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author | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2015-04-16 12:48:07 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-17 09:04:08 -0400 |
commit | 230633d109e35b0a24277498e773edeb79b4a331 (patch) | |
tree | a9619a1bca9f70f5fb0f87b47bdb5493a6e72a8f /kernel/gcov | |
parent | 534b483a86e6b96f1b5cc03bbe4b696f3daead6d (diff) | |
download | op-kernel-dev-230633d109e35b0a24277498e773edeb79b4a331.zip op-kernel-dev-230633d109e35b0a24277498e773edeb79b4a331.tar.gz |
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')
0 files changed, 0 insertions, 0 deletions