4.19-stable review patch. If anyone has any objections, please let me know.
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From: YueHaibing yuehaibing@huawei.com
[ Upstream commit a4925311a5443126ecc90671a1604ea7b0f5b32e ]
fixes following Smatch static check warning:
./drivers/pinctrl/sunxi/pinctrl-sunxi.c:1112 sunxi_pinctrl_build_state() warn: passing devm_ allocated variable to kfree. 'pctrl->functions'
As we will be calling krealloc() on pointer 'pctrl->functions', which means kfree() will be called in there, devm_kzalloc() shouldn't be used with the allocation in the first place. Fix the warning by calling kcalloc() and managing the free procedure in error path on our own.
Fixes: 0e37f88d9ad8 ("ARM: sunxi: Add pinctrl driver for Allwinner SoCs") Signed-off-by: YueHaibing yuehaibing@huawei.com Acked-by: Maxime Ripard maxime.ripard@bootlin.com Signed-off-by: Linus Walleij linus.walleij@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pinctrl/sunxi/pinctrl-sunxi.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-)
--- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c @@ -1079,10 +1079,9 @@ static int sunxi_pinctrl_build_state(str * We suppose that we won't have any more functions than pins, * we'll reallocate that later anyway */ - pctl->functions = devm_kcalloc(&pdev->dev, - pctl->ngroups, - sizeof(*pctl->functions), - GFP_KERNEL); + pctl->functions = kcalloc(pctl->ngroups, + sizeof(*pctl->functions), + GFP_KERNEL); if (!pctl->functions) return -ENOMEM;
@@ -1133,8 +1132,10 @@ static int sunxi_pinctrl_build_state(str
func_item = sunxi_pinctrl_find_function_by_name(pctl, func->name); - if (!func_item) + if (!func_item) { + kfree(pctl->functions); return -EINVAL; + }
if (!func_item->groups) { func_item->groups = @@ -1142,8 +1143,10 @@ static int sunxi_pinctrl_build_state(str func_item->ngroups, sizeof(*func_item->groups), GFP_KERNEL); - if (!func_item->groups) + if (!func_item->groups) { + kfree(pctl->functions); return -ENOMEM; + } }
func_grp = func_item->groups;