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UBSAN: shift-out-of-bounds in kernel/sched/fair.c:7712:14
shift exponent 147 is too large for 64-bit type 'long unsigned int'
CPU: 3 PID: 22401 Comm: syz-executor.2 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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:199
Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 0e f9 53 f8 48 89 ef e8 46 af 54 f8 e8 c1 3c 74 f8 fb bf 01 00 00 00 <e8> 36 7d 48 f8 65 8b 05 df 47 fc 76 85 c0 74 02 5d c3 e8 3b 9d fa
RSP: 0018:ffffc90029b57920 EFLAGS: 00000206
RAX: 000000000025b981 RBX: 0000000000000402 RCX: 1ffffffff1f54bc2
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: ffff88802cd35180 R08: 0000000000000001 R09: ffffffff8fa9a8bf
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88802cd35180
R13: ffff888010d9d4c0 R14: 0000000000000000 R15: ffff88801472b880
 finish_lock_switch kernel/sched/core.c:4074 [inline]
 finish_task_switch.isra.0+0x15d/0x810 kernel/sched/core.c:4191
 context_switch kernel/sched/core.c:4325 [inline]
 __schedule+0x919/0x21b0 kernel/sched/core.c:5073
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:5233
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:35
 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock+0x36/0x40 kernel/locking/spinlock.c:183
 spin_unlock include/linux/spinlock.h:394 [inline]
 write_sequnlock include/linux/seqlock.h:904 [inline]
 unlock_mount_hash fs/namespace.c:107 [inline]
 drop_collected_mounts fs/namespace.c:1936 [inline]
 put_mnt_ns fs/namespace.c:4250 [inline]
 put_mnt_ns+0x101/0x140 fs/namespace.c:4246
 free_nsproxy+0x43/0x4c0 kernel/nsproxy.c:191
 put_nsproxy include/linux/nsproxy.h:105 [inline]
 switch_task_namespaces+0xaf/0xd0 kernel/nsproxy.c:249
 do_exit+0xbf7/0x2a60 kernel/exit.c:824
 do_group_exit+0x125/0x310 kernel/exit.c:922
 get_signal+0x47f/0x2150 kernel/signal.c:2781
 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:789
 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
 __do_fast_syscall_32+0x62/0x90 arch/x86/entry/common.c:143
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:165
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7fc5549
Code: Unable to access opcode bytes at RIP 0xf7fc551f.
RSP: 002b:00000000f55bf5fc EFLAGS: 00000296 ORIG_RAX: 0000000000000150
RAX: 0000000000000004 RBX: 0000000020000040 RCX: 0000000000000000
RDX: 00000000ffffffff RSI: 00000000ffffffff RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
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