| From | Greg Kroah-Hartman <> | Subject | [PATCH 020/190] Revert "PCI: Fix pci_create_slot() reference count leak" | Date | Wed, 21 Apr 2021 14:58:15 +0200 |
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This reverts commit 8a94644b440eef5a7b9c104ac8aa7a7f413e35e5.
Commits from @umn.edu addresses have been found to be submitted in "bad faith" to try to test the kernel community's ability to review "known malicious" changes. The result of these submissions can be found in a paper published at the 42nd IEEE Symposium on Security and Privacy entitled, "Open Source Insecurity: Stealthily Introducing Vulnerabilities via Hypocrite Commits" written by Qiushi Wu (University of Minnesota) and Kangjie Lu (University of Minnesota).
Because of this, all submissions from this group must be reverted from the kernel tree and will need to be re-reviewed again to determine if they actually are a valid fix. Until that work is complete, remove this change to ensure that no problems are being introduced into the codebase.
Cc: https Cc: Qiushi Wu <wu000273@umn.edu> Cc: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/pci/slot.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/pci/slot.c b/drivers/pci/slot.c index d627dd9179b4..c190e09af356 100644 --- a/drivers/pci/slot.c +++ b/drivers/pci/slot.c @@ -268,7 +268,6 @@ struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr, slot_name = make_slot_name(name); if (!slot_name) { err = -ENOMEM; - kfree(slot); goto err; } @@ -277,10 +276,8 @@ struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr, err = kobject_init_and_add(&slot->kobj, &pci_slot_ktype, NULL, "%s", slot_name); - if (err) { - kobject_put(&slot->kobj); + if (err) goto err; - } down_read(&pci_bus_sem); list_for_each_entry(dev, &parent->devices, bus_list) @@ -296,6 +293,7 @@ struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr, mutex_unlock(&pci_slot_mutex); return slot; err: + kfree(slot); slot = ERR_PTR(err); goto out; } -- 2.31.1
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