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added better error handling to forkserver fd

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This commit is contained in:
Dominik Maier
2020-11-03 13:41:06 +01:00
parent 350c3b323a
commit d795ec0451
3 changed files with 20 additions and 10 deletions
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9
src/afl-forkserver.c
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@ -983,10 +983,13 @@ void afl_fsrv_write_to_testcase(afl_forkserver_t *fsrv, u8 *buf, size_t len) {
if (fd < 0) { PFATAL("Unable to create '%s'", fsrv->out_file); }
} else if (unlikely(!fd)) {
} else if (unlikely(fd <= 0)) {
// We should never have stdin as fd here, 0 is likely unset.
FATAL("Nowhere to write output to (neither out_fd nor out_file set)");
// We should have a (non-stdin) fd at this point, else we got a problem.
FATAL(
"Nowhere to write output to (neither out_fd nor out_file set (fd is "
"%d))",
fd);
} else {