diff options
| -rw-r--r-- | absl/debugging/symbolize_elf.inc | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/absl/debugging/symbolize_elf.inc b/absl/debugging/symbolize_elf.inc index 5d6c8df3..fa401ae8 100644 --- a/absl/debugging/symbolize_elf.inc +++ b/absl/debugging/symbolize_elf.inc @@ -489,6 +489,13 @@ static ABSL_ATTRIBUTE_NOINLINE bool GetSectionHeaderByType( (buf_bytes > num_bytes_left) ? num_bytes_left : buf_bytes; const off_t offset = sh_offset + i * sizeof(buf[0]); const ssize_t len = ReadFromOffset(fd, buf, num_bytes_to_read, offset); + if (len < 0) { + ABSL_RAW_LOG( + WARNING, + "Reading %zd bytes from offset %ju returned %zd which is negative.", + num_bytes_to_read, static_cast<intmax_t>(offset), len); + return false; + } if (len % sizeof(buf[0]) != 0) { ABSL_RAW_LOG( WARNING, @@ -693,6 +700,7 @@ static ABSL_ATTRIBUTE_NOINLINE FindSymbolResult FindSymbol( const int entries_in_chunk = std::min(num_remaining_symbols, buf_entries); const int bytes_in_chunk = entries_in_chunk * sizeof(buf[0]); const ssize_t len = ReadFromOffset(fd, buf, bytes_in_chunk, offset); + SAFE_ASSERT(len >= 0); SAFE_ASSERT(len % sizeof(buf[0]) == 0); const ssize_t num_symbols_in_buf = len / sizeof(buf[0]); SAFE_ASSERT(num_symbols_in_buf <= entries_in_chunk); |