| Message ID | 1456285491-6952-1-git-send-email-jasowang@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Wed, Feb 24, 2016 at 11:44 AM, Jason Wang <jasowang@redhat.com> wrote: > Qemu may crash when we want to add two filters on the same netdev but > the initialization of second fails (e.g missing parameters): > > ./qemu-system-x86_64 -netdev user,id=un0 \ > -object filter-buffer,id=f0,netdev=un0,interval=10 \ > -object filter-buffer,id=f1,netdev=un0 > Segmentation fault (core dumped) > > This is because we don't check whether or not the filter was in the > list of netdev. This patch fixes this. Oops, thanks for catching this! > > Cc: Yang Hongyang <hongyang.yang@easystack.cn> > Signed-off-by: Jason Wang <jasowang@redhat.com> --- > net/filter.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/net/filter.c b/net/filter.c > index d2a514e..7cdbc6c 100644 > --- a/net/filter.c > +++ b/net/filter.c > @@ -196,7 +196,8 @@ static void netfilter_finalize(Object *obj) > nfc->cleanup(nf); > } > > - if (nf->netdev && !QTAILQ_EMPTY(&nf->netdev->filters)) { > + if (nf->netdev && !QTAILQ_EMPTY(&nf->netdev->filters) && > + nf->next.tqe_prev) { > Using queue's inner member tqe_prev directly might not be a good idea?but seems there's no better way to do this. Are there any chance that we could add a QTAILQ_XXX helper to check whether a member is in the queue or not? Just some thoughts, I'm ok with the current patch though, so: Reviewed-by: Yang Hongyang <hongyang.yang@easystack.cn> > QTAILQ_REMOVE(&nf->netdev->filters, nf, next); > } > g_free(nf->netdev_id); > -- > 2.5.0 > > >
On 02/24/2016 07:53 PM, Yang Hongyang wrote: > > On Wed, Feb 24, 2016 at 11:44 AM, Jason Wang <jasowang@redhat.com > <mailto:jasowang@redhat.com>> wrote: > > Qemu may crash when we want to add two filters on the same netdev but > the initialization of second fails (e.g missing parameters): > > ./qemu-system-x86_64 -netdev user,id=un0 \ > -object filter-buffer,id=f0,netdev=un0,interval=10 \ > -object filter-buffer,id=f1,netdev=un0 > Segmentation fault (core dumped) > > This is because we don't check whether or not the filter was in the > list of netdev. This patch fixes this. > > > Oops, thanks for catching this! > > > > Cc: Yang Hongyang <hongyang.yang@easystack.cn > <mailto:hongyang.yang@easystack.cn>> > Signed-off-by: Jason Wang <jasowang@redhat.com > <mailto:jasowang@redhat.com>> > > --- > net/filter.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/net/filter.c b/net/filter.c > index d2a514e..7cdbc6c 100644 > --- a/net/filter.c > +++ b/net/filter.c > @@ -196,7 +196,8 @@ static void netfilter_finalize(Object *obj) > nfc->cleanup(nf); > } > > - if (nf->netdev && !QTAILQ_EMPTY(&nf->netdev->filters)) { > + if (nf->netdev && !QTAILQ_EMPTY(&nf->netdev->filters) && > + nf->next.tqe_prev) { > > > Using queue's inner member tqe_prev directly might not be a good idea?but > seems there's no better way to do this. > Are there any chance that we could add a QTAILQ_XXX helper to check > whether a > member is in the queue or not? Might be a good idea, but I'm not sure. > Just some thoughts, I'm ok with the current patch though, so: > > Reviewed-by: Yang Hongyang <hongyang.yang@easystack.cn > <mailto:hongyang.yang@easystack.cn>> Applied to -net. Thanks > > > QTAILQ_REMOVE(&nf->netdev->filters, nf, next); > } > g_free(nf->netdev_id); > -- > 2.5.0 > > > > > > -- > Thanks, > Yang
diff --git a/net/filter.c b/net/filter.c index d2a514e..7cdbc6c 100644 --- a/net/filter.c +++ b/net/filter.c @@ -196,7 +196,8 @@ static void netfilter_finalize(Object *obj) nfc->cleanup(nf); } - if (nf->netdev && !QTAILQ_EMPTY(&nf->netdev->filters)) { + if (nf->netdev && !QTAILQ_EMPTY(&nf->netdev->filters) && + nf->next.tqe_prev) { QTAILQ_REMOVE(&nf->netdev->filters, nf, next); } g_free(nf->netdev_id);
Qemu may crash when we want to add two filters on the same netdev but the initialization of second fails (e.g missing parameters): ./qemu-system-x86_64 -netdev user,id=un0 \ -object filter-buffer,id=f0,netdev=un0,interval=10 \ -object filter-buffer,id=f1,netdev=un0 Segmentation fault (core dumped) This is because we don't check whether or not the filter was in the list of netdev. This patch fixes this. Cc: Yang Hongyang <hongyang.yang@easystack.cn> Signed-off-by: Jason Wang <jasowang@redhat.com> --- net/filter.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)