Chuck Ebbert, Sat, Sep 08, 2007 01:14:01 +0200:
> On 09/07/2007 03:56 PM, Alex Riesen wrote:
> > Kernel: v2.6.23-rc5+ (b21010ed6498391c0f359f2a89c907533fe07fec)
> > Ubuntu Feisty, Radeon R200 (9200) dual head, MergedFB, BZFlag in
> > OpenGL mode, frozen. That'll teach me playing games at home...
> >
> > BUG: unable to handle kernel paging request at virtual address ffa85000
> > printing eip:
> > c016eed1
> > *pde = 00005067
> > *pte = 00000000
> > Oops: 0000 [#1]
> > PREEMPT SMP
> > Modules linked in: binfmt_misc nfs radeon drm nfsd exportfs lockd sunrpc fan firmware_class it87 hwmon_vid hwmon p4_clockmod speedstep_lib ipv6 sg sr_mod cdrom usb_storage snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_pcm snd_mixer_oss snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device generic floppy snd ide_core intel_agp e100 uhci_hcd ehci_hcd soundcore snd_page_alloc agpgart evdev
> > CPU: 0
> > EIP: 0060:[__link_path_walk+2146/2867] Not tainted VLI
> > EFLAGS: 00010287 (2.6.23-rc5-t #138)
> > EIP is at __link_path_walk+0x862/0xb33
> > eax: ffa85000 ebx: f0a4dd64 ecx: c0442130 edx: c1782d00
> > esi: eee51f30 edi: ffa85000 ebp: f0e49e40 esp: eee51de4
> > ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068
> > Process command-not-fou (pid: 2895, ti=eee51000 task=f08f1020 task.ti=eee51000)
> > Stack: f474c02c 00000101 f1db2d64 c016d3eb c1782d00 ffa85000 00000000 00000000
> > 00000000 96ba5598 0000000b f474c021 c18eff00 f0e49e40 f08e1540 eee51f30
> > c1937c78 c18eff00 c016f1e6 f474c000 c1937c78 c18eff00 c180b180 f11a7600
> > Call Trace:
> > [do_lookup+79/323] do_lookup+0x4f/0x143
> > [link_path_walk+68/179] link_path_walk+0x44/0xb3
> > [_spin_unlock+5/28] _spin_unlock+0x5/0x1c
> > [get_unused_fd_flags+198/208] get_unused_fd_flags+0xc6/0xd0
> > [do_path_lookup+362/463] do_path_lookup+0x16a/0x1cf
> > [__path_lookup_intent_open+69/117] __path_lookup_intent_open+0x45/0x75
> > [path_lookup_open+32/37] path_lookup_open+0x20/0x25
> > [open_namei+114/1364] open_namei+0x72/0x554
> > [unmap_vmas+791/1240] unmap_vmas+0x317/0x4d8
> > [do_filp_open+37/57] do_filp_open+0x25/0x39
> > [_spin_unlock+5/28] _spin_unlock+0x5/0x1c
> > [get_unused_fd_flags+198/208] get_unused_fd_flags+0xc6/0xd0
> > [do_sys_open+68/192] do_sys_open+0x44/0xc0
> > [sys_open+28/30] sys_open+0x1c/0x1e
> > [sysenter_past_esp+95/133] sysenter_past_esp+0x5f/0x85
> > [xfrm_bundle_ok+53/522] xfrm_bundle_ok+0x35/0x20a
> > =======================
> > Code: f0 ff ff 0f 87 38 01 00 00 8b 46 1c 8b 44 86 20 89 44 24 14 31 ff 85 c0 0f 84 09 01 00 00 89 c7 3d 00 f0 ff ff 0f 87 f5 00 00 00 <80> 38 2f 0f 85 9f 00 00 00 89 f0 e8 38 e1 ff ff 64 a1 00 70 3f
> > EIP: [__link_path_walk+2146/2867] __link_path_walk+0x862/0xb33 SS:ESP 0068:eee51de4
>
> Whee...
>
> here, in __vfs_follow_link:
>
> if (*link == '/') { <================ link points to unmapped memory
> path_release(nd);
> if (!walk_init_root(link, nd))
> /* weird __emul_prefix() stuff did it */
> goto out;
> }
>
> inlined from __do_follow_link:
>
> if (!IS_ERR(cookie)) {
> char *s = nd_get_link(nd);
> error = 0;
> if (s)
> error = __vfs_follow_link(nd, s);
> if (dentry->d_inode->i_op->put_link)
> dentry->d_inode->i_op->put_link(dentry, nd, cookie);
> }
>
> __do_follow_link is inlined from do_follow_link
>
> presumably inlined here:
>
> if ((lookup_flags & LOOKUP_FOLLOW)
> && inode && inode->i_op && inode->i_op->follow_link) {
> err = do_follow_link(&next, nd);
> if (err)
> goto return_err;
> inode = nd->dentry->d_inode;
> } else
>
> What filesystem was this?
Presumably ext3 (because it is where command-not-found python script
is), but I usually have the following mounted:
/dev/sda9 on / type ext3 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
/sys on /sys type sysfs (rw,noexec,nosuid,nodev)
varrun on /var/run type tmpfs (rw,noexec,nosuid,nodev,mode=0755)
varlock on /var/lock type tmpfs (rw,noexec,nosuid,nodev,mode=1777)
procbususb on /proc/bus/usb type usbfs (rw)
udev on /dev type tmpfs (rw,mode=0755)
devshm on /dev/shm type tmpfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
/dev/sda8 on /home type ext3 (rw)
/dev/sda1 on /media/sda1 type ext2 (rw)
/dev/sda2 on /media/sda2 type ext3 (rw)
/dev/sda5 on /media/sda5 type ext3 (rw)
/dev/sda7 on /media/sda7 type ext3 (rw)
nfsd on /proc/fs/nfsd type nfsd (rw)
rpc_pipefs on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
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