From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
amd-gfx@lists.freedesktop.org,
Felix Kuehling <Felix.Kuehling@amd.com>,
dri-devel@lists.freedesktop.org,
Kent Russell <kent.russell@amd.com>,
Alex Deucher <alexander.deucher@amd.com>
Subject: [PATCH AUTOSEL 5.9 09/15] drm/amdkfd: Fix leak in dmabuf import
Date: Sat, 19 Dec 2020 22:34:27 -0500 [thread overview]
Message-ID: <20201220033434.2728348-9-sashal@kernel.org> (raw)
In-Reply-To: <20201220033434.2728348-1-sashal@kernel.org>
From: Felix Kuehling <Felix.Kuehling@amd.com>
[ Upstream commit c897934da15f182ce99536007f8ef61c4748c07e ]
Release dmabuf reference before returning from kfd_ioctl_import_dmabuf.
amdgpu_amdkfd_gpuvm_import_dmabuf takes a reference to the underlying
GEM BO and doesn't keep the reference to the dmabuf wrapper.
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Kent Russell <kent.russell@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index e9b96ad3d9a52..fdad4d108dd36 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -1729,6 +1729,7 @@ static int kfd_ioctl_import_dmabuf(struct file *filep,
}
mutex_unlock(&p->mutex);
+ dma_buf_put(dmabuf);
args->handle = MAKE_HANDLE(args->gpu_id, idr_handle);
@@ -1738,6 +1739,7 @@ static int kfd_ioctl_import_dmabuf(struct file *filep,
amdgpu_amdkfd_gpuvm_free_memory_of_gpu(dev->kgd, (struct kgd_mem *)mem, NULL);
err_unlock:
mutex_unlock(&p->mutex);
+ dma_buf_put(dmabuf);
return r;
}
--
2.27.0
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prev parent reply other threads:[~2020-12-20 3:34 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20201220033434.2728348-1-sashal@kernel.org>
2020-12-20 3:34 ` [PATCH AUTOSEL 5.9 08/15] drm/amd/display: Prevent bandwidth overflow Sasha Levin
2020-12-20 3:34 ` Sasha Levin [this message]
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