diff options
Diffstat (limited to 'queue-6.12/drm-tegra-fix-a-possible-null-pointer-dereference.patch')
| -rw-r--r-- | queue-6.12/drm-tegra-fix-a-possible-null-pointer-dereference.patch | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/queue-6.12/drm-tegra-fix-a-possible-null-pointer-dereference.patch b/queue-6.12/drm-tegra-fix-a-possible-null-pointer-dereference.patch new file mode 100644 index 0000000000..1b49176f20 --- /dev/null +++ b/queue-6.12/drm-tegra-fix-a-possible-null-pointer-dereference.patch @@ -0,0 +1,37 @@ +From 780351a5f61416ed2ba1199cc57e4a076fca644d Mon Sep 17 00:00:00 2001 +From: Qiu-ji Chen <chenqiuji666@gmail.com> +Date: Wed, 6 Nov 2024 17:59:06 +0800 +Subject: drm/tegra: Fix a possible null pointer dereference + +From: Qiu-ji Chen <chenqiuji666@gmail.com> + +commit 780351a5f61416ed2ba1199cc57e4a076fca644d upstream. + +In tegra_crtc_reset(), new memory is allocated with kzalloc(), but +no check is performed. Before calling __drm_atomic_helper_crtc_reset, +state should be checked to prevent possible null pointer dereference. + +Fixes: b7e0b04ae450 ("drm/tegra: Convert to using __drm_atomic_helper_crtc_reset() for reset.") +Cc: stable@vger.kernel.org +Signed-off-by: Qiu-ji Chen <chenqiuji666@gmail.com> +Signed-off-by: Thierry Reding <treding@nvidia.com> +Link: https://lore.kernel.org/r/20241106095906.15247-1-chenqiuji666@gmail.com +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + drivers/gpu/drm/tegra/dc.c | 5 ++++- + 1 file changed, 4 insertions(+), 1 deletion(-) + +--- a/drivers/gpu/drm/tegra/dc.c ++++ b/drivers/gpu/drm/tegra/dc.c +@@ -1392,7 +1392,10 @@ static void tegra_crtc_reset(struct drm_ + if (crtc->state) + tegra_crtc_atomic_destroy_state(crtc, crtc->state); + +- __drm_atomic_helper_crtc_reset(crtc, &state->base); ++ if (state) ++ __drm_atomic_helper_crtc_reset(crtc, &state->base); ++ else ++ __drm_atomic_helper_crtc_reset(crtc, NULL); + } + + static struct drm_crtc_state * |