user/dev discussion of public-inbox itself
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* [PATCH] viewvcs: check for premature EOF from git-cat-file
@ 2019-04-02  0:45 Eric Wong
  0 siblings, 0 replies; only message in thread
From: Eric Wong @ 2019-04-02  0:45 UTC (permalink / raw)
  To: meta

Not entirely sure what is causing this, but it appears to
be causing infinite loops when attempting to display certain
blobs.

Fortunately, the fair scheduling of public-inbox-httpd prevented
this from becoming a real problem aside from increasing CPU
usage.
---
 lib/PublicInbox/ViewVCS.pm | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/PublicInbox/ViewVCS.pm b/lib/PublicInbox/ViewVCS.pm
index b90cd8c..962dc66 100644
--- a/lib/PublicInbox/ViewVCS.pm
+++ b/lib/PublicInbox/ViewVCS.pm
@@ -62,6 +62,10 @@ sub stream_large_blob ($$$$) {
 				my $ct = 'text/plain; charset=UTF-8';
 				return [200, ['Content-Type', $ct, @cl] ];
 			}
+			if ($r == 0) {
+				warn "premature EOF on $oid $$logref\n";
+				return html_page($ctx, 500, $logref);
+			}
 			undef; # bref keeps growing
 		}
 	});
-- 
EW


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2019-04-02  0:45 [PATCH] viewvcs: check for premature EOF from git-cat-file Eric Wong

user/dev discussion of public-inbox itself

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