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authorHeinrich Schuchardt <xypron.glpk@gmx.de>2015-04-16 12:48:07 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-17 09:04:08 -0400
commit230633d109e35b0a24277498e773edeb79b4a331 (patch)
treea9619a1bca9f70f5fb0f87b47bdb5493a6e72a8f /kernel/gcov
parent534b483a86e6b96f1b5cc03bbe4b696f3daead6d (diff)
downloadlinux-230633d109e35b0a24277498e773edeb79b4a331.tar.bz2
kernel/sysctl.c: detect overflows when converting to int
When converting unsigned long to int overflows may occur. These currently are not detected when writing to the sysctl file system. E.g. on a system where int has 32 bits and long has 64 bits echo 0x800001234 > /proc/sys/kernel/threads-max has the same effect as echo 0x1234 > /proc/sys/kernel/threads-max The patch adds the missing check in do_proc_dointvec_conv. With the patch an overflow will result in an error EINVAL when writing to the the sysctl file system. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/gcov')
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