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Date:   Wed, 24 Mar 2021 10:36:14 -0700
Message-ID: <0000000000004dcb8c05be4bbcf8@google.com>
Subject: [syzbot] UBSAN: shift-out-of-bounds in vhci_hub_control (2)
From:   syzbot <syzbot+3dea30b047f41084de66@syzkaller.appspotmail.com>
To:     gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org,
        linux-usb@vger.kernel.org, shuah@kernel.org,
        syzkaller-bugs@googlegroups.com, valentina.manea.m@gmail.com
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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@syzkaller.appspotmail.com

================================================================================
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
================================================================================


---
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