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| author | Sverker Eriksson <sverker@erlang.org> | 2017-08-30 19:53:37 +0200 |
|---|---|---|
| committer | Sverker Eriksson <sverker@erlang.org> | 2017-08-30 20:21:10 +0200 |
| commit | 97dc5e7f396129222419811c173edc7fa767b0f8 (patch) | |
| tree | 636fd537cd1634a04176d635183668efa64c3650 | |
| parent | 8cece79b77952c991e62ae595bcf71cde016a052 (diff) | |
| download | erlang-97dc5e7f396129222419811c173edc7fa767b0f8.tar.gz | |
erts: Fix crash in binary_to_atom/term for invalid utf8
such as a sub-binary, of a correct utf8 string,
that ends in the middle of a character.
| -rw-r--r-- | erts/emulator/beam/atom.c | 2 | ||||
| -rw-r--r-- | erts/emulator/test/bif_SUITE.erl | 3 | ||||
| -rw-r--r-- | erts/emulator/test/binary_SUITE.erl | 3 |
3 files changed, 7 insertions, 1 deletions
diff --git a/erts/emulator/beam/atom.c b/erts/emulator/beam/atom.c index 84d2d5e3ed..f95582d1ab 100644 --- a/erts/emulator/beam/atom.c +++ b/erts/emulator/beam/atom.c @@ -137,7 +137,7 @@ atom_hash(Atom* obj) while(len--) { v = *p++; /* latin1 clutch for r16 */ - if ((v & 0xFE) == 0xC2 && (*p & 0xC0) == 0x80) { + if (len && (v & 0xFE) == 0xC2 && (*p & 0xC0) == 0x80) { v = (v << 6) | (*p & 0x3F); p++; len--; } diff --git a/erts/emulator/test/bif_SUITE.erl b/erts/emulator/test/bif_SUITE.erl index 02c6de8cb1..dd1949d041 100644 --- a/erts/emulator/test/bif_SUITE.erl +++ b/erts/emulator/test/bif_SUITE.erl @@ -482,6 +482,9 @@ binary_to_atom(Config) when is_list(Config) -> ?line ?BADARG(binary_to_atom(id(<<255>>), utf8)), ?line ?BADARG(binary_to_atom(id(<<255,0>>), utf8)), ?line ?BADARG(binary_to_atom(id(<<16#C0,16#80>>), utf8)), %Overlong 0. + <<B:1/binary, _/binary>> = id(<<194, 163>>), %Truncated character ERL-474 + ?BADARG(binary_to_atom(B, utf8)), + ?line [?BADARG(binary_to_atom(<<C/utf8>>, utf8)) || C <- lists:seq(256, 16#D7FF)], ?line [?BADARG(binary_to_atom(<<C/utf8>>, utf8)) || diff --git a/erts/emulator/test/binary_SUITE.erl b/erts/emulator/test/binary_SUITE.erl index fe0a745db8..fc3be38519 100644 --- a/erts/emulator/test/binary_SUITE.erl +++ b/erts/emulator/test/binary_SUITE.erl @@ -599,6 +599,9 @@ bad_binary_to_term(Config) when is_list(Config) -> %% Bad float. ?line bad_bin_to_term(<<131,70,-1:64>>), + + %% Truncated UTF8 character (ERL-474) + bad_bin_to_term(<<131,119,1,194,163>>), ok. bad_bin_to_term(BadBin) -> |