Description of problem: When haldaemon starts up during boot, we sometimes (regularly) see: general protection fault: 0000 [#1] SMP last sysfs file: /sys/devices/pci0000:00/0000:00:0f.3/sound/card0/pcmC0D0c/pcm_class ... Call Trace: [<cfc17320>] ? snd_pcm_proc_info_read+0x45/0x131 [snd_pcm] [<cfc1741f>] ? snd_pcm_stream_proc_info_read+0x13/0x15 [snd_pcm] [<cfafc8d8>] ? snd_info_entry_open+0x1d9/0x24b [snd] Version-Release number of selected component (if applicable): Rawhide, 20090510. How reproducible: Sporadically. Additional info: Since haldaemon doesn't start, X doesn't get any input devices, and the system isn't usable. This is a recent regression, since the beta image. Full dmesg attached.
Created attachment 343308 [details] dmesg log
You've got a series of NULL bytes with just 4 bytes of non-null insn at the faulting address: 00000000 <.text>: 0: 9a ad 7e f0 00 00 00 lcall $0x0,$0xf07ead But this is what's supposed to be there: 3adc: 55 push %ebp 3add: 89 e5 mov %esp,%ebp 3adf: 57 push %edi 3ae0: 56 push %esi 3ae1: 53 push %ebx 3ae2: 83 ec 08 sub $0x8,%esp 3ae5: e8 fc ff ff ff call 3ae6 <snd_pcm_info+0xa> 3ae6: R_386_PC32 mcount 3aea: b9 48 00 00 00 mov $0x48,%ecx 3aef: 89 45 ec mov %eax,-0x14(%ebp) I'd guess something has gone wrong with the tracing code given the call to mcount at that address (the fault is actually at the place where the address of mcount sits.)
Hi Chuck, Sure enough, there's an ftrace BUG() earlier in the dmesg: ftrace failed to modify [<cfc19c37>] 0xcfc19c37 actual: 00:48:ac:7e:f0 Has something like this been reported elsewhere? Thanks.
The stack trace is unreliable because it seems the function prologue of snd_pcm_info() never ran. And it's consistent with snd_pcm_proc_info_read() having made a call directly to the faulting address instead of to the start of the called function. A full kernel dump might be the only way to gather more evidence at this point.
This bug appears to have been reported against 'rawhide' during the Fedora 11 development cycle. Changing version to '11'. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
This message is a reminder that Fedora 11 is nearing its end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 11. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as WONTFIX if it remains open with a Fedora 'version' of '11'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version prior to Fedora 11's end of life. Bug Reporter: Thank you for reporting this issue and we are sorry that we may not be able to fix it before Fedora 11 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora please change the 'version' of this bug to the applicable version. If you are unable to change the version, please add a comment here and someone will do it for you. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. The process we are following is described here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
Fedora 11 changed to end-of-life (EOL) status on 2010-06-25. Fedora 11 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed.