18 lines
687 B
Diff
18 lines
687 B
Diff
diff --git a/third_party/libopenjpeg20/j2k.c b/third_party/libopenjpeg20/j2k.c
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index ad6e1b86f..bf1cb4f36 100644
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--- a/third_party/libopenjpeg20/j2k.c
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+++ b/third_party/libopenjpeg20/j2k.c
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@@ -9086,6 +9086,12 @@ static OPJ_BOOL opj_j2k_update_image_data(opj_tcd_t * p_tcd,
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* */
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assert(res_x0 >= 0);
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assert(res_x1 >= 0);
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+
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+ /* Prevent bad casting to unsigned values in the subsequent lines. */
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+ if ( res_x0 < 0 || res_x1 < 0 || res_y0 < 0 || res_y1 < 0 ) {
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+ return OPJ_FALSE;
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+ }
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+
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if (l_x0_dest < (OPJ_UINT32)res_x0) {
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l_start_x_dest = (OPJ_UINT32)res_x0 - l_x0_dest;
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l_offset_x0_src = 0;
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