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authorAl Viro <viro@zeniv.linux.org.uk>2012-11-16 20:48:13 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2012-11-16 20:49:06 -0500
commit85910c202bb869edd2bb9a6c217a658c83f06f1e (patch)
treefcf4bf1ba2ebfcb6dec395a10ed6b33e7d33217e /kernel/sys.c
parentf7200d4c504a385b1b70f3bab379f99745f7ef6a (diff)
parent517ffce4e1a03aea979fe3a18a3dd1761a24fafb (diff)
downloadolio-linux-3.10-85910c202bb869edd2bb9a6c217a658c83f06f1e.tar.xz
olio-linux-3.10-85910c202bb869edd2bb9a6c217a658c83f06f1e.zip
Merge commit '517ffce4e1a03aea979fe3a18a3dd1761a24fafb' into arch-sparc
Backmerge from the point in mainline where a trivial conflict had been introduced (arch/sparc/kernel/sys_sparc_64.c had grown sys_kern_features() right after where kernel_execve() used to be) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/sys.c')
-rw-r--r--kernel/sys.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/kernel/sys.c b/kernel/sys.c
index c5cb5b99cb8..e6e0ece5f6a 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1265,15 +1265,16 @@ 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
*/
-static int override_release(char __user *release, int len)
+static int override_release(char __user *release, size_t len)
{
int ret = 0;
- char buf[65];
if (current->personality & UNAME26) {
- char *rest = UTS_RELEASE;
+ const char *rest = UTS_RELEASE;
+ char buf[65] = { 0 };
int ndots = 0;
unsigned v;
+ size_t copy;
while (*rest) {
if (*rest == '.' && ++ndots >= 3)
@@ -1283,8 +1284,9 @@ static int override_release(char __user *release, int len)
rest++;
}
v = ((LINUX_VERSION_CODE >> 8) & 0xff) + 40;
- snprintf(buf, len, "2.6.%u%s", v, rest);
- ret = copy_to_user(release, buf, 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);
}
return ret;
}