When kvasprintf() fails to allocate memory, it would return
null-pointer. In case of null pointer dereferencing, fix it
by returning error number directly from the function.
Fixes: 704e8953d3e9 ("PCI/irq: Add pci_request_irq() and pci_free_irq() helpers")
Signed-off-by: Zeng Heng <zengheng4@xxxxxxxxxx>
---
drivers/pci/irq.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/pci/irq.c b/drivers/pci/irq.c
index 12ecd0aaa28d..0050e8f6814e 100644
--- a/drivers/pci/irq.c
+++ b/drivers/pci/irq.c
@@ -44,6 +44,8 @@ int pci_request_irq(struct pci_dev *dev, unsigned int nr, irq_handler_t handler,
va_start(ap, fmt);
devname = kvasprintf(GFP_KERNEL, fmt, ap);
va_end(ap);
+ if (!devname)
+ return -ENOMEM;
ret = request_threaded_irq(pci_irq_vector(dev, nr), handler, thread_fn,
irqflags, devname, dev_id);
--
2.25.1
