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kernel/sys.c: fix UNAME26 for 4.0 

There's a uname workaround for broken userspace which can't handle kernel
versions of 3.x.  Update it for 4.x.

Signed-off-by: Jon DeVree <nuxi@vault24.org>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jon DeVree 2015-02-27 15:52:07 -08:00 committed by Linus Torvalds
parent d2973697b3
commit 39afb5ee46
1 changed files with 2 additions and 1 deletions
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3
kernel/sys.c
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@ -1108,6 +1108,7 @@ DECLARE_RWSEM(uts_sem);
/*
* Work around broken programs that cannot handle "Linux 3.0".
* Instead we map 3.x to 2.6.40+x, so e.g. 3.0 would be 2.6.40
* And we map 4.x to 2.6.60+x, so 4.0 would be 2.6.60.
*/
static int override_release(char __user *release, size_t len)
{
@ -1127,7 +1128,7 @@ static int override_release(char __user *release, size_t len)
break;
rest++;
}
v = ((LINUX_VERSION_CODE >> 8) & 0xff) + 40;
v = ((LINUX_VERSION_CODE >> 8) & 0xff) + 60;
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);