tools: mkenvimage: Fix possible segfault on stdin input

The size of 'filebuf' was not increased as more and more bytes are read
from stdin, but 'filebuf' was always reallocated to the same fix size.
This works as long as only less bytes than the initial buffer size come
in, for more input this will segfault. (It actually does, I tested
that.) So for each loop cycle the buffer size has to be increased by the
number of bytes we want to read.

Signed-off-by: Alexander Dahl <ada@thorsis.com>
This commit is contained in:
Alexander Dahl 2018-04-20 15:29:31 +02:00 committed by Tom Rini
parent 3559028cb2
commit c3b115f4b7

View File

@ -162,7 +162,7 @@ int main(int argc, char **argv)
txt_fd = STDIN_FILENO;
do {
filebuf = realloc(filebuf, readlen);
filebuf = realloc(filebuf, filesize + readlen);
if (!filebuf) {
fprintf(stderr, "Can't realloc memory for the input file buffer\n");
return EXIT_FAILURE;