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  1. WiredTiger
  2. WT-5859

Fix a seg fault in verification

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    • Story Points:
      5
    • Sprint:
      Storage Engines 2020-03-23

      Description

      While testing backup, I hit a segfault in the verify addr code. wt_addr_string assumes the buffer it is passed is non-NULL and the path I see is sending in NULL.
      Here's the stack:

      (gdb) bt
      #0  0x000000000041f4a6 in __wt_addr_string (session=0x7f918002b230, addr=0x0, addr_size=0, buf=0x0) at ../src/btree/bt_misc.c:24
      #1  0x0000000000585943 in __verify_addr_string (session=0x7f918002b230, ref=0x7f9180067118, buf=0x7f918006e780) at ../src/btree/bt_vrfy.c:537
      #2  0x000000000058754b in __verify_ts_addr_cmp (session=0x7f918002b230, ref=0x7f9180067118, cell_num=0, ts1_name=0x63cbd9 "newest durable", 
          ts1=48947, ts2_name=0x63cbd9 "newest durable", ts2=48940, gt=false, vs=0x7f91967fb250) at ../src/btree/bt_vrfy.c:1079
      #3  0x0000000000587e09 in __verify_page_cell (session=0x7f918002b230, ref=0x7f9180067118, addr_unpack=0x7f91967fb8f0, vs=0x7f91967fb250)
          at ../src/btree/bt_vrfy.c:1265
      #4  0x00000000005868ca in __verify_tree (session=0x7f918002b230, ref=0x7f9180067118, addr_unpack=0x7f91967fb8f0, vs=0x7f91967fb250)
          at ../src/btree/bt_vrfy.c:868
      #5  0x000000000058552a in __wt_verify (session=0x7f918002b230, cfg=0x7f91967fbb70) at ../src/btree/bt_vrfy.c:446
      #6  0x00000000004c50d5 in __wt_exclusive_handle_operation (session=0x7f918002b230, uri=0x7f9180022220 "file:wt.wt", 
          file_func=0x584f5c <__wt_verify>, cfg=0x7f91967fbb70, open_flags=2097168) at ../src/schema/schema_worker.c:32
      #7  0x00000000004c51ef in __wt_schema_worker (session=0x7f918002b230, uri=0x7f9180022220 "file:wt.wt", file_func=0x584f5c <__wt_verify>, 
          name_func=0x0, cfg=0x7f91967fbb70, open_flags=2097168) at ../src/schema/schema_worker.c:70
      #8  0x00000000004c5490 in __wt_schema_worker (session=0x7f918002b230, uri=0x14ae5f0 "table:wt", file_func=0x584f5c <__wt_verify>, name_func=0x0, 
          cfg=0x7f91967fbb70, open_flags=2097168) at ../src/schema/schema_worker.c:100
      #9  0x00000000004d58d1 in __session_verify (wt_session=0x7f918002b230, uri=0x14ae5f0 "table:wt", config=0x0) at ../src/session/session_api.c:1596
      

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            Assignee:
            chenhao.qu Chenhao Qu
            Reporter:
            sue.loverso Susan LoVerso
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              Created:
              Updated:
              Resolved: