------------[ cut here ]------------
WARNING: CPU: 3 PID: 11475 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: 11475 Comm: syz-executor.1 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 ae 43 ca fb 4c 89 e6 48 c7 c7 e0 6b b9 8b e8 7f eb 53 03 bf 58 89 41 00 e8 95 bb 33 fe e9 d5 f9 ff ff e8 8b 43 ca fb <0f> 0b 48 c7 c7 e0 6b b9 8b 4c 89 e6 45 31 e4 e8 57 eb 53 03 ba 24
RSP: 0018:ffffc90000598d68 EFLAGS: 00010046
RAX: 0000000080010003 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff888015a2b780 RSI: ffffffff85a87a65 RDI: 0000000000000003
RBP: ffffc90000598e00 R08: 0000000000000001 R09: 0000000000000022
R10: ffffffff85a87462 R11: 0000000000000000 R12: 0000000000000046
R13: 0000000000000022 R14: ffffc90000598f18 R15: ffff888010d9e000
FS:  0000000000000000(0000) GS:ffff88802cd00000(0063) knlGS:000000000a4e5380
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000002c322000 CR3: 0000000023b1d000 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:lock_acquire+0x1d2/0x720 kernel/locking/lockdep.c:5410
Code: 48 c7 c7 a0 aa 4b 89 48 83 c4 20 e8 98 4a a1 07 b8 ff ff ff ff 65 0f c1 05 ab 3c a9 7e 83 f8 01 0f 85 da 03 00 00 ff 34 24 9d <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7
RSP: 0018:ffffc900017c7aa0 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 1ffff920002f8f56 RCX: 0000000000000001
RDX: 1ffff11002b45820 RSI: 0000000000000002 RDI: 0000000000000000
RBP: 0000000000000001 R08: 000000000010a5e8 R09: 0000000000000001
R10: fffffbfff1f3dec0 R11: 1ffffffff1e90114 R12: 0000000000000000
R13: ffff888018c90520 R14: 0000000000000000 R15: 0000000000000000
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:354 [inline]
 __mutex_lock_common kernel/locking/mutex.c:968 [inline]
 __mutex_lock+0x1fb/0x1110 kernel/locking/mutex.c:1103
 rtc_dev_ioctl+0xe6/0x8e0 drivers/rtc/dev.c:213
 rtc_dev_release+0x3e/0x80 drivers/rtc/dev.c:451
 __fput+0x283/0x920 fs/file_table.c:280
 task_work_run+0xdd/0x190 kernel/task_work.c:140
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:174 [inline]
 exit_to_user_mode_prepare+0x249/0x250 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: 0023:0xf7f37549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000ffbc1930 EFLAGS: 00000282 ORIG_RAX: 0000000000000006
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000008165000 RDI: 0000000000000000
RBP: 0000000008165000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000