diff options
Diffstat (limited to 'lib/asn1')
| -rw-r--r-- | lib/asn1/c_src/asn1_erl_nif.c | 10 | ||||
| -rw-r--r-- | lib/asn1/doc/src/notes.xml | 22 | ||||
| -rw-r--r-- | lib/asn1/test/asn1_SUITE.erl | 43 |
3 files changed, 71 insertions, 4 deletions
diff --git a/lib/asn1/c_src/asn1_erl_nif.c b/lib/asn1/c_src/asn1_erl_nif.c index d5aaadb89b..797be6d4f8 100644 --- a/lib/asn1/c_src/asn1_erl_nif.c +++ b/lib/asn1/c_src/asn1_erl_nif.c @@ -1,7 +1,7 @@ /* * %CopyrightBegin% * - * Copyright Ericsson AB 2002-2017. All Rights Reserved. + * Copyright Ericsson AB 2002-2018. All Rights Reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -949,6 +949,12 @@ static int ber_decode_value(ErlNifEnv* env, ERL_NIF_TERM *value, unsigned char * unsigned char *tmp_out_buff; ERL_NIF_TERM term = 0, curr_head = 0; + /* Recursion depth limitation, borrow a signed int: maybe_ret */ + maybe_ret = (int) (ErlNifSInt) ((char *)value - (char *)ib_index); + maybe_ret = maybe_ret < 0 ? -maybe_ret : maybe_ret; + if (maybe_ret >= sizeof(void *) * 8192) /* 8 k pointer words */ + return ASN1_ERROR; + if (((in_buf[*ib_index]) & 0x80) == ASN1_SHORT_DEFINITE_LENGTH) { len = in_buf[*ib_index]; } else if (in_buf[*ib_index] == ASN1_INDEFINITE_LENGTH) { @@ -993,7 +999,7 @@ static int ber_decode_value(ErlNifEnv* env, ERL_NIF_TERM *value, unsigned char * while (*ib_index < end_index) { if ((maybe_ret = ber_decode(env, &term, in_buf, ib_index, - in_buf_len)) <= ASN1_ERROR + *ib_index + len)) <= ASN1_ERROR ) return maybe_ret; curr_head = enif_make_list_cell(env, term, curr_head); diff --git a/lib/asn1/doc/src/notes.xml b/lib/asn1/doc/src/notes.xml index 860cf4d22d..c86fa79c2c 100644 --- a/lib/asn1/doc/src/notes.xml +++ b/lib/asn1/doc/src/notes.xml @@ -47,6 +47,28 @@ </section> +<section><title>Asn1 5.0.5.1</title> + + <section><title>Known Bugs and Problems</title> + <list> + <item> + <p>A bug in ASN.1 BER decoding has been fixed. When + decoding a recursively enclosed term the length was not + propagated to that term decoding, so if the length of the + enclosed term was longer than the enclosing that error + was not dectected</p> <p>A hard coded C stack limitation + for decoding recursive ASN.1 terms has been introduced. + This is currently set to 8 kWords giving a nesting depth + of about 1000 levels. Deeper terms can not be decoded, + which should not be much of a real world limitation.</p> + <p> + Own Id: OTP-14440 Aux Id: ERIERL-220 </p> + </item> + </list> + </section> + +</section> + <section><title>Asn1 5.0.5</title> <section><title>Fixed Bugs and Malfunctions</title> diff --git a/lib/asn1/test/asn1_SUITE.erl b/lib/asn1/test/asn1_SUITE.erl index 7b669c1c2c..5506923341 100644 --- a/lib/asn1/test/asn1_SUITE.erl +++ b/lib/asn1/test/asn1_SUITE.erl @@ -132,7 +132,8 @@ groups() -> testSeq2738, % Uses 'Constructed' {group, [], [constructed, - ber_decode_error]}, + ber_decode_error, + otp_14440]}, testSeqSetIndefinite, testChoiceIndefinite, per_open_type, @@ -736,6 +737,36 @@ ber_decode_error(Config, Rule, Opts) -> asn1_test_lib:compile("Constructed", Config, [Rule|Opts]), ber_decode_error:run(Opts). +otp_14440(_Config) -> + Args = " -pa \"" ++ filename:dirname(code:which(?MODULE)) ++ "\"", + {ok,N} = slave:start(hostname(), otp_14440, Args), + Result = rpc:call(N, ?MODULE, otp_14440_decode, []), + io:format("Decode result = ~p~n", [Result]), + case Result of + {exit,{error,{asn1,{invalid_value,5}}}} -> + ok = slave:stop(N); + %% We get this if stack depth limit kicks in: + {exit,{error,{asn1,{unknown,_}}}} -> + ok = slave:stop(N); + _ -> + _ = slave:stop(N), + ?t:fail(Result) + end. +%% +otp_14440_decode() -> + Data = + iolist_to_binary( + lists:duplicate( + 32, list_to_binary(lists:duplicate(1024, 16#7f)))), + try asn1rt_nif:decode_ber_tlv(Data) of + Result -> + {unexpected_return,Result} + catch + Class:Reason -> + {Class,Reason} + end. + + h323test(Config) -> test(Config, fun h323test/3). h323test(Config, Rule, Opts) -> Files = ["H235-SECURITY-MESSAGES", "H323-MESSAGES", @@ -1350,7 +1381,7 @@ xref_export_all(_Config) -> {ok,_} = xref:q(S, Def), {ok,Unused} = xref:q(S, "X - Called - range (closure E | Called)"), xref:stop(S), - case Unused of + case Unused -- [{?MODULE,otp_14440_decode,0}] of [] -> ok; [_|_] -> @@ -1385,3 +1416,11 @@ all_called_1([F|T]) when is_atom(F) -> L ++ all_called_1(T); all_called_1([]) -> []. + +hostname() -> + hostname(atom_to_list(node())). + +hostname([$@ | Hostname]) -> + list_to_atom(Hostname); +hostname([_C | Cs]) -> + hostname(Cs). |