path: root/net
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authorTejun Heo <tj@kernel.org>2008-10-13 18:45:20 -0500
committerEric Van Hensbergen <ericvh@gmail.com>2008-10-17 11:04:42 -0500
commit95820a36516d12dcb49d066dd3d5b187a2557612 (patch)
tree84ba5869e9f68b3c943e75feb7c634da1c61f47a /net
parent91b8534fa8f5e01f249b1bf8df0a2540053549ad (diff)
9p: drop broken unused error path from p9_conn_create()
Post p9_fd_poll() error path which checks m->poll_waddr[i] for PTR_ERR value has the following problems. * It's completely unused. Error value is set iff NULL @wait_address has been specified to p9_pollwait() which is guaranteed not to happen. * It dereferences @m after deallocating it (introduced by 571ffeaf and spotted by Raja R Harinath. * It returned the wrong value on error. It should return poll_waddr[i] but it returnes poll_waddr (introduced by 571ffeaf). * p9_mux_poll_stop() doesn't handle PTR_ERR value. It will try to operate on the PTR_ERR value as if it's a normal pointer and cause oops. As the error path is bogus in the first place, there's no reason to hold onto it. Kill it. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com> Cc: Raja R Harinath <harinath@hurrynot.org>
Diffstat (limited to 'net')
1 files changed, 1 insertions, 16 deletions
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index 6bfc013f8b6f..c07f2ab8d0f7 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -540,12 +540,6 @@ p9_pollwait(struct file *filp, wait_queue_head_t *wait_address, poll_table *p)
- if (!wait_address) {
- P9_DPRINTK(P9_DEBUG_ERROR, "no wait_address\n");
- pwait->wait_addr = ERR_PTR(-EIO);
- return;
- }
pwait->conn = m;
pwait->wait_addr = wait_address;
init_waitqueue_func_entry(&pwait->wait, p9_pollwake);
@@ -561,7 +555,7 @@ p9_pollwait(struct file *filp, wait_queue_head_t *wait_address, poll_table *p)
static struct p9_conn *p9_conn_create(struct p9_client *client)
- int i, n;
+ int n;
struct p9_conn *m;
P9_DPRINTK(P9_DEBUG_MUX, "client %p msize %d\n", client, client->msize);
@@ -590,15 +584,6 @@ static struct p9_conn *p9_conn_create(struct p9_client *client)
set_bit(Wpending, &m->wsched);
- for (i = 0; i < ARRAY_SIZE(m->poll_wait); i++) {
- if (IS_ERR(m->poll_wait[i].wait_addr)) {
- p9_mux_poll_stop(m);
- kfree(m);
- /* return the error code */
- return (void *)m->poll_wait[i].wait_addr;
- }
- }
return m;

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