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UBSAN: shift-out-of-bounds in net/core/gen_estimator.c:83:38
shift exponent -1 is negative
CPU: 0 PID: 21189 Comm: syz-executor.0 Not tainted 5.10.0-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+0x1a5/0x710 kernel/time/timer.c:1417
 expire_timers kernel/time/timer.c:1462 [inline]
 __run_timers.part.0+0x692/0xa80 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/0xa77 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+0x17f/0x200 kernel/softirq.c:420
 irq_exit_rcu+0x5/0x20 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:zap_pte_range mm/memory.c:1265 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1368 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1397 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1418 [inline]
RIP: 0010:unmap_page_range+0xe7a/0x2640 mm/memory.c:1439
Code: 8b 5d 00 31 ff 48 c1 eb 10 83 e3 01 89 de e8 dd 63 cd ff 84 db 0f 84 43 04 00 00 e8 50 5d cd ff 48 89 ef e8 78 2f fa ff 89 c3 <e8> 41 5d cd ff 31 ff 89 de e8 b8 64 cd ff 85 db 0f 88 12 0e 00 00
RSP: 0018:ffffc900017df768 EFLAGS: 00000206
RAX: 0000000000000003 RBX: 0000000000000006 RCX: ffffffff81a4c4f5
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea0001439df0
RBP: ffffea0001439dc0 R08: 0000000000000000 R09: ffffea0001439df3
R10: fffff940002873be R11: 0000000000000000 R12: ffffea0001439df0
R13: ffff8880138bb338 R14: dffffc0000000000 R15: 00000000f6868000
 unmap_single_vma+0x198/0x300 mm/memory.c:1484
 unmap_vmas+0x168/0x2e0 mm/memory.c:1516
 exit_mmap+0x2b1/0x5a0 mm/mmap.c:3220
 __mmput+0x122/0x470 kernel/fork.c:1083
 mmput+0x53/0x60 kernel/fork.c:1104
 exit_mm kernel/exit.c:500 [inline]
 do_exit+0xa97/0x2a00 kernel/exit.c:810
 do_group_exit+0x125/0x310 kernel/exit.c:920
 get_signal+0x3e9/0x2160 kernel/signal.c:2770
 arch_do_signal_or_restart+0x2a8/0x1eb0 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+0x124/0x200 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302
 __do_fast_syscall_32+0x62/0x80 arch/x86/entry/common.c:138
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f32549
Code: Unable to access opcode bytes at RIP 0xf7f3251f.
RSP: 002b:00000000f552c12c EFLAGS: 00000292 ORIG_RAX: 00000000000000f0
RAX: fffffffffffffe00 RBX: 0000000008baafc8 RCX: 0000000000000080
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000008baafcc
RBP: 00000000f552c228 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
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