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[ Upstream commitefb9f4f19f] seg6_hmac_init_algo returns without cleaning up the previous allocations if one fails, so it's going to leak all that memory and the crypto tfms. Update seg6_hmac_exit to only free the memory when allocated, so we can reuse the code directly. Fixes:bf355b8d2c("ipv6: sr: add core files for SR HMAC support") Reported-by: Sabrina Dubroca <sd@queasysnail.net> Closes: https://lore.kernel.org/netdev/Zj3bh-gE7eT6V6aH@hog/ Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Reviewed-by: Simon Horman <horms@kernel.org> Reviewed-by: Sabrina Dubroca <sd@queasysnail.net> Link: https://lore.kernel.org/r/20240517005435.2600277-1-liuhangbin@gmail.com Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>