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Overview
| Comment: | Fix potential 32-bit integer overflow problems on the offset and length parameters to sqlite3_blob_read() and sqlite3_blob_write(). For sqlite3_blob_open(), make sure the *ppBlob return parameter is zeroed if the interface fails with SQLITE_MISUSE. |
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| Timelines: | family | ancestors | descendants | both | trunk |
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| SHA1: |
5df02f50f8348dfde4fc15126abc7b7e |
| User & Date: | drh 2015-02-07 15:16:35 |
Context
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2015-02-09
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| 10:20 | Fix over-length source code lines in resolver.c. No logic changes. check-in: c12edb85 user: drh tags: trunk | |
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2015-02-07
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| 15:30 | Merge increment blob I/O fixes from trunk. check-in: 292cf68b user: drh tags: apple-osx | |
| 15:16 | Fix potential 32-bit integer overflow problems on the offset and length parameters to sqlite3_blob_read() and sqlite3_blob_write(). For sqlite3_blob_open(), make sure the *ppBlob return parameter is zeroed if the interface fails with SQLITE_MISUSE. check-in: 5df02f50 user: drh tags: trunk | |
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2015-02-06
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| 14:51 | Change the name of ".info" to ".dbinfo" and add an optional second argument which is the ATTACH-ed DB about which information is provided. Provide ".indexes" as an alternative name to the legacy ".indices" command. check-in: 0f65a7e2 user: drh tags: trunk | |
Changes
Changes to src/vdbeblob.c.
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int rc = SQLITE_OK; char *zErr = 0; Table *pTab; Parse *pParse = 0; Incrblob *pBlob = 0; #ifdef SQLITE_ENABLE_API_ARMOR if( !sqlite3SafetyCheckOk(db) || ppBlob==0 || zTable==0 ){ return SQLITE_MISUSE_BKPT; } #endif flags = !!flags; /* flags = (flags ? 1 : 0); */ *ppBlob = 0; sqlite3_mutex_enter(db->mutex); pBlob = (Incrblob *)sqlite3DbMallocZero(db, sizeof(Incrblob)); if( !pBlob ) goto blob_open_out; pParse = sqlite3StackAllocRaw(db, sizeof(*pParse)); if( !pParse ) goto blob_open_out; ................................................................................ sqlite3 *db; if( p==0 ) return SQLITE_MISUSE_BKPT; db = p->db; sqlite3_mutex_enter(db->mutex); v = (Vdbe*)p->pStmt; if( n<0 || iOffset<0 || (iOffset+n)>p->nByte ){ /* Request is out of range. Return a transient error. */ rc = SQLITE_ERROR; }else if( v==0 ){ /* If there is no statement handle, then the blob-handle has ** already been invalidated. Return SQLITE_ABORT in this case. */ rc = SQLITE_ABORT; |
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int rc = SQLITE_OK; char *zErr = 0; Table *pTab; Parse *pParse = 0; Incrblob *pBlob = 0; #ifdef SQLITE_ENABLE_API_ARMOR if( ppBlob==0 ){ return SQLITE_MISUSE_BKPT; } #endif *ppBlob = 0; #ifdef SQLITE_ENABLE_API_ARMOR if( !sqlite3SafetyCheckOk(db) || zTable==0 ){ return SQLITE_MISUSE_BKPT; } #endif flags = !!flags; /* flags = (flags ? 1 : 0); */ sqlite3_mutex_enter(db->mutex); pBlob = (Incrblob *)sqlite3DbMallocZero(db, sizeof(Incrblob)); if( !pBlob ) goto blob_open_out; pParse = sqlite3StackAllocRaw(db, sizeof(*pParse)); if( !pParse ) goto blob_open_out; ................................................................................ sqlite3 *db; if( p==0 ) return SQLITE_MISUSE_BKPT; db = p->db; sqlite3_mutex_enter(db->mutex); v = (Vdbe*)p->pStmt; if( n<0 || iOffset<0 || ((sqlite3_int64)iOffset+n)>p->nByte ){ /* Request is out of range. Return a transient error. */ rc = SQLITE_ERROR; }else if( v==0 ){ /* If there is no statement handle, then the blob-handle has ** already been invalidated. Return SQLITE_ABORT in this case. */ rc = SQLITE_ABORT; |
Changes to test/incrblob2.test.
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close $rdHandle
} {}
do_test incrblob2-6.2 {
set rdHandle [db incrblob -readonly t1 data 1]
sqlite3_blob_read $rdHandle 0 2
} {AB}
do_test incrblob2-6.3 {
set wrHandle [db incrblob t1 data 1]
sqlite3_blob_write $wrHandle 0 ZZZZZZZZZZ
sqlite3_blob_read $rdHandle 2 4
} {ZZZZ}
do_test incrblob2-6.4 {
close $wrHandle
close $rdHandle
} {}
sqlite3_memory_highwater 1
|
> > > > > > > > > > > > > > > > > > > > > > |
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close $rdHandle
} {}
do_test incrblob2-6.2 {
set rdHandle [db incrblob -readonly t1 data 1]
sqlite3_blob_read $rdHandle 0 2
} {AB}
do_test incrblob2-6.2b {
set rc [catch {
# Prior to 2015-02-07, the following caused a segfault due to
# integer overflow.
sqlite3_blob_read $rdHandle 2147483647 2147483647
} errmsg]
lappend rc $errmsg
} {1 SQLITE_ERROR}
do_test incrblob2-6.3 {
set wrHandle [db incrblob t1 data 1]
sqlite3_blob_write $wrHandle 0 ZZZZZZZZZZ
sqlite3_blob_read $rdHandle 2 4
} {ZZZZ}
do_test incrblob2-6.3b {
set rc [catch {
# Prior to 2015-02-07, the following caused a segfault due to
# integer overflow.
sqlite3_blob_write $wrHandle 2147483647 YYYYYYYYYYYYYYYYYY
} errmsg]
lappend rc $errmsg
} {1 SQLITE_ERROR}
do_test incrblob2-6.3c {
sqlite3_blob_read $rdHandle 2 4
} {ZZZZ}
do_test incrblob2-6.4 {
close $wrHandle
close $rdHandle
} {}
sqlite3_memory_highwater 1
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