tree e93e3da369be7e9f55d15d02908606a43cecfbb9
parent ed5b43f15a8e86e3ae939b98bc161ee973ecedf2
author Bart Samwel <bart@samwel.tk> 1143198950 -0800
committer Linus Torvalds <torvalds@g5.osdl.org> 1143214400 -0800

[PATCH] Range checking in do_proc_dointvec_(userhz_)jiffies_conv

When (integer) sysctl values are in either seconds or centiseconds, but
represented internally as jiffies, the allowable value range is decreased.
This patch adds range checks to the conversion routines.

For values in seconds: maximum LONG_MAX / HZ.

For values in centiseconds: maximum (LONG_MAX / HZ) * USER_HZ.

(BTW, does anyone else feel that an interface in seconds should not be
accepting negative values?)

Signed-off-by: Bart Samwel <bart@samwel.tk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>