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| author | Shunsuke Mie <mie@igel.co.jp> | 2022-09-07 11:00:59 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-10-15 07:59:04 +0200 |
| commit | cb9defecf381415f6aeb433a05a6c4374775e9d6 (patch) | |
| tree | c00c9cf3c7ceb3b9e042618f2872ab3c863dec9e | |
| parent | 2c657a0cbd481eda0a6e12c45f55f03d3332223b (diff) | |
| download | linux-stable-cb9defecf381415f6aeb433a05a6c4374775e9d6.tar.gz linux-stable-cb9defecf381415f6aeb433a05a6c4374775e9d6.tar.bz2 linux-stable-cb9defecf381415f6aeb433a05a6c4374775e9d6.zip | |
misc: pci_endpoint_test: Aggregate params checking for xfer
commit 3e42deaac06567c7e86d287c305ccda24db4ae3d upstream.
Each transfer test functions have same parameter checking code. This patch
unites those to an introduced function.
Signed-off-by: Shunsuke Mie <mie@igel.co.jp>
Cc: stable <stable@kernel.org>
Link: https://lore.kernel.org/r/20220907020100.122588-1-mie@igel.co.jp
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/misc/pci_endpoint_test.c | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c index 2ed7e3aaff3a..b27648641f12 100644 --- a/drivers/misc/pci_endpoint_test.c +++ b/drivers/misc/pci_endpoint_test.c @@ -332,6 +332,17 @@ static bool pci_endpoint_test_msi_irq(struct pci_endpoint_test *test, return false; } +static int pci_endpoint_test_validate_xfer_params(struct device *dev, + struct pci_endpoint_test_xfer_param *param, size_t alignment) +{ + if (param->size > SIZE_MAX - alignment) { + dev_dbg(dev, "Maximum transfer data size exceeded\n"); + return -EINVAL; + } + + return 0; +} + static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, unsigned long arg) { @@ -363,9 +374,11 @@ static bool pci_endpoint_test_copy(struct pci_endpoint_test *test, return false; } + err = pci_endpoint_test_validate_xfer_params(dev, ¶m, alignment); + if (err) + return false; + size = param.size; - if (size > SIZE_MAX - alignment) - goto err; use_dma = !!(param.flags & PCITEST_FLAGS_USE_DMA); if (use_dma) @@ -497,9 +510,11 @@ static bool pci_endpoint_test_write(struct pci_endpoint_test *test, return false; } + err = pci_endpoint_test_validate_xfer_params(dev, ¶m, alignment); + if (err) + return false; + size = param.size; - if (size > SIZE_MAX - alignment) - goto err; use_dma = !!(param.flags & PCITEST_FLAGS_USE_DMA); if (use_dma) @@ -595,9 +610,11 @@ static bool pci_endpoint_test_read(struct pci_endpoint_test *test, return false; } + err = pci_endpoint_test_validate_xfer_params(dev, ¶m, alignment); + if (err) + return false; + size = param.size; - if (size > SIZE_MAX - alignment) - goto err; use_dma = !!(param.flags & PCITEST_FLAGS_USE_DMA); if (use_dma) |