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Message-Id: <20221013175146.330866983@linuxfoundation.org>
Date: Thu, 13 Oct 2022 19:53:04 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Shunsuke Mie <mie@...l.co.jp>,
stable <stable@...nel.org>
Subject: [PATCH 5.19 32/33] misc: pci_endpoint_test: Aggregate params checking for xfer
From: Shunsuke Mie <mie@...l.co.jp>
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@...l.co.jp>
Cc: stable <stable@...nel.org>
Link: https://lore.kernel.org/r/20220907020100.122588-1-mie@igel.co.jp
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/misc/pci_endpoint_test.c | 29 +++++++++++++++++++++++------
1 file changed, 23 insertions(+), 6 deletions(-)
--- 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(st
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(struc
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(stru
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(struc
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)
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