Package: libasound2 Version: 1.0.9-2 Severity: normal I realize that I might have failed this bug against gnome-alsamixer instead, but I believe that the library shouldn't go into an unterminated recursion even if it is misused. And I don't even know for sure that it is misused, so...
On my PowerBook 5,6 gnome-alsamixer shows a control 'Headphone Detection' (this is kernel 2.6.12-rc5). When I try to check it, gnome-alsamixer segfaults. Further investigating this problem, it appears that within libasound2 there is some recursion: Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 16384 (LWP 6744)] 0x0f03f1d8 in ioctl () from /lib/libc.so.6 (gdb) (gdb) bt #0 0x0f03f1d8 in ioctl () from /lib/libc.so.6 #1 0x0f2332c4 in snd_ctl_elem_value_set_iec958 () from /usr/lib/libasound.so.2 #2 0x0f2332c4 in snd_ctl_elem_value_set_iec958 () from /usr/lib/libasound.so.2 [... I gave up trying to get something relevant after seeing the next line ...] #11385 0x0f2332c4 in snd_ctl_elem_value_set_iec958 () from /usr/lib/libasound.so.2 even putting a breakpoint on snd_ctl_elem_value_set_iec958 didn't help. stracing it yields: [...] ioctl(16, USBDEVFS_HUB_PORTINFO, 0x7f031c10) = -1 EPERM (Operation not permitted) ioctl(16, USBDEVFS_IOCTL, 0x7f031300) = 0 ioctl(16, USBDEVFS_HUB_PORTINFO, 0x7f031300) = -1 EPERM (Operation not permitted) ioctl(16, USBDEVFS_IOCTL, 0x7f0309f0) = 0 ioctl(16, USBDEVFS_HUB_PORTINFO, 0x7f0309f0) = -1 EPERM (Operation not permitted) --- SIGSEGV (Segmentation fault) @ 0 (0) --- --- SIGSEGV (Segmentation fault) @ 0 (0) --- +++ killed by SIGSEGV +++ Note how the values passed memory location is increasing all the time. From /proc/pid/maps I found that this location is the stack (which I suppose should have been obvious to me, but I didn't really think about it). Now, since there's apparently some usb stuff involved, I'll attach /proc/bus/usb/devices as well /proc/asound/cards. If you need anything else let me know. -- System Information: Debian Release: testing/unstable APT prefers unstable APT policy: (500, 'unstable'), (1, 'experimental') Architecture: powerpc (ppc) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.12-rc5 Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Versions of packages libasound2 depends on: ii libc6 2.3.5-1 GNU C Library: Shared libraries an libasound2 recommends no packages. -- no debconf information
T: Bus=04 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 5 B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0 D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS= 8 #Cfgs= 1 P: Vendor=0000 ProdID=0000 Rev= 2.06 S: Manufacturer=Linux 2.6.12-rc5 ehci_hcd S: Product=NEC Corporation USB 2.0 S: SerialNumber=0001:10:1b.2 C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=256ms T: Bus=03 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2 B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0 D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 P: Vendor=0000 ProdID=0000 Rev= 2.06 S: Manufacturer=Linux 2.6.12-rc5 ohci_hcd S: Product=NEC Corporation USB (#2) S: SerialNumber=0001:10:1b.1 C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 0mA I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 3 B: Alloc= 11/900 us ( 1%), #Int= 1, #Iso= 0 D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 P: Vendor=0000 ProdID=0000 Rev= 2.06 S: Manufacturer=Linux 2.6.12-rc5 ohci_hcd S: Product=NEC Corporation USB S: SerialNumber=0001:10:1b.0 C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 0mA I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms T: Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=1.5 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 P: Vendor=046d ProdID=c00e Rev=11.10 S: Manufacturer=Logitech S: Product=USB-PS/2 Optical Mouse C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr= 98mA I: If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=02 Driver=usbhid E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=10ms T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2 B: Alloc= 81/900 us ( 9%), #Int= 4, #Iso= 2 D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 P: Vendor=0000 ProdID=0000 Rev= 2.06 S: Manufacturer=Linux 2.6.12-rc5 ohci_hcd S: Product=Apple Computer Inc. KeyLargo/Intrepid USB (#2) S: SerialNumber=0001:10:1a.0 C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 0mA I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 7 Spd=12 MxCh= 0 D: Ver= 2.00 Cls=e0(unk. ) Sub=01 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=05ac ProdID=8205 Rev=17.92 C:* #Ifs= 3 Cfg#= 1 Atr=e0 MxPwr= 0mA I: If#= 0 Alt= 0 #EPs= 3 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=1ms E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms I: If#= 1 Alt= 0 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(unk. ) Sub=01 Prot=01 Driver=hci_usb E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms I: If#= 2 Alt= 0 #EPs= 0 Cls=fe(app. ) Sub=01 Prot=00 Driver=(none) T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#= 6 Spd=12 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 P: Vendor=05ac ProdID=020e Rev= 0.28 S: Manufacturer=Apple Computer S: Product=Apple Internal Keyboard/Trackpad C:* #Ifs= 3 Cfg#= 1 Atr=a0 MxPwr= 40mA I: If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=01 Driver=usbhid E: Ad=83(I) Atr=03(Int.) MxPS= 8 Ivl=10ms I: If#= 1 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=02 Driver=atp E: Ad=81(I) Atr=03(Int.) MxPS= 32 Ivl=1ms I: If#= 2 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=00 Prot=00 Driver=usbhid E: Ad=84(I) Atr=03(Int.) MxPS= 1 Ivl=10ms
0 [Snapper ]: PMac Snapper - PowerMac Snapper
PowerMac Snapper (Dev 0) Sub-frame 0
signature.asc
Description: This is a digitally signed message part
