From: Min Li <lm0963hack@gmail.com>
To: alexander.deucher@amd.com
Cc: christian.koenig@amd.com, Xinhui.Pan@amd.com, airlied@gmail.com,
daniel@ffwll.ch, sumit.semwal@linaro.org,
amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
linaro-mm-sig@lists.linaro.org
Subject: [PATCH] drm/radeon: fix race condition UAF in radeon_gem_set_domain_ioctl
Date: Fri, 26 May 2023 20:37:53 +0800 [thread overview]
Message-ID: <20230526123753.16160-1-lm0963hack@gmail.com> (raw)
Userspace can race to free the gobj(robj converted from), robj should not
be accessed again after drm_gem_object_put, otherwith it will result in
use-after-free.
Signed-off-by: Min Li <lm0963hack@gmail.com>
---
drivers/gpu/drm/radeon/radeon_gem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c
index bdc5af23f005..450c7cbdd28a 100644
--- a/drivers/gpu/drm/radeon/radeon_gem.c
+++ b/drivers/gpu/drm/radeon/radeon_gem.c
@@ -478,7 +478,7 @@ int radeon_gem_set_domain_ioctl(struct drm_device *dev, void *data,
drm_gem_object_put(gobj);
up_read(&rdev->exclusive_lock);
- r = radeon_gem_handle_lockup(robj->rdev, r);
+ r = radeon_gem_handle_lockup(rdev, r);
return r;
}
--
2.34.1
WARNING: multiple messages have this Message-ID (diff)
From: Min Li <lm0963hack@gmail.com>
To: alexander.deucher@amd.com
Cc: Xinhui.Pan@amd.com, linux-kernel@vger.kernel.org,
amd-gfx@lists.freedesktop.org, sumit.semwal@linaro.org,
linaro-mm-sig@lists.linaro.org, dri-devel@lists.freedesktop.org,
christian.koenig@amd.com, linux-media@vger.kernel.org
Subject: [PATCH] drm/radeon: fix race condition UAF in radeon_gem_set_domain_ioctl
Date: Fri, 26 May 2023 20:37:53 +0800 [thread overview]
Message-ID: <20230526123753.16160-1-lm0963hack@gmail.com> (raw)
Userspace can race to free the gobj(robj converted from), robj should not
be accessed again after drm_gem_object_put, otherwith it will result in
use-after-free.
Signed-off-by: Min Li <lm0963hack@gmail.com>
---
drivers/gpu/drm/radeon/radeon_gem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c
index bdc5af23f005..450c7cbdd28a 100644
--- a/drivers/gpu/drm/radeon/radeon_gem.c
+++ b/drivers/gpu/drm/radeon/radeon_gem.c
@@ -478,7 +478,7 @@ int radeon_gem_set_domain_ioctl(struct drm_device *dev, void *data,
drm_gem_object_put(gobj);
up_read(&rdev->exclusive_lock);
- r = radeon_gem_handle_lockup(robj->rdev, r);
+ r = radeon_gem_handle_lockup(rdev, r);
return r;
}
--
2.34.1
WARNING: multiple messages have this Message-ID (diff)
From: Min Li <lm0963hack@gmail.com>
To: alexander.deucher@amd.com
Cc: Xinhui.Pan@amd.com, linux-kernel@vger.kernel.org,
amd-gfx@lists.freedesktop.org, sumit.semwal@linaro.org,
linaro-mm-sig@lists.linaro.org, dri-devel@lists.freedesktop.org,
daniel@ffwll.ch, airlied@gmail.com, christian.koenig@amd.com,
linux-media@vger.kernel.org
Subject: [PATCH] drm/radeon: fix race condition UAF in radeon_gem_set_domain_ioctl
Date: Fri, 26 May 2023 20:37:53 +0800 [thread overview]
Message-ID: <20230526123753.16160-1-lm0963hack@gmail.com> (raw)
Userspace can race to free the gobj(robj converted from), robj should not
be accessed again after drm_gem_object_put, otherwith it will result in
use-after-free.
Signed-off-by: Min Li <lm0963hack@gmail.com>
---
drivers/gpu/drm/radeon/radeon_gem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/radeon/radeon_gem.c b/drivers/gpu/drm/radeon/radeon_gem.c
index bdc5af23f005..450c7cbdd28a 100644
--- a/drivers/gpu/drm/radeon/radeon_gem.c
+++ b/drivers/gpu/drm/radeon/radeon_gem.c
@@ -478,7 +478,7 @@ int radeon_gem_set_domain_ioctl(struct drm_device *dev, void *data,
drm_gem_object_put(gobj);
up_read(&rdev->exclusive_lock);
- r = radeon_gem_handle_lockup(robj->rdev, r);
+ r = radeon_gem_handle_lockup(rdev, r);
return r;
}
--
2.34.1
next reply other threads:[~2023-05-27 7:55 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-26 12:37 Min Li [this message]
2023-05-26 12:37 ` [PATCH] drm/radeon: fix race condition UAF in radeon_gem_set_domain_ioctl Min Li
2023-05-26 12:37 ` Min Li
2023-05-27 11:06 ` kernel test robot
2023-05-27 11:06 ` kernel test robot
2023-05-27 11:06 ` kernel test robot
2023-05-27 16:12 ` kernel test robot
2023-05-27 16:12 ` kernel test robot
2023-05-27 16:12 ` kernel test robot
2023-06-01 14:34 ` Christian König
2023-06-01 14:34 ` Christian König
2023-06-01 14:34 ` Christian König
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