From: Andrey Konovalov Date: Tue, 21 Oct 2025 22:25:45 +0000 (+0200) Subject: usb: raw-gadget: do not limit transfer length X-Git-Tag: v6.1.158~52 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=284515bbdcec8e20b9681fd2e12ecb3af0a00ade;p=thirdparty%2Fkernel%2Fstable.git usb: raw-gadget: do not limit transfer length commit 37b9dd0d114a0e38c502695e30f55a74fb0c37d0 upstream. Drop the check on the maximum transfer length in Raw Gadget for both control and non-control transfers. Limiting the transfer length causes a problem with emulating USB devices whose full configuration descriptor exceeds PAGE_SIZE in length. Overall, there does not appear to be any reason to enforce any kind of transfer length limit on the Raw Gadget side for either control or non-control transfers, so let's just drop the related check. Cc: stable Fixes: f2c2e717642c ("usb: gadget: add raw-gadget interface") Signed-off-by: Andrey Konovalov Link: https://patch.msgid.link/a6024e8eab679043e9b8a5defdb41c4bda62f02b.1761085528.git.andreyknvl@gmail.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/gadget/legacy/raw_gadget.c b/drivers/usb/gadget/legacy/raw_gadget.c index ea106ad665a1..2deab4a6030d 100644 --- a/drivers/usb/gadget/legacy/raw_gadget.c +++ b/drivers/usb/gadget/legacy/raw_gadget.c @@ -620,8 +620,6 @@ static void *raw_alloc_io_data(struct usb_raw_ep_io *io, void __user *ptr, return ERR_PTR(-EINVAL); if (!usb_raw_io_flags_valid(io->flags)) return ERR_PTR(-EINVAL); - if (io->length > PAGE_SIZE) - return ERR_PTR(-EINVAL); if (get_from_user) data = memdup_user(ptr + sizeof(*io), io->length); else {