selinux: Fix SCTP error inconsistency in selinux_socket_bind()

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Check sk->sk_protocol instead of security class to recognize SCTP socket.
SCTP socket is initialized with SECCLASS_SOCKET class if policy does not
support EXTSOCKCLASS capability. In this case bind(2) hook wrongfully
return EAFNOSUPPORT instead of EINVAL.

The inconsistency was detected with help of Landlock tests:
https://lore.kernel.org/all/b58680ca-81b2-7222-7287-0ac7f4227c3c@huawei-partners.com/

Fixes: 0f8db8cc73 ("selinux: add AF_UNSPEC and INADDR_ANY checks to selinux_socket_bind()")
Signed-off-by: Mikhail Ivanov <ivanov.mikhail1@huawei-partners.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

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Mikhail Ivanov 2024-11-12 22:52:03 +08:00 • committed by Paul Moore

parent c75c7945cd

commit 034294fbfd

1 changed files with 1 additions and 1 deletions

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security/selinux/hooks.c

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