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7445aaa9fe
Replace the manual ND option parsing loop in br_nd_send() with ndisc_parse_options(), which provides proper validation and avoids the class of bugs that were fixed by commit53fc685243("bridge: Avoid infinite loop when suppressing NS messages with invalid options") and commit850837965a("bridge: br_nd_send: validate ND option lengths"). Use ndisc_opt_addr_data() to extract the source link-layer address from the parsed options, which correctly validates the option length for the underlying device type. Export ndisc_parse_options() so that it can be resolved from the bridge when it is built as a module (CONFIG_BRIDGE=m); otherwise modpost fails with an undefined symbol. Reviewed-by: Petr Machata <petrm@nvidia.com> Acked-by: Nikolay Aleksandrov <razor@blackwall.org> Signed-off-by: Danielle Ratson <danieller@nvidia.com> Link: https://patch.msgid.link/20260803112505.613873-6-danieller@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>