[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.19' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 57.952011][ T6836] blk_update_request: I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x1000 phys_seg 1 prio class 0 [ 57.965845][ T6836] XFS (loop0): SB validate failed with error -5. [ 57.974748][ T6836] ------------[ cut here ]------------ [ 57.980508][ T6836] WARNING: CPU: 0 PID: 6836 at kernel/rcu/tree.c:1045 rcu_irq_enter+0x15/0x20 [ 57.990399][ T6836] Kernel panic - not syncing: panic_on_warn set ... [ 57.997164][ T6836] CPU: 0 PID: 6836 Comm: syz-executor106 Not tainted 5.8.0-rc6-next-20200720-syzkaller #0 [ 58.007497][ T6836] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.017710][ T6836] Call Trace: [ 58.021423][ T6836] dump_stack+0x18f/0x20d [ 58.025759][ T6836] panic+0x2e3/0x75c [ 58.030157][ T6836] ? __warn_printk+0xf3/0xf3 [ 58.034909][ T6836] ? printk+0xba/0xed [ 58.039100][ T6836] ? log_store.cold+0x16/0x16 [ 58.043958][ T6836] ? __warn.cold+0x5/0x45 [ 58.048951][ T6836] ? __warn+0xd6/0x1f2 [ 58.053511][ T6836] ? rcu_irq_enter+0x15/0x20 [ 58.058705][ T6836] __warn.cold+0x20/0x45 [ 58.062953][ T6836] ? rcu_irq_enter+0x15/0x20 [ 58.067824][ T6836] report_bug+0x1bd/0x210 [ 58.072365][ T6836] handle_bug+0x38/0x90 [ 58.076618][ T6836] ? mark_lock+0xbc/0x1710 [ 58.081389][ T6836] exc_invalid_op+0x14/0x40 [ 58.086169][ T6836] asm_exc_invalid_op+0x12/0x20 [ 58.091157][ T6836] RIP: 0010:rcu_irq_enter+0x15/0x20 [ 58.096645][ T6836] Code: 00 00 00 4c 89 e7 e8 6a 39 c8 f9 eb b4 0f 0b eb 8b 0f 1f 40 00 8b 05 86 7d cd 02 85 c0 74 0d 65 8b 05 bb 66 16 78 85 c0 74 02 <0f> 0b e9 44 ff ff ff cc cc cc cc 0f 1f 44 00 00 48 8b 05 c4 8f da [ 58.117475][ T6836] RSP: 0018:ffffc90001617ae8 EFLAGS: 00010002 [ 58.124069][ T6836] RAX: 0000000000000001 RBX: 0000000000000086 RCX: ffffffff817a03c7 [ 58.135621][ T6836] RDX: ffff8880958c61c0 RSI: ffffffff81620cd1 RDI: 0000000000000005 [ 58.144005][ T6836] RBP: ffffffff8cc535a8 R08: 0000000000000000 R09: ffffffff8ab8f10f [ 58.152127][ T6836] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000086 [ 58.160815][ T6836] R13: ffffffff87ee2656 R14: 0000000000000000 R15: ffffffff89c52a40 [ 58.169173][ T6836] ? _raw_spin_lock_irqsave+0x66/0xc0 [ 58.174699][ T6836] ? trace_hardirqs_off+0x27/0x210 [ 58.179983][ T6836] ? rcu_irq_enter_irqson+0x71/0x140 [ 58.185361][ T6836] rcu_irq_enter_irqson+0x76/0x140 [ 58.190587][ T6836] trace_hardirqs_off+0x114/0x210 [ 58.195880][ T6836] _raw_spin_lock_irqsave+0x66/0xc0 [ 58.201260][ T6836] debug_object_activate+0x12e/0x3e0 [ 58.206736][ T6836] ? debug_object_assert_init+0x2e0/0x2e0 [ 58.212625][ T6836] ? zap_class+0x42e/0x960 [ 58.217327][ T6836] ? lockdep_lock+0x280/0x280 [ 58.222105][ T6836] call_rcu+0x2c/0x7e0 [ 58.226914][ T6836] ? __lockdep_free_key_range+0x56/0x110 [ 58.232760][ T6836] lockdep_unregister_key+0x21d/0x570 [ 58.238515][ T6836] destroy_workqueue+0x449/0x740 [ 58.243886][ T6836] xfs_destroy_mount_workqueues+0x37/0x150 [ 58.249957][ T6836] xfs_fc_fill_super+0x4c0/0x12e0 [ 58.255072][ T6836] get_tree_bdev+0x421/0x740 [ 58.259837][ T6836] ? xfs_setup_devices+0x290/0x290 [ 58.265168][ T6836] vfs_get_tree+0x89/0x2f0 [ 58.269700][ T6836] do_mount+0x14f6/0x1e20 [ 58.274440][ T6836] ? copy_mount_string+0x40/0x40 [ 58.279472][ T6836] ? __might_fault+0x190/0x1d0 [ 58.284663][ T6836] ? _copy_from_user+0x138/0x190 [ 58.290373][ T6836] ? memdup_user+0x7c/0xd0 [ 58.294973][ T6836] __x64_sys_mount+0x18f/0x230 [ 58.299940][ T6836] do_syscall_64+0x60/0xe0 [ 58.304798][ T6836] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 58.311252][ T6836] RIP: 0033:0x440359 [ 58.315265][ T6836] Code: Bad RIP value. [ 58.319320][ T6836] RSP: 002b:00007ffcb4d1e758 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 58.327847][ T6836] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440359 [ 58.336147][ T6836] RDX: 0000000020000400 RSI: 00000000200001c0 RDI: 0000000020000240 [ 58.344884][ T6836] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 58.353297][ T6836] R10: 0000000001400084 R11: 0000000000000246 R12: 0000000000401b60 [ 58.362705][ T6836] R13: 0000000000401bf0 R14: 0000000000000000 R15: 0000000000000000 [ 58.373389][ T6836] Kernel Offset: disabled [ 58.377964][ T6836] Rebooting in 86400 seconds..