================================================================================
UBSAN: shift-out-of-bounds in net/core/gen_estimator.c:83:38
shift exponent -145 is negative
CPU: 1 PID: 8521 Comm: syz-executor.3 Not tainted 5.11.0-rc2-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_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x50 kernel/locking/spinlock.c:191
Code: f8 5d c3 66 90 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 6a 46 5d f8 48 89 ef e8 32 fb 5d f8 f6 c7 02 75 1a 53 9d <bf> 01 00 00 00 e8 e1 01 52 f8 65 8b 05 2a 72 06 77 85 c0 74 0a 5b
RSP: 0018:ffffc9000198f820 EFLAGS: 00000206
RAX: 0000000001bb04c7 RBX: 0000000000000206 RCX: 1ffffffff1a06809
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffffff8f2ae3d0 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff81789b38 R11: 0000000000000001 R12: dffffc0000000000
R13: ffffffff894d0520 R14: 1ffff92000331f0b R15: ffff88807101cce8
 debug_object_active_state lib/debugobjects.c:940 [inline]
 debug_object_active_state+0x260/0x350 lib/debugobjects.c:909
 debug_rcu_head_queue kernel/rcu/rcu.h:177 [inline]
 __call_rcu kernel/rcu/tree.c:2951 [inline]
 call_rcu+0x45/0x700 kernel/rcu/tree.c:3038
 dentry_free+0xc3/0x160 fs/dcache.c:350
 __dentry_kill+0x4c6/0x640 fs/dcache.c:593
 dentry_kill fs/dcache.c:717 [inline]
 dput+0x635/0xbc0 fs/dcache.c:885
 proc_invalidate_siblings_dcache+0x443/0x600 fs/proc/inode.c:151
 release_task+0xc63/0x14d0 kernel/exit.c:222
 wait_task_zombie kernel/exit.c:1107 [inline]
 wait_consider_task+0x2fd2/0x3b70 kernel/exit.c:1334
 do_wait_thread kernel/exit.c:1397 [inline]
 do_wait+0x376/0xa00 kernel/exit.c:1468
 kernel_wait4+0x14c/0x260 kernel/exit.c:1630
 __do_sys_wait4+0x13f/0x150 kernel/exit.c:1658
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x417e0b
Code: 54 55 41 89 d4 53 48 89 f5 89 fb 48 83 ec 10 e8 7b f9 ff ff 45 31 d2 41 89 c0 49 63 d4 48 89 ee 48 63 fb b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 19 44 89 c7 89 44 24 0c e8 b1 f9 ff ff 8b 44
RSP: 002b:00007ffe34c764d0 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 0000000000417e0b
RDX: 0000000040000001 RSI: 00007ffe34c76550 RDI: ffffffffffffffff
RBP: 00007ffe34c76550 R08: 0000000000000000 R09: 0000000001b97940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000040000001
R13: 0000000000000009 R14: 0000000000000032 R15: 0000000000179db8
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