6.1-stable review patch. If anyone has any objections, please let me know.
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From: Andrey Konovalov andreyknvl@gmail.com
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 stable@kernel.org Fixes: f2c2e717642c ("usb: gadget: add raw-gadget interface") Signed-off-by: Andrey Konovalov andreyknvl@gmail.com Link: https://patch.msgid.link/a6024e8eab679043e9b8a5defdb41c4bda62f02b.1761085528... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/gadget/legacy/raw_gadget.c | 2 -- 1 file changed, 2 deletions(-)
--- 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 us 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 {