================================================================================
UBSAN: shift-out-of-bounds in net/core/gen_estimator.c:83:38
shift exponent -1 is negative
CPU: 1 PID: 8539 Comm: syz-executor.1 Not tainted 5.11.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x107/0x163 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:395
 est_timer.cold+0xbb/0x12d net/core/gen_estimator.c:83
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1417
 expire_timers kernel/time/timer.c:1462 [inline]
 __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1731
 __run_timers kernel/time/timer.c:1712 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744
 __do_softirq+0x2bc/0xa29 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:226 [inline]
 __irq_exit_rcu kernel/softirq.c:420 [inline]
 irq_exit_rcu+0x134/0x200 kernel/softirq.c:432
 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
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 be d2 5c f8 48 89 ef e8 86 87 5d f8 e8 d1 a9 7c f8 fb bf 01 00 00 00 <e8> 36 8e 51 f8 65 8b 05 3f fd 05 77 85 c0 74 02 5d c3 e8 ab 52 04
RSP: 0018:ffffc90001ad7b58 EFLAGS: 00000202
RAX: 000000000145318f RBX: 0000000000000000 RCX: 1ffffffff1a06861
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: ffff8880b9f34c40 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff81789c78 R11: 000000000000003f R12: ffff8880b9f34c40
R13: ffff88808ad48000 R14: 0000000000000000 R15: ffff888014f51bc0
 finish_lock_switch kernel/sched/core.c:4065 [inline]
 finish_task_switch.isra.0+0x158/0x7e0 kernel/sched/core.c:4182
 context_switch kernel/sched/core.c:4316 [inline]
 __schedule+0x914/0x21a0 kernel/sched/core.c:5064
 schedule+0xcf/0x270 kernel/sched/core.c:5143
 freezable_schedule include/linux/freezer.h:172 [inline]
 do_nanosleep+0x268/0x6a0 kernel/time/hrtimer.c:1878
 hrtimer_nanosleep+0x1f9/0x430 kernel/time/hrtimer.c:1931
 __do_sys_nanosleep kernel/time/hrtimer.c:1965 [inline]
 __se_sys_nanosleep kernel/time/hrtimer.c:1952 [inline]
 __x64_sys_nanosleep+0x1dc/0x260 kernel/time/hrtimer.c:1952
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c6e1
Code: 75 14 b8 23 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 cf fb ff c3 48 83 ec 08 e8 0a 47 00 00 48 89 04 24 b8 23 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 47 00 00 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00000000016afd60 EFLAGS: 00000293 ORIG_RAX: 0000000000000023
RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 000000000045c6e1
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000016afd70
RBP: 00000000001d3ad4 R08: 0000000000000000 R09: 00000000027eb940
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000f27
R13: 0000000000000006 R14: 0000000000000032 R15: 00000000001d3649
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