Debian Bug report logs - #696178
git: Non-helpful error message if expected object file is a directory: fatal: Out of memory? mmap failed: No such device

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Package: git; Maintainer for git is Jonathan Nieder <[email protected]>; Source for git is src:git (PTS, buildd, popcon).

Reported by: Axel Beckert <[email protected]>

Date: Mon, 17 Dec 2012 16:15:07 UTC

Severity: minor

Found in version git/1:1.7.10.4-2

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Message #10 received at [email protected] (full text, mbox, reply):

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Date: Mon, 11 Jun 2018 19:52:36 +0200
From: Michał Mirosław <[email protected]>
To: [email protected]
Subject: git: "mmap: No such device" on broken .git tree
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Dear Git Maintainer,

This bug is present in git from testing/backports.

# LANG=C apt policy git
git:
  Installed: 1:2.17.1-1~bpo9+1
  Candidate: 1:2.17.1-1~bpo9+1
  Version table:
 *** 1:2.17.1-1~bpo9+1 500
        500 http://ftp.pl.debian.org/debian stretch-backports/main amd64 Packages
        100 /var/lib/dpkg/status
     1:2.11.0-3+deb9u3 500
        500 http://security.debian.org stretch/updates/main amd64 Packages
        500 http://ftp.pl.debian.org/debian stretch-proposed-updates/main amd64 Packages
     1:2.11.0-3+deb9u2 500
        500 http://ftp.pl.debian.org/debian stretch/main amd64 Packages

A script to reproduce:

-----------------
#!/bin/bash
git init foo
cd foo
touch bar
git add -A
git commit -mtest
for i in .git/objects/*/*; do rm -f $i; mkdir $i; break; done
git fsck
# fatal: mmap failed: No such device
------------

Best Regards,
Michał Mirosław

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