Commit 110d8d6dcafaed517e8f77a6253169535ee3a20e
2020-12-07T11:12:49
decompress_smooth_data(): Fix another uninit. read Regression introduced by 42825b68d570fb07fe820ac62ad91017e61e9a25 The test case https://user-images.githubusercontent.com/3491627/101376530-fde56180-38b0-11eb-938d-734119a5b5ba.jpg is a malformed progressive JPEG image containing an interleaved Y/Cb/Cr DC scan followed by two non-interleaved Y DC scans. Thus, the prev_coef_bits[] array was initialized for the Y component but not the other components, the uninitialized values for Cb and Cr were transferred to the prev_coef_bits_latch[] array in smoothing_ok(), and because cinfo->master->last_good_iMCU_row was 0, decompress_smooth_data() read those uninitialized values when attempting to smooth the second iMCU row. Possibly fixes #478