* [PATCH] dbus-vmstate: replace g_return with error handling
@ 2020-11-18 8:29 marcandre.lureau
2020-11-18 16:31 ` Markus Armbruster
0 siblings, 1 reply; 3+ messages in thread
From: marcandre.lureau @ 2020-11-18 8:29 UTC (permalink / raw)
To: qemu-devel; +Cc: Marc-André Lureau, armbru
From: Marc-André Lureau <marcandre.lureau@redhat.com>
Since g_input_stream_read_all() may return less than requested when the
stream is malformed, we should treat this condition as a runtime user
error (g_return are for programming errors).
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
backends/dbus-vmstate.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/backends/dbus-vmstate.c b/backends/dbus-vmstate.c
index bd050e8e9c..616d291cfb 100644
--- a/backends/dbus-vmstate.c
+++ b/backends/dbus-vmstate.c
@@ -229,7 +229,10 @@ static int dbus_vmstate_post_load(void *opaque, int version_id)
&bytes_read, NULL, &err)) {
goto error;
}
- g_return_val_if_fail(bytes_read == len, -1);
+ if (bytes_read != len) {
+ error_report("%s: Failed to read proxy Id", __func__);
+ return -1;
+ }
id[len] = 0;
trace_dbus_vmstate_loading(id);
--
2.29.0
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] dbus-vmstate: replace g_return with error handling
2020-11-18 8:29 [PATCH] dbus-vmstate: replace g_return with error handling marcandre.lureau
@ 2020-11-18 16:31 ` Markus Armbruster
2021-08-25 15:44 ` Marc-André Lureau
0 siblings, 1 reply; 3+ messages in thread
From: Markus Armbruster @ 2020-11-18 16:31 UTC (permalink / raw)
To: marcandre.lureau; +Cc: qemu-devel
marcandre.lureau@redhat.com writes:
> From: Marc-André Lureau <marcandre.lureau@redhat.com>
>
> Since g_input_stream_read_all() may return less than requested when the
> stream is malformed, we should treat this condition as a runtime user
> error (g_return are for programming errors).
>
> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> ---
> backends/dbus-vmstate.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/backends/dbus-vmstate.c b/backends/dbus-vmstate.c
> index bd050e8e9c..616d291cfb 100644
> --- a/backends/dbus-vmstate.c
> +++ b/backends/dbus-vmstate.c
> @@ -229,7 +229,10 @@ static int dbus_vmstate_post_load(void *opaque, int version_id)
> &bytes_read, NULL, &err)) {
> goto error;
> }
> - g_return_val_if_fail(bytes_read == len, -1);
> + if (bytes_read != len) {
> + error_report("%s: Failed to read proxy Id", __func__);
Error messages containing function names are code smell. It's
consustent with nearby errors, i.e. this patch is not to blame.
> + return -1;
> + }
> id[len] = 0;
>
> trace_dbus_vmstate_loading(id);
Reviewed-by: Markus Armbruster <armbru@redhat.com>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] dbus-vmstate: replace g_return with error handling
2020-11-18 16:31 ` Markus Armbruster
@ 2021-08-25 15:44 ` Marc-André Lureau
0 siblings, 0 replies; 3+ messages in thread
From: Marc-André Lureau @ 2021-08-25 15:44 UTC (permalink / raw)
To: Markus Armbruster; +Cc: QEMU
[-- Attachment #1: Type: text/plain, Size: 1623 bytes --]
Hi
On Wed, Nov 18, 2020 at 8:33 PM Markus Armbruster <armbru@redhat.com> wrote:
> marcandre.lureau@redhat.com writes:
>
> > From: Marc-André Lureau <marcandre.lureau@redhat.com>
> >
> > Since g_input_stream_read_all() may return less than requested when the
> > stream is malformed, we should treat this condition as a runtime user
> > error (g_return are for programming errors).
> >
> > Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> > ---
> > backends/dbus-vmstate.c | 5 ++++-
> > 1 file changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/backends/dbus-vmstate.c b/backends/dbus-vmstate.c
> > index bd050e8e9c..616d291cfb 100644
> > --- a/backends/dbus-vmstate.c
> > +++ b/backends/dbus-vmstate.c
> > @@ -229,7 +229,10 @@ static int dbus_vmstate_post_load(void *opaque, int
> version_id)
> > &bytes_read, NULL, &err)) {
> > goto error;
> > }
> > - g_return_val_if_fail(bytes_read == len, -1);
> > + if (bytes_read != len) {
> > + error_report("%s: Failed to read proxy Id", __func__);
>
> Error messages containing function names are code smell. It's
> consustent with nearby errors, i.e. this patch is not to blame.
>
> > + return -1;
> > + }
> > id[len] = 0;
> >
> > trace_dbus_vmstate_loading(id);
>
> Reviewed-by: Markus Armbruster <armbru@redhat.com>
>
>
>
For the record, Markus sent a similar patch later "backends/dbus-vmstate:
Fix short read error handling", which has been applied.
--
Marc-André Lureau
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2020-11-18 8:29 [PATCH] dbus-vmstate: replace g_return with error handling marcandre.lureau
2020-11-18 16:31 ` Markus Armbruster
2021-08-25 15:44 ` Marc-André Lureau
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