Fix mangrove crash #43
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Crash observed when document length is 257 byte, for example. It represents as '0x01 01 00 00'. In this case '_bytes_read == _len' equal to 1 and callback is called with partial buffer (only 1 byte actually). This cause later crash in 'to_dotted_notation_document' Signed-off-by: Abylay Ospan <aospan@netup.ru>
rkargon
reviewed
Sep 14, 2018
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| // This creates the document from the given bytes, and calls the user-provided callback. | ||
| if (_bytes_read == _len) { | ||
| if (_bytes_read == _len && _len > 4) { |
There was a problem hiding this comment.
How about earlier(e..g line 54) just returning early if _bytes_read < 4, so we're never dealing with an invalid _len in the later code?
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Wow, good catch! |
Author
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@rkargon tnx :) BTW, better to implement: then we shouldn't care about buffer assembly and avoid byte-by-byte copy (which can slow down whole process) |
With mongo-cxx-3.2+ we have exception:
terminate called after throwing an instance of
'bsoncxx::v_noabi::exception'
what(): can't convert builder to a valid view: unmatched key
while using embedded documents. For example:
{
"name" : "Jenny",
"contact_info" :
{
"type" : "home"
}
}
we have called twice:
1. for "contact_info" key
2. for "contact_info.type" key
in mongo-cxx-3.2+ we can't call key_view/key_owned twice. Otherwise we
receive exception as described above.
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Incorrect fix revert. This reverts commit 4f0c9e9.
With modern mongo-cxx (tested on 3.3.1) we have exception while using
embedded documents:
terminate called after throwing an instance of
'bsoncxx::v_noabi::exception'
what(): can't convert builder to a valid view: unmatched key
For example:
{
"name" : "Jenny",
"contact_info" :
{
"type" : "home"
}
}
we have called twice:
1. for "contact_info" key
2. for "contact_info.type" key
we can't call key_view/key_owned twice.
Otherwise we receive exception as described above.
Signed-off-by: Abylay Ospan <aospan@netup.ru>
This reverts commit 789d683.
With modern mongo-cxx (tested on 3.3.1) we have exception while using
embedded documents:
terminate called after throwing an instance of
'bsoncxx::v_noabi::exception'
what(): can't convert builder to a valid view: unmatched key
For example:
{
"name" : "Jenny",
"contact_info" :
{
"type" : "home"
}
}
we have called twice:
1. for "contact_info" key
2. for "contact_info.type" key
we can't call key_view/key_owned twice.
Otherwise we receive exception as described above.
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Save 'key' if we do not in dot notation mode Signed-off-by: Abylay Ospan <aospan@netup.ru>
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Crash observed when document length is 257 byte, for example.
It represents as '0x01 01 00 00'.
In this case '_bytes_read == _len' equal to 1 and callback is called
with partial buffer (only 1 byte actually). This cause later crash in
'to_dotted_notation_document'
Signed-off-by: Abylay Ospan aospan@netup.ru