diff options
| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2023-12-05 16:06:31 +0300 |
|---|---|---|
| committer | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2023-12-07 13:29:17 +0300 |
| commit | 76385d493c2137460ee7735a5d3a494099c35188 (patch) | |
| tree | 7cd24078f3791888bf6af6cbf01e21711e417950 /drivers/gpu/drm/drm_debugfs.c | |
| parent | 812cc1da7ffd9e178ef66b8a22113be10fba466c (diff) | |
| download | linux-76385d493c2137460ee7735a5d3a494099c35188.tar.xz | |
drm/debugfs: fix potential NULL pointer dereference
encoder->funcs entry might be NULL, so check it first before calling its
methods. This fixes NULL pointer dereference observed on Rasberry Pi
3b/4b boards.
Fixes: caf525ed45b4 ("drm/encoder: register per-encoder debugfs dir")
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231205130631.3456986-1-m.szyprowski@samsung.com
Diffstat (limited to 'drivers/gpu/drm/drm_debugfs.c')
| -rw-r--r-- | drivers/gpu/drm/drm_debugfs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c index 02e7481758c0..f4715a67e340 100644 --- a/drivers/gpu/drm/drm_debugfs.c +++ b/drivers/gpu/drm/drm_debugfs.c @@ -638,7 +638,7 @@ void drm_debugfs_encoder_add(struct drm_encoder *encoder) debugfs_create_file("bridges", 0444, root, encoder, &bridges_fops); - if (encoder->funcs->debugfs_init) + if (encoder->funcs && encoder->funcs->debugfs_init) encoder->funcs->debugfs_init(encoder, root); } |