On 11/20/24 2:51 AM, Hangbin Liu wrote:
RFC8981 section 3.4 says that existing temporary addresses must have their lifetimes adjusted so that no temporary addresses should ever remain "valid" or "preferred" longer than the incoming SLAAC Prefix Information. This would strongly imply in Linux's case that if the "mngtmpaddr" address is deleted or un-flagged as such, its corresponding temporary addresses must be cleared out right away.
But now the temporary address is renewed even after ‘mngtmpaddr’ is removed or becomes unmanaged as manage_tempaddrs() set temporary addresses prefered/valid time to 0, and later in addrconf_verify_rtnl() all checkings failed to remove the addresses. Fix this by deleting the temporary address directly for these situations.
Fixes: 778964f2fdf0 ("ipv6/addrconf: fix timing bug in tempaddr regen") Signed-off-by: Hangbin Liu liuhangbin@gmail.com
net/ipv6/addrconf.c | 41 +++++++++++++++++++++++++++++------------ 1 file changed, 29 insertions(+), 12 deletions(-)
Reviewed-by: David Ahern dsahern@kernel.org