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Message-ID: <20180915013422.180023-25-alexander.levin@microsoft.com>
Date: Sat, 15 Sep 2018 01:34:41 +0000
From: Sasha Levin <Alexander.Levin@...rosoft.com>
To: "stable@...r.kernel.org" <stable@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC: Wei Lu <wei.lu2@....com>, Felix Kuehling <Felix.Kuehling@....com>,
Oded Gabbay <oded.gabbay@...il.com>,
Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL 4.9 25/34] drm/amdkfd: Fix error codes in
kfd_get_process
From: Wei Lu <wei.lu2@....com>
[ Upstream commit e47cb828eb3fca3e8999a0b9aa053dda18552071 ]
Return ERR_PTR(-EINVAL) if kfd_get_process fails to find the process.
This fixes kernel oopses when a child process calls KFD ioctls with
a file descriptor inherited from the parent process.
Signed-off-by: Wei Lu <wei.lu2@....com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@....com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@....com>
Acked-by: Christian König <christian.koenig@....com>
Signed-off-by: Oded Gabbay <oded.gabbay@...il.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_process.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index 171480bb95d0..6e7eb76189f9 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -124,6 +124,8 @@ struct kfd_process *kfd_get_process(const struct task_struct *thread)
return ERR_PTR(-EINVAL);
process = find_process(thread);
+ if (!process)
+ return ERR_PTR(-EINVAL);
return process;
}
--
2.17.1
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