net: mctp: add an explicit reference from a mctp_sk_key to sock

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[ Upstream commit de8a6b15d9 ]

Currently, we correlate the mctp_sk_key lifetime to the sock lifetime
through the sock hash/unhash operations, but this is pretty tenuous, and
there are cases where we may have a temporary reference to an unhashed
sk.

This change makes the reference more explicit, by adding a hold on the
sock when it's associated with a mctp_sk_key, released on final key
unref.

Fixes: 73c618456d ("mctp: locking, lifetime and validity changes for sk_keys")
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Jeremy Kerr 2023-01-24 10:01:03 +08:00 • committed by Greg Kroah-Hartman

parent d46d7516cb

commit d0cdcc3da9

1 changed files with 8 additions and 6 deletions

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net/mctp/route.c

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