| Message ID | 20230209010748.45454-1-jiasheng@iscas.ac.cn |
|---|---|
| State | New |
| Headers | show |
| Series | [1/2,v2] iwl4965: Add missing check for create_singlethread_workqueue | expand |
Jiasheng Jiang <jiasheng@iscas.ac.cn> wrote: > Add the check for the return value of the create_singlethread_workqueue > in order to avoid NULL pointer dereference. > > Fixes: b481de9ca074 ("[IWLWIFI]: add iwlwifi wireless drivers") > Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> > Acked-by: Stanislaw Gruszka <stf_xl@wp.pl> A tip for future submissions, when you submit a new version please submit all patches from the patchset as v2. It's difficult to pick patches with different versions.
Jiasheng Jiang <jiasheng@iscas.ac.cn> wrote: > Add the check for the return value of the create_singlethread_workqueue() > in order to avoid NULL pointer dereference. > > Fixes: b481de9ca074 ("[IWLWIFI]: add iwlwifi wireless drivers") > Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> > Acked-by: Stanislaw Gruszka <stf_xl@wp.pl> Patch applied to wireless-next.git, thanks. 26e6775f7551 wifi: iwl4965: Add missing check for create_singlethread_workqueue()
diff --git a/drivers/net/wireless/intel/iwlegacy/4965-mac.c b/drivers/net/wireless/intel/iwlegacy/4965-mac.c index 721b4042b4bf..4d3c544ff2e6 100644 --- a/drivers/net/wireless/intel/iwlegacy/4965-mac.c +++ b/drivers/net/wireless/intel/iwlegacy/4965-mac.c @@ -6211,10 +6211,12 @@ il4965_bg_txpower_work(struct work_struct *work) mutex_unlock(&il->mutex); } -static void +static int il4965_setup_deferred_work(struct il_priv *il) { il->workqueue = create_singlethread_workqueue(DRV_NAME); + if (!il->workqueue) + return -ENOMEM; init_waitqueue_head(&il->wait_command_queue); @@ -6233,6 +6235,8 @@ il4965_setup_deferred_work(struct il_priv *il) timer_setup(&il->watchdog, il_bg_watchdog, 0); tasklet_setup(&il->irq_tasklet, il4965_irq_tasklet); + + return 0; } static void @@ -6618,7 +6622,10 @@ il4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) goto out_disable_msi; } - il4965_setup_deferred_work(il); + err = il4965_setup_deferred_work(il); + if (err) + goto out_free_irq; + il4965_setup_handlers(il); /********************************************* @@ -6656,6 +6663,7 @@ il4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) out_destroy_workqueue: destroy_workqueue(il->workqueue); il->workqueue = NULL; +out_free_irq: free_irq(il->pci_dev->irq, il); out_disable_msi: pci_disable_msi(il->pci_dev);
Add the check for the return value of the create_singlethread_workqueue in order to avoid NULL pointer dereference. Fixes: b481de9ca074 ("[IWLWIFI]: add iwlwifi wireless drivers") Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> Acked-by: Stanislaw Gruszka <stf_xl@wp.pl> --- Changelog: v1 -> v2: 1. Remove redundant "{}". --- drivers/net/wireless/intel/iwlegacy/4965-mac.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)