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UBSAN: shift-out-of-bounds in kernel/sched/fair.c:7712:14
shift exponent 388 is too large for 64-bit type 'long unsigned int'
CPU: 2 PID: 1645 Comm: kcompactd1 Not tainted 5.12.0-rc8-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x141/0x1d7 lib/dump_stack.c:120
 ubsan_epilogue+0xb/0x5a lib/ubsan.c:148
 __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 lib/ubsan.c:327
 detach_tasks kernel/sched/fair.c:7712 [inline]
 load_balance.cold+0x1d/0x2e kernel/sched/fair.c:9641
 rebalance_domains+0x5cc/0xdb0 kernel/sched/fair.c:10029
 __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
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632
RIP: 0010:clear_page_erms+0x7/0x10 arch/x86/lib/clear_page_64.S:49
Code: 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89 47 38 48 8d 7f 40 75 d9 90 c3 0f 1f 80 00 00 00 00 b9 00 10 00 00 31 c0 <f3> aa c3 cc cc cc cc cc cc 41 57 41 56 41 55 41 54 55 53 48 89 fb
RSP: 0018:ffffc900051a76c8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffea00019ba2c0 RCX: 0000000000001000
RDX: 1ffff110025a56cd RSI: 0000000000000080 RDI: ffff888066e8b000
RBP: ffff888012d2a280 R08: 0000000000000001 R09: ffffed100cdd0000
R10: fffff94000337406 R11: 0000000000000000 R12: ffffed10025a5721
R13: dffffc0000000000 R14: ffffea00019bc000 R15: ffff888012d2b908
 clear_page arch/x86/include/asm/page_64.h:49 [inline]
 clear_highpage include/linux/highmem.h:203 [inline]
 kernel_init_free_pages+0x99/0x120 mm/page_alloc.c:1212
 split_map_pages+0x1ef/0x520 mm/compaction.c:99
 isolate_freepages mm/compaction.c:1613 [inline]
 compaction_alloc+0x15ef/0x2450 mm/compaction.c:1627
 unmap_and_move mm/migrate.c:1196 [inline]
 migrate_pages+0x7d1/0x35d0 mm/migrate.c:1472
 compact_zone+0x1abd/0x3820 mm/compaction.c:2365
 proactive_compact_node+0x103/0x1c0 mm/compaction.c:2611
 kcompactd+0x9b9/0xd10 mm/compaction.c:2884
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
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