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disp: msm: dsi: Nullify display modes after kfree

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The 'display->modes' pointer must be set to NULL immediately
after calling kfree on it to prevent potential double-free
vulnerabilities or use-after-free issues.

This change ensures robust memory management by clearing the
pointer to previously freed memory, aligning with best practices
for kernel memory deallocation.

Change-Id: I4fd939bc6ee5f3d9c506f0c311a9400f366e7fd2
Signed-off-by: Vedant Yevale <vyevale@qti.qualcomm.com>
(cherry picked from commit 1d3c5a477ea8f6aca1158209e1b87209c21c61f5)
This commit is contained in:
Vedant Yevale 2025-08-22 14:32:54 +05:30 • committed by Alexander Winkowski
commit 8c29510d44
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1 changed files with 3 additions and 1 deletions
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4
techpack/display/msm/dsi/dsi_display.c
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@ -7168,8 +7168,10 @@ exit:
rc = 0;
error:
if (rc)
if (rc) {
kfree(display->modes);
display->modes = NULL;
}
mutex_unlock(&display->display_lock);
return rc;