usb: gadget: u_serial: Add null pointer check in gserial_suspend

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Consider a case where gserial_disconnect has already cleared
gser->ioport. And if gserial_suspend gets called afterwards,
it will lead to accessing of gser->ioport and thus causing
null pointer dereference.

Avoid this by adding a null pointer check. Added a static
spinlock to prevent gser->ioport from becoming null after
the newly added null pointer check.

Fixes: aba3a8d01d ("usb: gadget: u_serial: add suspend resume callbacks")
Signed-off-by: Prashanth K <quic_prashk@quicinc.com>
Link: https://lore.kernel.org/r/1683278317-11774-1-git-send-email-quic_prashk@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Prashanth K 2023-05-05 14:48:37 +05:30 • committed by Greg Kroah-Hartman

parent 24520e51ff

commit 2f6ecb89fe

1 changed files with 11 additions and 2 deletions

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drivers/usb/gadget/function/u_serial.c

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