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Overview
| Comment: | Avoid signed integer overflow when converting oversized in-line integer widths and precisions in printf(). |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
8e4ac2ce24415926247961b00a62425a |
| User & Date: | drh 2015-04-07 15:39:29 |
References
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2015-05-20
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| 19:48 | Avoid signed integer overflow when converting oversized in-line integer widths and precisions in printf(). Cherrypick of [c494171f77dc], [5ce4e7d7651e], [95625ef3adc3] and [8e4ac2ce2441]. check-in: b330c7ff user: dan tags: branch-3.8.6 | |
Context
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2015-05-20
| ||
| 19:48 | Avoid signed integer overflow when converting oversized in-line integer widths and precisions in printf(). Cherrypick of [c494171f77dc], [5ce4e7d7651e], [95625ef3adc3] and [8e4ac2ce2441]. check-in: b330c7ff user: dan tags: branch-3.8.6 | |
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2015-04-08
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| 12:16 | Version 3.8.9 check-in: 8a8ffc86 user: drh tags: trunk, release, version-3.8.9 | |
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2015-04-07
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| 23:10 | Merge printf() width and precision overflow fixes from trunk. check-in: aeca95ac user: drh tags: sessions | |
| 21:18 | Merge updates from trunk. check-in: c458db41 user: mistachkin tags: expShell | |
| 15:39 | Avoid signed integer overflow when converting oversized in-line integer widths and precisions in printf(). check-in: 8e4ac2ce user: drh tags: trunk | |
| 14:38 | Another change to avoid a problem caused by integer overflow in the printf() code. check-in: 95625ef3 user: dan tags: trunk | |
Changes
Changes to src/printf.c.
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if( bArgList ){
width = (int)getIntArg(pArgList);
}else{
width = va_arg(ap,int);
}
if( width<0 ){
flag_leftjustify = 1;
width = -width;
}
c = *++fmt;
}else{
while( c>='0' && c<='9' ){
width = width*10 + c - '0';
c = *++fmt;
}
}
if( width<0 ) width = 0; /* force to non-negative after int overflow */
/* Get the precision */
if( c=='.' ){
precision = 0;
c = *++fmt;
if( c=='*' ){
if( bArgList ){
precision = (int)getIntArg(pArgList);
}else{
precision = va_arg(ap,int);
}
c = *++fmt;
}else{
while( c>='0' && c<='9' ){
precision = precision*10 + c - '0';
c = *++fmt;
}
}
/* If a negative precision has been specified, use its absolute value
** instead. This is (probably) not standard printf() behaviour, but
** it is what sqlite3_mprintf() and friends have always done. If the
** precision specified is -2147483648, use 0. */
if( precision<0 ) precision = (-precision) & 0x7fffffff;
}else{
precision = -1;
}
/* Get the conversion type modifier */
if( c=='l' ){
flag_long = 1;
c = *++fmt;
|
| > | > > < > > > > | > > < < < < < < |
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if( bArgList ){
width = (int)getIntArg(pArgList);
}else{
width = va_arg(ap,int);
}
if( width<0 ){
flag_leftjustify = 1;
width = width >= -2147483647 ? -width : 0;
}
c = *++fmt;
}else{
unsigned wx = 0;
while( c>='0' && c<='9' ){
wx = wx*10 + c - '0';
c = *++fmt;
}
testcase( wx>0x7fffffff );
width = wx & 0x7fffffff;
}
/* Get the precision */
if( c=='.' ){
precision = 0;
c = *++fmt;
if( c=='*' ){
if( bArgList ){
precision = (int)getIntArg(pArgList);
}else{
precision = va_arg(ap,int);
}
c = *++fmt;
if( precision<0 ){
precision = precision >= -2147483647 ? -precision : -1;
}
}else{
unsigned px = 0;
while( c>='0' && c<='9' ){
px = px*10 + c - '0';
c = *++fmt;
}
testcase( px>0x7fffffff );
precision = px & 0x7fffffff;
}
}else{
precision = -1;
}
/* Get the conversion type modifier */
if( c=='l' ){
flag_long = 1;
c = *++fmt;
|
Changes to test/printf.test.
479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 .... 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 .... 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 |
sqlite3_mprintf_int {abd: %*d %x} 2147483647 1 1
} {}
do_test printf-1.17.3 {
sqlite3_mprintf_int {abd: %*d %x} -2147483648 1 1
} {abd: 1 1}
do_test printf-1.17.4 {
sqlite3_mprintf_int {abd: %.2147483648d %x %x} 1 1 1
} {abd: 1 1 1}
do_test printf-2.1.1.1 {
sqlite3_mprintf_double {abc: (%*.*f) :xyz} 1 1 0.001
} {abc: (0.0) :xyz}
do_test printf-2.1.1.2 {
sqlite3_mprintf_double {abc: (%*.*e) :xyz} 1 1 0.001
} {abc: (1.0e-03) :xyz}
do_test printf-2.1.1.3 {
................................................................................
sqlite3_mprintf_str {%d A String: (%*s)} 1 2147483647 {This is the string}
} []
do_test printf-3.8 {
sqlite3_mprintf_str {%d A String: (%*s)} 1 -2147483648 {This is the string}
} {1 A String: (This is the string)}
do_test printf-3.9 {
sqlite3_mprintf_str {%d A String: (%.*s)} 1 -2147483648 {This is the string}
} {1 A String: ()}
do_test snprintf-3.11 {
sqlite3_snprintf_str 2 {x%d %d %s} 10 10 {This is the string}
} {x}
do_test snprintf-3.12 {
sqlite3_snprintf_str 3 {x%d %d %s} 10 10 {This is the string}
} {x1}
do_test snprintf-3.13 {
................................................................................
do_test printf-13.5 {
sqlite3_mprintf_hexdouble %.20f fff0000000000000
} {-Inf}
do_test printf-13.6 {
sqlite3_mprintf_hexdouble %.20f fff8000000000000
} {NaN}
do_test printf-13.7 {
sqlite3_mprintf_hexdouble %3000000000.10000f 4693b8b5b5056e17
} "100000000000000000000000000000000.[string repeat 0 10000]"
do_test printf-14.1 {
sqlite3_mprintf_str {abc-%y-123} 0 0 {not used}
} {abc-}
do_test printf-14.2 {
sqlite3_mprintf_n_test {xyzzy}
} 5
|
| | | | |
479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 .... 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 .... 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 |
sqlite3_mprintf_int {abd: %*d %x} 2147483647 1 1
} {}
do_test printf-1.17.3 {
sqlite3_mprintf_int {abd: %*d %x} -2147483648 1 1
} {abd: 1 1}
do_test printf-1.17.4 {
sqlite3_mprintf_int {abd: %.2147483648d %x %x} 1 1 1
} {/.*/}
do_test printf-2.1.1.1 {
sqlite3_mprintf_double {abc: (%*.*f) :xyz} 1 1 0.001
} {abc: (0.0) :xyz}
do_test printf-2.1.1.2 {
sqlite3_mprintf_double {abc: (%*.*e) :xyz} 1 1 0.001
} {abc: (1.0e-03) :xyz}
do_test printf-2.1.1.3 {
................................................................................
sqlite3_mprintf_str {%d A String: (%*s)} 1 2147483647 {This is the string}
} []
do_test printf-3.8 {
sqlite3_mprintf_str {%d A String: (%*s)} 1 -2147483648 {This is the string}
} {1 A String: (This is the string)}
do_test printf-3.9 {
sqlite3_mprintf_str {%d A String: (%.*s)} 1 -2147483648 {This is the string}
} {1 A String: (This is the string)}
do_test snprintf-3.11 {
sqlite3_snprintf_str 2 {x%d %d %s} 10 10 {This is the string}
} {x}
do_test snprintf-3.12 {
sqlite3_snprintf_str 3 {x%d %d %s} 10 10 {This is the string}
} {x1}
do_test snprintf-3.13 {
................................................................................
do_test printf-13.5 {
sqlite3_mprintf_hexdouble %.20f fff0000000000000
} {-Inf}
do_test printf-13.6 {
sqlite3_mprintf_hexdouble %.20f fff8000000000000
} {NaN}
do_test printf-13.7 {
sqlite3_mprintf_hexdouble %2147483648.10000f 4693b8b5b5056e17
} {/100000000000000000000000000000000.00/}
do_test printf-14.1 {
sqlite3_mprintf_str {abc-%y-123} 0 0 {not used}
} {abc-}
do_test printf-14.2 {
sqlite3_mprintf_n_test {xyzzy}
} 5
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