libceph: define and enforce CEPH_MAX_KEY_LEN

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[ Upstream commit ac431d597a ]

When decoding the key, verify that the key material would fit into
a fixed-size buffer in process_auth_done() and generally has a sane
length.

The new CEPH_MAX_KEY_LEN check replaces the existing check for a key
with no key material which is a) not universal since CEPH_CRYPTO_NONE
has to be excluded and b) doesn't provide much value since a smaller
than needed key is just as invalid as no key -- this has to be handled
elsewhere anyway.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Ilya Dryomov 2025-07-04 16:30:50 +02:00 • committed by Sasha Levin

parent a46cec9cc5

commit 1b275bd49e

3 changed files with 7 additions and 5 deletions

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8

net/ceph/crypto.c

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2

net/ceph/crypto.h

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2

net/ceph/messenger_v2.c

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