database/sqlite
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Fix a crash in the sqlite_dbdata module that could occur if a pointer within an overflow chain in a corrupt database pointed past the end of the db.

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FossilOrigin-Name: 3eae4e301e3e4bcf14e96066f77be1434c5d4b3daadb10153cd36382589ac128
This commit is contained in:
dan
2019-05-09 17:54:27 +00:00
parent 6bab6f2b4d
commit 4d2175613f
3 changed files with 10 additions and 9 deletions
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3
ext/misc/dbdata.c
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@ -587,8 +587,9 @@ static int dbdataNext(sqlite3_vtab_cursor *pCursor){
int nOvfl = 0;
int nCopy;
rc = dbdataLoadPage(pCsr, pgnoOvfl, &aOvfl, &nOvfl);
assert( rc!=SQLITE_OK || nOvfl==pCsr->nPage );
assert( rc!=SQLITE_OK || aOvfl==0 || nOvfl==pCsr->nPage );
if( rc!=SQLITE_OK ) return rc;
if( aOvfl==0 ) break;
nCopy = U-4;
if( nCopy>nRem ) nCopy = nRem;

14
manifest
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@ -1,5 +1,5 @@
C Disable\sthe\soptimization\swhere\sa\sREAL\svalue\swith\sno\sfractional\spart\nis\sstored\sas\san\sINTEGER\swhen\sthe\sinteger\suses\sas\smuch\sspace\sas\sthe\sreal\nvalue\sit\sproposes\sto\sstand\sin\sfor\s(8\sbytes).\s\sThis\savoids\scorner\scases\nof\scomparing\sintegers\sagainst\sreal\svalues\sthat\sare\sbeyond\sthe\sresolution\nof\san\sIEEE\s754\sdouble.\s\sFix\sfor\sticket\s[6c1d3febc00b22d457c78c2]
D 2019-05-09T17:10:30.104
C Fix\sa\scrash\sin\sthe\ssqlite_dbdata\smodule\sthat\scould\soccur\sif\sa\spointer\swithin\san\soverflow\schain\sin\sa\scorrupt\sdatabase\spointed\spast\sthe\send\sof\sthe\sdb.
D 2019-05-09T17:54:27.219
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@ -284,7 +284,7 @@ F ext/misc/closure.c dbfd8543b2a017ae6b1a5843986b22ddf99ff126ec9634a2f4047cd14c8
F ext/misc/completion.c cec672d40604075bb341a7f11ac48393efdcd90a979269b8fe7977ea62d0547f
F ext/misc/compress.c dd4f8a6d0baccff3c694757db5b430f3bbd821d8686d1fc24df55cf9f035b189
F ext/misc/csv.c 7f047aeb68f5802e7ce6639292095d622a488bb43526ed04810e0649faa71ceb
F ext/misc/dbdata.c e2b007604b58a6f2d10b247c4b381cab1d20a530165bc49474b11e48fe680877
F ext/misc/dbdata.c 4b73a0a5218a411752441896b68252ba3ced4d452e7dd419fdb3b92ae6ecada0
F ext/misc/dbdump.c baf6e37447c9d6968417b1cd34cbedb0b0ab3f91b5329501d8a8d5be3287c336
F ext/misc/eval.c 4b4757592d00fd32e44c7a067e6a0e4839c81a4d57abc4131ee7806d1be3104e
F ext/misc/explain.c d5c12962d79913ef774b297006872af1fccda388f61a11d37758f9179a09551f
@ -1825,7 +1825,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
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F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
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2
manifest.uuid
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@ -1 +1 @@
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3eae4e301e3e4bcf14e96066f77be1434c5d4b3daadb10153cd36382589ac128