USB: serial: mxuport: fix use-after-free in probe error path

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commit 9e45284984 upstream.

The interface read and event URBs are submitted in attach, but were
never explicitly unlinked by the driver. Instead the URBs would have
been killed by usb-serial core on disconnect.

In case of a late probe error (e.g. due to failed minor allocation),
disconnect is never called and we could end up with active URBs for an
unbound interface. This in turn could lead to deallocated memory being
dereferenced in the completion callbacks.

Fixes: ee467a1f20 ("USB: serial: add Moxa UPORT 12XX/14XX/16XX
driver")
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Johan Hovold 2016-05-08 20:08:01 +02:00 • committed by Ben Hutchings

parent d0d86631d0

commit f7336d69bb

1 changed files with 10 additions and 0 deletions

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drivers/usb/serial/mxuport.c

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