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Fix some crashes in the sqlite3changeset_apply() function that could be caused

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by corrupt changeset blobs.

FossilOrigin-Name: 745a9a7fef0f28a57ea3f44899058993f6ecdedda52c81a09a4a9ce09c9004d6
This commit is contained in:
dan 2018-03-01 12:05:51 +00:00
parent bda30ce4d8
commit dd8a4af8e7
4 changed files with 67 additions and 22 deletions
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25
ext/session/session4.test
View File

@ -64,4 +64,29 @@ do_test 1.3 {
list [catch { sqlite3changeset_apply db $x xConflict } msg] $msg
} {1 SQLITE_CORRUPT}
#-------------------------------------------------------------------------
reset_db
do_execsql_test 2.0 {
CREATE TABLE t1(a INTEGER PRIMARY KEY,b,c,d);
CREATE TABLE t2(e TEXT PRIMARY KEY NOT NULL,f,g);
CREATE TABLE t3(w REAL PRIMARY KEY NOT NULL,x,y);
CREATE TABLE t4(z PRIMARY KEY) WITHOUT ROWID;
}
foreach {tn blob} {
1 {54010174340012000000}
2 {54fefe8bcb0012000300}
3 {5480809280808001017434001200fb}
4 {50af9c939c9c9cb09c9c6400b09c9c6400}
5 {12000300}
6 {09847304}
7 {5401017434001208}
} {
if {$tn==7} breakpoint
do_test 2.$tn {
set changeset [binary decode hex $blob]
list [catch { sqlite3changeset_apply db $changeset xConflict } msg] $msg
} {1 SQLITE_CORRUPT}
}
finish_test

46
ext/session/sqlite3session.c
View File

@ -2718,15 +2718,18 @@ static int sessionReadRecord(
for(i=0; i<nCol && rc==SQLITE_OK; i++){
int eType = 0; /* Type of value (SQLITE_NULL, TEXT etc.) */
if( abPK && abPK[i]==0 ) continue;
rc = sessionInputBuffer(pIn, 9);
if( pIn->iNext>=pIn->nData ){
rc = SQLITE_CORRUPT;
}else{
rc = sessionInputBuffer(pIn, 9);
}
if( rc==SQLITE_OK ){
eType = pIn->aData[pIn->iNext++];
}
assert( apOut[i]==0 );
if( eType ){
apOut[i] = sqlite3ValueNew(0);
if( !apOut[i] ) rc = SQLITE_NOMEM;
assert( apOut[i]==0 );
if( eType ){
apOut[i] = sqlite3ValueNew(0);
if( !apOut[i] ) rc = SQLITE_NOMEM;
}
}
if( rc==SQLITE_OK ){
@ -2857,11 +2860,15 @@ static int sessionChangesetReadTblhdr(sqlite3_changeset_iter *p){
int nByte;
int nVarint;
nVarint = sessionVarintGet(&p->in.aData[p->in.iNext], &p->nCol);
nCopy -= nVarint;
p->in.iNext += nVarint;
nByte = p->nCol * sizeof(sqlite3_value*) * 2 + nCopy;
p->tblhdr.nBuf = 0;
sessionBufferGrow(&p->tblhdr, nByte, &rc);
if( p->nCol>0 ){
nCopy -= nVarint;
p->in.iNext += nVarint;
nByte = p->nCol * sizeof(sqlite3_value*) * 2 + nCopy;
p->tblhdr.nBuf = 0;
sessionBufferGrow(&p->tblhdr, nByte, &rc);
}else{
rc = SQLITE_CORRUPT;
}
}
if( rc==SQLITE_OK ){
@ -2939,6 +2946,13 @@ static int sessionChangesetNext(
op = p->in.aData[p->in.iNext++];
}
if( p->zTab==0 ){
/* The first record in the changeset is not a table header. Must be a
** corrupt changeset. */
assert( p->in.iNext==1 );
return (p->rc = SQLITE_CORRUPT_BKPT);
}
p->op = op;
p->bIndirect = p->in.aData[p->in.iNext++];
if( p->op!=SQLITE_UPDATE && p->op!=SQLITE_DELETE && p->op!=SQLITE_INSERT ){
@ -3708,7 +3722,13 @@ static int sessionBindRow(
if( !abPK || abPK[i] ){
sqlite3_value *pVal;
(void)xValue(pIter, i, &pVal);
rc = sessionBindValue(pStmt, i+1, pVal);
if( pVal==0 ){
/* The value in the changeset was "undefined". This indicates a
** corrupt changeset blob. */
rc = SQLITE_CORRUPT;
}else{
rc = sessionBindValue(pStmt, i+1, pVal);
}
}
}
return rc;

16
manifest
View File

@ -1,5 +1,5 @@
C Enhance\sthe\ssessions\sdocumentation\sto\sshow\sthe\smethods\sof\sthe\svarious\sobjects.
D 2018-02-28T22:21:29.549
C Fix\ssome\scrashes\sin\sthe\ssqlite3changeset_apply()\sfunction\sthat\scould\sbe\scaused\nby\scorrupt\schangeset\sblobs.
D 2018-03-01T12:05:51.293
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F Makefile.in a2d2fb8d17c39ab5ec52beb27850b903949080848236923f436156b72a958737
@ -381,7 +381,7 @@ F ext/session/changeset.c 4ccbaa4531944c24584bf6a61ba3a39c62b6267a
F ext/session/session1.test 736d7ff178662f0b717c37f46531b84a5ce0210ccb0c4edf629c55dbcbbc3ea1
F ext/session/session2.test 284de45abae4cc1082bc52012ee81521d5ac58e0
F ext/session/session3.test ce9ce3dfa489473987f899e9f6a0f2db9bde3479
F ext/session/session4.test 457b02bdc349eb01151e54de014df77abd3c08c8
F ext/session/session4.test 488539cee1d2510b415236fac2727575f4110e7609a500eb21c8d9e517dfff38
F ext/session/session5.test 716bc6fafd625ce60dfa62ae128971628c1a1169
F ext/session/session6.test 443789bc2fca12e4f7075cf692c60b8a2bea1a26
F ext/session/session8.test 8e194b3f655d861ca36de5d4de53f702751bab3b
@ -402,7 +402,7 @@ F ext/session/sessionfault.test da273f2712b6411e85e71465a1733b8501dbf6f7
F ext/session/sessionfault2.test 04aa0bc9aa70ea43d8de82c4f648db4de1e990b0
F ext/session/sessionstat1.test 41cd97c2e48619a41cdf8ae749e1b25f34719de638689221aa43971be693bf4e
F ext/session/sessionwor.test 2f3744236dc8b170a695b7d8ddc8c743c7e79fdc
F ext/session/sqlite3session.c a5b7aed647abe7e366254b755597fce3f2719d82c98990cb0e1e07a3d203fe2b
F ext/session/sqlite3session.c bd8e52f8b4adef1d886564655030d5a7675baf59d52542c8f7eda99971048e13
F ext/session/sqlite3session.h b4de978c24a48a0d9b3b92ddfb749f4b07461766325ee950f5ecb8384c10606f
F ext/session/test_session.c eb0bd6c1ea791c1d66ee4ef94c16500dad936386
F ext/userauth/sqlite3userauth.h 7f3ea8c4686db8e40b0a0e7a8e0b00fac13aa7a3
@ -1708,7 +1708,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
P c949b915e893e917315ce21092d4c4bbd3e1b88d5326928f71dcc2f18f300702
R 6f69334171b7b3454d79aa33bdfe9b61
U drh
Z 67038639e12c985c1bd40cee53ce76b7
P e01177754ad6d9e2d38adddddd2e2e212094dac1154bda5fcee61ca8b678ae0f
R 72900d8c116195630f7d9bfcd1153ca1
U dan
Z e1e8f32ef49baada43e1fbc29b2fefd6

2
manifest.uuid
View File

@ -1 +1 @@
e01177754ad6d9e2d38adddddd2e2e212094dac1154bda5fcee61ca8b678ae0f
745a9a7fef0f28a57ea3f44899058993f6ecdedda52c81a09a4a9ce09c9004d6