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Code Issues Releases Wiki Activity

Forbid isc_buffer_printf from growing the buffer unless auto reallocation is enabled

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This commit is contained in:
Ondřej Surý
2018-07-27 11:22:47 +02:00
parent 6a6dc2f410
commit 519bfe4c97
1 changed files with 9 additions and 3 deletions
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6
lib/isc/buffer.c
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@@ -662,10 +662,16 @@ isc_buffer_printf(isc_buffer_t *b, const char *format, ...) {
return (ISC_R_FAILURE); return (ISC_R_FAILURE);
} }
if (ISC_UNLIKELY(b->autore)) {
result = isc_buffer_reserve(&b, n + 1); result = isc_buffer_reserve(&b, n + 1);
if (result != ISC_R_SUCCESS) { if (result != ISC_R_SUCCESS) {
return (result); return (result);
} }
}
if (isc_buffer_availablelength(b) < (unsigned int)n + 1) {
return (ISC_R_NOSPACE);
}
va_start(ap, format); va_start(ap, format);
n = vsnprintf(isc_buffer_used(b), n + 1, format, ap); n = vsnprintf(isc_buffer_used(b), n + 1, format, ap);