Hi, All Sorry, I am following the instructions in Documentation/networking/netdev-FAQ.txt to send out this mail, if I was wrong or there are more things I need to do, please let me know. After investigated on some failures of the android VtsKernelNetTest module test, I found that without the change of "ipv4+ipv6: Make INET*_ESP select CRYPTO_ECHAINIV", the config of CRYPTO_ECHAINIV will be generated as m by default in the .config file, which needs more module loading process to be done. But with the 4.9 and 4.14 kernels which have the change, CRYPTO_ECHAINIV will be generated as y by default in the .config file. We could set config of CRYPTO_ECHAINIV to y explicitly to generated the correct .config file, but having the change of "ipv4+ipv6: Make INET*_ESP select CRYPTO_ECHAINIV" cherry picked into the 4.4 stable kernel looks more like the right solution. The commit id for that change is 32b6170ca59ccf07d0e394561e54b2cd9726038c, it's already in 4.9 and 4.14 kernels, like here: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/net/?h=linux-4.9.y&id=32b6170ca59ccf07d0e394561e54b2cd9726038c https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/net/?h=linux-4.14.y&id=32b6170ca59ccf07d0e394561e54b2cd9726038c Could you please help to check if we could have 32b6170ca59ccf07d0e394561e54b2cd9726038c in the 4.4 stable kernel? The patch is here: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/patch/net?id=32b6170ca59ccf07d0e394561e54b2cd9726038c Thanks in advance! -- Best Regards, Yongqin Liu
