On 2/15/21 3:18 PM, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 291009f6 Merge tag 'pm-5.11-rc8' of git://git.kernel.org/p.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=17cd1098d00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=6a218c95bd23063a > dashboard link: https://syzkaller.appspot.com/bug?extid=ee5ce0deec4ff5aa64e1 > compiler: Debian clang version 11.0.1-2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10410288d00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13642124d00000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+ee5ce0deec4ff5aa64e1@xxxxxxxxxxxxxxxxxxxxxxxxx > > ================================================================================ > 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: 0 Comm: swapper/1 Not tainted 5.11.0-rc7-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+0x137/0x1be lib/dump_stack.c:120 > ubsan_epilogue lib/ubsan.c:148 [inline] > __ubsan_handle_shift_out_of_bounds+0x432/0x4d0 lib/ubsan.c:395 > snto32 drivers/hid/hid-core.c:1315 [inline] > hid_input_field drivers/hid/hid-core.c:1548 [inline] > hid_report_raw_event+0xa9d/0x1480 drivers/hid/hid-core.c:1783 > hid_input_report+0x3f6/0x4d0 drivers/hid/hid-core.c:1850 > hid_irq_in+0x48d/0x690 drivers/hid/usbhid/hid-core.c:284 > __usb_hcd_giveback_urb+0x375/0x520 drivers/usb/core/hcd.c:1656 > dummy_timer+0xa22/0x2e70 drivers/usb/gadget/udc/dummy_hcd.c:1971 > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > syzbot can test patches for this issue, for details see: > https://goo.gl/tpsmEJ#testing-patches #syz dup: UBSAN: shift-out-of-bounds in snto32 -- ~Randy
