This is a note to let you know that I've just added the patch titled
PCI: Fix pci_dev_str_match_path() alloc while atomic bug
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pci-fix-pci_dev_str_match_path-alloc-while-atomic-bu.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 03b8e430bbeee38980f154936b4410b1e5f9cf12
Author: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date: Thu Aug 12 10:00:04 2021 +0300
PCI: Fix pci_dev_str_match_path() alloc while atomic bug
[ Upstream commit 7eb6ea4148579b85540a41d57bcec315b8af8ff8 ]
pci_dev_str_match_path() is often called with a spinlock held so the
allocation has to be atomic. The call tree is:
pci_specified_resource_alignment() <-- takes spin_lock();
pci_dev_str_match()
pci_dev_str_match_path()
Fixes: 45db33709ccc ("PCI: Allow specifying devices using a base bus and path of devfns")
Link: https://lore.kernel.org/r/20210812070004.GC31863@kili
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Reviewed-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index eae6a9fdd33d..0d7109018a91 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -265,7 +265,7 @@ static int pci_dev_str_match_path(struct pci_dev *dev, const char *path,
*endptr = strchrnul(path, ';');
- wpath = kmemdup_nul(path, *endptr - path, GFP_KERNEL);
+ wpath = kmemdup_nul(path, *endptr - path, GFP_ATOMIC);
if (!wpath)
return -ENOMEM;
