------------[ cut here ]------------ WARNING: CPU: 0 PID: 10563 at kernel/rcu/tree.c:760 rcu_irq_exit+0x15/0x20 kernel/rcu/tree.c:760 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 10563 Comm: syz-executor.2 Not tainted 5.8.0-rc7-next-20200731-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:231 __warn.cold+0x20/0x4a kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:rcu_irq_exit+0x15/0x20 kernel/rcu/tree.c:760 Code: 11 fd ff ff 5b 5d c3 0f 0b e9 7c ff ff ff 0f 0b eb 91 0f 1f 00 8b 05 a6 68 c8 02 85 c0 74 0d 65 8b 05 9b a9 10 78 85 c0 74 02 <0f> 0b e9 34 ff ff ff 0f 1f 40 00 41 54 55 48 c7 c5 c0 6b 03 00 53 RSP: 0000:ffffc90005867700 EFLAGS: 00010002 RAX: 0000000000000001 RBX: 0000000000000082 RCX: ffffc9000ce21000 RDX: 0000000000040000 RSI: ffffffff81620441 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000000 R09: ffff8880ae636ca3 R10: 0000000000000000 R11: 000000002d2d2d2d R12: 0000000000000000 R13: 000000000000003c R14: dffffc0000000000 R15: 0000000000000000 rcu_irq_exit_irqson+0x76/0x140 kernel/rcu/tree.c:815 trace_console_rcuidle include/trace/events/printk.h:10 [inline] call_console_drivers kernel/printk/printk.c:1839 [inline] console_unlock+0x839/0xe90 kernel/printk/printk.c:2542 vprintk_emit+0x2c0/0x740 kernel/printk/printk.c:2069 vprintk_func+0x8f/0x1a6 kernel/printk/printk_safe.c:393 printk+0xba/0xed kernel/printk/printk.c:2117 report_bug.cold+0x72/0xb3 lib/bug.c:194 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:rcu_irq_enter+0x15/0x20 kernel/rcu/tree.c:1045 Code: 00 00 00 4c 89 e7 e8 3a d0 c2 f9 eb b4 0f 0b eb 8b 0f 1f 40 00 8b 05 e6 67 c8 02 85 c0 74 0d 65 8b 05 db a8 10 78 85 c0 74 02 <0f> 0b e9 44 ff ff ff cc cc cc cc 41 55 49 89 fd 41 54 55 48 89 f5 RSP: 0000:ffffc90005867ac0 EFLAGS: 00010002 RAX: 0000000000000001 RBX: 0000000000000082 RCX: ffffc9000ce21000 RDX: 0000000000040000 RSI: ffffffff816206c1 RDI: 0000000000000005 RBP: ffffffff8cc2c9b0 R08: 0000000000000000 R09: ffffffff8ab9994f R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000082 R13: ffffffff87f3eaa6 R14: 0000000000000000 R15: ffffffff89c52900 rcu_irq_enter_irqson+0x76/0x140 kernel/rcu/tree.c:1060 trace_irq_disable_rcuidle include/trace/events/preemptirq.h:36 [inline] trace_irq_disable_rcuidle include/trace/events/preemptirq.h:36 [inline] trace_hardirqs_off kernel/trace/trace_preemptirq.c:82 [inline] trace_hardirqs_off+0x114/0x210 kernel/trace/trace_preemptirq.c:74 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] _raw_spin_lock_irqsave+0x66/0xc0 kernel/locking/spinlock.c:159 debug_object_activate+0x12e/0x3e0 lib/debugobjects.c:636 debug_rcu_head_queue kernel/rcu/rcu.h:176 [inline] __call_rcu kernel/rcu/tree.c:2869 [inline] call_rcu+0x2c/0x7e0 kernel/rcu/tree.c:2957 lockdep_unregister_key+0x21d/0x570 kernel/locking/lockdep.c:5684 blk_free_flush_queue+0x1c/0x60 block/blk-flush.c:481 blk_mq_hw_sysfs_release+0x98/0x160 block/blk-mq-sysfs.c:43 kobject_cleanup lib/kobject.c:704 [inline] kobject_release lib/kobject.c:735 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x171/0x270 lib/kobject.c:752 blk_mq_release+0x250/0x3f0 block/blk-mq.c:2979 blk_release_queue+0x20c/0x3d0 block/blk-sysfs.c:945 kobject_cleanup lib/kobject.c:704 [inline] kobject_release lib/kobject.c:735 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x171/0x270 lib/kobject.c:752 disk_release+0x26f/0x320 block/genhd.c:1571 device_release+0x71/0x200 drivers/base/core.c:1800 kobject_cleanup lib/kobject.c:704 [inline] kobject_release lib/kobject.c:735 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x171/0x270 lib/kobject.c:752 put_disk+0x1f/0x30 block/genhd.c:1816 loop_remove drivers/block/loop.c:2190 [inline] loop_control_ioctl drivers/block/loop.c:2286 [inline] loop_control_ioctl+0x412/0x480 drivers/block/loop.c:2252 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45ccd9 Code: 2d b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f3d856c5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000011640 RCX: 000000000045ccd9 RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000004 RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c R13: 00007fff39a957ff R14: 00007f3d856c69c0 R15: 000000000078bf0c Shutting down cpus with NMI Kernel Offset: disabled