nvme-pci: use sgls for all user requests if possible

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[ Upstream commit 6fad84a4d6 ]

If the device supports SGLs, use these for all user requests. This
format encodes the expected transfer length so it can catch short buffer
errors in a user command, whether it occurred accidently or maliciously.

For controllers that support SGL data mode, this is a viable mitigation
to CVE-2023-6238. For controllers that don't support SGLs, log a warning
in the passthrough path since not having the capability can corrupt
data if the interface is not used correctly.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Stable-dep-of: 00817f0f1c ("nvme-ioctl: fix leaked requests on mapping error")
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Keith Busch 2024-11-08 15:41:08 -08:00 • committed by Greg Kroah-Hartman

parent 595a5b23eb

commit 3c63fb6ef7

2 changed files with 13 additions and 4 deletions

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12

drivers/nvme/host/ioctl.c

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5

drivers/nvme/host/pci.c

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