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==20731==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7fffdc1b4894 at pc 0xef3ad5 bp 0x7fffdc1afb90 sp 0x7fffdc1afb88
READ of size 1 at 0x7fffdc1b4894 thread T0
    #0 0xef3ad4 in XLogInsert /home/kgrittn/pg/master/src/backend/access/transam/xlog.c:1040
    #1 0xd57472 in doPickSplit /home/kgrittn/pg/master/src/backend/access/spgist/spgdoinsert.c:1391
    #2 0xd116d1 in spgdoinsert /home/kgrittn/pg/master/src/backend/access/spgist/spgdoinsert.c:2008
    #3 0xcbf1b1 in spginsert /home/kgrittn/pg/master/src/backend/access/spgist/spginsert.c:238
    #4 0x46d8c23 in FunctionCall6Coll /home/kgrittn/pg/master/src/backend/utils/fmgr/fmgr.c:1436
    #5 0xad80db in index_insert /home/kgrittn/pg/master/src/backend/access/index/indexam.c:223
    #6 0x211c4fd in ExecInsertIndexTuples /home/kgrittn/pg/master/src/backend/executor/execUtils.c:1104
    #7 0x227d66f in ExecInsert /home/kgrittn/pg/master/src/backend/executor/nodeModifyTable.c:274
    #8 0x22790d8 in ExecModifyTable /home/kgrittn/pg/master/src/backend/executor/nodeModifyTable.c:1014
    #9 0x2020033 in ExecProcNode /home/kgrittn/pg/master/src/backend/executor/execProcnode.c:377
    #10 0x1fe8a64 in ExecutePlan /home/kgrittn/pg/master/src/backend/executor/execMain.c:1474
    #11 0x1fe79b8 in standard_ExecutorRun /home/kgrittn/pg/master/src/backend/executor/execMain.c:308
    #12 0x1fe5d19 in ExecutorRun /home/kgrittn/pg/master/src/backend/executor/execMain.c:256
    #13 0x34d909b in ProcessQuery /home/kgrittn/pg/master/src/backend/tcop/pquery.c:185
    #14 0x34d172a in PortalRunMulti /home/kgrittn/pg/master/src/backend/tcop/pquery.c:1279
    #15 0x34ca68c in PortalRun /home/kgrittn/pg/master/src/backend/tcop/pquery.c:816
    #16 0x349f211 in exec_simple_query /home/kgrittn/pg/master/src/backend/tcop/postgres.c:1048
    #17 0x3499f10 in PostgresMain /home/kgrittn/pg/master/src/backend/tcop/postgres.c:3992
    #18 0x2f087f5 in BackendRun /home/kgrittn/pg/master/src/backend/postmaster/postmaster.c:4085
    #19 0x2f04700 in BackendStartup /home/kgrittn/pg/master/src/backend/postmaster/postmaster.c:3774
    #20 0x2ee5b66 in ServerLoop /home/kgrittn/pg/master/src/backend/postmaster/postmaster.c:1585
    #21 0x2eda2be in PostmasterMain /home/kgrittn/pg/master/src/backend/postmaster/postmaster.c:1240
    #22 0x24cd113 in main /home/kgrittn/pg/master/src/backend/main/main.c:196
    #23 0x2b8189ec376c in __libc_start_main /build/buildd/eglibc-2.15/csu/libc-start.c:226
    #24 0x4dc32c in _start ??:?

Address 0x7fffdc1b4894 is located in stack of thread T0 at offset 2644 in frame
    #0 0xd2f2cf in doPickSplit /home/kgrittn/pg/master/src/backend/access/spgist/spgdoinsert.c:680

  This frame has 57 object(s):
    [32, 40) ''
    [96, 104) ''
    [160, 168) ''
    [224, 232) ''
    [288, 296) ''
    [352, 356) ''
    [416, 417) ''
    [480, 481) ''
    [544, 545) 'insertedNew'
    [608, 632) 'in'
    [672, 720) 'out'
    [768, 776) 'procinfo'
    [832, 833) 'includeNew'
    [896, 900) 'i'
    [960, 964) 'max'
    [1024, 1028) 'n'
    [1088, 1096) 'innerTuple'
    [1152, 1160) 'node'
    [1216, 1224) 'nodes'
    [1280, 1284) 'newInnerBuffer'
    [1344, 1348) 'newLeafBuffer'
    [1408, 1416) 'heapPtrs'
    [1472, 1480) 'leafPageSelect'
    [1536, 1544) 'leafSizes'
    [1600, 1608) 'toDelete'
    [1664, 1672) 'toInsert'
    [1728, 1730) 'redirectTuplePos'
    [1792, 1796) 'startOffsets'
    [1856, 1864) 'newLeafs'
    [1920, 1924) 'spaceToDelete'
    [1984, 1988) 'currentFreeSpace'
    [2048, 2052) 'totalLeafSizes'
    [2112, 2113) 'allTheSame'
    [2176, 2496) 'rdata'
    [2528, 2532) 'nRdata'
    [2592, 2644) 'xlrec' <== Memory access at offset 2644 overflows this variable
    [2688, 2696) 'leafdata'
    [2752, 2760) 'leafptr'
    [2816, 2840) 'saveCurrent'
    [2880, 2884) 'nToDelete'
    [2944, 2948) 'nToInsert'
    [3008, 3012) 'maxToInclude'
    [3072, 3080) 'it'
    [3136, 3144) 'it1'
    [3200, 3208) 'label'
    [3264, 3265) 'labelisnull'
    [3328, 3336) 'nodePageSelect'
    [3392, 3396) 'curspace'
    [3456, 3460) 'newspace'
    [3520, 3524) 'nodeOfNewTuple'
    [3584, 3592) 'it2'
    [3648, 3652) 'leafBuffer'
    [3712, 3716) 'leafBlock'
    [3776, 3778) 'newoffset'
    [3840, 3848) 'recptr'
    [3904, 3912) 'page'
    [3968, 3976) 'page3'
HINT: this may be a false positive if your program uses some custom stack unwind mechanism or swapcontext
      (longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-buffer-overflow ??:0 ??
Shadow bytes around the buggy address:
  0x10007b82e8c0: 04 f4 f4 f4 f2 f2 f2 f2 04 f4 f4 f4 f2 f2 f2 f2
  0x10007b82e8d0: 01 f4 f4 f4 f2 f2 f2 f2 00 00 00 00 00 00 00 00
  0x10007b82e8e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x10007b82e8f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x10007b82e900: f2 f2 f2 f2 04 f4 f4 f4 f2 f2 f2 f2 00 00 00 00
=>0x10007b82e910: 00 00[04]f4 f2 f2 f2 f2 00 f4 f4 f4 f2 f2 f2 f2
  0x10007b82e920: 00 f4 f4 f4 f2 f2 f2 f2 00 00 00 f4 f2 f2 f2 f2
  0x10007b82e930: 04 f4 f4 f4 f2 f2 f2 f2 04 f4 f4 f4 f2 f2 f2 f2
  0x10007b82e940: 04 f4 f4 f4 f2 f2 f2 f2 00 f4 f4 f4 f2 f2 f2 f2
  0x10007b82e950: 00 f4 f4 f4 f2 f2 f2 f2 00 f4 f4 f4 f2 f2 f2 f2
  0x10007b82e960: 01 f4 f4 f4 f2 f2 f2 f2 00 f4 f4 f4 f2 f2 f2 f2
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07
  Heap left redzone:     fa
  Heap right redzone:    fb
  Freed heap region:     fd
  Stack left redzone:    f1
  Stack mid redzone:     f2
  Stack right redzone:   f3
  Stack partial redzone: f4
  Stack after return:    f5
  Stack use after scope: f8
  Global redzone:        f9
  Global init order:     f6
  Poisoned by user:      f7
  ASan internal:         fe
==20731==ABORTING