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ipack: tpci200: fix many double free issues in tpci200_pci_probe

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[ Upstream commit 57a1681095f912239c7fb4d66683ab0425973838 ]

The function tpci200_register called by tpci200_install and
tpci200_unregister called by tpci200_uninstall are in pair. However,
tpci200_unregister has some cleanup operations not in the
tpci200_register. So the error handling code of tpci200_pci_probe has
many different double free issues.

Fix this problem by moving those cleanup operations out of
tpci200_unregister, into tpci200_pci_remove and reverting
the previous commit 9272e5d0028d ("ipack/carriers/tpci200:
Fix a double free in tpci200_pci_probe").

Fixes: 9272e5d0028d ("ipack/carriers/tpci200: Fix a double free in tpci200_pci_probe")
Cc: stable@vger.kernel.org
Reported-by: Dongliang Mu <mudongliangabcd@gmail.com>
Signed-off-by: Dongliang Mu <mudongliangabcd@gmail.com>
Link: https://lore.kernel.org/r/20210810100323.3938492-1-mudongliangabcd@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dongliang Mu 2021-08-10 18:03:18 +08:00 committed by Sasha Levin
parent ff60622b67
commit d2d92bc290
1 changed files with 18 additions and 18 deletions

36
drivers/ipack/carriers/tpci200.c

@ -94,16 +94,13 @@ static void tpci200_unregister(struct tpci200_board *tpci200)
free_irq(tpci200->info->pdev->irq, (void *) tpci200);
pci_iounmap(tpci200->info->pdev, tpci200->info->interface_regs);
pci_iounmap(tpci200->info->pdev, tpci200->info->cfg_regs);
pci_release_region(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR);
pci_release_region(tpci200->info->pdev, TPCI200_IO_ID_INT_SPACES_BAR);
pci_release_region(tpci200->info->pdev, TPCI200_MEM16_SPACE_BAR);
pci_release_region(tpci200->info->pdev, TPCI200_MEM8_SPACE_BAR);
pci_release_region(tpci200->info->pdev, TPCI200_CFG_MEM_BAR);
pci_disable_device(tpci200->info->pdev);
pci_dev_put(tpci200->info->pdev);
}
static void tpci200_enable_irq(struct tpci200_board *tpci200,
@ -524,7 +521,7 @@ static int tpci200_pci_probe(struct pci_dev *pdev,
tpci200->info = kzalloc(sizeof(struct tpci200_infos), GFP_KERNEL);
if (!tpci200->info) {
ret = -ENOMEM;
goto out_err_info;
goto err_tpci200;
}
pci_dev_get(pdev);
@ -535,7 +532,7 @@ static int tpci200_pci_probe(struct pci_dev *pdev,
if (ret) {
dev_err(&pdev->dev, "Failed to allocate PCI Configuration Memory");
ret = -EBUSY;
goto out_err_pci_request;
goto err_tpci200_info;
}
tpci200->info->cfg_regs = ioremap_nocache(
pci_resource_start(pdev, TPCI200_CFG_MEM_BAR),
@ -543,7 +540,7 @@ static int tpci200_pci_probe(struct pci_dev *pdev,
if (!tpci200->info->cfg_regs) {
dev_err(&pdev->dev, "Failed to map PCI Configuration Memory");
ret = -EFAULT;
goto out_err_ioremap;
goto err_request_region;
}
/* Disable byte swapping for 16 bit IP module access. This will ensure
@ -566,7 +563,7 @@ static int tpci200_pci_probe(struct pci_dev *pdev,
if (ret) {
dev_err(&pdev->dev, "error during tpci200 install\n");
ret = -ENODEV;
goto out_err_install;
goto err_cfg_regs;
}
/* Register the carrier in the industry pack bus driver */
@ -578,7 +575,7 @@ static int tpci200_pci_probe(struct pci_dev *pdev,
dev_err(&pdev->dev,
"error registering the carrier on ipack driver\n");
ret = -EFAULT;
goto out_err_bus_register;
goto err_tpci200_install;
}
/* save the bus number given by ipack to logging purpose */
@ -589,19 +586,16 @@ static int tpci200_pci_probe(struct pci_dev *pdev,
tpci200_create_device(tpci200, i);
return 0;
out_err_bus_register:
err_tpci200_install:
tpci200_uninstall(tpci200);
/* tpci200->info->cfg_regs is unmapped in tpci200_uninstall */
tpci200->info->cfg_regs = NULL;
out_err_install:
if (tpci200->info->cfg_regs)
iounmap(tpci200->info->cfg_regs);
out_err_ioremap:
err_cfg_regs:
pci_iounmap(tpci200->info->pdev, tpci200->info->cfg_regs);
err_request_region:
pci_release_region(pdev, TPCI200_CFG_MEM_BAR);
out_err_pci_request:
pci_dev_put(pdev);
err_tpci200_info:
kfree(tpci200->info);
out_err_info:
pci_dev_put(pdev);
err_tpci200:
kfree(tpci200);
return ret;
}
@ -611,6 +605,12 @@ static void __tpci200_pci_remove(struct tpci200_board *tpci200)
ipack_bus_unregister(tpci200->info->ipack_bus);
tpci200_uninstall(tpci200);
pci_iounmap(tpci200->info->pdev, tpci200->info->cfg_regs);
pci_release_region(tpci200->info->pdev, TPCI200_CFG_MEM_BAR);
pci_dev_put(tpci200->info->pdev);
kfree(tpci200->info);
kfree(tpci200);
}