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Avoid access violation after parser_parse_chunky_headers call.

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In parser_parse_chunky_headers, parser->msg.msg.buf can be changed
by membuffer_delete call. Therefore if we save the pointer to
parser->msg.entity.buf before calling membuffer_delete, it will
induce access to released memory.
(cherry picked from commit d72bb5cff51bfc261de7725536cef53fd1f0b356)
This commit is contained in:
Yoichi NAKAYAMA 2012-04-12 01:47:26 +09:00 committed by Marcelo Roberto Jimenez
parent 24715afab8
commit 4e25119237
2 changed files with 13 additions and 4 deletions
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9
ChangeLog
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@ -332,6 +332,15 @@ Version 1.8.0
Version 1.6.18
*******************************************************************************
2012-04-11 Yoichi NAKAYAMA <yoichi.nakayama(at)gmail.com>
Avoid access violation after parser_parse_chunky_headers call.
In parser_parse_chunky_headers, parser->msg.msg.buf can be changed
by membuffer_delete call. Therefore if we save the pointer to
parser->msg.entity.buf before calling membuffer_delete, it will
induce access to released memory.
2012-04-06 Yoichi NAKAYAMA <yoichi.nakayama(at)gmail.com>
Remove possibility of access violation.

8
upnp/src/genlib/net/http/httpparser.c
View File

@ -1684,14 +1684,14 @@ parser_parse_chunky_headers( INOUT http_parser_t * parser )
/* finally, done with the whole msg */
parser->position = POS_COMPLETE;
/* save entity start ptr as the very last thing to do */
parser->msg.entity.buf = parser->msg.msg.buf +
parser->entity_start_position;
membuffer_delete( &parser->msg.msg, save_pos,
( parser->scanner.cursor - save_pos ) );
parser->scanner.cursor = save_pos;
/* save entity start ptr as the very last thing to do */
parser->msg.entity.buf = parser->msg.msg.buf +
parser->entity_start_position;
return PARSE_SUCCESS;
} else {
return status;