From: syzbot <syzbot+d31adfb277377ef8fcba@syzkaller.appspotmail.com>
To: linux-kernel@vger.kernel.org
Subject: Re: [syzbot] test uaf in iommufd_vfio_ioas
Date: Thu, 02 Nov 2023 22:36:44 -0700 [thread overview]
Message-ID: <000000000000ce1903060938e365@google.com> (raw)
In-Reply-To: <00000000000055ef9a0609336580@google.com>
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Subject: test uaf in iommufd_vfio_ioas
Author: lizhi.xu@windriver.com
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 2af9b20dbb39
diff --git a/drivers/iommu/iommufd/main.c b/drivers/iommu/iommufd/main.c
index e71523cbd0de..e89c90784536 100644
--- a/drivers/iommu/iommufd/main.c
+++ b/drivers/iommu/iommufd/main.c
@@ -159,7 +159,8 @@ static struct iommufd_object *iommufd_object_remove(struct iommufd_ctx *ictx,
}
xas_store(&xas, NULL);
- if (ictx->vfio_ioas == container_of(obj, struct iommufd_ioas, obj))
+ __xa_erase(&ictx->objects, obj->id);
+ if (ictx->vfio_ioas && &ictx->vfio_ioas->obj == obj)
ictx->vfio_ioas = NULL;
out_xa:
next prev parent reply other threads:[~2023-11-03 5:36 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-02 23:03 [syzbot] [iommu?] KASAN: slab-use-after-free Read in iommufd_vfio_ioas syzbot
2023-11-03 1:18 ` [syzbot] test uaf " syzbot
2023-11-03 5:36 ` syzbot [this message]
2023-11-03 7:09 ` syzbot
2023-11-03 7:58 ` syzbot
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