6.6-stable review patch. If anyone has any objections, please let me know.
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From: Ma Ke make24@iscas.ac.cn
commit 66edf3fb331b6c55439b10f9862987b0916b3726 upstream.
In nv17_tv_get_ld_modes(), the return value of drm_mode_duplicate() is assigned to mode, which will lead to a possible NULL pointer dereference on failure of drm_mode_duplicate(). Add a check to avoid npd.
Cc: stable@vger.kernel.org Signed-off-by: Ma Ke make24@iscas.ac.cn Signed-off-by: Lyude Paul lyude@redhat.com Link: https://patchwork.freedesktop.org/patch/msgid/20240625081828.2620794-1-make2... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/nouveau/dispnv04/tvnv17.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c +++ b/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c @@ -209,6 +209,8 @@ static int nv17_tv_get_ld_modes(struct d struct drm_display_mode *mode;
mode = drm_mode_duplicate(encoder->dev, tv_mode); + if (!mode) + continue;
mode->clock = tv_norm->tv_enc_mode.vrefresh * mode->htotal / 1000 *