================================================================================ UBSAN: shift-out-of-bounds in drivers/media/rc/mceusb.c:704:13 shift exponent 258 is too large for 32-bit type 'unsigned int' CPU: 0 PID: 2625 Comm: systemd-journal Not tainted 5.11.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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 mceusb_dev_printdata.cold+0x19/0x1e drivers/media/rc/mceusb.c:704 mceusb_process_ir_data drivers/media/rc/mceusb.c:1275 [inline] mceusb_dev_recv+0x3cf/0x18c0 drivers/media/rc/mceusb.c:1376 __usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1656 usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1726 dummy_timer+0x11f4/0x32a0 drivers/usb/gadget/udc/dummy_hcd.c:1971 call_timer_fn+0x1a5/0x630 kernel/time/timer.c:1417 expire_timers kernel/time/timer.c:1462 [inline] __run_timers.part.0+0x67c/0xa10 kernel/time/timer.c:1731 __run_timers kernel/time/timer.c:1712 [inline] run_timer_softirq+0x80/0x120 kernel/time/timer.c:1744 __do_softirq+0x1b0/0x944 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+0x80/0xa0 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+0x110/0x1a0 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:197 Code: 00 00 00 4d 8b 0b 48 0f bd c8 49 8b 14 24 48 63 c9 e9 66 ff ff ff 4c 01 ca 49 89 13 e9 12 fd ff ff 66 0f 1f 84 00 00 00 00 00 <65> 8b 05 79 51 c2 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b RSP: 0018:ffffc90000247c38 EFLAGS: 00000206 RAX: 00000000002f80eb RBX: 0000000000000a37 RCX: ffffffff81268657 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8129382c RBP: 00000000000018ef R08: 0000000000000001 R09: ffffffff8a1c2657 R10: fffffbfff14384ca R11: 0000000000000000 R12: 0000000000000041 R13: 0000000000000000 R14: ffffffff81293710 R15: 0000000000000001 devkmsg_poll+0x122/0x1d0 kernel/printk/printk.c:832 vfs_poll include/linux/poll.h:90 [inline] ep_item_poll+0xf4/0x190 fs/eventpoll.c:840 ep_send_events fs/eventpoll.c:1677 [inline] ep_poll fs/eventpoll.c:1792 [inline] do_epoll_wait+0x724/0x1920 fs/eventpoll.c:2220 __do_sys_epoll_wait fs/eventpoll.c:2232 [inline] __se_sys_epoll_wait fs/eventpoll.c:2227 [inline] __x64_sys_epoll_wait+0x158/0x270 fs/eventpoll.c:2227 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f883d4fd2e3 Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 29 54 2b 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 0b c2 00 00 48 89 04 24 RSP: 002b:00007ffe98b8b2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 0000564616ea11e0 RCX: 00007f883d4fd2e3 RDX: 0000000000000013 RSI: 00007ffe98b8b300 RDI: 0000000000000008 RBP: 00007ffe98b8b4f0 R08: 0000564616eac390 R09: 00007ffe98bd0080 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe98b8b300 R13: 0000000000000001 R14: 0000000000000000 R15: 0005bb9d70f723a0 ================================================================================