diff options
Diffstat (limited to 'erts/emulator/beam/bif.c')
| -rw-r--r-- | erts/emulator/beam/bif.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/erts/emulator/beam/bif.c b/erts/emulator/beam/bif.c index 9c8c0df9f0..1b670585a7 100644 --- a/erts/emulator/beam/bif.c +++ b/erts/emulator/beam/bif.c @@ -4143,6 +4143,7 @@ BIF_RETTYPE blocking_read_file_1(BIF_ALIST_1) FILE *file; struct stat file_info; char *filename = NULL; + size_t size; i = list_length(BIF_ARG_1); if (i < 0) { @@ -4170,9 +4171,13 @@ BIF_RETTYPE blocking_read_file_1(BIF_ALIST_1) fclose(file); BIF_RET(TUPLE2(hp, am_error, am_allocator)); } - fread(buff, 1, buff_size, file); + size = fread(buff, 1, buff_size, file); fclose(file); - bin = new_binary(BIF_P, buff, buff_size); + if (size < 0) + size = 0; + else if (size > buff_size) + size = (size_t) buff_size; + bin = new_binary(BIF_P, buff, (int) size); erts_free(ERTS_ALC_T_TMP, (void *) buff); BIF_RET(TUPLE2(hp, am_ok, bin)); |