ASSERT in xlog_find_verify_log_record during xfs/098

[Eric Sandeen <sandeen@xxxxxxxxxx>]

Al mentioned that he hit an ASSERT during xfs/098, a log fuzzer
test, in xlog_find_verify_log_record():


        for (i = (*last_blk) - 1; i >= 0; i--) {
                if (i < start_blk) {
                        /* valid log record not found */
                        xfs_warn(log->l_mp,
                "Log inconsistent (didn't find previous header)");
                        ASSERT(0);
                        error = -EIO;
                        goto out;
                }

Should that assert even be there?  Looks like it's gracefully
handled, I don't see offhand that anything should have caught
this corruption earlier, and we don't really want to bug on disk
corruption.  Am I missing something?

Thanks,
-Eric

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