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libbacktrace: fix UBSAN issues (5aa9254)

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Bartosz Taudul 2024-08-24 18:01:10 +02:00
parent ef21f5867e
commit 12c8592325
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GPG Key ID: B7FE2008B7575DF3
1 changed files with 20 additions and 20 deletions
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40
public/libbacktrace/elf.cpp
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@ -5705,10 +5705,10 @@ elf_uncompress_lzma_block (const unsigned char *compressed,
/* Block header CRC. */ /* Block header CRC. */
computed_crc = elf_crc32 (0, compressed + block_header_offset, computed_crc = elf_crc32 (0, compressed + block_header_offset,
block_header_size - 4); block_header_size - 4);
stream_crc = (compressed[off] stream_crc = ((uint32_t)compressed[off]
| (compressed[off + 1] << 8) | ((uint32_t)compressed[off + 1] << 8)
| (compressed[off + 2] << 16) | ((uint32_t)compressed[off + 2] << 16)
| (compressed[off + 3] << 24)); | ((uint32_t)compressed[off + 3] << 24));
if (unlikely (computed_crc != stream_crc)) if (unlikely (computed_crc != stream_crc))
{ {
elf_uncompress_failed (); elf_uncompress_failed ();
@ -6215,10 +6215,10 @@ elf_uncompress_lzma_block (const unsigned char *compressed,
return 0; return 0;
} }
computed_crc = elf_crc32 (0, uncompressed, uncompressed_offset); computed_crc = elf_crc32 (0, uncompressed, uncompressed_offset);
stream_crc = (compressed[off] stream_crc = ((uint32_t)compressed[off]
| (compressed[off + 1] << 8) | ((uint32_t)compressed[off + 1] << 8)
| (compressed[off + 2] << 16) | ((uint32_t)compressed[off + 2] << 16)
| (compressed[off + 3] << 24)); | ((uint32_t)compressed[off + 3] << 24));
if (computed_crc != stream_crc) if (computed_crc != stream_crc)
{ {
elf_uncompress_failed (); elf_uncompress_failed ();
@ -6318,10 +6318,10 @@ elf_uncompress_lzma (struct backtrace_state *state,
/* Next comes a CRC of the stream flags. */ /* Next comes a CRC of the stream flags. */
computed_crc = elf_crc32 (0, compressed + 6, 2); computed_crc = elf_crc32 (0, compressed + 6, 2);
stream_crc = (compressed[8] stream_crc = ((uint32_t)compressed[8]
| (compressed[9] << 8) | ((uint32_t)compressed[9] << 8)
| (compressed[10] << 16) | ((uint32_t)compressed[10] << 16)
| (compressed[11] << 24)); | ((uint32_t)compressed[11] << 24));
if (unlikely (computed_crc != stream_crc)) if (unlikely (computed_crc != stream_crc))
{ {
elf_uncompress_failed (); elf_uncompress_failed ();
@ -6362,10 +6362,10 @@ elf_uncompress_lzma (struct backtrace_state *state,
/* Before that is a footer CRC. */ /* Before that is a footer CRC. */
computed_crc = elf_crc32 (0, compressed + offset, 6); computed_crc = elf_crc32 (0, compressed + offset, 6);
stream_crc = (compressed[offset - 4] stream_crc = ((uint32_t)compressed[offset - 4]
| (compressed[offset - 3] << 8) | ((uint32_t)compressed[offset - 3] << 8)
| (compressed[offset - 2] << 16) | ((uint32_t)compressed[offset - 2] << 16)
| (compressed[offset - 1] << 24)); | ((uint32_t)compressed[offset - 1] << 24));
if (unlikely (computed_crc != stream_crc)) if (unlikely (computed_crc != stream_crc))
{ {
elf_uncompress_failed (); elf_uncompress_failed ();
@ -6421,10 +6421,10 @@ elf_uncompress_lzma (struct backtrace_state *state,
/* Next is a CRC of the index. */ /* Next is a CRC of the index. */
computed_crc = elf_crc32 (0, compressed + index_offset, computed_crc = elf_crc32 (0, compressed + index_offset,
offset - index_offset); offset - index_offset);
stream_crc = (compressed[offset] stream_crc = ((uint32_t)compressed[offset]
| (compressed[offset + 1] << 8) | ((uint32_t)compressed[offset + 1] << 8)
| (compressed[offset + 2] << 16) | ((uint32_t)compressed[offset + 2] << 16)
| (compressed[offset + 3] << 24)); | ((uint32_t)compressed[offset + 3] << 24));
if (unlikely (computed_crc != stream_crc)) if (unlikely (computed_crc != stream_crc))
{ {
elf_uncompress_failed (); elf_uncompress_failed ();