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UBSAN: shift-out-of-bounds in net/core/gen_estimator.c:83:38
shift exponent -123 is negative
CPU: 0 PID: 9647 Comm: syz-executor.0 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+0x183/0x22e lib/dump_stack.c:120
 ubsan_epilogue lib/ubsan.c:148 [inline]
 __ubsan_handle_shift_out_of_bounds+0x432/0x4d0 lib/ubsan.c:395
 est_timer+0x8c6/0x950 net/core/gen_estimator.c:83
 call_timer_fn+0xf6/0x210 kernel/time/timer.c:1417
 expire_timers kernel/time/timer.c:1462 [inline]
 __run_timers+0x6ff/0x910 kernel/time/timer.c:1731
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1744
 __do_softirq+0x372/0x7a6 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+0x9a/0xe0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:226 [inline]
 __irq_exit_rcu+0x22c/0x260 kernel/softirq.c:420
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:432
 sysvec_apic_timer_interrupt+0xe0/0xf0 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
RIP: 0010:free_unref_page_list+0x4e3/0x530 mm/page_alloc.c:3290
Code: 43 ca ff e9 04 ff ff ff 4c 8b 74 24 08 44 89 f3 81 e3 00 02 00 00 48 85 db 74 05 e8 b7 3e ca ff 4c 89 74 24 30 ff 74 24 30 9d <48> c7 44 24 40 0e 36 e0 45 48 8b 44 24 28 49 c7 04 04 00 00 00 00
RSP: 0018:ffffc90017dbf0c0 EFLAGS: 00000246
RAX: b69434e5bc74bb00 RBX: 0000000000000200 RCX: ffffffff8f8f1a03
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90017dbf1b0 R08: ffffffff81834a30 R09: fffff94000095af7
R10: fffff94000095af7 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffc90017dbf260 R14: 0000000000000246 R15: ffffc90017dbf260
 release_pages+0x167c/0x1850 mm/swap.c:934
 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:242 [inline]
 tlb_flush_mmu+0x780/0x910 mm/mmu_gather.c:249
 zap_pte_range+0x19c7/0x1b60 mm/memory.c:1330
 zap_pmd_range mm/memory.c:1368 [inline]
 zap_pud_range mm/memory.c:1397 [inline]
 zap_p4d_range mm/memory.c:1418 [inline]
 unmap_page_range+0x556/0x880 mm/memory.c:1439
 unmap_vmas+0x1d1/0x360 mm/memory.c:1516
 exit_mmap+0x2b8/0x600 mm/mmap.c:3220
 __mmput+0x111/0x370 kernel/fork.c:1083
 exit_mm+0x679/0x7d0 kernel/exit.c:501
 do_exit+0x6ec/0x2490 kernel/exit.c:812
 do_group_exit+0x168/0x2d0 kernel/exit.c:922
 get_signal+0x16b5/0x2030 kernel/signal.c:2770
 arch_do_signal_or_restart+0x8e/0x6a0 arch/x86/kernel/signal.c:811
 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+0xac/0x1e0 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x48/0x190 kernel/entry/common.c:302
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
Code: Unable to access opcode bytes at RIP 0x45e1ef.
RSP: 002b:00007f1ad1cd6cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 000000000119c030 RCX: 000000000045e219
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 000000000119c034
RBP: 000000000119c028 R08: 000000000000000e R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 000000000119c034
R13: 00007fff65f7bb0f R14: 00007f1ad1cd79c0 R15: 000000000119c034
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