net/tcp-ao: Fix MAC comparison to be constant-time

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commit 67edfec516 upstream.

To prevent timing attacks, MACs need to be compared in constant
time.  Use the appropriate helper function for this.

Fixes: 0a3a809089 ("net/tcp: Verify inbound TCP-AO signed segments")
Cc: stable@vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Reviewed-by: Dmitry Safonov <0x7f454c46@gmail.com>
Link: https://patch.msgid.link/20260302203600.13561-1-ebiggers@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Eric Biggers 2026-03-02 12:36:00 -08:00 • committed by Greg Kroah-Hartman

parent 12db29803c

commit a269cbdc44

2 changed files with 3 additions and 1 deletions

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net/ipv4/Kconfig

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3

net/ipv4/tcp_ao.c

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