Description of Problem: After loading the NUT ups driver (/sbin/upsdrvctl start) the kernel will crash within less than 1 minute. All network connections are severed. If I leave the console screen displayed (Ctrl-Alt-F1) before I load UPS controller, I can see the kernel dump (many pages using shift-PageUp/Down). Ctrl-Alt-Del at this point causes total lockup and I must use hard reset or power off to reboot. The NUT driver configuration is: [TL-OMNI1000LCD] driver = usbhid-ups port = auto desc = "TrippLite Omni 1000" Version-Release number of selected component (if applicable): nut-2.2.2-1.fc9 kernel-2.6.25.9-76.fc9 & kernel-2.6.25.6-55.fc9 How reproducible: Steps to Reproduce: 1. Connected TrippLite Omni 1000 to USB port 2. Power up and boot machine 3. At console: /sbin/upsdrvctl start 4. Wait 1-2 minutes Actual results: Kernel crashes with BUG... Expected results: normal operation Additional info: Please request any additional information. Thanks, Marty
This looks very strange -- usbhid-ups is probably the most frequently used nut driver and no such problem has ever been reported. I believe this a kernel problem. Reassigning.
We need to see the entire BUG message. Boot with option vga=1 or vga=792 and take a picture of the screen with a camera if you have to.
Created attachment 311726 [details] Screen photos after crash Crash dumped many screen pages every 30-60 seconds. I tried to get as many as I could before system totally locked up.
I also tried to duplicate the problem on another machine (same kernel/os etc), but could not replicate it. Only difference was the processor (Intel). The machine that is crashing is an Athlon XP 2500+.
Created attachment 312210 [details] screen shot 1
Created attachment 312211 [details] screen shot 2
Created attachment 312212 [details] screen shot 3
slab_alloc(): /usr/src/debug/kernel-2.6.25/linux-2.6.25.i686/mm/slub.c:1581 c047ece6: 8b 1f mov (%edi),%ebx c047ece8: 85 db test %ebx,%ebx c047ecea: 74 0a je c047ecf6 <kmem_cache_alloc+0x45> /usr/src/debug/kernel-2.6.25/linux-2.6.25.i686/mm/slub.c:1587 c047ecec: 8b 47 0c mov 0xc(%edi),%eax c047ecef: 8b 04 83 mov (%ebx,%eax,4),%eax <======== c047ecf2: 89 07 mov %eax,(%edi) c047ecf4: eb 14 jmp c047ed0a <kmem_cache_alloc+0x59> /usr/src/debug/kernel-2.6.25/linux-2.6.25.i686/mm/slub.c:1583 c047ecf6: 57 push %edi c047ecf7: 8b 45 f0 mov -0x10(%ebp),%eax c047ecfa: 83 c9 ff or $0xffffffff,%ecx c047ecfd: 52 push %edx c047ecfe: 8b 55 ec mov -0x14(%ebp),%edx c047ed01: e8 29 f6 ff ff call c047e32f <__slab_alloc> c047ed06: 59 pop %ecx c047ed07: 89 c3 mov %eax,%ebx c047ed09: 58 pop %eax
1580 c = get_cpu_slab(s, smp_processor_id()); if (unlikely(!c->freelist || !node_match(c, node))) object = __slab_alloc(s, gfpflags, node, addr, c); else { object = c->freelist; c->freelist = object[c->offset]; stat(c, ALLOC_FASTPATH); }
c->freelist == 1 c->offset == 0
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