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library: protect against large version numbers.

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Linux release numbers are x.y.z we assumed but never protected
against x> 0x7fff and y,z > 0xff before.

Linux release in 1991, 1 major release per 6 years so we're fine
until 7452, unless they do way too many minor rels (max being 39)
This commit is contained in:
Craig Small
2016-05-01 17:14:48 +10:00
parent 6b5cb345c5
commit 9abf7d879d
2 changed files with 11 additions and 2 deletions
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2
proc/version.h
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@ -29,7 +29,7 @@ __BEGIN_DECLS
int procps_linux_version(void);
/* Convenience macros for composing/decomposing version codes */
#define LINUX_VERSION(x,y,z) (0x10000*(x) + 0x100*(y) + z)
#define LINUX_VERSION(x,y,z) (0x10000*((x)&0x7fff) + 0x100*((y)&0xff) + (z)&0xff)
#define LINUX_VERSION_MAJOR(x) (((x)>>16) & 0xFF)
#define LINUX_VERSION_MINOR(x) (((x)>> 8) & 0xFF)
#define LINUX_VERSION_PATCH(x) ( (x) & 0xFF)