| Message ID | 1458183486-8113-1-git-send-email-shuahkh@osg.samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Adding Takashi Iwai On 03/16/2016 08:58 PM, Shuah Khan wrote: > media_snd_stream_delete() fails to release resources during unbind. This > leads to use-after-free in media_gobj_create() on a subsequent bind. > > [ 1445.086410] BUG: KASAN: use-after-free in media_gobj_create+0x3a1/0x470 [media] at addr ffff8801ead49998 > > [ 1445.086771] Call Trace: > [ 1445.086779] [<ffffffff81ade373>] dump_stack+0x67/0x94 > [ 1445.086785] [<ffffffff81523c29>] print_trailer+0xf9/0x150 > [ 1445.086790] [<ffffffff81529644>] object_err+0x34/0x40 > [ 1445.086796] [<ffffffff8152b9e1>] kasan_report_error+0x221/0x530 > [ 1445.086803] [<ffffffff8152bfb3>] __asan_report_store8_noabort+0x43/0x50 > [ 1445.086813] [<ffffffffa0a79341>] ? media_gobj_create+0x3a1/0x470 [media] > [ 1445.086822] [<ffffffffa0a79341>] media_gobj_create+0x3a1/0x470 [media] > [ 1445.086831] [<ffffffffa0a705a9>] media_device_register_entity+0x259/0x6f0 [media] > [ 1445.086841] [<ffffffffa0a70350>] ? media_device_unregister_entity_notify+0x100/0x100 [media] > [ 1445.086846] [<ffffffff81526232>] ? ___slab_alloc+0x172/0x500 > [ 1445.086854] [<ffffffff81203548>] ? mark_held_locks+0xc8/0x120 > [ 1445.086859] [<ffffffff81526610>] ? __slab_alloc+0x50/0x70 > [ 1445.086878] [<ffffffffa0fe711c>] ? media_snd_mixer_init+0x16c/0x500 [snd_usb_audio] > [ 1445.086884] [<ffffffff8152b086>] ? kasan_unpoison_shadow+0x36/0x50 > [ 1445.086890] [<ffffffff8152b086>] ? kasan_unpoison_shadow+0x36/0x50 > [ 1445.086895] [<ffffffff8152b0fe>] ? kasan_kmalloc+0x5e/0x70 > > Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com> > --- > sound/usb/media.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/sound/usb/media.c b/sound/usb/media.c > index 44a5de9..0d03773 100644 > --- a/sound/usb/media.c > +++ b/sound/usb/media.c > @@ -135,7 +135,7 @@ void media_snd_stream_delete(struct snd_usb_substream *subs) > if (mctl && mctl->media_dev) { > struct media_device *mdev; > > - mdev = subs->stream->chip->media_dev; > + mdev = mctl->media_dev; > if (mdev && media_devnode_is_registered(&mdev->devnode)) { > media_devnode_remove(mctl->intf_devnode); > media_device_unregister_entity(&mctl->media_entity); >
On Thu, 17 Mar 2016 03:58:06 +0100, Shuah Khan wrote: > > media_snd_stream_delete() fails to release resources during unbind. This > leads to use-after-free in media_gobj_create() on a subsequent bind. > > [ 1445.086410] BUG: KASAN: use-after-free in media_gobj_create+0x3a1/0x470 [media] at addr ffff8801ead49998 > > [ 1445.086771] Call Trace: > [ 1445.086779] [<ffffffff81ade373>] dump_stack+0x67/0x94 > [ 1445.086785] [<ffffffff81523c29>] print_trailer+0xf9/0x150 > [ 1445.086790] [<ffffffff81529644>] object_err+0x34/0x40 > [ 1445.086796] [<ffffffff8152b9e1>] kasan_report_error+0x221/0x530 > [ 1445.086803] [<ffffffff8152bfb3>] __asan_report_store8_noabort+0x43/0x50 > [ 1445.086813] [<ffffffffa0a79341>] ? media_gobj_create+0x3a1/0x470 [media] > [ 1445.086822] [<ffffffffa0a79341>] media_gobj_create+0x3a1/0x470 [media] > [ 1445.086831] [<ffffffffa0a705a9>] media_device_register_entity+0x259/0x6f0 [media] > [ 1445.086841] [<ffffffffa0a70350>] ? media_device_unregister_entity_notify+0x100/0x100 [media] > [ 1445.086846] [<ffffffff81526232>] ? ___slab_alloc+0x172/0x500 > [ 1445.086854] [<ffffffff81203548>] ? mark_held_locks+0xc8/0x120 > [ 1445.086859] [<ffffffff81526610>] ? __slab_alloc+0x50/0x70 > [ 1445.086878] [<ffffffffa0fe711c>] ? media_snd_mixer_init+0x16c/0x500 [snd_usb_audio] > [ 1445.086884] [<ffffffff8152b086>] ? kasan_unpoison_shadow+0x36/0x50 > [ 1445.086890] [<ffffffff8152b086>] ? kasan_unpoison_shadow+0x36/0x50 > [ 1445.086895] [<ffffffff8152b0fe>] ? kasan_kmalloc+0x5e/0x70 > > Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com> Mauro, please take it through your tree. Acked-by: Takashi Iwai <tiwai@suse.de> thanks, Takashi > --- > sound/usb/media.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/sound/usb/media.c b/sound/usb/media.c > index 44a5de9..0d03773 100644 > --- a/sound/usb/media.c > +++ b/sound/usb/media.c > @@ -135,7 +135,7 @@ void media_snd_stream_delete(struct snd_usb_substream *subs) > if (mctl && mctl->media_dev) { > struct media_device *mdev; > > - mdev = subs->stream->chip->media_dev; > + mdev = mctl->media_dev; > if (mdev && media_devnode_is_registered(&mdev->devnode)) { > media_devnode_remove(mctl->intf_devnode); > media_device_unregister_entity(&mctl->media_entity); > -- > 2.5.0 > > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@alsa-project.org > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel >
diff --git a/sound/usb/media.c b/sound/usb/media.c index 44a5de9..0d03773 100644 --- a/sound/usb/media.c +++ b/sound/usb/media.c @@ -135,7 +135,7 @@ void media_snd_stream_delete(struct snd_usb_substream *subs) if (mctl && mctl->media_dev) { struct media_device *mdev; - mdev = subs->stream->chip->media_dev; + mdev = mctl->media_dev; if (mdev && media_devnode_is_registered(&mdev->devnode)) { media_devnode_remove(mctl->intf_devnode); media_device_unregister_entity(&mctl->media_entity);
media_snd_stream_delete() fails to release resources during unbind. This leads to use-after-free in media_gobj_create() on a subsequent bind. [ 1445.086410] BUG: KASAN: use-after-free in media_gobj_create+0x3a1/0x470 [media] at addr ffff8801ead49998 [ 1445.086771] Call Trace: [ 1445.086779] [<ffffffff81ade373>] dump_stack+0x67/0x94 [ 1445.086785] [<ffffffff81523c29>] print_trailer+0xf9/0x150 [ 1445.086790] [<ffffffff81529644>] object_err+0x34/0x40 [ 1445.086796] [<ffffffff8152b9e1>] kasan_report_error+0x221/0x530 [ 1445.086803] [<ffffffff8152bfb3>] __asan_report_store8_noabort+0x43/0x50 [ 1445.086813] [<ffffffffa0a79341>] ? media_gobj_create+0x3a1/0x470 [media] [ 1445.086822] [<ffffffffa0a79341>] media_gobj_create+0x3a1/0x470 [media] [ 1445.086831] [<ffffffffa0a705a9>] media_device_register_entity+0x259/0x6f0 [media] [ 1445.086841] [<ffffffffa0a70350>] ? media_device_unregister_entity_notify+0x100/0x100 [media] [ 1445.086846] [<ffffffff81526232>] ? ___slab_alloc+0x172/0x500 [ 1445.086854] [<ffffffff81203548>] ? mark_held_locks+0xc8/0x120 [ 1445.086859] [<ffffffff81526610>] ? __slab_alloc+0x50/0x70 [ 1445.086878] [<ffffffffa0fe711c>] ? media_snd_mixer_init+0x16c/0x500 [snd_usb_audio] [ 1445.086884] [<ffffffff8152b086>] ? kasan_unpoison_shadow+0x36/0x50 [ 1445.086890] [<ffffffff8152b086>] ? kasan_unpoison_shadow+0x36/0x50 [ 1445.086895] [<ffffffff8152b0fe>] ? kasan_kmalloc+0x5e/0x70 Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com> --- sound/usb/media.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)