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usb: gadget: Check bmAttributes only if configuration is valid

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commit 8e812e9355a6f14dffd54a33d951ca403b9732f5 upstream.

If the USB configuration is not valid, then avoid checking for
bmAttributes to prevent null pointer deference.

Cc: stable <stable@kernel.org>
Fixes: 40e89ff5750f ("usb: gadget: Set self-powered based on MaxPower and bmAttributes")
Signed-off-by: Prashanth K <prashanth.k@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250224085604.417327-1-prashanth.k@oss.qualcomm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Prashanth K 2025-02-24 14:26:04 +05:30 • committed by Greg Kroah-Hartman
commit 19b3918840
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/gadget/composite.c
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@ -916,7 +916,7 @@ static int set_config(struct usb_composite_dev *cdev,
power = min(power, 900U);
done:
if (power > USB_SELF_POWER_VBUS_MAX_DRAW ||
!(c->bmAttributes & USB_CONFIG_ATT_SELFPOWER))
(c && !(c->bmAttributes & USB_CONFIG_ATT_SELFPOWER)))
usb_gadget_clear_selfpowered(gadget);
else
usb_gadget_set_selfpowered(gadget);