Bug 6478
| Summary: | rmmod powernow_k8 BUG | ||
|---|---|---|---|
| Product: | Power Management | Reporter: | Ralf Hildebrandt (ralf.hildebrandt) |
| Component: | cpufreq | Assignee: | cpufreq (cpufreq) |
| Status: | CLOSED CODE_FIX | ||
| Severity: | normal | CC: | akpm |
| Priority: | P2 | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Kernel Version: | 2.6.17-rc3-git2 | Subsystem: | |
| Regression: | --- | Bisected commit-id: | |
ah-hah, I think this was the bug which ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.17-rc3/2.6.17-rc3-mm1/broken-out/powernow-k8-crash-workaround.patch was supposed to work around. Does it make this oops go away? Yes, this makes the oops go away. |
Most recent kernel where this bug did not occur: 2.6.17-rc3-mm1 Distribution: Debian/unstable Hardware Environment: AMD Turion(tm) 64 Mobile Technology ML-30 Software Environment: Problem Description: Steps to reproduce: % sync && modprobe powernow_k8 results in powernow-k8: Found 1 AMD Athlon 64 / Opteron processors (version 1.60.2) powernow-k8: 0 : fid 0x0 (800 MHz), vid 0x12 (1100 mV) powernow-k8: 1 : fid 0x8 (1600 MHz), vid 0x4 (1450 mV) cpu_init done, current fid 0x8, vid 0x2 powernow-k8: ph2 null fid transition 0x8 and a subsequent % sync && rmmod powernow_k8 BUG: unable to handle kernel NULL pointer dereference at virtual address 0000002c printing eip: dcda3b09 *pde = 00000000 Oops: 0000 [#1] PREEMPT Modules linked in: powernow_k8 freq_table radeon drm thermal fan button processor ac battery af_packet ide_scsi sata_sil libata scsi_mod eeprom saa7134_dvb mt352 saa7134 compat_ioctl32 v4l2_common v4l1_compat ir_kbd_i2c ir_common videodev video_buf_dvb dvb_core video_buf nxt200x dvb_pll tda1004x usbhid usbmouse tsdev 8250_pci pcmcia firmware_class rt2500 8250 yenta_socket serial_core psmouse evdev rsrc_nonstatic pcmcia_core 8139too ehci_hcd ohci_hcd ide_cd usbcore ati_agp agpgart snd_atiixp_modem snd_atiixp snd_ac97_codec snd_ac97_bus snd_pcm snd_timer snd soundcore snd_page_alloc cdrom unix CPU: 0 EIP: 0060:[<dcda3b09>] Not tainted VLI EFLAGS: 00010286 (2.6.17-rc3-git2 #1) EIP is at acpi_processor_unregister_performance+0x1e/0x3e [processor] eax: 00000000 ebx: da498400 ecx: 00000001 edx: 00000000 esi: da0bed80 edi: 00000286 ebp: da0bee0c esp: d97e8f1c ds: 007b es: 007b ss: 0068 Process rmmod (pid: 5075, threadinfo=d97e8000 task=d7891570) Stack: <0>d02c2dc0 dcdad4e6 da0bed80 da0beda8 c02973d2 c03aef48 c034dd4c c034b01c c034b000 c0275c47 00000880 dcdaf100 00000000 d97e8000 c02960f5 c01366e6 65776f70 776f6e72 00386b5f cf439e34 c0149f89 b7f6a000 dae58900 c014b3b8 Call Trace: <dcdad4e6> powernowk8_cpu_exit+0x26/0x50 [powernow_k8] <c02973d2> cpufreq_remove_dev+0xb2/0x120 <c0275c47> sysdev_driver_unregister+0x67/0x80 <c02960f5> cpufreq_unregister_driver+0x25/0x60 <c01366e6> sys_delete_module+0x146/0x1c0 <c0149f89> remove_vma+0x39/0x50 <c014b3b8> do_munmap+0x198/0x1f0 <c0102f2b> syscall_call+0x7/0xb Code: 01 00 00 31 c0 83 c4 2c 5b 5e 5f 5d c3 53 ff 0d e0 60 da dc 0f 88 f8 01 00 00 8b 1c 95 8c 62 da dc 85 db 74 18 8b 83 6c 02 00 00 <8b> 40 2c e8 0f 26 3b e3 c7 83 6c 02 00 00 00 00 00 00 ff 05 e0 EIP: [<dcda3b09>] acpi_processor_unregister_performance+0x1e/0x3e [processor] SS:ESP 0068:d97e8f1c