[....] 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. [ 26.102323] kauditd_printk_skb: 7 callbacks suppressed [ 26.102350] audit: type=1800 audit(1540059737.729:29): pid=5192 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 [ 26.129566] audit: type=1800 audit(1540059737.729:30): pid=5192 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 '10.128.10.40' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.405758] kasan: CONFIG_KASAN_INLINE enabled [ 37.410461] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 37.417811] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 37.424024] CPU: 0 PID: 5348 Comm: syz-executor507 Not tainted 4.19.0-rc8+ #149 [ 37.431470] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.440831] RIP: 0010:rb_erase+0x306/0x3710 [ 37.445149] 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 [ 37.464039] RSP: 0018:ffff8801d93fe918 EFLAGS: 00010202 [ 37.469400] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 37.476696] RDX: 1ffff1003b27fd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 37.483956] RBP: ffff8801d93ff320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 37.491211] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b72e3930 [ 37.498460] R13: dffffc0000000000 R14: ffff8801d93ff2f8 R15: ffff8801d93ff438 [ 37.505710] FS: 0000000001b56880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 37.513916] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.519775] CR2: 0000000020000080 CR3: 00000001c7f6b000 CR4: 00000000001406f0 [ 37.527032] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.534374] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.541622] Call Trace: [ 37.544209] ? lockdep_on+0x50/0x50 [ 37.547815] ? rb_insert_color+0x1460/0x1460 [ 37.552207] ? lock_downgrade+0x900/0x900 [ 37.556337] ? noop_count+0x40/0x40 [ 37.559949] ? lock_pin_lock+0x350/0x350 [ 37.563997] ? rcu_bh_qs+0xc0/0xc0 [ 37.567518] ? unwind_dump+0x190/0x190 [ 37.571387] ? kasan_check_read+0x11/0x20 [ 37.575518] ? noop_count+0x40/0x40 [ 37.579129] ? lock_pin_lock+0x350/0x350 [ 37.583171] ? mark_held_locks+0x130/0x130 [ 37.587395] ? check_usage_forwards+0x3e0/0x3e0 [ 37.592052] ? __bfs+0x385/0x7a0 [ 37.595403] ? check_usage+0x1a9/0x790 [ 37.599279] ? lock_pin_lock+0x350/0x350 [ 37.603327] ? check_usage_forwards+0x3e0/0x3e0 [ 37.607975] ? __bfs+0x385/0x7a0 [ 37.611325] ? modules_open+0xa0/0xa0 [ 37.615127] ? lockdep_on+0x50/0x50 [ 37.618755] ? lock_pin_lock+0x350/0x350 [ 37.622812] ? mark_held_locks+0x130/0x130 [ 37.627026] ? kasan_check_read+0x11/0x20 [ 37.631155] ? __lock_acquire+0x2881/0x4ec0 [ 37.635466] ? mark_held_locks+0x130/0x130 [ 37.639711] ? print_usage_bug+0xc0/0xc0 [ 37.643752] ? _raw_spin_unlock+0x2c/0x50 [ 37.647883] ? graph_lock+0x170/0x170 [ 37.651665] ? ext4_exit_mballoc+0xc0/0xc0 [ 37.655891] ? __lock_acquire+0x7ec/0x4ec0 [ 37.660107] ? find_held_lock+0x36/0x1c0 [ 37.664169] ? mark_held_locks+0x130/0x130 [ 37.668402] ? lock_downgrade+0x900/0x900 [ 37.672536] ? ext4_es_scan+0x960/0x960 [ 37.676507] ? lock_release+0x970/0x970 [ 37.680466] ? do_raw_write_trylock+0x1c0/0x1c0 [ 37.685116] ? kasan_check_write+0x14/0x20 [ 37.689332] ? lock_acquire+0x1ed/0x520 [ 37.693288] ? integrity_inode_free+0x77/0x320 [ 37.697867] ? ext4_es_remove_extent+0x151/0x500 [ 37.702611] ? lock_release+0x970/0x970 [ 37.706583] ? kasan_check_write+0x14/0x20 [ 37.710798] ? do_raw_write_lock+0xbd/0x1b0 [ 37.715102] integrity_inode_free+0x12f/0x320 [ 37.719580] security_inode_free+0x19/0x90 [ 37.723795] __destroy_inode+0x328/0x820 [ 37.727856] ? generic_update_time+0x450/0x450 [ 37.732420] ? evict+0x5d8/0x980 [ 37.735767] ? lock_downgrade+0x900/0x900 [ 37.739898] ? __inode_wait_for_writeback+0x2cf/0x380 [ 37.745075] destroy_inode+0xda/0x200 [ 37.748864] ? __destroy_inode+0x820/0x820 [ 37.753080] ? kasan_check_write+0x14/0x20 [ 37.757362] ? do_raw_spin_lock+0xc1/0x200 [ 37.761588] evict+0x5e0/0x980 [ 37.764763] ? destroy_inode+0x200/0x200 [ 37.768807] ? iput+0x671/0xa90 [ 37.772085] ? lock_downgrade+0x900/0x900 [ 37.776214] ? kasan_check_read+0x11/0x20 [ 37.780345] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 37.784910] ? lock_downgrade+0x900/0x900 [ 37.789041] iput+0x679/0xa90 [ 37.792129] ? inode_add_lru+0x2a0/0x2a0 [ 37.796238] ? up_write+0x7b/0x220 [ 37.799770] ? up_read+0x110/0x110 [ 37.803304] ? up_read+0x110/0x110 [ 37.806827] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.812358] ? check_preemption_disabled+0x48/0x200 [ 37.817412] ext4_ioctl+0x236f/0x4210 [ 37.821193] ? is_bpf_text_address+0xac/0x170 [ 37.825675] ? ext4_ioctl_group_add+0x560/0x560 [ 37.830333] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 37.836113] ? kasan_check_read+0x11/0x20 [ 37.840242] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 37.845501] ? rcu_bh_qs+0xc0/0xc0 [ 37.849132] ? rcu_bh_qs+0xc0/0xc0 [ 37.852656] ? unwind_dump+0x190/0x190 [ 37.856531] ? is_bpf_text_address+0xd3/0x170 [ 37.861200] ? kernel_text_address+0x79/0xf0 [ 37.865685] ? __kernel_text_address+0xd/0x40 [ 37.870173] ? unwind_get_return_address+0x61/0xa0 [ 37.875146] ? __save_stack_trace+0x8d/0xf0 [ 37.879477] ? save_stack+0xa9/0xd0 [ 37.883086] ? save_stack+0x43/0xd0 [ 37.886694] ? __kasan_slab_free+0x102/0x150 [ 37.891080] ? kasan_slab_free+0xe/0x10 [ 37.895044] ? kmem_cache_free+0x83/0x290 [ 37.899176] ? putname+0xf2/0x130 [ 37.902610] ? do_sys_open+0x54d/0x700 [ 37.906508] ? __x64_sys_openat+0x9d/0x100 [ 37.910727] ? do_syscall_64+0x1b9/0x820 [ 37.914772] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.920277] ? trace_hardirqs_off+0xb8/0x310 [ 37.924664] ? kasan_check_read+0x11/0x20 [ 37.928799] ? do_raw_spin_unlock+0xa7/0x2f0 [ 37.933188] ? trace_hardirqs_on+0x310/0x310 [ 37.937593] ? kasan_check_write+0x14/0x20 [ 37.941826] ? trace_hardirqs_off+0xb8/0x310 [ 37.946223] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.951745] ? check_preemption_disabled+0x48/0x200 [ 37.956743] ? check_preemption_disabled+0x48/0x200 [ 37.961742] ? ext4_ioctl_group_add+0x560/0x560 [ 37.966393] do_vfs_ioctl+0x1de/0x1720 [ 37.970265] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 37.975689] ? ioctl_preallocate+0x300/0x300 [ 37.980083] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.985602] ? __fget_light+0x2e9/0x430 [ 37.989561] ? fget_raw+0x20/0x20 [ 37.992994] ? putname+0xf2/0x130 [ 37.996577] ? rcu_read_lock_sched_held+0x108/0x120 [ 38.001577] ? kmem_cache_free+0x24f/0x290 [ 38.005792] ? putname+0xf7/0x130 [ 38.009233] ? do_syscall_64+0x9a/0x820 [ 38.013188] ? do_syscall_64+0x9a/0x820 [ 38.017145] ? lockdep_hardirqs_on+0x421/0x5c0 [ 38.021712] ? security_file_ioctl+0x94/0xc0 [ 38.026101] ksys_ioctl+0xa9/0xd0 [ 38.029537] __x64_sys_ioctl+0x73/0xb0 [ 38.033409] do_syscall_64+0x1b9/0x820 [ 38.037289] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 38.042634] ? syscall_return_slowpath+0x5e0/0x5e0 [ 38.047547] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.052375] ? trace_hardirqs_on_caller+0x310/0x310 [ 38.057371] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 38.062401] ? prepare_exit_to_usermode+0x291/0x3b0 [ 38.067400] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.072227] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.077394] RIP: 0033:0x440009 [ 38.080569] 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 [ 38.099519] RSP: 002b:00007fff8b621278 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 38.107208] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 38.114458] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 38.121705] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 38.128956] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 38.136205] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 38.143456] Modules linked in: [ 38.146779] ---[ end trace af35933f1ffa393b ]--- [ 38.151632] RIP: 0010:rb_erase+0x306/0x3710 [ 38.155958] 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 [ 38.174908] RSP: 0018:ffff8801d93fe918 EFLAGS: 00010202 [ 38.180316] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 38.187699] RDX: 1ffff1003b27fd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 38.194983] RBP: ffff8801d93ff320 R08: dffffc0000000000 R09: fffffbfff12d6990 [ 38.202253] R10: fffffbfff12d6990 R11: ffffffff896b4c83 R12: ffff8801b72e3930 [ 38.209557] R13: dffffc0000000000 R14: ffff8801d93ff2f8 R15: ffff8801d93ff438 [ 38.216842] FS: 0000000001b56880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 38.225204] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.231104] CR2: 0000000020000080 CR3: 00000001c7f6b000 CR4: 00000000001406f0 [ 38.238447] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.245749] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.253031] Kernel panic - not syncing: Fatal exception [ 38.259266] Kernel Offset: disabled [ 38.262889] Rebooting in 86400 seconds..