6.6-stable review patch. If anyone has any objections, please let me know.
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From: Ingo Rohloff ingo.rohloff@lauterbach.com
commit 9466545720e231fc02acd69b5f4e9138e09a26f6 upstream.
Since commit c033563220e0f7a8 ("usb: gadget: configfs: Attach arbitrary strings to cdev") a user can provide extra string descriptors to a USB gadget via configfs.
For "manufacturer", "product", "serialnumber", setting the string via configfs ignores a trailing LF.
For the arbitrary strings the LF was not ignored.
This patch ignores a trailing LF to make this consistent with the existing behavior for "manufacturer", ... string descriptors.
Fixes: c033563220e0 ("usb: gadget: configfs: Attach arbitrary strings to cdev") Cc: stable stable@kernel.org Signed-off-by: Ingo Rohloff ingo.rohloff@lauterbach.com Link: https://lore.kernel.org/r/20241212154114.29295-1-ingo.rohloff@lauterbach.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/gadget/configfs.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/usb/gadget/configfs.c +++ b/drivers/usb/gadget/configfs.c @@ -824,11 +824,15 @@ static ssize_t gadget_string_s_store(str { struct gadget_string *string = to_gadget_string(item); int size = min(sizeof(string->string), len + 1); + ssize_t cpy_len;
if (len > USB_MAX_STRING_LEN) return -EINVAL;
- return strscpy(string->string, page, size); + cpy_len = strscpy(string->string, page, size); + if (cpy_len > 0 && string->string[cpy_len - 1] == '\n') + string->string[cpy_len - 1] = 0; + return len; } CONFIGFS_ATTR(gadget_string_, s);