[ 27.703366] audit: type=1800 audit(1539344469.429:30): pid=5226 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 '10.128.0.109' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.288159] kasan: CONFIG_KASAN_INLINE enabled [ 37.292857] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 37.300263] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 37.306500] CPU: 0 PID: 5381 Comm: syz-executor622 Not tainted 4.19.0-rc7+ #280 [ 37.313940] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.323282] RIP: 0010:rb_erase+0x306/0x3710 [ 37.327585] 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 [ 37.346487] RSP: 0018:ffff8801bd6fe918 EFLAGS: 00010202 [ 37.351838] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 37.359092] RDX: 1ffff10037adfd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 37.366344] RBP: ffff8801bd6ff320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 37.373598] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b6fc51f0 [ 37.380852] R13: dffffc0000000000 R14: ffff8801bd6ff2f8 R15: ffff8801bd6ff438 [ 37.388110] FS: 0000000001e40880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 37.396317] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.402205] CR2: 0000000020000000 CR3: 00000001d7e6c000 CR4: 00000000001406f0 [ 37.409458] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.416707] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.423956] Call Trace: [ 37.426529] ? lockdep_on+0x50/0x50 [ 37.430155] ? rb_insert_color+0x1460/0x1460 [ 37.434549] ? noop_count+0x40/0x40 [ 37.438153] ? lock_pin_lock+0x350/0x350 [ 37.442196] ? noop_count+0x40/0x40 [ 37.445803] ? kasan_check_read+0x11/0x20 [ 37.449941] ? noop_count+0x40/0x40 [ 37.453565] ? noop_count+0x40/0x40 [ 37.457176] ? lock_pin_lock+0x350/0x350 [ 37.461218] ? mark_held_locks+0x130/0x130 [ 37.465432] ? check_usage_forwards+0x3e0/0x3e0 [ 37.470093] ? __bfs+0x385/0x7a0 [ 37.473440] ? noop_count+0x40/0x40 [ 37.477046] ? check_usage+0x1a9/0x790 [ 37.480921] ? lock_pin_lock+0x350/0x350 [ 37.485008] ? check_usage_forwards+0x3e0/0x3e0 [ 37.489658] ? __bfs+0x385/0x7a0 [ 37.493022] ? __lock_acquire+0x7ec/0x4ec0 [ 37.497236] ? lockdep_on+0x50/0x50 [ 37.500846] ? lock_pin_lock+0x350/0x350 [ 37.504906] ? mark_held_locks+0x130/0x130 [ 37.509124] ? kasan_check_read+0x11/0x20 [ 37.513261] ? __lock_acquire+0x2881/0x4ec0 [ 37.517569] ? mark_held_locks+0x130/0x130 [ 37.521806] ? print_usage_bug+0xc0/0xc0 [ 37.525849] ? _raw_spin_unlock+0x2c/0x50 [ 37.529991] ? graph_lock+0x170/0x170 [ 37.533790] ? ext4_exit_mballoc+0xc0/0xc0 [ 37.538006] ? __lock_acquire+0x7ec/0x4ec0 [ 37.542225] ? find_held_lock+0x36/0x1c0 [ 37.546269] ? mark_held_locks+0x130/0x130 [ 37.550487] ? lock_downgrade+0x900/0x900 [ 37.554617] ? ext4_es_scan+0x960/0x960 [ 37.558569] ? lock_release+0x970/0x970 [ 37.562528] ? do_raw_write_trylock+0x1c0/0x1c0 [ 37.567179] ? kasan_check_write+0x14/0x20 [ 37.571398] ? lock_acquire+0x1ed/0x520 [ 37.575354] ? integrity_inode_free+0x77/0x320 [ 37.579919] ? ext4_es_remove_extent+0x151/0x500 [ 37.584669] ? lock_release+0x970/0x970 [ 37.588628] ? kasan_check_write+0x14/0x20 [ 37.592844] ? do_raw_write_lock+0xbd/0x1b0 [ 37.597165] integrity_inode_free+0x12f/0x320 [ 37.601649] security_inode_free+0x19/0x90 [ 37.605866] __destroy_inode+0x328/0x820 [ 37.609909] ? generic_update_time+0x450/0x450 [ 37.614479] ? evict+0x5d8/0x980 [ 37.617826] ? lock_downgrade+0x900/0x900 [ 37.621957] ? __inode_wait_for_writeback+0x2cf/0x380 [ 37.627128] destroy_inode+0xda/0x200 [ 37.630913] ? __destroy_inode+0x820/0x820 [ 37.635130] ? kasan_check_write+0x14/0x20 [ 37.639347] ? do_raw_spin_lock+0xc1/0x200 [ 37.643583] evict+0x5e0/0x980 [ 37.646760] ? destroy_inode+0x200/0x200 [ 37.650806] ? iput+0x671/0xa90 [ 37.654074] ? lock_downgrade+0x900/0x900 [ 37.658210] ? kasan_check_read+0x11/0x20 [ 37.662342] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 37.666903] ? lock_downgrade+0x900/0x900 [ 37.671035] iput+0x679/0xa90 [ 37.674125] ? inode_add_lru+0x2a0/0x2a0 [ 37.678167] ? up_write+0x7b/0x220 [ 37.681690] ? up_read+0x110/0x110 [ 37.685211] ? up_read+0x110/0x110 [ 37.688731] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.694253] ? check_preemption_disabled+0x48/0x200 [ 37.699254] ext4_ioctl+0x236f/0x4210 [ 37.703040] ? is_bpf_text_address+0xac/0x170 [ 37.707553] ? ext4_ioctl_group_add+0x560/0x560 [ 37.712207] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 37.717988] ? kasan_check_read+0x11/0x20 [ 37.722121] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 37.727380] ? rcu_bh_qs+0xc0/0xc0 [ 37.730901] ? rcu_bh_qs+0xc0/0xc0 [ 37.734423] ? unwind_dump+0x190/0x190 [ 37.738295] ? is_bpf_text_address+0xd3/0x170 [ 37.742773] ? kernel_text_address+0x79/0xf0 [ 37.747163] ? __kernel_text_address+0xd/0x40 [ 37.751643] ? unwind_get_return_address+0x61/0xa0 [ 37.756555] ? __save_stack_trace+0x8d/0xf0 [ 37.760863] ? save_stack+0xa9/0xd0 [ 37.764484] ? save_stack+0x43/0xd0 [ 37.768093] ? __kasan_slab_free+0x102/0x150 [ 37.772483] ? kasan_slab_free+0xe/0x10 [ 37.776440] ? kmem_cache_free+0x83/0x290 [ 37.780572] ? putname+0xf2/0x130 [ 37.784007] ? do_sys_open+0x54d/0x700 [ 37.787875] ? __x64_sys_openat+0x9d/0x100 [ 37.792098] ? do_syscall_64+0x1b9/0x820 [ 37.796139] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.801491] ? trace_hardirqs_off+0xb8/0x310 [ 37.805881] ? kasan_check_read+0x11/0x20 [ 37.810019] ? do_raw_spin_unlock+0xa7/0x2f0 [ 37.814412] ? trace_hardirqs_on+0x310/0x310 [ 37.818798] ? kasan_check_write+0x14/0x20 [ 37.823016] ? trace_hardirqs_off+0xb8/0x310 [ 37.827407] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.832945] ? check_preemption_disabled+0x48/0x200 [ 37.837944] ? check_preemption_disabled+0x48/0x200 [ 37.842944] ? ext4_ioctl_group_add+0x560/0x560 [ 37.847597] do_vfs_ioctl+0x1de/0x1720 [ 37.851471] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 37.856732] ? ioctl_preallocate+0x300/0x300 [ 37.861126] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.866645] ? __fget_light+0x2e9/0x430 [ 37.870603] ? fget_raw+0x20/0x20 [ 37.874035] ? putname+0xf2/0x130 [ 37.877471] ? rcu_read_lock_sched_held+0x108/0x120 [ 37.882469] ? kmem_cache_free+0x24f/0x290 [ 37.886686] ? putname+0xf7/0x130 [ 37.890136] ? do_syscall_64+0x9a/0x820 [ 37.894093] ? do_syscall_64+0x9a/0x820 [ 37.898072] ? lockdep_hardirqs_on+0x421/0x5c0 [ 37.902649] ? security_file_ioctl+0x94/0xc0 [ 37.907040] ksys_ioctl+0xa9/0xd0 [ 37.910483] __x64_sys_ioctl+0x73/0xb0 [ 37.914354] do_syscall_64+0x1b9/0x820 [ 37.918222] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.923569] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.928478] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.933308] ? trace_hardirqs_on_caller+0x310/0x310 [ 37.938308] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.943307] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.948306] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.953138] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.958309] RIP: 0033:0x440029 [ 37.961482] 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 [ 37.980366] RSP: 002b:00007fffc25a45b8 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 37.988055] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440029 [ 37.995316] RDX: 0000000000440029 RSI: 0000000000006611 RDI: 0000000000000003 [ 38.002567] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 38.009820] R10: 0000000000000000 R11: 0000000000000213 R12: 00000000004018b0 [ 38.017093] R13: 0000000000401940 R14: 0000000000000000 R15: 0000000000000000 [ 38.024348] Modules linked in: [ 38.027855] ---[ end trace 57485ee2ac80e1d7 ]--- [ 38.032687] RIP: 0010:rb_erase+0x306/0x3710 [ 38.036997] 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 [ 38.055947] RSP: 0018:ffff8801bd6fe918 EFLAGS: 00010202 [ 38.061394] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 [ 38.068651] RDX: 1ffff10037adfd2b RSI: ffffffff8afbc860 RDI: 0000000000000008 [ 38.075941] RBP: ffff8801bd6ff320 R08: dffffc0000000000 R09: fffffbfff12d69a0 [ 38.083258] R10: fffffbfff12d69a0 R11: ffffffff896b4d03 R12: ffff8801b6fc51f0 [ 38.090544] R13: dffffc0000000000 R14: ffff8801bd6ff2f8 R15: ffff8801bd6ff438 [ 38.097814] FS: 0000000001e40880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 38.106053] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.111986] CR2: 0000000020000000 CR3: 00000001d7e6c000 CR4: 00000000001406f0 [ 38.119243] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.126531] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.133815] Kernel panic - not syncing: Fatal exception [ 38.139987] Kernel Offset: disabled [ 38.143607] Rebooting in 86400 seconds..