[ 36.840546] audit: type=1800 audit(1539243180.910:22): pid=5700 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [ 36.875885] audit: type=1800 audit(1539243180.910:23): pid=5700 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2442 res=0 [ 36.894711] audit: type=1800 audit(1539243180.920:24): pid=5700 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 '10.128.0.85' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 65.930850] kasan: CONFIG_KASAN_INLINE enabled [ 65.935624] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 65.943031] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 65.949333] CPU: 1 PID: 5854 Comm: syz-executor773 Not tainted 4.19.0-rc7+ #54 [ 65.956691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.966035] RIP: 0010:rb_erase+0x306/0x3710 [ 65.970345] 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 [ 65.989296] RSP: 0018:ffff8801d3666918 EFLAGS: 00010202 [ 65.994652] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 66.001960] RDX: 1ffff1003a6ccd2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 66.009217] RBP: ffff8801d3667320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 66.016473] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8a601f0 [ 66.023839] R13: dffffc0000000000 R14: ffff8801d36672f8 R15: ffff8801d3667438 [ 66.031151] FS: 0000000001050880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 66.039367] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.045233] CR2: 0000000020000700 CR3: 00000001d3b49000 CR4: 00000000001406e0 [ 66.052543] Call Trace: [ 66.055132] ? rb_insert_color+0x1460/0x1460 [ 66.059533] ? add_to_page_cache_lru+0x10b0/0x10b0 [ 66.064450] ? lock_downgrade+0x900/0x900 [ 66.068585] ? mark_held_locks+0x130/0x130 [ 66.072814] ? kasan_check_read+0x11/0x20 [ 66.077025] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 66.082290] ? rcu_bh_qs+0xc0/0xc0 [ 66.085852] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 66.091434] ? mark_held_locks+0x130/0x130 [ 66.095675] ? mark_page_accessed+0xcb0/0x2040 [ 66.100247] ? activate_page+0x1040/0x1040 [ 66.104535] ? activate_page+0x1040/0x1040 [ 66.108774] ? mark_held_locks+0x130/0x130 [ 66.112991] ? kasan_kmalloc+0xc7/0xe0 [ 66.116863] ? kmem_cache_alloc_trace+0x152/0x750 [ 66.121765] ? ima_add_digest_entry+0xcb/0x6a0 [ 66.126351] ? mark_held_locks+0x130/0x130 [ 66.130581] ? find_get_pages_contig+0x15b0/0x15b0 [ 66.135500] ? mark_held_locks+0x130/0x130 [ 66.139721] ? lock_downgrade+0x900/0x900 [ 66.143896] ? mark_held_locks+0x130/0x130 [ 66.148123] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 66.154054] ? mark_held_locks+0x130/0x130 [ 66.158280] ? ext4_discard_preallocations+0x9b9/0x13c0 [ 66.163629] ? lock_downgrade+0x900/0x900 [ 66.167777] ? kasan_check_read+0x11/0x20 [ 66.171908] ? do_raw_spin_unlock+0xa7/0x2f0 [ 66.176538] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 66.181235] ? mark_held_locks+0x130/0x130 [ 66.185458] ? _raw_spin_unlock+0x2c/0x50 [ 66.189603] ? ext4_discard_preallocations+0x18a/0x13c0 [ 66.194957] ? ext4_exit_mballoc+0xc0/0xc0 [ 66.199177] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 66.204181] ? bpf_prog_kallsyms_find+0xde/0x4a0 [ 66.208921] ? modules_open+0xa0/0xa0 [ 66.212710] ? __es_tree_search.isra.12+0x1ba/0x220 [ 66.217714] ? __es_remove_extent+0x9a3/0xba0 [ 66.222192] ? mark_held_locks+0x130/0x130 [ 66.226411] ? lock_downgrade+0x900/0x900 [ 66.231086] ? ext4_es_scan+0x960/0x960 [ 66.235074] ? lock_release+0x970/0x970 [ 66.239040] ? trace_hardirqs_on+0xbd/0x310 [ 66.243364] ? kasan_check_read+0x11/0x20 [ 66.247491] ? clear_inode+0x114/0x3a0 [ 66.251360] ? do_raw_write_trylock+0x1c0/0x1c0 [ 66.256013] ? kasan_check_write+0x14/0x20 [ 66.260230] ? lock_acquire+0x1ed/0x520 [ 66.264193] ? integrity_inode_free+0x77/0x320 [ 66.268762] ? ext4_es_remove_extent+0x151/0x500 [ 66.273501] ? lock_release+0x970/0x970 [ 66.277460] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 66.282545] ? depot_save_stack+0x292/0x470 [ 66.286860] ? kasan_check_write+0x14/0x20 [ 66.291075] ? do_raw_write_lock+0xbd/0x1b0 [ 66.295383] integrity_inode_free+0x12f/0x320 [ 66.299864] security_inode_free+0x19/0x90 [ 66.304087] __destroy_inode+0x328/0x820 [ 66.308141] ? generic_update_time+0x450/0x450 [ 66.312707] ? evict+0x5d8/0x980 [ 66.316055] ? lock_downgrade+0x900/0x900 [ 66.320184] ? __inode_wait_for_writeback+0x2cf/0x380 [ 66.325357] destroy_inode+0xda/0x200 [ 66.329141] ? __destroy_inode+0x820/0x820 [ 66.333360] ? kasan_check_write+0x14/0x20 [ 66.337581] ? do_raw_spin_lock+0xc1/0x200 [ 66.341825] evict+0x5e0/0x980 [ 66.345004] ? jbd2_journal_stop+0x430/0x15d0 [ 66.349480] ? destroy_inode+0x200/0x200 [ 66.353532] ? do_raw_spin_lock+0xc1/0x200 [ 66.357765] ? iput+0x671/0xa90 [ 66.361044] ? lock_downgrade+0x900/0x900 [ 66.365193] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 66.370714] ? kasan_check_read+0x11/0x20 [ 66.374849] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 66.379423] ? lock_downgrade+0x900/0x900 [ 66.383560] ? ext4_ioctl+0x231b/0x4210 [ 66.387527] iput+0x679/0xa90 [ 66.390618] ? inode_add_lru+0x2a0/0x2a0 [ 66.394660] ? up_write+0x7b/0x220 [ 66.398191] ? up_read+0x110/0x110 [ 66.401720] ? up_read+0x110/0x110 [ 66.405250] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.410788] ? check_preemption_disabled+0x48/0x200 [ 66.415791] ext4_ioctl+0x236f/0x4210 [ 66.419581] ? ext4_ioctl_group_add+0x560/0x560 [ 66.424240] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 66.430024] ? kasan_check_read+0x11/0x20 [ 66.434163] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 66.439423] ? rcu_bh_qs+0xc0/0xc0 [ 66.442972] ? unwind_dump+0x190/0x190 [ 66.446847] ? is_bpf_text_address+0xd3/0x170 [ 66.451324] ? kernel_text_address+0x79/0xf0 [ 66.455724] ? __kernel_text_address+0xd/0x40 [ 66.460204] ? unwind_get_return_address+0x61/0xa0 [ 66.465127] ? __save_stack_trace+0x8d/0xf0 [ 66.469436] ? save_stack+0xa9/0xd0 [ 66.473173] ? save_stack+0x43/0xd0 [ 66.476783] ? __kasan_slab_free+0x102/0x150 [ 66.481170] ? kasan_slab_free+0xe/0x10 [ 66.485128] ? kmem_cache_free+0x83/0x290 [ 66.489257] ? putname+0xf2/0x130 [ 66.492697] ? do_sys_open+0x54d/0x700 [ 66.496565] ? __x64_sys_open+0x7e/0xc0 [ 66.500519] ? do_syscall_64+0x1b9/0x820 [ 66.504630] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 66.509981] ? trace_hardirqs_off+0xb8/0x310 [ 66.514368] ? kasan_check_read+0x11/0x20 [ 66.518506] ? do_raw_spin_unlock+0xa7/0x2f0 [ 66.522893] ? trace_hardirqs_on+0x310/0x310 [ 66.527363] ? kasan_check_write+0x14/0x20 [ 66.531588] ? trace_hardirqs_off+0xb8/0x310 [ 66.535984] ? ext4_ioctl_group_add+0x560/0x560 [ 66.540646] do_vfs_ioctl+0x1de/0x1720 [ 66.544622] ? trace_hardirqs_on+0xbd/0x310 [ 66.548934] ? ioctl_preallocate+0x300/0x300 [ 66.553384] ? memset+0x31/0x40 [ 66.556679] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.562228] ? smack_file_ioctl+0x210/0x3c0 [ 66.566567] ? fget_raw+0x20/0x20 [ 66.570009] ? smack_file_lock+0x2e0/0x2e0 [ 66.574230] ? putname+0xf2/0x130 [ 66.577676] ? do_sys_open+0x3ac/0x700 [ 66.581563] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.587097] ? security_file_ioctl+0x94/0xc0 [ 66.591491] ksys_ioctl+0xa9/0xd0 [ 66.594932] __x64_sys_ioctl+0x73/0xb0 [ 66.598801] do_syscall_64+0x1b9/0x820 [ 66.602680] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 66.608138] ? syscall_return_slowpath+0x5e0/0x5e0 [ 66.613115] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 66.617948] ? trace_hardirqs_on_caller+0x310/0x310 [ 66.622948] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 66.627950] ? prepare_exit_to_usermode+0x291/0x3b0 [ 66.633028] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 66.637891] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 66.643070] RIP: 0033:0x440029 [ 66.646251] 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 [ 66.665246] RSP: 002b:00007ffd6011efc8 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 66.672940] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440029 [ 66.680196] RDX: 0000000000440029 RSI: 0000000000006611 RDI: 0000000000000004 [ 66.687450] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 66.694812] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004018b0 [ 66.702062] R13: 0000000000401940 R14: 0000000000000000 R15: 0000000000000000 [ 66.709327] Modules linked in: [ 66.712693] ---[ end trace e3239ab5ce8ef466 ]--- [ 66.717450] RIP: 0010:rb_erase+0x306/0x3710 [ 66.721760] 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 [ 66.740696] RSP: 0018:ffff8801d3666918 EFLAGS: 00010202 [ 66.746075] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 66.753353] RDX: 1ffff1003a6ccd2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 66.760628] RBP: ffff8801d3667320 R08: dffffc0000000000 R09: fffffbfff12d69b0 [ 66.767957] R10: fffffbfff12d69b0 R11: ffffffff896b4d83 R12: ffff8801b8a601f0 [ 66.775393] R13: dffffc0000000000 R14: ffff8801d36672f8 R15: ffff8801d3667438 [ 66.782689] FS: 0000000001050880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 66.790904] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.796793] CR2: 0000000020000700 CR3: 00000001d3b49000 CR4: 00000000001406e0 [ 66.804124] Kernel panic - not syncing: Fatal exception [ 66.810346] Kernel Offset: disabled [ 66.813966] Rebooting in 86400 seconds..