[....] 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. [ 26.276378] kauditd_printk_skb: 7 callbacks suppressed [ 26.276390] audit: type=1800 audit(1538349039.174:29): pid=5217 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 26.301890] audit: type=1800 audit(1538349039.174:30): pid=5217 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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 '10.128.0.19' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.261615] kasan: CONFIG_KASAN_INLINE enabled [ 34.266376] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 34.273827] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 34.280067] CPU: 0 PID: 5372 Comm: syz-executor731 Not tainted 4.19.0-rc6+ #262 [ 34.287493] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.296837] RIP: 0010:rb_erase+0x306/0x3710 [ 34.301142] 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 [ 34.320028] RSP: 0018:ffff8801d8e1e918 EFLAGS: 00010202 [ 34.325396] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 34.332660] RDX: 1ffff1003b1c3d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 34.339911] RBP: ffff8801d8e1f320 R08: dffffc0000000000 R09: fffffbfff12d6a48 [ 34.347162] R10: fffffbfff12d6a48 R11: ffffffff896b5243 R12: ffff8801b77b9970 [ 34.354414] R13: dffffc0000000000 R14: ffff8801d8e1f2f8 R15: ffff8801d8e1f438 [ 34.361668] FS: 000000000206e880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 34.369876] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.375753] CR2: 0000000020000080 CR3: 00000001bb87c000 CR4: 00000000001406f0 [ 34.383003] Call Trace: [ 34.385578] ? lockdep_on+0x50/0x50 [ 34.389193] ? rb_insert_color+0x1460/0x1460 [ 34.393589] ? noop_count+0x40/0x40 [ 34.397207] ? lock_pin_lock+0x350/0x350 [ 34.401249] ? noop_count+0x40/0x40 [ 34.404859] ? kasan_check_read+0x11/0x20 [ 34.408990] ? noop_count+0x40/0x40 [ 34.412596] ? noop_count+0x40/0x40 [ 34.416205] ? lock_pin_lock+0x350/0x350 [ 34.420247] ? mark_held_locks+0x130/0x130 [ 34.424483] ? check_usage_forwards+0x3e0/0x3e0 [ 34.429154] ? __bfs+0x385/0x7a0 [ 34.432519] ? noop_count+0x40/0x40 [ 34.436133] ? check_usage+0x1a9/0x790 [ 34.440001] ? lock_pin_lock+0x350/0x350 [ 34.444045] ? check_usage_forwards+0x3e0/0x3e0 [ 34.448702] ? __bfs+0x385/0x7a0 [ 34.452047] ? __lock_acquire+0x7ec/0x4ec0 [ 34.456263] ? lockdep_on+0x50/0x50 [ 34.459874] ? lock_pin_lock+0x350/0x350 [ 34.463920] ? mark_held_locks+0x130/0x130 [ 34.468156] ? kasan_check_read+0x11/0x20 [ 34.472297] ? __lock_acquire+0x2881/0x4ec0 [ 34.476833] ? mark_held_locks+0x130/0x130 [ 34.481051] ? print_usage_bug+0xc0/0xc0 [ 34.485109] ? _raw_spin_unlock+0x2c/0x50 [ 34.489267] ? graph_lock+0x170/0x170 [ 34.493056] ? ext4_exit_mballoc+0xc0/0xc0 [ 34.497274] ? __lock_acquire+0x7ec/0x4ec0 [ 34.501492] ? find_held_lock+0x36/0x1c0 [ 34.505562] ? mark_held_locks+0x130/0x130 [ 34.509780] ? lock_downgrade+0x900/0x900 [ 34.513919] ? ext4_es_scan+0x960/0x960 [ 34.517884] ? do_raw_write_trylock+0x1c0/0x1c0 [ 34.522534] ? kasan_check_write+0x14/0x20 [ 34.526751] ? lock_acquire+0x1ed/0x520 [ 34.530706] ? integrity_inode_free+0x77/0x320 [ 34.535286] ? ext4_es_remove_extent+0x151/0x500 [ 34.540023] ? lock_release+0x970/0x970 [ 34.543985] ? kasan_check_write+0x14/0x20 [ 34.548201] ? do_raw_write_lock+0xbd/0x1b0 [ 34.552516] integrity_inode_free+0x12f/0x320 [ 34.556994] security_inode_free+0x19/0x90 [ 34.561211] __destroy_inode+0x328/0x820 [ 34.565254] ? generic_update_time+0x450/0x450 [ 34.569831] ? evict+0x5d8/0x980 [ 34.573181] ? lock_downgrade+0x900/0x900 [ 34.577330] ? __inode_wait_for_writeback+0x2cf/0x380 [ 34.582502] destroy_inode+0xda/0x200 [ 34.586285] ? __destroy_inode+0x820/0x820 [ 34.590499] ? kasan_check_write+0x14/0x20 [ 34.594717] ? do_raw_spin_lock+0xc1/0x200 [ 34.598932] evict+0x5e0/0x980 [ 34.602108] ? destroy_inode+0x200/0x200 [ 34.606150] ? iput+0x671/0xa90 [ 34.609432] ? lock_downgrade+0x900/0x900 [ 34.613565] ? kasan_check_read+0x11/0x20 [ 34.617722] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 34.622282] ? lock_downgrade+0x900/0x900 [ 34.626422] iput+0x679/0xa90 [ 34.629518] ? inode_add_lru+0x2a0/0x2a0 [ 34.633584] ? up_write+0x7b/0x220 [ 34.637108] ? up_read+0x110/0x110 [ 34.640625] ? up_read+0x110/0x110 [ 34.644148] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.649686] ? check_preemption_disabled+0x48/0x200 [ 34.654693] ext4_ioctl+0x236f/0x4210 [ 34.658476] ? is_bpf_text_address+0xac/0x170 [ 34.662967] ? ext4_ioctl_group_add+0x560/0x560 [ 34.667622] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 34.673402] ? kasan_check_read+0x11/0x20 [ 34.677549] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 34.682806] ? rcu_bh_qs+0xc0/0xc0 [ 34.686329] ? rcu_bh_qs+0xc0/0xc0 [ 34.689861] ? unwind_dump+0x190/0x190 [ 34.693742] ? is_bpf_text_address+0xd3/0x170 [ 34.698228] ? kernel_text_address+0x79/0xf0 [ 34.702618] ? __kernel_text_address+0xd/0x40 [ 34.707095] ? unwind_get_return_address+0x61/0xa0 [ 34.712025] ? __save_stack_trace+0x8d/0xf0 [ 34.716333] ? save_stack+0xa9/0xd0 [ 34.719938] ? save_stack+0x43/0xd0 [ 34.723547] ? __kasan_slab_free+0x102/0x150 [ 34.727936] ? kasan_slab_free+0xe/0x10 [ 34.732067] ? kmem_cache_free+0x83/0x290 [ 34.736228] ? putname+0xf2/0x130 [ 34.739673] ? do_sys_open+0x54d/0x700 [ 34.743539] ? __x64_sys_openat+0x9d/0x100 [ 34.747753] ? do_syscall_64+0x1b9/0x820 [ 34.751792] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.757154] ? trace_hardirqs_off+0xb8/0x310 [ 34.761542] ? kasan_check_read+0x11/0x20 [ 34.765674] ? do_raw_spin_unlock+0xa7/0x2f0 [ 34.770062] ? trace_hardirqs_on+0x310/0x310 [ 34.774450] ? kasan_check_write+0x14/0x20 [ 34.778668] ? trace_hardirqs_off+0xb8/0x310 [ 34.783058] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.788579] ? check_preemption_disabled+0x48/0x200 [ 34.793584] ? check_preemption_disabled+0x48/0x200 [ 34.798583] ? ext4_ioctl_group_add+0x560/0x560 [ 34.803232] do_vfs_ioctl+0x1de/0x1720 [ 34.807102] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 34.812372] ? ioctl_preallocate+0x300/0x300 [ 34.816762] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.822276] ? __fget_light+0x2e9/0x430 [ 34.826230] ? fget_raw+0x20/0x20 [ 34.829664] ? putname+0xf2/0x130 [ 34.833096] ? rcu_read_lock_sched_held+0x108/0x120 [ 34.838091] ? kmem_cache_free+0x24f/0x290 [ 34.842318] ? putname+0xf7/0x130 [ 34.845757] ? do_syscall_64+0x9a/0x820 [ 34.849710] ? do_syscall_64+0x9a/0x820 [ 34.853679] ? lockdep_hardirqs_on+0x421/0x5c0 [ 34.858253] ? security_file_ioctl+0x94/0xc0 [ 34.862641] ksys_ioctl+0xa9/0xd0 [ 34.866080] __x64_sys_ioctl+0x73/0xb0 [ 34.869946] do_syscall_64+0x1b9/0x820 [ 34.873832] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 34.879179] ? syscall_return_slowpath+0x5e0/0x5e0 [ 34.884090] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.888914] ? trace_hardirqs_on_caller+0x310/0x310 [ 34.893910] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 34.898911] ? prepare_exit_to_usermode+0x291/0x3b0 [ 34.903909] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.908735] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.913903] RIP: 0033:0x440019 [ 34.917078] 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 [ 34.935987] RSP: 002b:00007ffdf0cd97c8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 34.943691] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440019 [ 34.950960] RDX: 0000000000440019 RSI: 0000000000006611 RDI: 0000000000000003 [ 34.958219] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 34.965472] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004018a0 [ 34.972721] R13: 0000000000401930 R14: 0000000000000000 R15: 0000000000000000 [ 34.979976] Modules linked in: [ 34.983261] ---[ end trace 69f552217ad822a3 ]--- [ 34.988055] RIP: 0010:rb_erase+0x306/0x3710 [ 34.992363] 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 [ 35.011279] RSP: 0018:ffff8801d8e1e918 EFLAGS: 00010202 [ 35.016661] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 35.023945] RDX: 1ffff1003b1c3d2b RSI: ffffffff8afbc8a0 RDI: 0000000000000008 [ 35.031219] RBP: ffff8801d8e1f320 R08: dffffc0000000000 R09: fffffbfff12d6a48 [ 35.038500] R10: fffffbfff12d6a48 R11: ffffffff896b5243 R12: ffff8801b77b9970 [ 35.045793] R13: dffffc0000000000 R14: ffff8801d8e1f2f8 R15: ffff8801d8e1f438 [ 35.053049] FS: 000000000206e880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 35.061298] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.067193] CR2: 0000000020000080 CR3: 00000001bb87c000 CR4: 00000000001406f0 [ 35.074476] Kernel panic - not syncing: Fatal exception [ 35.080720] Kernel Offset: disabled [ 35.084360] Rebooting in 86400 seconds..