syzbot

------------[ cut here ]------------
raw_local_irq_restore() called with IRQs enabled
WARNING: CPU: 1 PID: 11162 at kernel/locking/irqflag-debug.c:10 warn_bogus_irq_restore+0x1d/0x20 kernel/locking/irqflag-debug.c:10
Modules linked in:
CPU: 1 PID: 11162 Comm: syz-executor.1 Not tainted 5.12.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:warn_bogus_irq_restore+0x1d/0x20 kernel/locking/irqflag-debug.c:10
Code: be ff cc cc cc cc cc cc cc cc cc cc cc 80 3d a1 dc ab 04 00 74 01 c3 48 c7 c7 20 92 6b 89 c6 05 90 dc ab 04 01 e8 b9 cc be ff <0f> 0b c3 48 39 77 10 0f 84 97 00 00 00 66 f7 47 22 f0 ff 74 4b 48
------------[ cut here ]------------
WARNING: CPU: 1 PID: 11162 at drivers/gpu/drm/vkms/vkms_crtc.c:21 vkms_vblank_simulate+0x31e/0x3b0 drivers/gpu/drm/vkms/vkms_crtc.c:21
Modules linked in:
CPU: 1 PID: 11162 Comm: syz-executor.1 Not tainted 5.12.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:vkms_vblank_simulate+0x31e/0x3b0 drivers/gpu/drm/vkms/vkms_crtc.c:21
Code: 85 9e 00 00 00 48 8b 95 b8 01 00 00 4c 89 e1 bf 02 00 00 00 48 c7 c6 e0 c2 d8 89 e8 8c 09 f0 ff e9 e5 fe ff ff e8 d2 51 27 fd <0f> 0b e9 88 fd ff ff e8 96 e4 6a fd e9 11 fe ff ff 4c 89 ef e8 89
RSP: 0018:ffffc90000dc04e8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff88814387de58 RCX: 0000000000000100
RDX: ffff8880621754c0 RSI: ffffffff844c889e RDI: 0000000000000003
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffff844c8623 R11: 0000000000000000 R12: ffff88814387cd30
R13: 0000000000fe4c00 R14: ffff8880b9d26340 R15: ffffffff844c8580
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000542978 CR3: 000000002353f000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1537 [inline]
 __hrtimer_run_queues+0x609/0xe40 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:197
Code: f0 4d 89 03 e9 f2 fc ff ff b9 ff ff ff ff ba 08 00 00 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 40 00 <65> 8b 05 49 15 8e 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b
RSP: 0018:ffffc90000dc07b0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000100
RDX: ffff8880621754c0 RSI: ffffffff815bf70f RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8fab38a7
R10: ffffffff815bf705 R11: 0000000000000000 R12: ffffffff84b24d20
R13: 0000000000000200 R14: dffffc0000000000 R15: ffffc90000dc0810
 console_unlock+0x805/0xc80 kernel/printk/printk.c:2586
 vprintk_emit+0x1ca/0x560 kernel/printk/printk.c:2098
 vprintk_func+0x8d/0x1e0 kernel/printk/printk_safe.c:401
 printk+0xba/0xed kernel/printk/printk.c:2146
 show_opcodes.cold+0x1c/0x21 arch/x86/kernel/dumpstack.c:129
 show_iret_regs+0xd/0x33 arch/x86/kernel/dumpstack.c:155
 __show_regs+0x1e/0x60 arch/x86/kernel/process_64.c:73
 show_regs+0x2f/0x40 arch/x86/kernel/dumpstack.c:469
 __warn+0xe2/0x210 kernel/panic.c:595
 report_bug+0x1bd/0x210 lib/bug.c:195
 handle_bug+0x3c/0x60 arch/x86/kernel/traps.c:239
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:259
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:575
RIP: 0010:warn_bogus_irq_restore+0x1d/0x20 kernel/locking/irqflag-debug.c:10
Code: be ff cc cc cc cc cc cc cc cc cc cc cc 80 3d a1 dc ab 04 00 74 01 c3 48 c7 c7 20 92 6b 89 c6 05 90 dc ab 04 01 e8 b9 cc be ff <0f> 0b c3 48 39 77 10 0f 84 97 00 00 00 66 f7 47 22 f0 ff 74 4b 48
RSP: 0018:ffffc90000dc0cb8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff888013798088 RCX: 0000000000000000
RDX: ffff8880621754c0 RSI: ffffffff815c3875 RDI: fffff520001b8189
RBP: 0000000000000200 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815bc60e R11: 0000000000000000 R12: 0000000000000003
R13: ffffed10026f3011 R14: 0000000000000001 R15: ffff8880b9d35f40
 kvm_wait arch/x86/kernel/kvm.c:860 [inline]
 kvm_wait+0xc9/0xe0 arch/x86/kernel/kvm.c:837
 pv_wait arch/x86/include/asm/paravirt.h:564 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x8b8/0xb40 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock+0x200/0x2b0 kernel/locking/spinlock_debug.c:113
 spin_lock include/linux/spinlock.h:354 [inline]
 tcp_tsq_handler+0x1d/0x200 net/ipv4/tcp_output.c:1029
 tcp_tasklet_func+0x2cc/0x560 net/ipv4/tcp_output.c:1063
 tasklet_action_common.constprop.0+0x1d7/0x2d0 kernel/softirq.c:557
 __do_softirq+0x29b/0x9f6 kernel/softirq.c:345
 invoke_softirq kernel/softirq.c:221 [inline]
 __irq_exit_rcu kernel/softirq.c:422 [inline]
 irq_exit_rcu+0x134/0x200 kernel/softirq.c:434
 common_interrupt+0xa4/0xd0 arch/x86/kernel/irq.c:240
 </IRQ>
 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:623
RIP: 0010:compound_head include/linux/page-flags.h:184 [inline]
RIP: 0010:PageAnon include/linux/page-flags.h:483 [inline]
RIP: 0010:page_remove_rmap+0x3a/0x1430 mm/rmap.c:1350
Code: 4c 8d 65 08 48 83 ec 18 e8 73 0d c8 ff 48 89 ef e8 6b 66 11 00 4c 89 e2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 94 11 00 00 4c 8b 7d 08 31 ff 48 89 eb 4d 89 fe 41 83 e6 01
RSP: 0018:ffffc90009547748 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81bd3498
RDX: 1ffffd4000266f31 RSI: 0000000000000008 RDI: ffffea0001337980
RBP: ffffea0001337980 R08: 0000000000000000 R09: ffffea0001337987
R10: fffff94000266f30 R11: 0000000000000000 R12: ffffea0001337988
R13: 0000000000000000 R14: dffffc0000000000 R15: 00007fb78ffa9000
 zap_pte_range mm/memory.c:1270 [inline]
 zap_pmd_range mm/memory.c:1374 [inline]
 zap_pud_range mm/memory.c:1403 [inline]
 zap_p4d_range mm/memory.c:1424 [inline]
 unmap_page_range+0xe30/0x2650 mm/memory.c:1445
 unmap_single_vma+0x198/0x300 mm/memory.c:1490
 unmap_vmas+0x16d/0x2f0 mm/memory.c:1522
 exit_mmap+0x2a8/0x590 mm/mmap.c:3218
 __mmput+0x122/0x470 kernel/fork.c:1090
 mmput+0x58/0x60 kernel/fork.c:1111
 exit_mm kernel/exit.c:501 [inline]
 do_exit+0xb0a/0x2a60 kernel/exit.c:812
 do_group_exit+0x125/0x310 kernel/exit.c:922
 get_signal+0x42c/0x2100 kernel/signal.c:2773
 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811
 handle_signal_work kernel/entry/common.c:147 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x466459
Code: Unable to access opcode bytes at RIP 0x46642f.
RSP: 002b:00007fb78d938218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000056bf68 RCX: 0000000000466459
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf68
RBP: 000000000056bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf6c
R13: 0000000000a9fb1f R14: 00007fb78d938300 R15: 0000000000022000