diff options
| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2017-05-12 14:38:03 +0200 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2017-06-12 17:11:39 -0700 |
| commit | d0b1d259a4b58b21a21ea82d7174bf7ea825e9cc (patch) | |
| tree | 478890f4ecd797fd31e89b1e8b7b66e00f3f5801 /drivers/gpu | |
| parent | 24bb206f32cdaa76c59444b62be51708dc16fbe8 (diff) | |
drm/vc4: Fix resource leak in 'vc4_get_hang_state_ioctl()' in error handling path
If one 'drm_gem_handle_create()' fails, we leak somes handles and some
memory.
In order to fix it:
- move the 'free(bo_state)' at the end of the function so that it is also
called in the eror handling path. This has the side effect to also try
to free it if the first 'kcalloc' fails. This is harmless.
- add a new label, err_delete_handle, in order to delete already
allocated handles in error handling path
- remove the now useless 'err' label
The way the code is now written will also delete the handles if the
'copy_to_user()' call fails.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Eric Anholt <eric@anholt.net>
Link: http://patchwork.freedesktop.org/patch/msgid/20170512123803.1886-1-christophe.jaillet@wanadoo.fr
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_gem.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_gem.c b/drivers/gpu/drm/vc4/vc4_gem.c index 9dc7646d49ed..d5b821ad06af 100644 --- a/drivers/gpu/drm/vc4/vc4_gem.c +++ b/drivers/gpu/drm/vc4/vc4_gem.c @@ -111,8 +111,8 @@ vc4_get_hang_state_ioctl(struct drm_device *dev, void *data, &handle); if (ret) { - state->bo_count = i - 1; - goto err; + state->bo_count = i; + goto err_delete_handle; } bo_state[i].handle = handle; bo_state[i].paddr = vc4_bo->base.paddr; @@ -124,13 +124,16 @@ vc4_get_hang_state_ioctl(struct drm_device *dev, void *data, state->bo_count * sizeof(*bo_state))) ret = -EFAULT; - kfree(bo_state); +err_delete_handle: + if (ret) { + for (i = 0; i < state->bo_count; i++) + drm_gem_handle_delete(file_priv, bo_state[i].handle); + } err_free: - vc4_free_hang_state(dev, kernel_state); + kfree(bo_state); -err: return ret; } |