fuzz-journal-remote: allow -ENODATA too

It seems that we try to create a new file, which fails with -ENOSPC, and we
later fail when reading a file with ENODATA.  journal_file_open() will return
-ENODATA if the file is too short or if journal_file_verify_header() fails.
We'll unlink a file we newly created if we fail to initialize it immediately
after creation. I'm not sure if the file we fail to open is the one we newly
created and e.g. failed to create the arena and such, or if it's the file we
were trying to rotate away from. Either way, I think we should be OK with
with a non-fully-initialized journal file.

Failed to create rotated journal: No space left on device
Failed to write entry of 2 bytes: No space left on device
sd_journal_open_files(["/tmp/fuzz-journal-remote.vELRpI.journal"]) failed: No data available
Assertion 'IN_SET(r, -ENOMEM, -EMFILE, -ENFILE)' failed at src/journal-remote/fuzz-journal-remote.c:70, function int LLVMFuzzerTestOneInput(const uint8_t *, size_t)(). Aborting.

oss-fuzz-39238: https://oss-fuzz.com/issue/4609851129462784

diff --git a/src/journal-remote/fuzz-journal-remote.c b/src/journal-remote/fuzz-journal-remote.c
index 9206b9940670846e8a61d1e0ffe3f8e4bd0f902d..a8e56e21b2a36b24a63f4f7f5a242259a490668d 100644 (file)
--- a/src/journal-remote/fuzz-journal-remote.c
+++ b/src/journal-remote/fuzz-journal-remote.c
@@ -66,7 +66,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
         r = sd_journal_open_files(&j, (const char**) STRV_MAKE(name), 0);
         if (r < 0) {
                 log_error_errno(r, "sd_journal_open_files([\"%s\"]) failed: %m", name);
-                assert_se(IN_SET(r, -ENOMEM, -EMFILE, -ENFILE));
+                assert_se(IN_SET(r, -ENOMEM, -EMFILE, -ENFILE, -ENODATA));
                 return r;
         }