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| author | Li Zefan <lizf@cn.fujitsu.com> | 2008-07-29 22:33:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-30 09:41:44 -0700 |
| commit | 5a3eb9f6b7c598529f832b8baa6458ab1cbab2c6 (patch) | |
| tree | 16d1d481e86fb222e4e18c0681c1e5a4710675fb /kernel | |
| parent | 1d1958f05095a7e9ecbba86235122784a3d1b561 (diff) | |
| download | lwn-5a3eb9f6b7c598529f832b8baa6458ab1cbab2c6.tar.gz lwn-5a3eb9f6b7c598529f832b8baa6458ab1cbab2c6.zip | |
cgroup: fix possible memory leak
There's a leak if copy_from_user() returns failure.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Paul Menage <menage@google.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/cgroup.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 657f8f8d93a5..28debe4e1488 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -1424,14 +1424,17 @@ static ssize_t cgroup_write_string(struct cgroup *cgrp, struct cftype *cft, if (buffer == NULL) return -ENOMEM; } - if (nbytes && copy_from_user(buffer, userbuf, nbytes)) - return -EFAULT; + if (nbytes && copy_from_user(buffer, userbuf, nbytes)) { + retval = -EFAULT; + goto out; + } buffer[nbytes] = 0; /* nul-terminate */ strstrip(buffer); retval = cft->write_string(cgrp, cft, buffer); if (!retval) retval = nbytes; +out: if (buffer != local_buffer) kfree(buffer); return retval; |