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| author | Eric Van Hensbergen <ericvh@ericvh-desktop.austin.ibm.com> | 2007-07-26 14:04:54 -0500 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@ericvh-laptop.austin.ibm.com> | 2007-08-23 10:12:48 -0500 |
| commit | 1a3cac6c6d1f56dc26939eb41be29844f897c15a (patch) | |
| tree | 02922961c01db29922737f37796265103e96dc6b | |
| parent | 8eb891fc809b2300137bcd247025628c06c95a63 (diff) | |
| download | linux-stable-1a3cac6c6d1f56dc26939eb41be29844f897c15a.tar.gz linux-stable-1a3cac6c6d1f56dc26939eb41be29844f897c15a.tar.bz2 linux-stable-1a3cac6c6d1f56dc26939eb41be29844f897c15a.zip | |
9p: fix use after free
On 7/22/07, Adrian Bunk <bunk@stusta.de> wrote:
The Coverity checker spotted the following use-after-free
in net/9p/mux.c:
<-- snip -->
...
struct p9_conn *p9_conn_create(struct p9_transport *trans, int msize,
unsigned char *extended)
{
...
if (!m->tagpool) {
kfree(m);
return ERR_PTR(PTR_ERR(m->tagpool));
}
...
<-- snip -->
Also spotted was a leak of the same structure further down in the function.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| -rw-r--r-- | net/9p/mux.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/net/9p/mux.c b/net/9p/mux.c index acb038810f39..5d70558c4c61 100644 --- a/net/9p/mux.c +++ b/net/9p/mux.c @@ -288,9 +288,10 @@ struct p9_conn *p9_conn_create(struct p9_transport *trans, int msize, m->extended = extended; m->trans = trans; m->tagpool = p9_idpool_create(); - if (!m->tagpool) { + if (IS_ERR(m->tagpool)) { + mtmp = ERR_PTR(-ENOMEM); kfree(m); - return ERR_PTR(PTR_ERR(m->tagpool)); + return mtmp; } m->err = 0; @@ -308,8 +309,10 @@ struct p9_conn *p9_conn_create(struct p9_transport *trans, int msize, memset(&m->poll_waddr, 0, sizeof(m->poll_waddr)); m->poll_task = NULL; n = p9_mux_poll_start(m); - if (n) + if (n) { + kfree(m); return ERR_PTR(n); + } n = trans->poll(trans, &m->pt); if (n & POLLIN) { |