From: Dan Carpenter dan.carpenter@oracle.com
stable inclusion from stable-5.10.68 commit f10f727cf9f452909be535a4e2db51baca7dff41 bugzilla: 182671 https://gitee.com/openeuler/kernel/issues/I4EWUH
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ 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@oracle.com Signed-off-by: Bjorn Helgaas bhelgaas@google.com Reviewed-by: Logan Gunthorpe logang@deltatee.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com
Signed-off-by: Chen Jun chenjun102@huawei.com --- drivers/pci/pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
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;