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UBSAN: shift-out-of-bounds in net/core/gen_estimator.c:83:38
shift exponent -246 is negative
CPU: 0 PID: 21335 Comm: syz-fuzzer Not tainted 5.11.0-rc3-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: 0033:0x58b81c
Code: 08 48 8b 40 10 48 8b 49 20 48 89 04 24 ff d1 48 8b 44 24 08 48 89 44 24 50 48 8b 6c 24 38 48 83 c4 40 c3 48 8b 1d 2c 36 53 01 <48> 89 74 24 28 48 89 5c 24 30 e9 db fe ff ff e8 60 96 ed ff 48 89
RSP: 002b:000000c00dbea3b8 EFLAGS: 00000213
RAX: 0000000000003650 RBX: 000000c00000c060 RCX: 000000c000082d80
RDX: 000000c00c848160 RSI: 000000000088e300 RDI: 000000000088e300
RBP: 000000c00dbea3f0 R08: 0000000000b7bea0 R09: 0000000000b7bda0
R10: 0000000000000002 R11: 0000000000000011 R12: 00000000000000f1
R13: 0000000000000000 R14: 0000000000b355b5 R15: 0000000000000000
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