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Code Issues Releases Wiki Activity

pds_core: fix mutex double unlock in error path 

Fix a double unlock in an error handling path by unlocking as soon as
the error is seen and removing unlocks in the error cleanup path.

Link: https://lore.kernel.org/kernel-janitors/209a09f6-5ec6-40c7-a5ec-6260d8f54d25@kili.mountain/
Fixes: 523847df1b ("pds_core: add devcmd device interfaces")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shannon Nelson 2023-05-04 13:44:59 -07:00 committed by David S. Miller
parent 1a30449508
commit 1e76f42779
1 changed files with 13 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/net/ethernet/amd/pds_core/main.c
View File

@ -244,11 +244,16 @@ static int pdsc_init_pf(struct pdsc *pdsc)
set_bit(PDSC_S_FW_DEAD, &pdsc->state);
err = pdsc_setup(pdsc, PDSC_SETUP_INIT);
if (err)
if (err) {
mutex_unlock(&pdsc->config_lock);
goto err_out_unmap_bars;
}
err = pdsc_start(pdsc);
if (err)
if (err) {
mutex_unlock(&pdsc->config_lock);
goto err_out_teardown;
}
mutex_unlock(&pdsc->config_lock);
@ -257,13 +262,15 @@ static int pdsc_init_pf(struct pdsc *pdsc)
err = devl_params_register(dl, pdsc_dl_params,
ARRAY_SIZE(pdsc_dl_params));
if (err) {
devl_unlock(dl);
dev_warn(pdsc->dev, "Failed to register devlink params: %pe\n",
ERR_PTR(err));
goto err_out_unlock_dl;
goto err_out_stop;
}
hr = devl_health_reporter_create(dl, &pdsc_fw_reporter_ops, 0, pdsc);
if (IS_ERR(hr)) {
devl_unlock(dl);
dev_warn(pdsc->dev, "Failed to create fw reporter: %pe\n", hr);
err = PTR_ERR(hr);
goto err_out_unreg_params;
@ -279,15 +286,13 @@ static int pdsc_init_pf(struct pdsc *pdsc)
return 0;
err_out_unreg_params:
devl_params_unregister(dl, pdsc_dl_params,
ARRAY_SIZE(pdsc_dl_params));
err_out_unlock_dl:
devl_unlock(dl);
devlink_params_unregister(dl, pdsc_dl_params,
ARRAY_SIZE(pdsc_dl_params));
err_out_stop:
pdsc_stop(pdsc);
err_out_teardown:
pdsc_teardown(pdsc, PDSC_TEARDOWN_REMOVING);
err_out_unmap_bars:
mutex_unlock(&pdsc->config_lock);
del_timer_sync(&pdsc->wdtimer);
if (pdsc->wq)
destroy_workqueue(pdsc->wq);