Bug 592417 - ENOPERM when reading /proc/sys/vm/mmap_min_addr
ENOPERM when reading /proc/sys/vm/mmap_min_addr
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel (Show other bugs)
i386 Linux
high Severity medium
: rc
: ---
Assigned To: Eric Paris
CAI Qian
Depends On: 583292
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Reported: 2010-05-14 16:00 EDT by Eric Paris
Modified: 2010-11-10 15:54 EST (History)
11 users (show)

See Also:
Fixed In Version: kernel-2.6.32-28.el6
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: 583292
Last Closed: 2010-11-10 15:54:12 EST
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Eric Paris 2010-05-14 16:00:51 EDT
+++ This bug was initially created as a clone of Bug #583292 +++

Description of problem:
Despite the permissions showing global read access, /proc/sys/vm/mmap_min_addr can not be read by normal users.

Version-Release number of selected component (if applicable): is where I see the issue works fine.

How reproducible:

Steps to Reproduce:
1. Boot using kernel
2. cat /proc/sys/vm/mmap_min_addr
Actual results:
ERROR permission denied

Expected results:
"0" or "4096" or whatever your configuration has.

Additional info:

--- Additional comment from cebbert@redhat.com on 2010-04-21 12:52:51 EDT ---

*** Bug 582810 has been marked as a duplicate of this bug. ***

--- Additional comment from eparis@redhat.com on 2010-05-14 16:00:30 EDT ---

fixed upstream in 2.6.34.  If you need this in an older kernel please reopen this bug and I can backport.
Comment 2 RHEL Product and Program Management 2010-05-17 17:25:43 EDT
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
Comment 3 Aristeu Rozanski 2010-05-20 17:59:11 EDT
Patch(es) available on kernel-2.6.32-28.el6
Comment 6 Hiroto Shibuya 2010-06-16 13:15:34 EDT
This also regressed in 2.16.18 kernel on RHEL 5 between 2.6.18-164.15 and 2.6.18-194.3 kernel.  Exact same symptom as described here. 

It broke "bitbake" for OpenEmbedded development.
Comment 8 Hiroto Shibuya 2010-08-11 22:50:27 EDT
I cloned the original Bug #583292 to Bug #623519 against RHEL 5.
Comment 9 releng-rhel@redhat.com 2010-11-10 15:54:12 EST
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.

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