Tracking down semaphore usage/leak

Tracking down semaphore usage/leak

[Ken Brownfield]

With RedHat's new Samba 2.0.10 RPM (the one to patch the latest 
vulnerability) they seem to have sniffed enough glue to start using SysV 
IPC semaphores which apparently leak until SEM??? are reached.  semget() 
is returning "No space left on device", and disk/inodes/memory are all 
fine.

Anyway, could someone give me a very quick rundown of the options for 
tracking/force-freeing semaphores, or how to determine from proc, if 
possible, what the current semaphore allocation status is?  Or did RH 
slay a machine I really don't want to reboot?  I've restarted all 
semaphore-using processes to no avail, but even so the SEM??? limits are 
far above the normal needs of this machine.

Thanks much.  Searched the archives/Google/FAQ/semaphore docs; sorry if 
it's been covered.  I'll summarize if folks want to hit me on or off the 
list.
--
Ken.
brownfld@irridia.com

Re: Tracking down semaphore usage/leak

[Ken Brownfield]

Urgh, learn something new everyday (ipcs, ipcrm).  My apologies; apropos
didn't catch it on my boxes. :-(
-- 
Ken.
brownfld@irridia.com

On Tue, Jun 26, 2001 at 02:09:16PM -0700, Ken Brownfield wrote:
| With RedHat's new Samba 2.0.10 RPM (the one to patch the latest 
| vulnerability) they seem to have sniffed enough glue to start using SysV 
| IPC semaphores which apparently leak until SEM??? are reached.  semget() 
| is returning "No space left on device", and disk/inodes/memory are all 
| fine.
| 
| Anyway, could someone give me a very quick rundown of the options for 
| tracking/force-freeing semaphores, or how to determine from proc, if 
| possible, what the current semaphore allocation status is?  Or did RH 
| slay a machine I really don't want to reboot?  I've restarted all 
| semaphore-using processes to no avail, but even so the SEM??? limits are 
| far above the normal needs of this machine.
| 
| Thanks much.  Searched the archives/Google/FAQ/semaphore docs; sorry if 
| it's been covered.  I'll summarize if folks want to hit me on or off the 
| list.
| --
| Ken.
| brownfld@irridia.com