gpio: don't free unallocated ida on gpiochip_add_data_with_key() error path

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commit a05a140499 upstream.

The change corrects the error path in gpiochip_add_data_with_key()
by avoiding to call ida_simple_remove(), if ida_simple_get() returns
an error.

Note that ida_simple_remove()/ida_free() throws a BUG(), if id argument
is negative, it allows to easily check the correctness of the fix by
fuzzing the return value from ida_simple_get().

Fixes: ff2b135922 ("gpio: make the gpiochip a real device")
Cc: stable@vger.kernel.org # v4.6+
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Vladimir Zapolskiy 2018-11-02 15:39:43 +02:00 • committed by Greg Kroah-Hartman

parent 6d24302acc

commit 602162dce8

1 changed files with 3 additions and 2 deletions

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drivers/gpio/gpiolib.c

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