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HOTFIX:Backport Memory corruption due to stack coloring overreach

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Backport of upstream NuttX PR 264

   As discovered by dcabecinhas. This fix assume the 8 byte
   alignment options for size stack size or this will overwrite
   the first word after TOS
   See https://github.com/PX4/Firmware/issues/6613#issuecomment-285869778
This commit is contained in:
David Sidrane
2017-03-11 06:44:39 -10:00
committed by Lorenz Meier
parent 742d0e53f9
commit 5a66539b36
1 changed files with 20 additions and 0 deletions
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nuttx-patches/stack_coloration_overreach_fix.patch
+20
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@@ -0,0 +1,20 @@
diff --git NuttX/nuttx/arch/arm/src/common/up_initialize.c NuttX/nuttx/arch/arm/src/common/up_initialize.c
index a97cd40..b151728 100644
--- NuttX/nuttx/arch/arm/src/common/up_initialize.c
+++ NuttX/nuttx/arch/arm/src/common/up_initialize.c
@@ -100,13 +100,13 @@ static void up_calibratedelay(void)
*
****************************************************************************/
-#if defined(CONFIG_STACK_COLORATION) && CONFIG_ARCH_INTERRUPTSTACK > 3
+#if defined(CONFIG_STACK_COLORATION) && CONFIG_ARCH_INTERRUPTSTACK > 7
static inline void up_color_intstack(void)
{
uint32_t *ptr = (uint32_t *)&g_intstackalloc;
ssize_t size;
- for (size = (CONFIG_ARCH_INTERRUPTSTACK & ~3);
+ for (size = (CONFIG_ARCH_INTERRUPTSTACK & ~7);
size > 0;
size -= sizeof(uint32_t))
{