If soc_device_match() is used to check the value of a specific attribute that is not present for the current SoC, the kernel crashes with a NULL pointer dereference.
Fix this by explicitly checking for the absence of a needed property, and considering this a non-match. Signed-off-by: Geert Uytterhoeven <[email protected]> --- drivers/base/soc.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/base/soc.c b/drivers/base/soc.c index 37c087096b1c5675..545cc9cf2789fe07 100644 --- a/drivers/base/soc.c +++ b/drivers/base/soc.c @@ -185,19 +185,23 @@ static int soc_device_match_one(struct device *dev, void *arg) const struct soc_device_attribute *match = arg; if (match->machine && - !glob_match(match->machine, soc_dev->attr->machine)) + (!soc_dev->attr->machine || + !glob_match(match->machine, soc_dev->attr->machine))) return 0; if (match->family && - !glob_match(match->family, soc_dev->attr->family)) + (!soc_dev->attr->family || + !glob_match(match->family, soc_dev->attr->family))) return 0; if (match->revision && - !glob_match(match->revision, soc_dev->attr->revision)) + (!soc_dev->attr->revision || + !glob_match(match->revision, soc_dev->attr->revision))) return 0; if (match->soc_id && - !glob_match(match->soc_id, soc_dev->attr->soc_id)) + (!soc_dev->attr->soc_id || + !glob_match(match->soc_id, soc_dev->attr->soc_id))) return 0; return 1; -- 1.9.1
