USB: iowarrior: fix NULL-deref at probe

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commit b7321e81fc upstream.

Make sure to check for the required interrupt-in endpoint to avoid
dereferencing a NULL-pointer should a malicious device lack such an
endpoint.

Note that a fairly recent change purported to fix this issue, but added
an insufficient test on the number of endpoints only, a test which can
now be removed.

Fixes: 4ec0ef3a82 ("USB: iowarrior: fix oops with malicious USB descriptors")
Fixes: 946b960d13 ("USB: add driver for iowarrior devices.")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Johan Hovold 2017-03-07 16:11:03 +01:00 • committed by Ben Hutchings

parent 174e03cdb2

commit d2d603cf8f

1 changed files with 7 additions and 6 deletions

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drivers/usb/misc/iowarrior.c

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