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https://github.com/Divested-Mobile/DivestOS-Build.git
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32 lines
1.2 KiB
Diff
32 lines
1.2 KiB
Diff
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From 7a86f369594a0b6567820b77d441e778e6adb8a7 Mon Sep 17 00:00:00 2001
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From: Rajkumar Subbiah <rsubbia@codeaurora.org>
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Date: Mon, 15 May 2017 15:17:14 -0400
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Subject: [PATCH] msm: mdss: Fix potential dereferencing of null pointer
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During atomic commit on a writeback panel, there is a possibility
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of deferencing a NULL pointer if the configuration changes before
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the commit. This change adds a NULL pointer check to avoid it.
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Bug: 36731152
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Change-Id: I56d0efad40992b6f87c81e5eab93cf0f24f6f524
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Signed-off-by: Rajkumar Subbiah <rsubbia@codeaurora.org>
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---
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drivers/video/msm/mdss/mdss_fb.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/drivers/video/msm/mdss/mdss_fb.c b/drivers/video/msm/mdss/mdss_fb.c
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index 86f380e8a845b..8e02cbf782e0f 100644
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--- a/drivers/video/msm/mdss/mdss_fb.c
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+++ b/drivers/video/msm/mdss/mdss_fb.c
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@@ -3302,6 +3302,10 @@ int mdss_fb_atomic_commit(struct fb_info *info,
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MSMFB_ATOMIC_COMMIT, true, false);
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if (mfd->panel.type == WRITEBACK_PANEL) {
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output_layer = commit_v1->output_layer;
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+ if (!output_layer) {
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+ pr_err("Output layer is null\n");
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+ goto end;
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+ }
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wb_change = !mdss_fb_is_wb_config_same(mfd,
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commit_v1->output_layer);
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if (wb_change) {
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