On Mon, Jul 13, 2015 at 01:31:23PM +0100, Ian Campbell wrote:
> If libxl_create_logfile fails for some reason then
> libxl__create_qemu_logfile previously just carried on and dereferenced
> the uninitialised logfile.
>
> Check for the error from libxl_create_logfile, which has already
> logged for us.
>
> This was reported as Debian bug #784880.
>
> Reported-by: Russell Coker <russ...@coker.com.au>
> Signed-off-by: Ian Campbell <ian.campb...@citrix.com>
> Cc: 784...@bugs.debian.org
Acked-by: Wei Liu <wei.l...@citrix.com>
> ---
> Should be backported.
> ---
> tools/libxl/libxl_dm.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/tools/libxl/libxl_dm.c b/tools/libxl/libxl_dm.c
> index ad434f0..8ed2d2e 100644
> --- a/tools/libxl/libxl_dm.c
> +++ b/tools/libxl/libxl_dm.c
> @@ -46,9 +46,11 @@ static const char *qemu_xen_path(libxl__gc *gc)
> static int libxl__create_qemu_logfile(libxl__gc *gc, char *name)
> {
> char *logfile;
> - int logfile_w;
> + int rc, logfile_w;
> +
> + rc = libxl_create_logfile(CTX, name, &logfile);
> + if (rc) return rc;
>
> - libxl_create_logfile(CTX, name, &logfile);
> logfile_w = open(logfile, O_WRONLY|O_CREAT|O_APPEND, 0644);
> free(logfile);
>
> --
> 2.1.4
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