From 39cc539f90d035a293240c9443af50be55ee81b8 Mon Sep 17 00:00:00 2001 From: Simon Schwartz Date: Tue, 10 Dec 2019 17:41:37 -0500 Subject: [PATCH] driver core: platform: Prevent resouce overflow from causing infinite loops 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 Link: https://lore.kernel.org/r/2201ce63a2a171ffd2ed14e867875316efcf71db.camel@theschwartz.xyz Signed-off-by: Greg Kroah-Hartman --- drivers/base/platform.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/base/platform.c b/drivers/base/platform.c index cf6b6b7..864b53b 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -27,6 +27,7 @@ #include #include #include +#include #include "base.h" #include "power/power.h" @@ -48,7 +49,7 @@ EXPORT_SYMBOL_GPL(platform_bus); 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]; @@ -255,7 +256,7 @@ 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]; @@ -501,7 +502,8 @@ 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; @@ -590,7 +592,7 @@ EXPORT_SYMBOL_GPL(platform_device_add); */ void platform_device_del(struct platform_device *pdev) { - int i; + u32 i; if (!IS_ERR_OR_NULL(pdev)) { device_del(&pdev->dev); -- 2.7.4