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Bugzilla – Full Text Bug Listing |
| Summary: | sudo goes into loop closing invalid file descriptors at startup | ||
|---|---|---|---|
| Product: | Sudo | Reporter: | Theo Van Dinter <felicity> |
| Component: | Sudo | Assignee: | Todd C. Miller <Todd.Miller> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | ||
| Priority: | normal | ||
| Version: | 1.6.7 | ||
| Hardware: | Sun | ||
| OS: | All | ||
Fixed in sudo 1.6.8 (which uses closefrom(3)). There's a beta out now you can try if you wish. Fixed in sudo 1.6.8. |
This afternoon I found that I couldn't run sudo in a way that worked last week. Now, when a command is run, sudo would hang at startup. This is on a Solaris 7 machine, BTW. Doing some debugging, I found that sudo was sitting in a close() loop (seen below). Doing a search on Google, I found in the release notes for 1.6.2 that this was an issue on AIX if the limit for # of open files was "unlimited". Sure enough, when I checked, "ulimit - n" reported "unlimited". If I set the number to an actual value, sudo ran the command without any hang as expected. I can reproduce this repeatedly, and here's a summary of my test/debug procedure: in one window: (\#) \u@\h: \w $ uname -a SunOS wile 5.7 Generic_106541-29 sun4u sparc SUNW,Ultra-250 (\#) \u@\h: \w $ sudo -l User foo may run the following commands on this host: (root) NOPASSWD: ALL (\#) \u@\h: \w $ ulimit -n unlimited (\#) \u@\h: \w $ sudo uname -a [hang] from another window: [ran ps|grep to find the sudo pid is 26995 in the first window] $ sudo truss -p 26995 [...] close(2116394580) Err#9 EBADF close(2116394579) Err#9 EBADF close(2116394578) Err#9 EBADF close(2116394577) Err#9 EBADF close(2116394576) Err#9 EBADF close(2116394575) Err#9 EBADF close(2116394574) Err#9 EBADF close(2116394573) Err#9 EBADF close(2116394572) Err#9 EBADF close(2116394571) Err#9 EBADF close(2116394570) Err#9 EBADF close(2116394569) Err#9 EBADF [...] $ sudo kill 26995 back to first window: Terminated (\#) \u@\h: \w $ (\#) \u@\h: \w $ ulimit -n 64 (\#) \u@\h: \w $ sudo uname -a SunOS wile 5.7 Generic_106541-29 sun4u sparc SUNW,Ultra-250 (\#) \u@\h: \w $ sudo -V Sudo version 1.6.7p5 I did several searches for the original bug for AIX/1.6.2, but couldn't find it, so I'm opening a new ticket about this.