usb: gadget: fix null pointer dereference in usb_put_function_instance()

usb_put_function_instance() attempts to dereference fd inside fi struct
to get mod in uvc_alloc_inst() error path. However, fd is not allocated
until later in try_get_usb_function_instance() after allocating fi in
uvc_alloc_inst() and thus guranteed to be null in error path. Fix this
by adding a null check for fi->fd that returns if fd is null.

Reported-by: syzbot+fd6ef980cf1c722be639@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=fd6ef980cf1c722be639
Fixes: 0062f6e56f70 ("usb: gadget: add a forward pointer from usb_function to its "instance"")
Cc: stable <stable@kernel.org>
Signed-off-by: Jeffin Philip <jeffinphilip14@gmail.com>
Link: https://patch.msgid.link/20260816061712.15547-1-jeffinphilip14@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

0 files changed, 0 insertions, 0 deletions