hpet: Lost 1 RTC interrupts
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WARNING: CPU: 3 PID: 11479 at drivers/rtc/rtc-mc146818-lib.c:25 mc146818_get_time+0x665/0x860 drivers/rtc/rtc-mc146818-lib.c:25
Modules linked in:
CPU: 3 PID: 11479 Comm: syz-executor.2 Not tainted 5.11.0-rc6-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:mc146818_get_time+0x665/0x860 drivers/rtc/rtc-mc146818-lib.c:25
Code: eb 4e e8 ee 54 ca fb 4c 89 e6 48 c7 c7 e0 6b 19 8b e8 3f de 53 03 bf 58 89 41 00 e8 95 bb 33 fe e9 d5 f9 ff ff e8 cb 54 ca fb <0f> 0b 48 c7 c7 e0 6b 19 8b 4c 89 e6 45 31 e4 e8 17 de 53 03 ba 24
RSP: 0018:ffffc90000598d68 EFLAGS: 00010046
RAX: 0000000080010002 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff888012569bc0 RSI: ffffffff85a866a5 RDI: 0000000000000003
RBP: ffffc90000598e00 R08: 0000000000000001 R09: 0000000000000022
R10: ffffffff85a860a2 R11: 0000000000000000 R12: 0000000000000046
R13: 0000000000000022 R14: ffffc90000598f18 R15: ffff88801019e000
FS:  0000000000000000(0000) GS:ffff88802cd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000002c126000 CR3: 000000000b08e000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 hpet_rtc_interrupt+0x2b0/0x380 arch/x86/kernel/hpet.c:1358
 __handle_irq_event_percpu+0x303/0x8f0 kernel/irq/handle.c:156
 handle_irq_event_percpu kernel/irq/handle.c:196 [inline]
 handle_irq_event+0x102/0x290 kernel/irq/handle.c:213
 handle_edge_irq+0x25f/0xd00 kernel/irq/chip.c:819
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_irq_on_irqstack arch/x86/include/asm/irq_stack.h:48 [inline]
 run_irq_on_irqstack_cond arch/x86/include/asm/irq_stack.h:101 [inline]
 handle_irq arch/x86/kernel/irq.c:230 [inline]
 __common_interrupt arch/x86/kernel/irq.c:249 [inline]
 common_interrupt+0x120/0x200 arch/x86/kernel/irq.c:239
 asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:620
RIP: 0010:PageSwapBacked include/linux/page-flags.h:357 [inline]
RIP: 0010:mm_counter_file include/linux/mm.h:1915 [inline]
RIP: 0010:mm_counter include/linux/mm.h:1924 [inline]
RIP: 0010:zap_pte_range mm/memory.c:1263 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1368 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1397 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1418 [inline]
RIP: 0010:unmap_page_range+0xda2/0x2640 mm/memory.c:1439
Code: ff 48 8b 45 08 31 ff 48 89 eb 49 89 c4 48 89 84 24 80 00 00 00 41 83 e4 01 4c 89 e6 e8 a7 c0 cd ff 4d 85 e4 0f 85 1e 11 00 00 <e8> a9 b8 cd ff be 08 00 00 00 48 89 df e8 5c 81 10 00 48 89 d8 48
RSP: 0018:ffffc90009ac7768 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffea000174a740 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff888012569bc0 RDI: 0000000000000003
RBP: ffffea000174a740 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff81a502b9 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888065375520 R14: dffffc0000000000 R15: 00000000f74a5000
 unmap_single_vma+0x198/0x300 mm/memory.c:1484
 unmap_vmas+0x168/0x2e0 mm/memory.c:1516
 exit_mmap+0x2b1/0x5a0 mm/mmap.c:3220
 __mmput+0x122/0x470 kernel/fork.c:1082
 mmput+0x53/0x60 kernel/fork.c:1103
 exit_mm kernel/exit.c:501 [inline]
 do_exit+0xb6a/0x2ae0 kernel/exit.c:812
 do_group_exit+0x125/0x310 kernel/exit.c:922
 get_signal+0x427/0x20f0 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:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302
 __do_fast_syscall_32+0x62/0x80 arch/x86/entry/common.c:142
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:164
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f5f549
Code: Unable to access opcode bytes at RIP 0xf7f5f51f.
RSP: 002b:00000000f555967c EFLAGS: 00000296 ORIG_RAX: 00000000000000f0
RAX: fffffffffffffe00 RBX: 000000000818afc8 RCX: 0000000000000080
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000818afcc
RBP: 0000000000000081 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000