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idpf: fix memleak in vport interrupt configuration

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The initialization of vport interrupt consists of two functions:
 1) idpf_vport_intr_init() where a generic configuration is done
 2) idpf_vport_intr_req_irq() where the irq for each q_vector is
   requested.

The first function used to create a base name for each interrupt using
"kasprintf()" call. Unfortunately, although that call allocated memory
for a text buffer, that memory was never released.

Fix this by removing creating the interrupt base name in 1).
Instead, always create a full interrupt name in the function 2), because
there is no need to create a base name separately, considering that the
function 2) is never called out of idpf_vport_intr_init() context.

Fixes: d4d5587182 ("idpf: initialize interrupts and enable vport")
Cc: stable@vger.kernel.org # 6.7
Signed-off-by: Michal Kubiak <michal.kubiak@intel.com>
Reviewed-by: Pavan Kumar Linga <pavan.kumar.linga@intel.com>
Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Link: https://patch.msgid.link/20240806220923.3359860-3-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Michal Kubiak 2024-08-06 15:09:21 -07:00 committed by Jakub Kicinski
parent f01032a2ca
commit 3cc88e8405
1 changed files with 8 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/net/ethernet/intel/idpf/idpf_txrx.c
View File

@ -3780,13 +3780,15 @@ void idpf_vport_intr_update_itr_ena_irq(struct idpf_q_vector *q_vector)
/**
* idpf_vport_intr_req_irq - get MSI-X vectors from the OS for the vport
* @vport: main vport structure
* @basename: name for the vector
*/
static int idpf_vport_intr_req_irq(struct idpf_vport *vport, char *basename)
static int idpf_vport_intr_req_irq(struct idpf_vport *vport)
{
struct idpf_adapter *adapter = vport->adapter;
const char *drv_name, *if_name, *vec_name;
int vector, err, irq_num, vidx;
const char *vec_name;
drv_name = dev_driver_string(&adapter->pdev->dev);
if_name = netdev_name(vport->netdev);
for (vector = 0; vector < vport->num_q_vectors; vector++) {
struct idpf_q_vector *q_vector = &vport->q_vectors[vector];
@ -3804,8 +3806,8 @@ static int idpf_vport_intr_req_irq(struct idpf_vport *vport, char *basename)
else
continue;
name = kasprintf(GFP_KERNEL, "%s-%s-%d", basename, vec_name,
vidx);
name = kasprintf(GFP_KERNEL, "%s-%s-%s-%d", drv_name, if_name,
vec_name, vidx);
err = request_irq(irq_num, idpf_vport_intr_clean_queues, 0,
name, q_vector);
@ -4326,7 +4328,6 @@ int idpf_vport_intr_alloc(struct idpf_vport *vport)
*/
int idpf_vport_intr_init(struct idpf_vport *vport)
{
char *int_name;
int err;
err = idpf_vport_intr_init_vec_idx(vport);
@ -4340,11 +4341,7 @@ int idpf_vport_intr_init(struct idpf_vport *vport)
if (err)
goto unroll_vectors_alloc;
int_name = kasprintf(GFP_KERNEL, "%s-%s",
dev_driver_string(&vport->adapter->pdev->dev),
vport->netdev->name);
err = idpf_vport_intr_req_irq(vport, int_name);
err = idpf_vport_intr_req_irq(vport);
if (err)
goto unroll_vectors_alloc;