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Re: [Qemu-devel] [PATCH] migration/rdma: Fix uninitialised rdma_return_p
From: |
Dr. David Alan Gilbert |
Subject: |
Re: [Qemu-devel] [PATCH] migration/rdma: Fix uninitialised rdma_return_path |
Date: |
Mon, 3 Sep 2018 13:17:53 +0100 |
User-agent: |
Mutt/1.10.1 (2018-07-13) |
* Thomas Huth (address@hidden) wrote:
> On 2018-08-30 19:36, Dr. David Alan Gilbert (git) wrote:
> > From: "Dr. David Alan Gilbert" <address@hidden>
> >
> > Clang correctly errors out moaning that rdma_return_path
> > is used uninitialised in the earlier error paths.
> > Make it NULL so that the error path ignores it.
> >
> > Fixes: 55cc1b5937a8e709e4c102e74b206281073aab82
> > Signed-off-by: Dr. David Alan Gilbert <address@hidden>
> > Reprorted by: Cornelia Huck <address@hidden>
> > ---
> > migration/rdma.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/migration/rdma.c b/migration/rdma.c
> > index ae07515e83..9b2e7e10aa 100644
> > --- a/migration/rdma.c
> > +++ b/migration/rdma.c
> > @@ -4012,7 +4012,7 @@ static void rdma_accept_incoming_migration(void
> > *opaque)
> > void rdma_start_incoming_migration(const char *host_port, Error **errp)
> > {
> > int ret;
> > - RDMAContext *rdma, *rdma_return_path;
> > + RDMAContext *rdma, *rdma_return_path = NULL;
> > Error *local_err = NULL;
> >
> > trace_rdma_start_incoming_migration();
>
> This will silence the error from clang for sure, so:
>
> Reviewed-by: Thomas Huth <address@hidden>
>
> But actually, the g_free(rdma_return_path); at the end of the function
> is dead code, since it will always be called with rdma_return_path ==
> NULL. Maybe we should rather remove that g_free() instead?
It's nice keeping the rdma/rdma_return_path semetric there so that if
we add other code into it the err path still cleans up.
Dave
> Thomas
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK