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  1. WiredTiger
  2. WT-1800

LZ4 segfault while salvaging

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    Details

    • Type: Task
    • Status: Closed
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
    • Labels:

      Description

      test/format triggered a segfault in the LZ4 library. Stack trace:

      ==5692==ERROR: AddressSanitizer: SEGV on unknown address 0x7f8c539c5a60 (pc 0x7f8c579fdb73 sp 0x7ffe6f610320 bp 0x7f8c539cd4da T0)
          #0 0x7f8c579fdb72 (/lib64/liblz4.so.1+0x4b72)
          WT-1 0x7f8c53dfca45 in wt_lz4_decompress ext/compressors/lz4/lz4_compress.c:146
          WT-2 0x95acb1 in __wt_bt_read src/btree/bt_io.c:71
          WT-3 0x9a4740 in __slvg_read src/btree/bt_slvg.c:396
          WT-4 0x9a10ed in __wt_bt_salvage src/btree/bt_slvg.c:201
          WT-5 0x8320cc in __wt_salvage src/session/session_salvage.c:43
          WT-6 0x7ef75b in __wt_schema_worker src/schema/schema_worker.c:60
          WT-7 0x7f1a7e in __wt_schema_worker src/schema/schema_worker.c:106
          WT-8 0x80e591 in __session_salvage src/session/session_api.c:551
          WT-9 0x4cc62e in salvage test/format/salvage.c:47
          WT-10 0x4cc1b4 in wts_salvage test/format/salvage.c:177
          WT-11 0x4cf111 in main test/format/t.c:234
          WT-12 0x37cda21d64 in __libc_start_main (/lib64/libc.so.6+0x37cda21d64)
          WT-13 0x4a418c in _start (/home/jenkins/jenkins/workspace/wiredtiger-test-format-stress-sanitizer/build_posix/test/format/t+0x4a418c)
      

      Configuration:

      ############################################
      #  RUN PARAMETERS
      ############################################
      abort=0
      auto_throttle=1
      firstfit=0
      bitcnt=8
      bloom=1
      bloom_bit_count=18
      bloom_hash_count=22
      bloom_oldest=1
      cache=31
      checkpoints=0
      checksum=uncompressed
      chunk_size=7
      compaction=0
      compression=lz4
      data_extend=0
      data_source=table
      delete_pct=36
      dictionary=0
      evict_max=2
      file_type=row-store
      backups=0
      huffman_key=0
      huffman_value=0
      insert_pct=28
      internal_key_truncation=1
      internal_page_max=12
      isolation=random
      key_gap=3
      key_max=93
      key_min=19
      leak_memory=0
      leaf_page_max=17
      logging=0
      logging_archive=1
      logging_prealloc=1
      lsm_worker_threads=4
      merge_max=15
      mmap=1
      ops=100000
      prefix_compression=1
      prefix_compression_min=7
      repeat_data_pct=60
      reverse=0
      rows=100000
      runs=1
      split_pct=77
      statistics=1
      statistics_server=0
      threads=15
      timer=20
      value_max=1471
      value_min=8
      wiredtiger_config=
      write_pct=53
      ############################################
      

      Maybe we need to use the decompress_safe API rather than the decompress_fast API (https://github.com/Cyan4973/lz4/blob/master/lib/lz4.h)? in LZ4 to avoid this?

      Failure:

      http://build.wiredtiger.com:8080/job/wiredtiger-test-format-stress-sanitizer/2995/console

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              • Assignee:
                Unassigned
                Reporter:
                alexander.gorrod Alexander Gorrod
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                • Created:
                  Updated:
                  Resolved: