[....] 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. [ 27.352144] kauditd_printk_skb: 7 callbacks suppressed [ 27.352169] audit: type=1800 audit(1537947264.404:29): pid=5237 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 27.377896] audit: type=1800 audit(1537947264.404:30): pid=5237 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 '10.128.10.1' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 35.431656] kasan: CONFIG_KASAN_INLINE enabled [ 35.436369] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.443797] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.450098] CPU: 0 PID: 5390 Comm: syz-executor223 Not tainted 4.19.0-rc5+ #31 [ 35.457464] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.466811] RIP: 0010:rb_erase+0x306/0x3710 [ 35.471117] 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 [ 35.490000] RSP: 0018:ffff8801d83ee918 EFLAGS: 00010202 [ 35.495346] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 35.502598] RDX: 1ffff1003b07dd2b RSI: ffffffff8b5a08a0 RDI: 0000000000000008 [ 35.509868] RBP: ffff8801d83ef320 R08: dffffc0000000000 R09: fffffbfff135d5c8 [ 35.517140] R10: fffffbfff135d5c8 R11: ffffffff89aeae43 R12: ffff8801b6b4d1f0 [ 35.524405] R13: dffffc0000000000 R14: ffff8801d83ef2f8 R15: ffff8801d83ef438 [ 35.531678] FS: 0000000001066880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 35.539916] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.545779] CR2: 0000000020000080 CR3: 00000001d70ec000 CR4: 00000000001406f0 [ 35.553030] Call Trace: [ 35.555602] ? lockdep_on+0x50/0x50 [ 35.559213] ? rb_insert_color+0x1460/0x1460 [ 35.563605] ? noop_count+0x40/0x40 [ 35.567218] ? lock_pin_lock+0x350/0x350 [ 35.571265] ? noop_count+0x40/0x40 [ 35.574889] ? kasan_check_read+0x11/0x20 [ 35.579038] ? noop_count+0x40/0x40 [ 35.582650] ? noop_count+0x40/0x40 [ 35.586260] ? lock_pin_lock+0x350/0x350 [ 35.590315] ? mark_held_locks+0x130/0x130 [ 35.594538] ? check_usage_forwards+0x3e0/0x3e0 [ 35.599211] ? __bfs+0x385/0x7a0 [ 35.602557] ? noop_count+0x40/0x40 [ 35.606396] ? check_usage+0x1a9/0x790 [ 35.610272] ? lock_pin_lock+0x350/0x350 [ 35.614319] ? check_usage_forwards+0x3e0/0x3e0 [ 35.618967] ? __bfs+0x385/0x7a0 [ 35.622313] ? __lock_acquire+0x7ec/0x4ec0 [ 35.626557] ? lockdep_on+0x50/0x50 [ 35.630175] ? lock_pin_lock+0x350/0x350 [ 35.634239] ? mark_held_locks+0x130/0x130 [ 35.638462] ? kasan_check_read+0x11/0x20 [ 35.642590] ? __lock_acquire+0x2881/0x4ec0 [ 35.646897] ? mark_held_locks+0x130/0x130 [ 35.651130] ? print_usage_bug+0xc0/0xc0 [ 35.655208] ? _raw_spin_unlock+0x2c/0x50 [ 35.659340] ? graph_lock+0x170/0x170 [ 35.663125] ? ext4_exit_mballoc+0xc0/0xc0 [ 35.667352] ? __lock_acquire+0x7ec/0x4ec0 [ 35.671568] ? find_held_lock+0x36/0x1c0 [ 35.675615] ? mark_held_locks+0x130/0x130 [ 35.679853] ? lock_downgrade+0x900/0x900 [ 35.683985] ? ext4_es_scan+0x960/0x960 [ 35.687941] ? lock_release+0x970/0x970 [ 35.691898] ? do_raw_write_trylock+0x1c0/0x1c0 [ 35.696547] ? kasan_check_write+0x14/0x20 [ 35.700790] ? lock_acquire+0x1ed/0x520 [ 35.704750] ? integrity_inode_free+0x77/0x320 [ 35.709339] ? ext4_es_remove_extent+0x151/0x500 [ 35.714082] ? lock_release+0x970/0x970 [ 35.718040] ? kasan_check_write+0x14/0x20 [ 35.722258] ? do_raw_write_lock+0xbd/0x1b0 [ 35.726565] integrity_inode_free+0x12f/0x320 [ 35.731058] security_inode_free+0x19/0x90 [ 35.735278] __destroy_inode+0x328/0x820 [ 35.739322] ? generic_update_time+0x450/0x450 [ 35.743893] ? evict+0x5d8/0x980 [ 35.747242] ? lock_downgrade+0x900/0x900 [ 35.751390] ? __inode_wait_for_writeback+0x2cf/0x380 [ 35.756815] destroy_inode+0xda/0x200 [ 35.760600] ? __destroy_inode+0x820/0x820 [ 35.764841] ? kasan_check_write+0x14/0x20 [ 35.769057] ? do_raw_spin_lock+0xc1/0x200 [ 35.773274] evict+0x5e0/0x980 [ 35.776451] ? destroy_inode+0x200/0x200 [ 35.780491] ? iput+0x671/0xa90 [ 35.783765] ? lock_downgrade+0x900/0x900 [ 35.787911] ? kasan_check_read+0x11/0x20 [ 35.792043] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 35.796624] ? lock_downgrade+0x900/0x900 [ 35.800757] iput+0x679/0xa90 [ 35.803847] ? inode_add_lru+0x2a0/0x2a0 [ 35.807890] ? up_write+0x7b/0x220 [ 35.811409] ? up_read+0x110/0x110 [ 35.814959] ? up_read+0x110/0x110 [ 35.818501] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.824023] ? check_preemption_disabled+0x48/0x200 [ 35.829021] ext4_ioctl+0x236f/0x4210 [ 35.832807] ? is_bpf_text_address+0xac/0x170 [ 35.837282] ? ext4_ioctl_group_add+0x560/0x560 [ 35.841933] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 35.847709] ? kasan_check_read+0x11/0x20 [ 35.851837] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 35.857095] ? rcu_bh_qs+0xc0/0xc0 [ 35.860618] ? rcu_bh_qs+0xc0/0xc0 [ 35.864140] ? unwind_dump+0x190/0x190 [ 35.868047] ? is_bpf_text_address+0xd3/0x170 [ 35.872525] ? kernel_text_address+0x79/0xf0 [ 35.876914] ? __kernel_text_address+0xd/0x40 [ 35.881389] ? unwind_get_return_address+0x61/0xa0 [ 35.886311] ? __save_stack_trace+0x8d/0xf0 [ 35.890627] ? save_stack+0xa9/0xd0 [ 35.894237] ? save_stack+0x43/0xd0 [ 35.897856] ? __kasan_slab_free+0x102/0x150 [ 35.902246] ? kasan_slab_free+0xe/0x10 [ 35.906202] ? kmem_cache_free+0x83/0x290 [ 35.910328] ? putname+0xf2/0x130 [ 35.913762] ? do_sys_open+0x54d/0x700 [ 35.917639] ? __x64_sys_openat+0x9d/0x100 [ 35.921854] ? do_syscall_64+0x1b9/0x820 [ 35.925915] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 35.931263] ? trace_hardirqs_off+0xb8/0x310 [ 35.935667] ? kasan_check_read+0x11/0x20 [ 35.939803] ? do_raw_spin_unlock+0xa7/0x2f0 [ 35.944197] ? trace_hardirqs_on+0x310/0x310 [ 35.948583] ? kasan_check_write+0x14/0x20 [ 35.952796] ? trace_hardirqs_off+0xb8/0x310 [ 35.957187] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.962723] ? check_preemption_disabled+0x48/0x200 [ 35.967724] ? check_preemption_disabled+0x48/0x200 [ 35.972739] ? ext4_ioctl_group_add+0x560/0x560 [ 35.977395] do_vfs_ioctl+0x1de/0x1720 [ 35.981265] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 35.986524] ? ioctl_preallocate+0x300/0x300 [ 35.990910] ? memset+0x31/0x40 [ 35.994185] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.999717] ? smack_file_ioctl+0x210/0x3c0 [ 36.004039] ? fget_raw+0x20/0x20 [ 36.007486] ? smack_file_lock+0x2e0/0x2e0 [ 36.011703] ? do_syscall_64+0x9a/0x820 [ 36.015656] ? do_syscall_64+0x9a/0x820 [ 36.019614] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.025135] ? security_file_ioctl+0x94/0xc0 [ 36.029527] ksys_ioctl+0xa9/0xd0 [ 36.032962] __x64_sys_ioctl+0x73/0xb0 [ 36.036827] do_syscall_64+0x1b9/0x820 [ 36.040692] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 36.046062] ? syscall_return_slowpath+0x5e0/0x5e0 [ 36.051000] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.055822] ? trace_hardirqs_on_caller+0x310/0x310 [ 36.060816] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 36.065812] ? prepare_exit_to_usermode+0x291/0x3b0 [ 36.070813] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.075640] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.080820] RIP: 0033:0x440009 [ 36.083997] 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 [ 36.102891] RSP: 002b:00007ffd54d5ab18 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 36.110578] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440009 [ 36.117840] RDX: 0000000000440009 RSI: 0000000000006611 RDI: 0000000000000003 [ 36.125100] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 36.132396] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401890 [ 36.139668] R13: 0000000000401920 R14: 0000000000000000 R15: 0000000000000000 [ 36.146942] Modules linked in: [ 36.150324] ---[ end trace 0931a6ed15a69634 ]--- [ 36.155132] RIP: 0010:rb_erase+0x306/0x3710 [ 36.159447] 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 [ 36.178391] RSP: 0018:ffff8801d83ee918 EFLAGS: 00010202 [ 36.183880] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 36.191154] RDX: 1ffff1003b07dd2b RSI: ffffffff8b5a08a0 RDI: 0000000000000008 [ 36.198443] RBP: ffff8801d83ef320 R08: dffffc0000000000 R09: fffffbfff135d5c8 [ 36.205727] R10: fffffbfff135d5c8 R11: ffffffff89aeae43 R12: ffff8801b6b4d1f0 [ 36.213015] R13: dffffc0000000000 R14: ffff8801d83ef2f8 R15: ffff8801d83ef438 [ 36.220325] FS: 0000000001066880(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 [ 36.228579] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.234473] CR2: 0000000020000080 CR3: 00000001d70ec000 CR4: 00000000001406f0 [ 36.241728] Kernel panic - not syncing: Fatal exception [ 36.247995] Kernel Offset: disabled [ 36.251614] Rebooting in 86400 seconds..