Bug#404834: linux-image-2.6.18-3-sparc64: Kernel unaligned access kills at least sshfs (and may make USB unreliable)
Package: linux-image-2.6.18-3-sparc64
Version: 2.6.18-8
Severity: critical
Tags: patch
Justification: breaks unrelated software
Hi,
at first: if the severity may seem inflated feel free to adjust it.
Well start with the easy things: my hardware is an old Sun Ultra 5. I
added an USB 2.0 controller because I do not have a type 6 mouse, only a
keyboard (output of lspci concerning the controller):
02:03.0 USB Controller: NEC Corporation USB (rev 41)
02:03.1 USB Controller: NEC Corporation USB (rev 41)
02:03.2 USB Controller: NEC Corporation USB 2.0 (rev 02)
The mouse works but at boot I get this:
Kernel unaligned access at TPC[1000c9e4] ehci_hub_control+0x54c/0x68c [ehci_hcd]
Kernel unaligned access at TPC[1000c9e4] ehci_hub_control+0x54c/0x68c [ehci_hcd]
Kernel unaligned access at TPC[1000c9e4] ehci_hub_control+0x54c/0x68c [ehci_hcd]
Kernel unaligned access at TPC[1000c9e4] ehci_hub_control+0x54c/0x68c [ehci_hcd]
Kernel unaligned access at TPC[1000c9e4] ehci_hub_control+0x54c/0x68c [ehci_hcd]
According to http://lkml.org/lkml/2006/9/22/326
>> A 2.6.18-rc kernel compiled with gcc-4.1.1 will throw a few
>> unaligned accesses when I initialise USB by inserting a USB memory stick.
>> Removing the memory stick then results in PCI errors and other breakage.
Well, I do not have any USB mass media which is dispensible and as this
may (or may not) kill data I opted not to try.
A patch is included in http://lkml.org/lkml/2006/9/23/184:
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index fb4d058..7766d7b 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -344,7 +344,8 @@ static int rh_call_control (struct usb_h
struct usb_ctrlrequest *cmd;
u16 typeReq, wValue, wIndex, wLength;
u8 *ubuf = urb->transfer_buffer;
- u8 tbuf [sizeof (struct usb_hub_descriptor)];
+ u8 tbuf [sizeof (struct usb_hub_descriptor)]
+ __attribute__((aligned(4)));
const u8 *bufp = tbuf;
int len = 0;
int patch_wakeup = 0;
I compiled a kernel with this patch (wrecked a harddisk while doing
this, but this is almost 100% certainly not related) and the messages
disappears.
But as I tried to use sshfs to access another computer on my net this
happened:
$ unset LANG
$ echo $LANG
$ sshfs smc@phobos:/home/smc phobos/
Kernel unaligned access at TPC[5d3770] scm_detach_fds_compat+0x74/0x16c
Kernel unaligned access at TPC[5d37dc] scm_detach_fds_compat+0xe0/0x16c
Kernel unaligned access at TPC[5d37f8] scm_detach_fds_compat+0xfc/0x16c
Kernel unaligned access at TPC[5d3810] scm_detach_fds_compat+0x114/0x16c
Bus-Zugriffsfehler
$ ls phobos
ls: phobos: Transport endpoint is not connected
$ ls
total 12
drwxr-xr-x 6 smc smc 4096 Dec 28 13:22 GNUstep/
drwx------ 5 smc smc 4096 Dec 28 14:13 Maildir/
?--------- ? ? ? ? ? phobos
The mountpoint is unusable (but luckily unmountable via fusermount -u).
I guess the same problem as above applies BUT I DO NOT HAVE ANY KERNEL
EXPERTISE WHATSOEVER!
If there is anything I can do to help please let me know!
Greetings,
Sebastian Fontius
-- System Information:
Debian Release: 4.0
APT prefers testing
APT policy: (550, 'testing'), (50, 'unstable'), (40, 'experimental')
Architecture: sparc (sparc64)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-3-sparc64
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Versions of packages linux-image-2.6.18-3-sparc64 depends on:
ii coreutils 5.97-5 The GNU core utilities
ii debconf [debconf-2.0] 1.5.11 Debian configuration management sy
ii initramfs-tools [linux-initra 0.85e tools for generating an initramfs
ii module-init-tools 3.3-pre3-1 tools for managing Linux kernel mo
linux-image-2.6.18-3-sparc64 recommends no packages.
-- debconf information:
linux-image-2.6.18-3-sparc64/preinst/lilo-has-ramdisk:
linux-image-2.6.18-3-sparc64/preinst/lilo-initrd-2.6.18-3-sparc64: true
linux-image-2.6.18-3-sparc64/postinst/bootloader-error-2.6.18-3-sparc64:
linux-image-2.6.18-3-sparc64/preinst/initrd-2.6.18-3-sparc64:
linux-image-2.6.18-3-sparc64/prerm/would-invalidate-boot-loader-2.6.18-3-sparc64: true
shared/kernel-image/really-run-bootloader: true
* linux-image-2.6.18-3-sparc64/preinst/already-running-this-2.6.18-3-sparc64:
linux-image-2.6.18-3-sparc64/postinst/bootloader-test-error-2.6.18-3-sparc64:
linux-image-2.6.18-3-sparc64/postinst/old-initrd-link-2.6.18-3-sparc64: true
linux-image-2.6.18-3-sparc64/preinst/failed-to-move-modules-2.6.18-3-sparc64:
linux-image-2.6.18-3-sparc64/postinst/old-dir-initrd-link-2.6.18-3-sparc64: true
linux-image-2.6.18-3-sparc64/preinst/elilo-initrd-2.6.18-3-sparc64: true
linux-image-2.6.18-3-sparc64/preinst/bootloader-initrd-2.6.18-3-sparc64: true
linux-image-2.6.18-3-sparc64/preinst/overwriting-modules-2.6.18-3-sparc64: true
linux-image-2.6.18-3-sparc64/postinst/depmod-error-initrd-2.6.18-3-sparc64: false
linux-image-2.6.18-3-sparc64/postinst/create-kimage-link-2.6.18-3-sparc64: true
linux-image-2.6.18-3-sparc64/preinst/abort-overwrite-2.6.18-3-sparc64:
linux-image-2.6.18-3-sparc64/postinst/old-system-map-link-2.6.18-3-sparc64: true
linux-image-2.6.18-3-sparc64/preinst/abort-install-2.6.18-3-sparc64:
linux-image-2.6.18-3-sparc64/prerm/removing-running-kernel-2.6.18-3-sparc64: true
linux-image-2.6.18-3-sparc64/postinst/kimage-is-a-directory:
linux-image-2.6.18-3-sparc64/postinst/depmod-error-2.6.18-3-sparc64: false
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