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reject out-of-range marker codes in jpegli_save_markers #255

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reject out-of-range marker codes in jpegli_save_markers #255

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2 changes: 1 addition & 1 deletion lib/jpegli/decode.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -597,7 +597,7 @@ void jpegli_save_markers(j_decompress_ptr cinfo, int marker_code,
unsigned int length_limit) {
// TODO(szabadka) Limit our memory usage by taking into account length_limit.
jpeg_decomp_master* m = cinfo->master;
if (marker_code < 0xe0) {
if (marker_code < 0xe0 || marker_code > 0xff) {
JPEGLI_ERROR("jpegli_save_markers: invalid marker code %d", marker_code);
}
m->markers_to_save_[marker_code - 0xe0] = 1;
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12 changes: 12 additions & 0 deletions lib/jpegli/error_handling_test.cc
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Expand Up @@ -1078,6 +1078,18 @@ TEST(DecoderErrorHandlingTest, MinimalSuccess) {
jpegli_destroy_decompress(&cinfo);
}

TEST(DecoderErrorHandlingTest, InvalidSaveMarkersCode) {
jpeg_decompress_struct cinfo = {};
const auto try_catch_block = [&]() -> bool {
ERROR_HANDLER_SETUP(jpegli);
jpegli_create_decompress(&cinfo);
jpegli_save_markers(&cinfo, 0x100, 0xffff);
return true;
};
EXPECT_FALSE(try_catch_block());
jpegli_destroy_decompress(&cinfo);
}

TEST(DecoderErrorHandlingTest, NoSource) {
jpeg_decompress_struct cinfo = {};
const auto try_catch_block = [&]() -> bool {
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