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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2014-06-11 13:17:41 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-09 17:00:45 -0700 |
| commit | b86e1926be37c77deeb176466d98678feab04066 (patch) | |
| tree | 45ef90e6c898522221deaa382034ef21a1f98183 | |
| parent | 8a26af30ff55bec82443e718e26efd6b3a8bba83 (diff) | |
| download | linux-b86e1926be37c77deeb176466d98678feab04066.tar.gz | |
mfd: vexpress: fix error handling vexpress_syscfg_regmap_init()
This function should be returning an ERR_PTR() on failure instead of NULL. Also there is a use after free bug if regmap_init() fails because we free "func" and then dereference doing the return. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/misc/vexpress-syscfg.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/misc/vexpress-syscfg.c b/drivers/misc/vexpress-syscfg.c index 73068e50e56d..3250fc1df0aa 100644 --- a/drivers/misc/vexpress-syscfg.c +++ b/drivers/misc/vexpress-syscfg.c @@ -199,7 +199,7 @@ static struct regmap *vexpress_syscfg_regmap_init(struct device *dev, func = kzalloc(sizeof(*func) + sizeof(*func->template) * num, GFP_KERNEL); if (!func) - return NULL; + return ERR_PTR(-ENOMEM); func->syscfg = syscfg; func->num_templates = num; @@ -231,10 +231,14 @@ static struct regmap *vexpress_syscfg_regmap_init(struct device *dev, func->regmap = regmap_init(dev, NULL, func, &vexpress_syscfg_regmap_config); - if (IS_ERR(func->regmap)) + if (IS_ERR(func->regmap)) { + void *err = func->regmap; + kfree(func); - else - list_add(&func->list, &syscfg->funcs); + return err; + } + + list_add(&func->list, &syscfg->funcs); return func->regmap; } |