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use clamp_t in UNAME26 fix

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commit 31fd84b95e upstream.

The min/max call needed to have explicit types on some architectures
(e.g. mn10300). Use clamp_t instead to avoid the warning:

  kernel/sys.c: In function 'override_release':
  kernel/sys.c:1287:10: warning: comparison of distinct pointer types lacks a cast [enabled by default]

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kees Cook 2012-10-19 18:45:53 -07:00 committed by Greg Kroah-Hartman
parent 643fde8ed4
commit 3680030e97
1 changed files with 1 additions and 1 deletions
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2
kernel/sys.c
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@ -1199,7 +1199,7 @@ static int override_release(char __user *release, size_t len)
rest++;
}
v = ((LINUX_VERSION_CODE >> 8) & 0xff) + 40;
copy = min(sizeof(buf), max_t(size_t, 1, len));
copy = clamp_t(size_t, len, 1, sizeof(buf));
copy = scnprintf(buf, copy, "2.6.%u%s", v, rest);
ret = copy_to_user(release, buf, copy + 1);
}