misc: pci_endpoint_test: Fix array underflow in pci_endpoint_test_ioctl()

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[ Upstream commit 1ad82f9db1 ]

Commit eefb83790a ("misc: pci_endpoint_test: Add doorbell test case")
added NO_BAR (-1) to the pci_barno enum which, in practical terms,
changes the enum from an unsigned int to a signed int.  If the user
passes a negative number in pci_endpoint_test_ioctl() then it results in
an array underflow in pci_endpoint_test_bar().

Fixes: eefb83790a ("misc: pci_endpoint_test: Add doorbell test case")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/aIzzZ4vc6ZrmM9rI@suswa
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Dan Carpenter 2025-08-01 20:03:35 +03:00 • committed by Greg Kroah-Hartman

parent 77732c58fe

commit 6df3687922

1 changed files with 1 additions and 1 deletions

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drivers/misc/pci_endpoint_test.c

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