Bug 864504 - smem falls over in the presence of unknown UIDs, which is a problem when using LXC.
smem falls over in the presence of unknown UIDs, which is a problem when usin...
Product: Fedora
Classification: Fedora
Component: smem (Show other bugs)
Unspecified Unspecified
unspecified Severity unspecified
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Assigned To: Matthew Miller
Fedora Extras Quality Assurance
Depends On:
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Reported: 2012-10-09 09:22 EDT by Lars Kellogg-Stedman
Modified: 2012-12-10 20:33 EST (History)
2 users (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2012-12-10 20:33:33 EST
Type: Bug
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)
Allow smem to operate in the presence of unknown UIDs (508 bytes, patch)
2012-10-09 09:22 EDT, Lars Kellogg-Stedman
no flags Details | Diff

  None (edit)
Description Lars Kellogg-Stedman 2012-10-09 09:22:46 EDT
Created attachment 624102 [details]
Allow smem to operate in the presence of unknown UIDs

Description of problem:

smem throws a KeyError exception if it encounters unknown user ids in the process table:

Traceback (most recent call last):
  File "/bin/smem", line 656, in <module>
  File "/bin/smem", line 396, in showusers
    showtable(pt.keys(), fields, columns.split(), options.sort or 'pss')
  File "/bin/smem", line 476, in showtable
    r = [fields[c][1](n) for c in columns]
  File "/bin/smem", line 375, in showuser
    return src.username(u)
  File "/bin/smem", line 63, in username
    self._ucache[uid] = pwd.getpwuid(uid)[0]
KeyError: 'getpwuid(): uid not found: 26'

While this is a rare situation on a legacy server, it is very common on a system using some sort of container-based virtualization such as LXC, where per-process namespaces mean that there's no guarantee that running processes are sharing the same source of user information.

Version-Release number of selected component (if applicable):


Additional information:

The attached patch addresses this problem by generating a name for unknown UIDs of the form "unknown_<uid>" (e.g., "unknown_26").
Comment 1 Fedora Update System 2012-10-29 16:24:04 EDT
smem-1.2-1.fc18 has been submitted as an update for Fedora 18.
Comment 2 Fedora Update System 2012-10-29 16:36:08 EDT
smem-1.2-1.fc17 has been submitted as an update for Fedora 17.
Comment 3 Fedora Update System 2012-10-30 16:15:47 EDT
Package smem-1.2-1.fc18:
* should fix your issue,
* was pushed to the Fedora 18 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing smem-1.2-1.fc18'
as soon as you are able to.
Please go to the following url:
then log in and leave karma (feedback).
Comment 4 Fedora Update System 2012-12-10 20:33:34 EST
smem-1.2-1.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.

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