Hi Eric, > It isn't clearly defined what happens if you read from an AF_ALG request > socket without previously sending the control data to begin an > encryption or decryption operation. On some kernels the read will > return 0, while on others it will block. > Testing this corner case isn't the purpose of af_alg02; it just wants to > try to encrypt a zero-length message. So, change it to explicitly send > a zero-length message with control data. > This fixes the test failure reported at > https://lkml.kernel.org/r/CA+G9fYtebf78TH-XpqArunHc1L6s9mHdLEbpY1EY9tSyDjp=sg@xxxxxxxxxxxxxx > Fixing the test in this way was also previously suggested at > https://lkml.kernel.org/r/20200702033221.GA19367@xxxxxxxxxxxxxxxxxxx > Note, this patch doesn't change the fact that the read() still blocks on > pre-4.14 kernels (which is a kernel bug), and thus the timeout logic in > the test is still needed. Thanks for the fix, merged! Kind regards, Petr
