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Date:      Thu, 12 Feb 2015 18:39:45 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 197578] md5 returns random values each time; breaking freebsd-update
Message-ID:  <bug-197578-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=197578

            Bug ID: 197578
           Summary: md5 returns random values each time; breaking
                    freebsd-update
           Product: Base System
           Version: 10.1-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: klamothe@vianet.ca

Hello,

I'm having an odd problem at times with this one server.

It started off with this. It's currently running 10.1-p5 on amd64 hardware.
memtest86 yields no errors.

# freebsd-update fetch
Looking up update.FreeBSD.org mirrors... 5 mirrors found.
Fetching metadata signature for 10.1-RELEASE from update5.freebsd.org... done.
Fetching metadata index... done.
Inspecting system... done.
Preparing to download files...
File changed while FreeBSD Update running: /boot/kernel/kernel

Running md5 on this file shows it's constantly changing

root@monitor:~ # md5 /boot/kernel/kernel
MD5 (/boot/kernel/kernel) = 0aa7bfe32ca8bb34cbf31a3c988da062
root@monitor:~ # md5 /boot/kernel/kernel
MD5 (/boot/kernel/kernel) = eb30ceb29a80b57ba9609e843af56354
root@monitor:~ # md5 /boot/kernel/kernel
MD5 (/boot/kernel/kernel) = eb30ceb29a80b57ba9609e843af56354
root@monitor:~ # md5 /boot/kernel/kernel
MD5 (/boot/kernel/kernel) = 7736696cb6e9d90f80fbaf1b267d48bb
root@monitor:~ # md5 /boot/kernel/kernel
MD5 (/boot/kernel/kernel) = eb30ceb29a80b57ba9609e843af56354
root@monitor:~ # md5 /boot/kernel/kernel
MD5 (/boot/kernel/kernel) = eb30ceb29a80b57ba9609e843af56354
root@monitor:~ # md5 /boot/kernel/kernel
MD5 (/boot/kernel/kernel) = ccfd4eef7dd5f0862de3f502af244112
root@monitor:~ # md5 /boot/kernel/kernel
MD5 (/boot/kernel/kernel) = eb30ceb29a80b57ba9609e843af56354
root@monitor:~ # md5 /boot/kernel/kernel
MD5 (/boot/kernel/kernel) = eb30ceb29a80b57ba9609e843af56354

The odd thing is, using openssl with md5 for a checksum yields the same result
everytime.

root@monitor:~ # openssl dgst -md5 /boot/kernel/kernel
MD5(/boot/kernel/kernel)= eb30ceb29a80b57ba9609e843af56354
root@monitor:~ # openssl dgst -md5 /boot/kernel/kernel
MD5(/boot/kernel/kernel)= eb30ceb29a80b57ba9609e843af56354
root@monitor:~ # openssl dgst -md5 /boot/kernel/kernel
MD5(/boot/kernel/kernel)= eb30ceb29a80b57ba9609e843af56354
root@monitor:~ # openssl dgst -md5 /boot/kernel/kernel
MD5(/boot/kernel/kernel)= eb30ceb29a80b57ba9609e843af56354
root@monitor:~ # openssl dgst -md5 /boot/kernel/kernel
MD5(/boot/kernel/kernel)= eb30ceb29a80b57ba9609e843af56354
root@monitor:~ # openssl dgst -md5 /boot/kernel/kernel
MD5(/boot/kernel/kernel)= eb30ceb29a80b57ba9609e843af56354
root@monitor:~ # openssl dgst -md5 /boot/kernel/kernel
MD5(/boot/kernel/kernel)= eb30ceb29a80b57ba9609e843af56354

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