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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2016-10-12 09:22:27 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-19 22:17:58 +0300 |
| commit | d65146c7fb91797d14edcd092a07d4432688f7d5 (patch) | |
| tree | 3df756a16c971d64c605ad7a0a6b846edc61e41d /drivers/gpu/drm/savage/savage_state.c | |
| parent | c730a84aff6f3eca7dbe8b5e7bbc3cdd94418a54 (diff) | |
| download | linux-d65146c7fb91797d14edcd092a07d4432688f7d5.tar.xz | |
drm/savage: dereferencing an error pointer
commit f7741aa75e76440f4e9ecfe512feebe9bce33ca8 upstream.
A recent cleanup changed the kmalloc() + copy_from_user() to
memdup_user() but the error handling wasn't updated so we might call
kfree(-EFAULT) and crash.
Fixes: a6e3918bcdb1 ('GPU-DRM-Savage: Use memdup_user() rather than duplicating')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161012062227.GU12841@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/savage/savage_state.c')
| -rw-r--r-- | drivers/gpu/drm/savage/savage_state.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/savage/savage_state.c b/drivers/gpu/drm/savage/savage_state.c index 3dc0d8ff95ec..2db89bed52e8 100644 --- a/drivers/gpu/drm/savage/savage_state.c +++ b/drivers/gpu/drm/savage/savage_state.c @@ -1004,6 +1004,7 @@ int savage_bci_cmdbuf(struct drm_device *dev, void *data, struct drm_file *file_ kvb_addr = memdup_user(cmdbuf->vb_addr, cmdbuf->vb_size); if (IS_ERR(kvb_addr)) { ret = PTR_ERR(kvb_addr); + kvb_addr = NULL; goto done; } cmdbuf->vb_addr = kvb_addr; |