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| author | Sverker Eriksson <[email protected]> | 2016-02-08 15:47:49 +0100 |
|---|---|---|
| committer | Sverker Eriksson <[email protected]> | 2016-02-08 16:11:56 +0100 |
| commit | 7a319cd96f7f4869300b32442ebe892ae557f41c (patch) | |
| tree | 74eac8b419d1f9de35b5deb46bdf2f4e3884df25 /erts/emulator/beam/erl_nif.c | |
| parent | 14680fcc3fb9d0357fe33a94525d08896afed1c5 (diff) | |
| download | otp-7a319cd96f7f4869300b32442ebe892ae557f41c.tar.gz otp-7a319cd96f7f4869300b32442ebe892ae557f41c.tar.bz2 otp-7a319cd96f7f4869300b32442ebe892ae557f41c.zip | |
erts: Fix error cases in enif_get_list_length
false if improper list
false if length > UINT_MAX
Diffstat (limited to 'erts/emulator/beam/erl_nif.c')
| -rw-r--r-- | erts/emulator/beam/erl_nif.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/erts/emulator/beam/erl_nif.c b/erts/emulator/beam/erl_nif.c index b057ec7770..12aaf4ce53 100644 --- a/erts/emulator/beam/erl_nif.c +++ b/erts/emulator/beam/erl_nif.c @@ -911,8 +911,13 @@ int enif_get_list_cell(ErlNifEnv* env, Eterm term, Eterm* head, Eterm* tail) int enif_get_list_length(ErlNifEnv* env, Eterm term, unsigned* len) { - if (is_not_list(term) && is_not_nil(term)) return 0; - *len = erts_list_length(term); + Sint i; + Uint u; + + if ((i = erts_list_length(term)) < 0) return 0; + u = (Uint)i; + if ((unsigned)u != u) return 0; + *len = u; return 1; } |