This is a note to let you know that I've just added the patch titled

uio_hv_generic: Fix another memory leak in error handling paths

to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 0b0226be3a52dadd965644bc52a807961c2c26df Mon Sep 17 00:00:00 2001

From: Christophe JAILLET christophe.jaillet@wanadoo.fr Date: Sun, 9 May 2021 09:13:12 +0200 Subject: uio_hv_generic: Fix another memory leak in error handling paths

Memory allocated by 'vmbus_alloc_ring()' at the beginning of the probe function is never freed in the error handling path.

Add the missing 'vmbus_free_ring()' call.

Note that it is already freed in the .remove function.

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/0d86027b8eeed8e6360bc3d52bcdb328ff9bdca1.162054405... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/uio/uio_hv_generic.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c index eebc399f2cc7..652fe2547587 100644 --- a/drivers/uio/uio_hv_generic.c +++ b/drivers/uio/uio_hv_generic.c @@ -291,7 +291,7 @@ hv_uio_probe(struct hv_device *dev, pdata->recv_buf = vzalloc(RECV_BUFFER_SIZE); if (pdata->recv_buf == NULL) { ret = -ENOMEM; - goto fail_close; + goto fail_free_ring; }

ret = vmbus_establish_gpadl(channel, pdata->recv_buf, @@ -351,6 +351,8 @@ hv_uio_probe(struct hv_device *dev,

fail_close: hv_uio_cleanup(dev, pdata); +fail_free_ring: + vmbus_free_ring(dev->channel);

return ret; }