Hello, syzbot found the following issue on: HEAD commit: 84196390 Merge tag 'selinux-pr-20210322' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12ea778ad00000 kernel config: https://syzkaller.appspot.com/x/.config?x=5adab0bdee099d7a dashboard link: https://syzkaller.appspot.com/bug?extid=3dea30b047f41084de66 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15449662d00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14f81026d00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3dea30b047f41084de66@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================================ UBSAN: shift-out-of-bounds in drivers/usb/usbip/vhci_hcd.c:605:42 shift exponent 768 is too large for 32-bit type 'int' CPU: 0 PID: 8421 Comm: syz-executor852 Not tainted 5.12.0-rc4-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+0x141/0x1d7 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:327 vhci_hub_control.cold+0x20b/0x5f0 drivers/usb/usbip/vhci_hcd.c:605 rh_call_control drivers/usb/core/hcd.c:683 [inline] rh_urb_enqueue drivers/usb/core/hcd.c:841 [inline] usb_hcd_submit_urb+0xcaf/0x22d0 drivers/usb/core/hcd.c:1544 usb_submit_urb+0x6e4/0x1540 drivers/usb/core/urb.c:585 usb_start_wait_urb+0x101/0x4c0 drivers/usb/core/message.c:58 usb_internal_control_msg drivers/usb/core/message.c:102 [inline] usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:153 do_proc_control+0x4af/0x980 drivers/usb/core/devio.c:1165 proc_control drivers/usb/core/devio.c:1191 [inline] usbdev_do_ioctl drivers/usb/core/devio.c:2535 [inline] usbdev_ioctl+0x10e2/0x36c0 drivers/usb/core/devio.c:2708 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x443499 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd96535f58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004004a0 RCX: 0000000000443499 RDX: 0000000020000000 RSI: 00000000c0185500 RDI: 0000000000000003 RBP: 0000000000403040 R08: 0000000000000000 R09: 00000000004004a0 R10: 000000000000000f R11: 0000000000000246 R12: 00000000004030d0 R13: 0000000000000000 R14: 00000000004b1018 R15: 00000000004004a0 ================================================================================ --- 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
