Red Hat Bugzilla – Full Text Bug Listing
|Summary:||Access to /proc/bus/usb/devices hangs the kernel|
|Product:||[Fedora] Fedora||Reporter:||Alan Cox <alan>|
|Component:||kernel||Assignee:||Pete Zaitcev <zaitcev>|
|Status:||CLOSED RAWHIDE||QA Contact:||Brian Brock <bbrock>|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2004-10-16 17:45:16 EDT||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
|Bug Depends On:|
|Bug Blocks:||123268, 130887|
Description Alan Cox 2004-10-09 14:13:13 EDT
Description of problem: At any point after a USB timeout occurs (as they tend to do plugging devices) the USB devices file access hang the system deadlocked on a semaphore. This has horrible consequences One test setup shows this during boot up so Anaconda hangs and you cannot install. A second shows it when the monitor (with USB hub) powers down. After that anything touching the USB devices file hangs the box. Thirdly you can cause it to order as a user by inserting and quickly removing a device, killing the hal layer and rendering the box unusable without even having login access to it. This bug appears to have arrived between 2.6.6 and 2.6.7 somewhere.
Comment 1 Alan Cox 2004-10-09 14:15:16 EDT
This also btw seems to cause some of the kudzu hangs people see.
Comment 2 Bill Nottingham 2004-10-11 10:43:44 EDT
Can you reproduce with .603, or even BK head?
Comment 3 Alan Cox 2004-10-11 10:49:57 EDT
Its present in current 2.6.9-rc snapshots too. Came in between 2.6.6 and 2.6.7 somewhere.
Comment 4 Alan Cox 2004-10-15 11:26:11 EDT
Done some more digging I cannot reproduce this with 188.8.131.52 vanilla, only various RH builds so it looks like something that is specific to our tree. WIll test .603 for completeness
Comment 5 Alan Cox 2004-10-15 12:01:50 EDT
*** Bug 134026 has been marked as a duplicate of this bug. ***
Comment 6 Alan Cox 2004-10-15 12:04:37 EDT
Propogating block from dup
Comment 7 Alan Cox 2004-10-16 17:45:16 EDT
541 has the buggy change - 624 is ok