usb: musb: host: fix potential NULL pointer dereference

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commit 2b63f1329d upstream.

musb_start_urb() doesn't check the pass-in parameter if it is NULL.  But
in musb_bulk_nak_timeout() the parameter passed to musb_start_urb() is
returned from first_qh(), which could be NULL.

So wrap the musb_start_urb() call here with a if condition check to
avoid the potential NULL pointer dereference.

Fixes: f283862f3b ("usb: musb: NAK timeout scheme on bulk TX endpoint")
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Bin Liu 2018-04-30 11:20:53 -05:00 • committed by Ben Hutchings

parent ef85a17cbe

commit f662c848f8

1 changed files with 3 additions and 1 deletions

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drivers/usb/musb/musb_host.c

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