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 18:18:07 -0700 [thread overview]
Message-ID: <000000000000e5d6a906093546db@google.com> (raw)
In-Reply-To: <00000000000055ef9a0609336580@google.com>
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linux-kernel@vger.kernel.org.
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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/vfio_compat.c b/drivers/iommu/iommufd/vfio_compat.c
index 6c810bf80f99..85cff4489757 100644
--- a/drivers/iommu/iommufd/vfio_compat.c
+++ b/drivers/iommu/iommufd/vfio_compat.c
@@ -138,6 +138,8 @@ int iommufd_vfio_ioas(struct iommufd_ucmd *ucmd)
case IOMMU_VFIO_IOAS_SET:
ioas = iommufd_get_ioas(ucmd->ictx, cmd->ioas_id);
+ if (!ioas)
+ return -EINVAL;
if (IS_ERR(ioas))
return PTR_ERR(ioas);
xa_lock(&ucmd->ictx->objects);
next prev parent reply other threads:[~2023-11-03 1:18 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 [this message]
2023-11-03 5:36 ` [syzbot] test uaf " syzbot
2023-11-03 7:09 ` syzbot
2023-11-03 7:58 ` syzbot
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