[....] 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. [ 26.470976] kauditd_printk_skb: 7 callbacks suppressed [ 26.470988] audit: type=1800 audit(1539735972.267:29): pid=5215 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 26.497390] audit: type=1800 audit(1539735972.267:30): pid=5215 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.78' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 46.843496] kasan: CONFIG_KASAN_INLINE enabled [ 46.848281] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 46.855739] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 46.862083] CPU: 0 PID: 5369 Comm: syz-executor077 Not tainted 4.19.0-rc8+ #63 [ 46.869426] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.878865] RIP: 0010:rb_erase+0x306/0x3710 [ 46.883198] 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 [ 46.902101] RSP: 0018:ffff8801c68c6918 EFLAGS: 00010202 [ 46.907458] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 46.914715] RDX: 1ffff10038d18d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 46.921973] RBP: ffff8801c68c7320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 46.929347] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b6a4d970 [ 46.936610] R13: dffffc0000000000 R14: ffff8801c68c72f8 R15: ffff8801c68c7438 [ 46.943873] FS: 00000000017f9880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 46.952093] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.958008] CR2: 0000000020000080 CR3: 00000001d7eb9000 CR4: 00000000001406f0 [ 46.965279] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.972537] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.979791] Call Trace: [ 46.982375] ? lockdep_on+0x50/0x50 [ 46.986079] ? rb_insert_color+0x1460/0x1460 [ 46.990483] ? noop_count+0x40/0x40 [ 46.994093] ? lock_pin_lock+0x350/0x350 [ 46.998141] ? rcu_bh_qs+0xc0/0xc0 [ 47.001663] ? unwind_dump+0x190/0x190 [ 47.005537] ? kasan_check_read+0x11/0x20 [ 47.009675] ? __lock_acquire+0x2881/0x4ec0 [ 47.013996] ? noop_count+0x40/0x40 [ 47.017615] ? lock_pin_lock+0x350/0x350 [ 47.021667] ? mark_held_locks+0x130/0x130 [ 47.025887] ? check_usage_forwards+0x3e0/0x3e0 [ 47.030544] ? __bfs+0x385/0x7a0 [ 47.033907] ? check_usage+0x1a9/0x790 [ 47.037834] ? lock_pin_lock+0x350/0x350 [ 47.042015] ? check_usage_forwards+0x3e0/0x3e0 [ 47.046677] ? __bfs+0x385/0x7a0 [ 47.050032] ? modules_open+0xa0/0xa0 [ 47.053937] ? lockdep_on+0x50/0x50 [ 47.057550] ? lock_pin_lock+0x350/0x350 [ 47.061606] ? mark_held_locks+0x130/0x130 [ 47.065827] ? kasan_check_read+0x11/0x20 [ 47.069975] ? __lock_acquire+0x2881/0x4ec0 [ 47.074297] ? mark_held_locks+0x130/0x130 [ 47.078523] ? print_usage_bug+0xc0/0xc0 [ 47.082569] ? _raw_spin_unlock+0x2c/0x50 [ 47.086704] ? graph_lock+0x170/0x170 [ 47.090491] ? ext4_exit_mballoc+0xc0/0xc0 [ 47.094710] ? __lock_acquire+0x7ec/0x4ec0 [ 47.098928] ? find_held_lock+0x36/0x1c0 [ 47.102991] ? mark_held_locks+0x130/0x130 [ 47.107218] ? lock_downgrade+0x900/0x900 [ 47.111443] ? ext4_es_scan+0x960/0x960 [ 47.115413] ? do_raw_write_trylock+0x1c0/0x1c0 [ 47.120067] ? kasan_check_write+0x14/0x20 [ 47.124286] ? lock_acquire+0x1ed/0x520 [ 47.128362] ? integrity_inode_free+0x77/0x320 [ 47.132934] ? ext4_es_remove_extent+0x151/0x500 [ 47.137674] ? lock_release+0x970/0x970 [ 47.141644] ? kasan_check_write+0x14/0x20 [ 47.145863] ? do_raw_write_lock+0xbd/0x1b0 [ 47.150180] integrity_inode_free+0x12f/0x320 [ 47.154667] security_inode_free+0x19/0x90 [ 47.158966] __destroy_inode+0x328/0x820 [ 47.163036] ? generic_update_time+0x450/0x450 [ 47.167736] ? evict+0x5d8/0x980 [ 47.171097] ? lock_downgrade+0x900/0x900 [ 47.175239] ? __inode_wait_for_writeback+0x2cf/0x380 [ 47.180435] destroy_inode+0xda/0x200 [ 47.184228] ? __destroy_inode+0x820/0x820 [ 47.188454] ? kasan_check_write+0x14/0x20 [ 47.192674] ? do_raw_spin_lock+0xc1/0x200 [ 47.196927] evict+0x5e0/0x980 [ 47.200113] ? destroy_inode+0x200/0x200 [ 47.204167] ? iput+0x671/0xa90 [ 47.207436] ? lock_downgrade+0x900/0x900 [ 47.211569] ? kasan_check_read+0x11/0x20 [ 47.215845] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 47.220416] ? lock_downgrade+0x900/0x900 [ 47.224603] iput+0x679/0xa90 [ 47.227699] ? inode_add_lru+0x2a0/0x2a0 [ 47.231749] ? up_write+0x7b/0x220 [ 47.235286] ? up_read+0x110/0x110 [ 47.238809] ? up_read+0x110/0x110 [ 47.242399] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.247938] ? check_preemption_disabled+0x48/0x200 [ 47.252945] ext4_ioctl+0x236f/0x4210 [ 47.256734] ? is_bpf_text_address+0xac/0x170 [ 47.261212] ? ext4_ioctl_group_add+0x560/0x560 [ 47.265868] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 47.271745] ? kasan_check_read+0x11/0x20 [ 47.275924] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 47.281254] ? rcu_bh_qs+0xc0/0xc0 [ 47.284785] ? rcu_bh_qs+0xc0/0xc0 [ 47.288310] ? unwind_dump+0x190/0x190 [ 47.292236] ? is_bpf_text_address+0xd3/0x170 [ 47.296729] ? kernel_text_address+0x79/0xf0 [ 47.301125] ? __kernel_text_address+0xd/0x40 [ 47.305605] ? unwind_get_return_address+0x61/0xa0 [ 47.310530] ? __save_stack_trace+0x8d/0xf0 [ 47.314852] ? save_stack+0xa9/0xd0 [ 47.318467] ? save_stack+0x43/0xd0 [ 47.322079] ? __kasan_slab_free+0x102/0x150 [ 47.326469] ? kasan_slab_free+0xe/0x10 [ 47.330430] ? kmem_cache_free+0x83/0x290 [ 47.334568] ? putname+0xf2/0x130 [ 47.338017] ? do_sys_open+0x54d/0x700 [ 47.341904] ? __x64_sys_openat+0x9d/0x100 [ 47.346340] ? do_syscall_64+0x1b9/0x820 [ 47.350438] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.355803] ? trace_hardirqs_off+0xb8/0x310 [ 47.360196] ? kasan_check_read+0x11/0x20 [ 47.364337] ? do_raw_spin_unlock+0xa7/0x2f0 [ 47.368727] ? trace_hardirqs_on+0x310/0x310 [ 47.373135] ? kasan_check_write+0x14/0x20 [ 47.377357] ? trace_hardirqs_off+0xb8/0x310 [ 47.381750] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.387397] ? check_preemption_disabled+0x48/0x200 [ 47.392419] ? check_preemption_disabled+0x48/0x200 [ 47.397428] ? ext4_ioctl_group_add+0x560/0x560 [ 47.402086] do_vfs_ioctl+0x1de/0x1720 [ 47.405959] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 47.411219] ? ioctl_preallocate+0x300/0x300 [ 47.415614] ? memset+0x31/0x40 [ 47.418879] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.424414] ? smack_file_ioctl+0x210/0x3c0 [ 47.428716] ? fget_raw+0x20/0x20 [ 47.432586] ? smack_file_lock+0x2e0/0x2e0 [ 47.436809] ? do_syscall_64+0x9a/0x820 [ 47.440876] ? do_syscall_64+0x9a/0x820 [ 47.444844] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.450412] ? security_file_ioctl+0x94/0xc0 [ 47.454862] ksys_ioctl+0xa9/0xd0 [ 47.458352] __x64_sys_ioctl+0x73/0xb0 [ 47.462232] do_syscall_64+0x1b9/0x820 [ 47.466103] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 47.471451] ? syscall_return_slowpath+0x5e0/0x5e0 [ 47.476362] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.481188] ? trace_hardirqs_on_caller+0x310/0x310 [ 47.486256] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 47.491312] ? prepare_exit_to_usermode+0x291/0x3b0 [ 47.496399] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.501239] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.506413] RIP: 0033:0x440009 [ 47.509591] 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 [ 47.528484] RSP: 002b:00007fffd7edf778 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 47.536226] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 47.543496] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 47.550759] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 47.558015] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 47.565274] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 47.572534] Modules linked in: [ 47.575865] ---[ end trace 8ecc54f8d896dc28 ]--- [ 47.580707] RIP: 0010:rb_erase+0x306/0x3710 [ 47.585022] 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 [ 47.604008] RSP: 0018:ffff8801c68c6918 EFLAGS: 00010202 [ 47.609481] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 47.616778] RDX: 1ffff10038d18d2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 47.624090] RBP: ffff8801c68c7320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 47.631417] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b6a4d970 [ 47.638716] R13: dffffc0000000000 R14: ffff8801c68c72f8 R15: ffff8801c68c7438 [ 47.645975] FS: 00000000017f9880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 47.654249] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.660154] CR2: 0000000020000080 CR3: 00000001d7eb9000 CR4: 00000000001406f0 [ 47.667461] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.674725] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 47.682276] Kernel panic - not syncing: Fatal exception [ 47.688569] Kernel Offset: disabled [ 47.692198] Rebooting in 86400 seconds..