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| author | Erick Archer <erick.archer@gmx.com> | 2024-01-19 19:19:09 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2024-01-28 01:17:26 +0100 |
| commit | f6f62a9a931f54607107196c029a8e0386591a71 (patch) | |
| tree | bb0df7f11805d206e16e0048225bb80f52ea5c8b /drivers/pinctrl | |
| parent | 8714b3414dd6070609fabdd73a70e5f818f77f24 (diff) | |
| download | linux-f6f62a9a931f54607107196c029a8e0386591a71.tar.gz | |
pinctrl: pinctrl-zynqmp: Use devm_kcalloc() instead of devm_kzalloc()
As noted in the "Deprecated Interfaces, Language Features, Attributes,
and Conventions" documentation [1], size calculations (especially
multiplication) should not be performed in memory allocator (or similar)
function arguments due to the risk of them overflowing. This could lead
to values wrapping around and a smaller allocation being made than the
caller was expecting. Using those allocations could lead to linear
overflows of heap memory and other misbehaviors.
So, use the purpose specific devm_kcalloc() function instead of the
argument size * count in the devm_kzalloc() function.
Link: https://www.kernel.org/doc/html/next/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments [1]
Link: https://github.com/KSPP/linux/issues/162
Signed-off-by: Erick Archer <erick.archer@gmx.com>
Acked-by: Michal Simek <michal.simek@amd.com>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20240119181909.7079-1-erick.archer@gmx.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/pinctrl-zynqmp.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/pinctrl/pinctrl-zynqmp.c b/drivers/pinctrl/pinctrl-zynqmp.c index f2be341f73e13..5c46b7d7ebcba 100644 --- a/drivers/pinctrl/pinctrl-zynqmp.c +++ b/drivers/pinctrl/pinctrl-zynqmp.c @@ -562,7 +562,7 @@ static int zynqmp_pinctrl_prepare_func_groups(struct device *dev, u32 fid, const char **fgroups; int ret, index, i; - fgroups = devm_kzalloc(dev, sizeof(*fgroups) * func->ngroups, GFP_KERNEL); + fgroups = devm_kcalloc(dev, func->ngroups, sizeof(*fgroups), GFP_KERNEL); if (!fgroups) return -ENOMEM; @@ -754,7 +754,7 @@ static int zynqmp_pinctrl_prepare_function_info(struct device *dev, if (ret) return ret; - funcs = devm_kzalloc(dev, sizeof(*funcs) * pctrl->nfuncs, GFP_KERNEL); + funcs = devm_kcalloc(dev, pctrl->nfuncs, sizeof(*funcs), GFP_KERNEL); if (!funcs) return -ENOMEM; @@ -768,7 +768,7 @@ static int zynqmp_pinctrl_prepare_function_info(struct device *dev, pctrl->ngroups += funcs[i].ngroups; } - groups = devm_kzalloc(dev, sizeof(*groups) * pctrl->ngroups, GFP_KERNEL); + groups = devm_kcalloc(dev, pctrl->ngroups, sizeof(*groups), GFP_KERNEL); if (!groups) return -ENOMEM; @@ -830,7 +830,7 @@ static int zynqmp_pinctrl_prepare_pin_desc(struct device *dev, if (ret) return ret; - pins = devm_kzalloc(dev, sizeof(*pins) * *npins, GFP_KERNEL); + pins = devm_kcalloc(dev, *npins, sizeof(*pins), GFP_KERNEL); if (!pins) return -ENOMEM; |