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Fix race condition in GIF emotion switching causing crash (#1848)

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* Initial plan

* Fix GIF emotion switching crash: hide emoji_image_ before destroying gif_controller_

The crash was caused by a race condition in SetEmotion() where two separate
DisplayLockGuard scopes allowed the LVGL render task to access freed GIF image
data between lock scopes. By hiding emoji_image_ before destroying
gif_controller_ in the same lock scope, LVGL won't try to render the image
with freed data during the gap.

Co-authored-by: 78 <4488133+78@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: 78 <4488133+78@users.noreply.github.com>
This commit is contained in:
Copilot
2026-03-15 22:14:02 +08:00
committed by GitHub
parent bbd5f70c3c
commit 564e929aea
1 changed files with 5 additions and 0 deletions
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5
main/display/lcd_display.cc
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@ -1079,6 +1079,11 @@ void LcdDisplay::SetEmotion(const char* emotion) {
if (gif_controller_) {
DisplayLockGuard lock(this);
gif_controller_->Stop();
// Hide image before destroying GIF controller to prevent LVGL from
// accessing freed image data during rendering between lock scopes
if (emoji_image_) {
lv_obj_add_flag(emoji_image_, LV_OBJ_FLAG_HIDDEN);
}
gif_controller_.reset();
}