diff options
| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2021-05-09 09:13:03 +0200 |
|---|---|---|
| committer | Denys Drozdov <denys.drozdov@toradex.com> | 2021-07-15 13:53:55 +0300 |
| commit | 9de230a4a787b9f7d0eb3fe7771e0d5b17cf2519 (patch) | |
| tree | ba6500f9d14fb14f5187853dae8513101d4f524d /drivers/uio | |
| parent | 27608b7fa96099f10384095333a5d4f629f53d80 (diff) | |
uio_hv_generic: Fix a memory leak in error handling paths
commit 3ee098f96b8b6c1a98f7f97915f8873164e6af9d upstream.
If 'vmbus_establish_gpadl()' fails, the (recv|send)_gpadl will not be
updated and 'hv_uio_cleanup()' in the error handling path will not be
able to free the corresponding buffer.
In such a case, we need to free the buffer explicitly.
Fixes: cdfa835c6e5e ("uio_hv_generic: defer opening vmbus until first use")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/4fdaff557deef6f0475d02ba7922ddbaa1ab08a6.1620544055.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/uio')
| -rw-r--r-- | drivers/uio/uio_hv_generic.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c index 3c5169eb23f5..bdf3932ee3f2 100644 --- a/drivers/uio/uio_hv_generic.c +++ b/drivers/uio/uio_hv_generic.c @@ -296,8 +296,10 @@ hv_uio_probe(struct hv_device *dev, ret = vmbus_establish_gpadl(channel, pdata->recv_buf, RECV_BUFFER_SIZE, &pdata->recv_gpadl); - if (ret) + if (ret) { + vfree(pdata->recv_buf); goto fail_close; + } /* put Global Physical Address Label in name */ snprintf(pdata->recv_name, sizeof(pdata->recv_name), @@ -316,8 +318,10 @@ hv_uio_probe(struct hv_device *dev, ret = vmbus_establish_gpadl(channel, pdata->send_buf, SEND_BUFFER_SIZE, &pdata->send_gpadl); - if (ret) + if (ret) { + vfree(pdata->send_buf); goto fail_close; + } snprintf(pdata->send_name, sizeof(pdata->send_name), "send:%u", pdata->send_gpadl); |