211549] ---[ end trace d1675cfc20decb8a ]--- [ 49.216344] RIP: 0010:rb_erase+0x306/0x3710 [ 49.220691] 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 [ 49.239634] RSP: 0018:ffff8801bebbe918 EFLAGS: 00010202 [ 49.245103] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 49.252362] RDX: 1ffff10037d77d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 49.259707] RBP: ffff8801bebbf320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 49.267091] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801c3c0c2f0 [ 49.274390] R13: dffffc0000000000 R14: ffff8801bebbf2f8 R15: ffff8801bebbf438 [ 49.281651] FS: 0000000000c17880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 49.289915] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.295802] CR2: 0000000020000080 CR3: 00000001d3669000 CR4: 00000000001406e0 [ 49.303072] Kernel panic - not syncing: Fatal exception [ 49.309296] Kernel Offset: disabled [ 49.312922] Rebooting in 86400 seconds..