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PCI: Check for alloc failure in pci_request_irq()
[ Upstream commit2d9cd957d4
] When kvasprintf() fails to allocate memory, it returns a NULL pointer. Return error from pci_request_irq() so we don't dereference it. [bhelgaas: commit log] Fixes:704e8953d3
("PCI/irq: Add pci_request_irq() and pci_free_irq() helpers") Link: https://lore.kernel.org/r/20221121020029.3759444-1-zengheng4@huawei.com Signed-off-by: Zeng Heng <zengheng4@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -94,6 +94,8 @@ int pci_request_irq(struct pci_dev *dev, unsigned int nr, irq_handler_t handler,
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va_start(ap, fmt);
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devname = kvasprintf(GFP_KERNEL, fmt, ap);
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va_end(ap);
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if (!devname)
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return -ENOMEM;
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ret = request_threaded_irq(pci_irq_vector(dev, nr), handler, thread_fn,
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irqflags, devname, dev_id);
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