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HID: hiddev: Fix slab-out-of-bounds write in hiddev_ioctl_usage()
authorPeilin Ye <yepeilin.cs@gmail.com>
Wed, 29 Jul 2020 11:37:12 +0000 (07:37 -0400)
committerJiri Kosina <jkosina@suse.cz>
Mon, 17 Aug 2020 10:21:09 +0000 (12:21 +0200)
commite591b2ee4f5112de323cfc7b9cee40285d1c245e
tree68458bde7faf05ac20a76015b501b1481fb40afetree | snapshot
parent1cbe55b7a0ff33ad53b70ee72bcc5199fcd431f1commit | diff
HID: hiddev: Fix slab-out-of-bounds write in hiddev_ioctl_usage()

`uref->usage_index` is not always being properly checked, causing
hiddev_ioctl_usage() to go out of bounds under some cases. Fix it.

Reported-by: syzbot+34ee1b45d88571c2fa8b@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=f2aebe90b8c56806b050a20b36f51ed6acabe802
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
drivers/hid/usbhid/hiddev.c diff | blob | history
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