[PATCH AUTOSEL 4.19 041/237] pinctrl: sunxi: Fix a memory leak in 'sunxi_pinctrl_build_state()'
STALE2510d
REVIEWED: 1 (0M)
From: Sasha Levin <sashal@kernel.org>
Date: 2019-11-16 15:42:02
Also in:
lkml, stable
Subsystem:
arm/allwinner sunxi soc support, pin control subsystem, the rest · Maintainers:
Chen-Yu Tsai, Jernej Skrabec, Samuel Holland, Linus Walleij, Linus Torvalds
1 review trailer.
From: Christophe JAILLET <redacted> [ Upstream commit a93a676b079144009f55fff2ab0e34c3b7258c8a ] If 'krealloc()' fails, 'pctl->functions' is set to NULL. We should instead use a temp variable in order to be able to free the previously allocated memeory, in case of OOM. Signed-off-by: Christophe JAILLET <redacted> Acked-by: Maxime Ripard <redacted> Signed-off-by: Linus Walleij <redacted> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/pinctrl/sunxi/pinctrl-sunxi.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c
index 26ebedc1f6d31..61aaaf58c5993 100644
--- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c
+++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c@@ -1042,6 +1042,7 @@ static int sunxi_pinctrl_add_function(struct sunxi_pinctrl *pctl, static int sunxi_pinctrl_build_state(struct platform_device *pdev) { struct sunxi_pinctrl *pctl = platform_get_drvdata(pdev); + void *ptr; int i; /*
@@ -1108,13 +1109,15 @@ static int sunxi_pinctrl_build_state(struct platform_device *pdev) } /* And now allocated and fill the array for real */ - pctl->functions = krealloc(pctl->functions, - pctl->nfunctions * sizeof(*pctl->functions), - GFP_KERNEL); - if (!pctl->functions) { + ptr = krealloc(pctl->functions, + pctl->nfunctions * sizeof(*pctl->functions), + GFP_KERNEL); + if (!ptr) { kfree(pctl->functions); + pctl->functions = NULL; return -ENOMEM; } + pctl->functions = ptr; for (i = 0; i < pctl->desc->npins; i++) { const struct sunxi_desc_pin *pin = pctl->desc->pins + i;
--
2.20.1