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WARNING: CPU: 3 PID: 9 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: 9 Comm: kworker/u16:0 Not tainted 5.11.0-rc6-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Workqueue: bat_events batadv_nc_worker
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: ffff888010818000 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: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000009ede08c CR3: 000000006cebc000 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_is_held_type+0xe8/0x120 kernel/locking/lockdep.c:5486
Code: 03 44 39 f0 41 0f 94 c5 48 c7 c7 a0 aa 4b 89 e8 0e 0d 00 00 b8 ff ff ff ff 65 0f c1 05 21 20 08 77 83 f8 01 75 1b ff 34 24 9d <48> 83 c4 08 44 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 ed eb
RSP: 0018:ffffc900003afb50 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 0000000000000002 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffffff8b373ce0 R08: 0000000000000000 R09: ffffffff8d038a8f
R10: fffffbfff1a07151 R11: 0000000000000000 R12: ffff888010818000
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff8880108189b0
 lock_is_held include/linux/lockdep.h:271 [inline]
 rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:123
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x5d2/0x720 kernel/locking/lockdep.c:5413
 rcu_lock_acquire include/linux/rcupdate.h:259 [inline]
 rcu_read_lock include/linux/rcupdate.h:648 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:404 [inline]
 batadv_nc_worker+0x12d/0xe50 net/batman-adv/network-coding.c:715
 process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296