Re: [PATCH liburing 1/2] test/send_recvmsg: Preserve msghdr until op_recvmsg completes

Gabriel Krisman Bertazi <[email protected]> writes:

> msghdr is allocated on the stack at recv_prep, which means it may go out
> of scope before the kernel has a chance to complete the operation.  This
> results in spurious test failures when we reach far enough into recv_fn
> to reuse the stack space before op_recvmsg executes.  I found it easily
> reproducible when compiling with '-O0 -g3' to avoid gcc from optimizing
> further local variables out of the stack.

In hindsight, I should clarify that by 'test failure' I mean a
segmentation fault in the testcase, not a T_EXIT_FAIL. Should have put
that in the commit message.

-- 
Gabriel Krisman Bertazi