================================================================================ UBSAN: shift-out-of-bounds in drivers/hid/hid-core.c:1315:20 shift exponent 4294967295 is too large for 32-bit type 'int' CPU: 1 PID: 4889 Comm: systemd-journal Not tainted 5.11.0-rc2-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 snto32.cold+0x37/0x3c drivers/hid/hid-core.c:1315 hid_input_field drivers/hid/hid-core.c:1548 [inline] hid_report_raw_event+0x7a9/0x11b0 drivers/hid/hid-core.c:1783 hid_input_report+0x360/0x4c0 drivers/hid/hid-core.c:1850 hid_irq_in+0x50e/0x690 drivers/hid/usbhid/hid-core.c:284 __usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1657 usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1728 dummy_timer+0x11f4/0x32a0 drivers/usb/gadget/udc/dummy_hcd.c:1971 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 __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:compound_head include/linux/page-flags.h:184 [inline] RIP: 0010:check_heap_object mm/usercopy.c:236 [inline] RIP: 0010:__check_object_size mm/usercopy.c:286 [inline] RIP: 0010:__check_object_size+0x1e9/0x3f0 mm/usercopy.c:256 Code: 48 b8 00 00 00 00 00 ea ff ff 49 c1 e6 06 49 01 c6 48 b8 00 00 00 00 00 fc ff df 4d 8d 7e 08 4c 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 ce 01 00 00 49 8b 46 08 31 ff 48 89 44 24 08 83 e0 01 48 89 RSP: 0018:ffffc900013efc20 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000fe0 RCX: 0000000000000000 RDX: 1ffffd40002cdae1 RSI: ffffffff8132dee4 RDI: 0000000000000003 RBP: ffff888059b5d400 R08: 0000000000000000 R09: 0000000000000030 R10: ffffffff8132deda R11: 000000000000003f R12: ffff888059b5c420 R13: 0000000000000000 R14: ffffea000166d700 R15: ffffea000166d708 check_object_size include/linux/thread_info.h:169 [inline] strncpy_from_user+0xaa/0x3e0 lib/strncpy_from_user.c:137 getname_flags.part.0+0x95/0x4f0 fs/namei.c:149 getname_flags fs/namei.c:2649 [inline] user_path_at_empty+0xa1/0x100 fs/namei.c:2649 user_path_at include/linux/namei.h:59 [inline] vfs_statx+0x142/0x390 fs/stat.c:185 vfs_fstatat fs/stat.c:207 [inline] vfs_lstat include/linux/fs.h:3122 [inline] __do_sys_newlstat+0x91/0x110 fs/stat.c:362 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f01c9ab9335 Code: 69 db 2b 00 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 83 ff 01 48 89 f0 77 30 48 89 c7 48 89 d6 b8 06 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 03 f3 c3 90 48 8b 15 31 db 2b 00 f7 d8 64 89 RSP: 002b:00007ffc1e27c5f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000006 RAX: ffffffffffffffda RBX: 00005643fd6dd120 RCX: 00007f01c9ab9335 RDX: 00007ffc1e27c630 RSI: 00007ffc1e27c630 RDI: 00005643fd6dc120 RBP: 00007ffc1e27c6f0 R08: 0000000000000003 R09: 0000000000001010 R10: 00005643fd6da5f0 R11: 0000000000000246 R12: 00005643fd6dc120 R13: 00005643fd6dc152 R14: 00005643fd6dad14 R15: 00005643fd6dad1b ================================================================================