diff options
| author | Simon Schwartz <kern.simon@theschwartz.xyz> | 2019-12-10 17:41:37 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-24 08:34:47 +0100 |
| commit | dc2edd3023eb4036998a89e02ae2ce039b3dd439 (patch) | |
| tree | a1849fde7b6eb29b1f9b79833adfb1c73bae8a73 /drivers/base | |
| parent | 4ee8f8ecbf5763dd4ab46a671a86963bc7e9abc0 (diff) | |
driver core: platform: Prevent resouce overflow from causing infinite loops
[ Upstream commit 39cc539f90d035a293240c9443af50be55ee81b8 ]
num_resources in the platform_device struct is declared as a u32. The
for loops that iterate over num_resources use an int as the counter,
which can cause infinite loops on architectures with smaller ints.
Change the loop counters to u32.
Signed-off-by: Simon Schwartz <kern.simon@theschwartz.xyz>
Link: https://lore.kernel.org/r/2201ce63a2a171ffd2ed14e867875316efcf71db.camel@theschwartz.xyz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/platform.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c index e9be1f56929a..1d3a50ac2166 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -27,6 +27,7 @@ #include <linux/limits.h> #include <linux/property.h> #include <linux/kmemleak.h> +#include <linux/types.h> #include "base.h" #include "power/power.h" @@ -67,7 +68,7 @@ void __weak arch_setup_pdev_archdata(struct platform_device *pdev) struct resource *platform_get_resource(struct platform_device *dev, unsigned int type, unsigned int num) { - int i; + u32 i; for (i = 0; i < dev->num_resources; i++) { struct resource *r = &dev->resource[i]; @@ -162,7 +163,7 @@ struct resource *platform_get_resource_byname(struct platform_device *dev, unsigned int type, const char *name) { - int i; + u32 i; for (i = 0; i < dev->num_resources; i++) { struct resource *r = &dev->resource[i]; @@ -359,7 +360,8 @@ EXPORT_SYMBOL_GPL(platform_device_add_properties); */ int platform_device_add(struct platform_device *pdev) { - int i, ret; + u32 i; + int ret; if (!pdev) return -EINVAL; @@ -446,7 +448,7 @@ EXPORT_SYMBOL_GPL(platform_device_add); */ void platform_device_del(struct platform_device *pdev) { - int i; + u32 i; if (pdev) { device_remove_properties(&pdev->dev); |