| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <200803221858.56408.rjw@sisk.pl> Date: Sat, 22 Mar 2008 18:58:55 +0100 From: "Rafael J. Wysocki" <rjw@...k.pl> To: Thomas Meyer <thomas@...3r.de> Cc: Stefan Richter <stefanr@...6.in-berlin.de>, LKML <linux-kernel@...r.kernel.org>, Adrian Bunk <bunk@...nel.org>, Andrew Morton <akpm@...ux-foundation.org>, Linus Torvalds <torvalds@...ux-foundation.org>, Natalie Protasevich <protasnb@...il.com> Subject: Re: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Reported regressions from 2.6.24) On Saturday, 22 of March 2008, Thomas Meyer wrote: > Stefan Richter schrieb: > > Rafael J. Wysocki wrote: > >> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=10080 > >> Subject : 2.6.25-rc2: ohci1394 problem (MMIO broken) > >> Submitter : Thomas Meyer <thomas@...3r.de> > >> Date : 2008-02-20 08:47 (31 days old) > >> References : http://lkml.org/lkml/2008/2/20/58 > >> Handled-By : Stefan Richter <stefanr@...6.in-berlin.de> > > > > This bug is alas an orphan. It is /not/ handled by me, because it is > > not an IEEE 1394 subsystem bug and I have no idea what to do about it. > > > > Note the following: > > > > - Several or all of ohci1394's MMIO reads return ~0 (all bits set > > to one) --- or 0 --- where different values are expected. > > > > - In http://lkml.org/lkml/2008/2/23/244 we get to see a > > WARNING: at arch/x86/mm/ioremap.c:137 __ioremap+0xa7/0x16a() > > which is "WARN_ON_ONCE(page_is_ram(pfn));". > > After that, the failures start. > > But before that, "Unknown symbol" messages pop up when ohci1394 > > is loaded. These symbols are implemented by ieee1394 on which > > ohci1394 depends. > > > > More context from http://lkml.org/lkml/2008/2/23/244: > > > >> [ 199.908169] ath_pci: wifi0: Atheros 5424/2424: mem=0x94300000, irq=17 > > > > ath_hal taints the kernel. > I removed the ath driver, see bug > http://bugzilla.kernel.org/show_bug.cgi?id=10080. > > > >> [ 847.318678] ohci1394: Unknown symbol hpsb_iso_wake > >> [ 847.318791] ohci1394: Unknown symbol hpsb_resume_host > > ... > > > > Some unexplained build problem. > I moved ohci1394.ko + ieee1394.ko file manually to avoid automatic > loading. then i used insmod on those files and forgot to insmod ieee1394 > first. That's all. This is not related to the bug. > > > >> [ 856.789954] ACPI: PCI Interrupt 0000:0c:03.0[A] -> GSI 19 (level, > >> low) -> IRQ 19 > >> [ 856.790040] ------------[ cut here ]------------ > >> [ 856.790044] WARNING: at arch/x86/mm/ioremap.c:137 > >> __ioremap+0xa7/0x16a() > >> [ 856.790048] Modules linked in: ohci1394(+) ieee1394 wlan_wep > >> wlan_scan_sta ath_rate_sample ath_pci wlan ath_hal(P) firmware_class > >> fuse snd_seq snd_seq_device nls_iso8859_15 nls_cp850 vfat fat usbhid > >> appletouch applesmc input_polldev led_class dummy binfmt_misc tun > >> pktcdvd loop msr cpuid coretemp hwmon eeprom cpufreq_powersave > >> cpufreq_conservative acpi_cpufreq thermal ehci_hcd tpm_infineon > >> i2c_i801 i2c_core tpm uhci_hcd usbcore tpm_bios processor ac battery > >> sr_mod rng_core iTCO_wdt button firewire_ohci firewire_core sg > >> snd_hda_intel snd_pcm snd_timer snd soundcore snd_page_alloc evdev > >> intel_agp cdrom [last unloaded: microcode] > >> [ 856.790119] Pid: 7140, comm: insmod Tainted: P 2.6.25-rc2 > >> #115 > >> [ 856.790125] [<c011e5ab>] warn_on_slowpath+0x40/0x4f > >> [ 856.790143] [<c0118045>] __wake_up+0x29/0x39 > >> [ 856.790154] [<c0277305>] netlink_broadcast+0x26e/0x2af > >> [ 856.790169] [<c01cc36b>] kobject_uevent_env+0x33d/0x361 > >> [ 856.790178] [<c025ef2b>] pci_mmcfg_write+0xc4/0xd5 > >> [ 856.790187] [<c0260157>] raw_pci_write+0x3e/0x46 > >> [ 856.790200] [<c01148f8>] __ioremap+0xa7/0x16a > >> [ 856.790210] [<f8b14425>] ohci1394_pci_probe+0x20c/0x5a6 [ohci1394] > >> [ 856.790226] [<c01d63f1>] pci_device_probe+0x36/0x55 > >> [ 856.790236] [<c02226cb>] driver_probe_device+0x9d/0x114 > > ... > >> [ 856.790598] ---[ end trace 5b0384c17c339107 ]--- > >> [ 856.943807] ohci1394: fw-host0: Get PHY Reg timeout > >> [0x00008400/0x00000000/100] > > > > MMIO read expected 0x00008400, got 0x00000000. > > > > ... > >> [ 921.826439] ohci1394: fw-host0: Unhandled interrupt(s) 0xfc7cfe0c > > > > MMIO read got random bits in the interrupt event register. > > > > ... > >> [ 994.471724] ohci1394: fw-host0: OHCI-1394 0.35 (PCI): IRQ=[19] > >> MMIO=[100000000-1000007ff] Max Packet=[65536] IR/IT contexts=[32/32] > > > > The values for Max Packet and IR/IT contexts came from bogus MMIO reads. > > > > Thomas, you wrote in http://lkml.org/lkml/2008/3/17/316 that the > > problem resurfaced. > > - Are the "Unknown symbol"s still there? These are not supposed to > > happen. > No. (See explanation above). > > - Is the "WARNING: at arch/x86/mm/ioremap.c" still there? > No. I couldn't reproduce this warning, yet. > > > - Can you reproduce it without the atheros driver? > Yes. > > See http://bugzilla.kernel.org/show_bug.cgi?id=10080. > > > > > Rafael, no matter how it looks, this is not "handled-by: me". :-) > > I don't know nothing about kbuild nor about arch/x86/mm nor about WLAN. > > The IEEE 1394 bits in the bug of which I know something about are > > purely accidental. > Seems so. Yes, I tend to forget about it. I'll do my best to remember. Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists