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Check-in [2b28e8d582]
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Overview
Comment:Add a test case to verify that the previous change avoids excess buffer overread in sqlite3VdbeRecordCompare().
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SHA1: 2b28e8d582cf10936fa1faca04a16ca2eeead66f
User & Date: drh 2014-03-26 15:05:56.169
Context
2014-03-26
16:22
Fix a potential buffer overread that could have occurred when searching a corrupt database file. (check-in: db2935473e user: drh tags: branch-3.8.4)
15:14
Add an extra test case for the potential buffer overread patched by [28ddecff04]. (check-in: f585f5d7a0 user: dan tags: trunk)
15:05
Add a test case to verify that the previous change avoids excess buffer overread in sqlite3VdbeRecordCompare(). (check-in: 2b28e8d582 user: drh tags: trunk)
14:51
Earlier detection of corruption in sqlite3VdbeRecordCompare() in order to avoid a potential buffer overread. (check-in: 28ddecff04 user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to test/corruptI.test.
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# Initialize the database.
#
do_execsql_test 1.1 {
  PRAGMA page_size=1024;
  PRAGMA auto_vacuum=0;
  CREATE TABLE t1(a);
  CREATE INDEX i1 ON t1(a);
  INSERT INTO t1 VALUES('a');
} {}
db close

do_test 1.2 {
  set offset [hexio_get_int [hexio_read test.db [expr 2*1024 + 8] 2]]
  set off [expr 2*1024 + $offset + 1]
  hexio_write test.db $off FF06









  sqlite3 db test.db
  catchsql { SELECT * FROM t1 WHERE a = 10 }
} {0 {}}


finish_test








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# Initialize the database.
#
do_execsql_test 1.1 {
  PRAGMA page_size=1024;
  PRAGMA auto_vacuum=0;
  CREATE TABLE t1(a);
  CREATE INDEX i1 ON t1(a);
  INSERT INTO t1 VALUES('abcdefghijklmnop');
} {}
db close

do_test 1.2 {
  set offset [hexio_get_int [hexio_read test.db [expr 2*1024 + 8] 2]]
  set off [expr 2*1024 + $offset + 1]
  hexio_write test.db $off 7f06
  sqlite3 db test.db
  catchsql { SELECT * FROM t1 WHERE a = 10 }
} {0 {}}

do_test 1.3 {
  db close
  set offset [hexio_get_int [hexio_read test.db [expr 2*1024 + 8] 2]]
  set off [expr 2*1024 + $offset + 1]
  hexio_write test.db $off FFFF7f02
  sqlite3 db test.db
  catchsql { SELECT * FROM t1 WHERE a = 10 }
} {0 {}}


finish_test