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usb: gadget: composite: fix NULL pointer when a non standard request is received

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In case usb configuration is unknown (cdev->config == NULL), non standard
request should not be processed.
Remove also the cdev->config check below which will never happen.

This issue was seen using ums feature.

Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
This commit is contained in:
Christophe Kerello
2018-03-15 09:34:17 +01:00
committed by Marek Vasut
parent 003659bda9
commit d57ed4d9f2
1 changed files with 4 additions and 1 deletions
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5
drivers/usb/gadget/composite.c
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@@ -838,6 +838,9 @@ unknown:
ctrl->bRequestType, ctrl->bRequest, ctrl->bRequestType, ctrl->bRequest,
w_value, w_index, w_length); w_value, w_index, w_length);
if (!cdev->config)
goto done;
/* /*
* functions always handle their interfaces and endpoints... * functions always handle their interfaces and endpoints...
* punt other recipients (other, WUSB, ...) to the current * punt other recipients (other, WUSB, ...) to the current
@@ -882,7 +885,7 @@ unknown:
value = f->setup(f, ctrl); value = f->setup(f, ctrl);
else { else {
c = cdev->config; c = cdev->config;
if (c && c->setup) if (c->setup)
value = c->setup(c, ctrl); value = c->setup(c, ctrl);
} }