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| author | Zeng Heng <zengheng4@huawei.com> | 2022-11-21 10:00:29 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-18 11:30:21 +0100 |
| commit | 5427d904e314809065a2a1064816a054da035f06 (patch) | |
| tree | 3978730fe1d2a79c2ab4df6301bf694a48e1cd16 /drivers | |
| parent | 4a8087d0cc09f56f8bea7d10de1b895b4cec4bad (diff) | |
| download | linux-stable-5427d904e314809065a2a1064816a054da035f06.tar.gz linux-stable-5427d904e314809065a2a1064816a054da035f06.tar.bz2 linux-stable-5427d904e314809065a2a1064816a054da035f06.zip | |
PCI: Check for alloc failure in pci_request_irq()
[ Upstream commit 2d9cd957d40c3ac491b358e7cff0515bb07a3a9c ]
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: 704e8953d3e9 ("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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pci/irq.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/pci/irq.c b/drivers/pci/irq.c index a1de501a2729..3f6a5d520259 100644 --- a/drivers/pci/irq.c +++ b/drivers/pci/irq.c @@ -94,6 +94,8 @@ 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); |