kernel/linux-2.6.29-sparc-IOC_TYPECHECK.patch

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2010-07-29 23:46:31 +00:00
diff -up vanilla-2.6.29-rc7-git2/arch/sparc/include/asm/ioctl.h.BAD vanilla-2.6.29-rc7-git2/arch/sparc/include/asm/ioctl.h
--- vanilla-2.6.29-rc7-git2/arch/sparc/include/asm/ioctl.h.BAD 2009-03-09 17:01:32.000000000 -0400
+++ vanilla-2.6.29-rc7-git2/arch/sparc/include/asm/ioctl.h 2009-03-09 16:52:27.000000000 -0400
@@ -41,6 +41,17 @@
((nr) << _IOC_NRSHIFT) | \
((size) << _IOC_SIZESHIFT))
+#ifdef __KERNEL__
+/* provoke compile error for invalid uses of size argument */
+extern unsigned int __invalid_size_argument_for_IOC;
+#define _IOC_TYPECHECK(t) \
+ ((sizeof(t) == sizeof(t[1]) && \
+ sizeof(t) < (1 << _IOC_SIZEBITS)) ? \
+ sizeof(t) : __invalid_size_argument_for_IOC)
+#else
+#define _IOC_TYPECHECK(t) (sizeof(t))
+#endif
+
#define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0)
#define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size))
#define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size))