================================================================================ UBSAN: shift-out-of-bounds in kernel/sched/fair.c:7741:14 shift exponent 86 is too large for 64-bit type 'long unsigned int' CPU: 1 PID: 13261 Comm: kworker/u4:13 Not tainted 5.11.0-rc4-next-20210121-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: krdsd rds_tcp_accept_worker Call Trace: __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 detach_tasks kernel/sched/fair.c:7741 [inline] load_balance.cold+0x1d/0x2e kernel/sched/fair.c:9670 rebalance_domains+0x5cc/0xdb0 kernel/sched/fair.c:10058 __do_softirq+0x2bc/0xa29 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __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 do_softirq kernel/softirq.c:246 [inline] do_softirq+0xb5/0xe0 kernel/softirq.c:233 __local_bh_enable_ip+0xf4/0x110 kernel/softirq.c:196 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:745 [inline] ip_finish_output2+0x88b/0x21b0 net/ipv4/ip_output.c:231 __ip_finish_output net/ipv4/ip_output.c:308 [inline] __ip_finish_output+0x396/0x640 net/ipv4/ip_output.c:290 ip_finish_output+0x35/0x200 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:290 [inline] ip_output+0x196/0x310 net/ipv4/ip_output.c:432 dst_output include/net/dst.h:441 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] __ip_queue_xmit+0x8e9/0x1a00 net/ipv4/ip_output.c:532 __tcp_transmit_skb+0x188c/0x38f0 net/ipv4/tcp_output.c:1405 tcp_transmit_skb net/ipv4/tcp_output.c:1423 [inline] tcp_write_xmit+0xde7/0x6140 net/ipv4/tcp_output.c:2689 __tcp_push_pending_frames+0xaa/0x390 net/ipv4/tcp_output.c:2869 tcp_send_fin+0x117/0xbb0 net/ipv4/tcp_output.c:3426 tcp_shutdown net/ipv4/tcp.c:2636 [inline] tcp_shutdown+0x127/0x170 net/ipv4/tcp.c:2621 inet_shutdown+0x1a8/0x430 net/ipv4/af_inet.c:890 rds_tcp_accept_one+0x5e0/0xc10 net/rds/tcp_listen.c:214 rds_tcp_accept_worker+0x50/0x80 net/rds/tcp.c:515 process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 ================================================================================