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Subject[PATCH] PCI: endpoint: Fix use after free in pci_epf_remove_cfs()
Date
All of entries are freed in a loop, however, the freed entry is accessed
by list_del() after the loop.

Fixes: ef1433f ("PCI: endpoint: Create configfs entry for each pci_epf_device_id table entry")
Signed-off-by: Shunsuke Mie <mie@igel.co.jp>
---
drivers/pci/endpoint/pci-epf-core.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c
index e9289d10f822..538e902b0ba6 100644
--- a/drivers/pci/endpoint/pci-epf-core.c
+++ b/drivers/pci/endpoint/pci-epf-core.c
@@ -202,8 +202,10 @@ static void pci_epf_remove_cfs(struct pci_epf_driver *driver)
return;

mutex_lock(&pci_epf_mutex);
- list_for_each_entry_safe(group, tmp, &driver->epf_group, group_entry)
+ list_for_each_entry_safe(group, tmp, &driver->epf_group, group_entry) {
+ list_del(&group->group_entry);
pci_ep_cfs_remove_epf_group(group);
+ }
list_del(&driver->epf_group);
mutex_unlock(&pci_epf_mutex);
}
--
2.17.1
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