Commit 1d434d83 authored Oct 06, 2023 by Johan Hovold Committed by Greg Kroah-Hartman Oct 25, 2023

regmap: fix NULL deref on lookup



commit c6df843348d6b71ea986266c12831cb60c2cf325 upstream.

Not all regmaps have a name so make sure to check for that to avoid
dereferencing a NULL pointer when dev_get_regmap() is used to lookup a
named regmap.

Fixes: e84861fec32d ("regmap: dev_get_regmap_match(): fix string comparison")
Cc: stable@vger.kernel.org      # 5.8
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20231006082104.16707-1-johan+linaro@kernel.org


Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 76050b0c

drivers/base/regmap/regmap.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1363,7 +1363,7 @@ static int dev_get_regmap_match(struct device dev, void res, void *data)

		/* If the user didn't specify a name match any */
		if (data)
		return !strcmp((*r)->name, data);
		return (r)->name && !strcmp((r)->name, data);
		else
		return 1;
		}