Message ID | 94cd5ba46b74eea289a7e582635820c1c54e66fa.1371546907.git.peter.crosthwaite@xilinx.com |
---|---|
State | New |
Headers | show |
Il 18/06/2013 11:18, peter.crosthwaite@xilinx.com ha scritto: > From: Peter Crosthwaite <peter.crosthwaite@xilinx.com> > > Its clear from the implementation that class casting is supposed to work > with a NULL class argument. Guard all dereferences of the class argument > against NULL accordingly. > > Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Cc: qemu-stable@nongnu.org > --- > > qom/object.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/qom/object.c b/qom/object.c > index 803b94b..b7ecb9f 100644 > --- a/qom/object.c > +++ b/qom/object.c > @@ -531,14 +531,14 @@ ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class, > #ifdef CONFIG_QOM_CAST_DEBUG > int i; > > - for (i = 0; i < OBJECT_CLASS_CAST_CACHE; i++) { > + for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) { > if (class->cast_cache[i] == typename) { > ret = class; > goto out; > } > } > #else > - if (!class->interfaces) { > + if (!class || !class->interfaces) { > return class; > } > #endif > @@ -551,7 +551,7 @@ ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class, > } > > #ifdef CONFIG_QOM_CAST_DEBUG > - if (ret == class) { > + if (class && ret == class) { > for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) { > class->cast_cache[i - 1] = class->cast_cache[i]; > } >
Ping! On Tue, Jun 18, 2013 at 7:18 PM, <peter.crosthwaite@xilinx.com> wrote: > From: Peter Crosthwaite <peter.crosthwaite@xilinx.com> > > Its clear from the implementation that class casting is supposed to work > with a NULL class argument. Guard all dereferences of the class argument > against NULL accordingly. > > Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> > --- > > qom/object.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/qom/object.c b/qom/object.c > index 803b94b..b7ecb9f 100644 > --- a/qom/object.c > +++ b/qom/object.c > @@ -531,14 +531,14 @@ ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class, > #ifdef CONFIG_QOM_CAST_DEBUG > int i; > > - for (i = 0; i < OBJECT_CLASS_CAST_CACHE; i++) { > + for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) { > if (class->cast_cache[i] == typename) { > ret = class; > goto out; > } > } > #else > - if (!class->interfaces) { > + if (!class || !class->interfaces) { > return class; > } > #endif > @@ -551,7 +551,7 @@ ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class, > } > > #ifdef CONFIG_QOM_CAST_DEBUG > - if (ret == class) { > + if (class && ret == class) { > for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) { > class->cast_cache[i - 1] = class->cast_cache[i]; > } > -- > 1.8.3.rc1.44.gb387c77.dirty >
Applied. Thanks. Regards, Anthony Liguori
diff --git a/qom/object.c b/qom/object.c index 803b94b..b7ecb9f 100644 --- a/qom/object.c +++ b/qom/object.c @@ -531,14 +531,14 @@ ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class, #ifdef CONFIG_QOM_CAST_DEBUG int i; - for (i = 0; i < OBJECT_CLASS_CAST_CACHE; i++) { + for (i = 0; class && i < OBJECT_CLASS_CAST_CACHE; i++) { if (class->cast_cache[i] == typename) { ret = class; goto out; } } #else - if (!class->interfaces) { + if (!class || !class->interfaces) { return class; } #endif @@ -551,7 +551,7 @@ ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class, } #ifdef CONFIG_QOM_CAST_DEBUG - if (ret == class) { + if (class && ret == class) { for (i = 1; i < OBJECT_CLASS_CAST_CACHE; i++) { class->cast_cache[i - 1] = class->cast_cache[i]; }