4.19-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan+linaro@kernel.org
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 --- drivers/base/regmap/regmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1343,7 +1343,7 @@ static int dev_get_regmap_match(struct d
/* 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; }