cipso: fix total option length computation

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[ Upstream commit 9f36169912 ]

As evident from the definition of ip_options_get(), the IP option
IPOPT_END is used to pad the IP option data array, not IPOPT_NOP. Yet
the loop that walks the IP options to determine the total IP options
length in cipso_v4_delopt() doesn't take IPOPT_END into account.

Fix it by recognizing the IPOPT_END value as the end of actual options.

Fixes: 014ab19a69 ("selinux: Set socket NetLabel based on connection endpoint")
Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Ondrej Mosnacek 2024-06-07 18:07:52 +02:00 • committed by Greg Kroah-Hartman

parent 23a52ca69c

commit 08fa10b265

1 changed files with 8 additions and 4 deletions

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net/ipv4/cipso_ipv4.c

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