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misc: microchip: pci1xxxx: fix double free in the error handling of gp_aux_bus_probe()

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commit 086c6cbcc5 upstream.

When auxiliary_device_add() returns error and then calls
auxiliary_device_uninit(), callback function
gp_auxiliary_device_release() calls ida_free() and
kfree(aux_device_wrapper) to free memory. We should't
call them again in the error handling path.

Fix this by skipping the redundant cleanup functions.

Fixes: 393fc2f594 ("misc: microchip: pci1xxxx: load auxiliary bus driver for the PIO function in the multi-function endpoint of pci1xxxx device.")
Signed-off-by: Yongzhi Liu <hyperlyzcs@gmail.com>
Link: https://lore.kernel.org/r/20240523121434.21855-3-hyperlyzcs@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yongzhi Liu 2024-05-23 20:14:33 +08:00 committed by Greg Kroah-Hartman
parent 8b65eaeae8
commit 1efe551982
1 changed files with 3 additions and 0 deletions
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3
drivers/misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.c
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@ -111,6 +111,7 @@ static int gp_aux_bus_probe(struct pci_dev *pdev, const struct pci_device_id *id
err_aux_dev_add_1:
auxiliary_device_uninit(&aux_bus->aux_device_wrapper[1]->aux_dev);
goto err_aux_dev_add_0;
err_aux_dev_init_1:
ida_free(&gp_client_ida, aux_bus->aux_device_wrapper[1]->aux_dev.id);
@ -120,6 +121,7 @@ static int gp_aux_bus_probe(struct pci_dev *pdev, const struct pci_device_id *id
err_aux_dev_add_0:
auxiliary_device_uninit(&aux_bus->aux_device_wrapper[0]->aux_dev);
goto err_ret;
err_aux_dev_init_0:
ida_free(&gp_client_ida, aux_bus->aux_device_wrapper[0]->aux_dev.id);
@ -127,6 +129,7 @@ static int gp_aux_bus_probe(struct pci_dev *pdev, const struct pci_device_id *id
err_ida_alloc_0:
kfree(aux_bus->aux_device_wrapper[0]);
err_ret:
return retval;
}