Hello Krzysztof Opasiak,
This is a semi-automatic email about new static checker warnings.
The patch 749494b6bdbb: "usb: gadget: f_hid: fix: Move IN request
allocation to set_alt()" from Jan 24, 2017, leads to the following
Smatch complaint:
drivers/usb/gadget/function/f_hid.c:382 f_hidg_write()
warn: variable dereferenced before check 'hidg->req' (see line 370)
drivers/usb/gadget/function/f_hid.c
369 spin_unlock_irqrestore(&hidg->write_spinlock, flags);
370 status = copy_from_user(hidg->req->buf, buffer, count);
^^^^^^^^^^^^^^
Dereference.
371
372 if (status != 0) {
373 ERROR(hidg->func.config->cdev,
374 "copy_from_user error\n");
375 status = -EINVAL;
376 goto release_write_pending;
377 }
378
379 spin_lock_irqsave(&hidg->write_spinlock, flags);
380
381 /* we our function has been disabled by host */
382 if (!hidg->req) {
^^^^^^^^^
Check too late.
383 free_ep_req(hidg->in_ep, hidg->req);
^^^^^^^^^
This is also a dereference.
384 /*
regards,
dan carpenter
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