| PaulePanter | Hi. | 09:02 |
|---|---|---|
| PaulePanter | cjwatson referred me to here from #grub-pc. | 09:02 |
| PaulePanter | Upgrading to 1.99-21ubuntu3.15 on Ubuntu precise (12.04.4 LTS) causes a segmentation fault. | 09:02 |
| PaulePanter | grub-setup[30142]: segfault at 400688d18 ip 0000000000438d44 sp 00007fffac5532d0 error 4 in grub-setup[400000+5b000] | 09:02 |
| PaulePanter | As I do not have my Launchpad credentials here right now, I am reporting this to you in here. | 09:03 |
| cjwatson | I'll need the full crash file. | 09:04 |
| cjwatson | I can't do anything with just that. | 09:04 |
| cjwatson | Please report it to the error tracker so that I get a retraced version. | 09:04 |
| PaulePanter | Here is the log http://paste.debian.net/107725/ . | 09:05 |
| PaulePanter | cjwatson: By error tracker do you mean Launchpad? | 09:05 |
| cjwatson | No, I mean errors.ubuntu.com - are you on a desktop system? if so you should have had a dialog pop up about the crash | 09:05 |
| cjwatson | There should be a file in /var/crash/, at least | 09:06 |
| PaulePanter | cjwatson: No that is on a production server. | 09:06 |
| cjwatson | There should still be something in /var/crash/, then | 09:07 |
| PaulePanter | $ ls /var/crash | 09:07 |
| PaulePanter | ls: cannot access /var/crash: No such file or directory | 09:07 |
| PaulePanter | Do I need corekeeper or something like this? | 09:08 |
| cjwatson | No | 09:08 |
| PaulePanter | Some ulimit setting to store core dump files? | 09:08 |
| cjwatson | Can you figure out the grub-setup command being run (grub-install --debug <whatever> should help) and run it under gdb? | 09:08 |
| cjwatson | What does /etc/default/apport say? | 09:09 |
| cjwatson | Does it include a command for temporarily enabling apport? If so, run that, then try again | 09:10 |
| cjwatson | (before trying gdb) | 09:10 |
| PaulePanter | /etc/default/apport does not exist. | 09:11 |
| PaulePanter | I’ll install apport. | 09:11 |
| cjwatson | There are a few crashes on the error tracker, but unfortunately none with tracebacks | 09:13 |
| PaulePanter | cjwatson: Apport installed and /var/crash/_usr_lib_grub_i386-pc_grub-setup.0.crash is there after running `aptitude reinstall grub-pc`. | 09:14 |
| PaulePanter | Hmm that is not a core dump file. | 09:16 |
| cjwatson | Expected. | 09:16 |
| cjwatson | Can I at least see the raw .crash file to start with? | 09:16 |
| cjwatson | (Also you can probably just use "dpkg --configure grub-pc", which I'm sure will be quicker.) | 09:17 |
| PaulePanter | cjwatson: Thanks. | 09:17 |
| PaulePanter | cjwatson: Do I have to log in on https://errors.ubuntu.com/ to post something? | 09:17 |
| cjwatson | There's a special client for posting things there, but could I please just have the crash file on a pastebin or something for now? | 09:18 |
| PaulePanter | http://paste.ubuntu.com/7735795/ | 09:18 |
| PaulePanter | cjwatson: Sorry for taking so long. I am not used to the Ubuntu tools. | 09:18 |
| PaulePanter | cjwatson: With you highlighted: http://paste.ubuntu.com/7735795/ | 09:21 |
| cjwatson | One moment. | 09:22 |
| PaulePanter | Sure. Just wanted to make sure you did not miss it. | 09:23 |
| cjwatson | Grr, this is really cumbersome in 12.04, because it's missing /usr/share/apport/whoopsie-upload-all. Let me see if I can retrace this manually | 09:32 |
| PaulePanter | cjwatson: Please tell me if I can do something on my end. | 09:36 |
| cjwatson | Argh, why do we have no debugging symbols worth mentioning for grub2? One of these days I must figure this out | 09:46 |
| cjwatson | PaulePanter: Please could you run "/usr/sbin/grub-setup --force --directory=/boot/grub --device-map=/boot/grub/device.map -vv /dev/md1" and show me the output? | 09:47 |
| cjwatson | (That's the command that grub-install was running, with -vv added.) | 09:47 |
| PaulePanter | cjwatson: http://paste.ubuntu.com/7735942/ | 09:50 |
| PaulePanter | cjwatson: That did *not* crash with any segmentation fault. | 09:51 |
| cjwatson | Blink | 09:52 |
| cjwatson | PaulePanter: When will you have access to your Launchpad credentials so that you can file a bug about this? I'll need a bug for stable update tracking once I get to the bottom of this, and it would be easiest if you filed it so that you can verify the fix. | 09:53 |
| PaulePanter | cjwatson: In 10 hours or so. | 09:54 |
| cjwatson | I've managed to get a gdb trace, at least, but it has no symbols so I'm going to need to do a local build in order to get something I can actually inspect sensibly | 09:54 |
| cjwatson | PaulePanter: OK, that would be helpful, thanks. I probably have about as much information as I need at this point | 09:54 |
| PaulePanter | cjwatson: Without the switch `-vv` it crashes. | 09:55 |
| PaulePanter | $ sudo /usr/sbin/grub-setup --force --directory=/boot/grub --device-map=/boot/grub/device.map /dev/md1 | 09:55 |
| cjwatson | How about with just -v | 09:55 |
| cjwatson | ? | 09:55 |
| PaulePanter | $ echo $? | 09:55 |
| PaulePanter | 139 | 09:55 |
| PaulePanter | cjwatson: Sorry. That was wrong. | 09:56 |
| PaulePanter | It crashes in all three cases. I was just confused that I was not reported a crash on the console. | 09:56 |
| PaulePanter | Probably due to using `sudo`. No idea. | 09:56 |
| PaulePanter | Anyway, all crashes are logged in the Linux kernel ring buffer (dmesg). | 09:56 |
| PaulePanter | Also for whatever reason no crash files were created for these in `/var/crash/`. | 09:58 |
| cjwatson | Possibly just because one already existed. | 10:01 |
| cjwatson | Miracles will never cease. I build this locally and get the same object code offsets. | 10:19 |
| cjwatson | #0 open (__oflag=0, __path=<error reading variable: Cannot access memory at address 0x400688d18>) at /usr/include/x86_64-linux-gnu/bits/fcntl2.h:54 | 10:22 |
| cjwatson | #1 grub_util_biosdisk_is_floppy (disk=0x179b9c0) at ../../grub-core/kern/emu/hostdisk.c:2093 | 10:22 |
| cjwatson | #2 0x000000000040408c in setup (dir=0x1439390 "/boot/grub", boot_file=<optimized out>, core_file=0x4442e0 "core.img", root=<optimized out>, dest=<optimized out>, must_embed=0, force=1, fs_probe=1, allow_floppy=0) at ../../util/grub-setup.c:319 | 10:22 |
| cjwatson | #3 0x0000000000402dda in main (argc=<optimized out>, argv=<optimized out>) at ../../util/grub-setup.c:1009 | 10:22 |
| cjwatson | PaulePanter: What was the last version that worked? | 10:24 |
| cjwatson | As far as I can see, 1.99-21ubuntu3.15 didn't change any code that's run before this point. | 10:24 |
| cjwatson | Although 1.99-21ubuntu3.14 potentially did. | 10:25 |
| PaulePanter | cjwatson: I do not remember ever having seen that issue before. 1.99-21ubuntu3.14 was upgraded to before. | 10:27 |
| cjwatson | .15 only affected disk write code (and some unrelated terminal handling stuff); at the point of this crash grub-setup hasn't tried to write anything yet ... | 10:29 |
| cjwatson | I suspect http://git.savannah.gnu.org/gitweb/?p=grub.git;a=commitdiff;h=69915030942771f6813ebc238e86e05b5112f3b5 will fix this though. | 10:34 |
| PaulePanter | cjwatson: No idea if something changed since December. But to my knowledge there was only a restart. | 10:37 |
| cjwatson | PaulePanter: I'm building a test fix in a PPA for you. | 10:41 |
| cjwatson | The diff is http://paste.ubuntu.com/7736119/ | 10:41 |
| cjwatson | It'll be built in https://launchpad.net/~cjwatson/+archive/grub/+packages later today. I'll let you know | 10:44 |
| PaulePanter | cjwatson: Thanks a lot! | 10:46 |
| cjwatson | PaulePanter: That's built there now. Please test. | 12:45 |
| zartoosh | Hi I am preseeding installation of ubuntu 14.04 , using expert_recipe I create 4 partitions. One partition I do not want to have mountpoint. But I always get asked for "No mount point assigned ..." for that partition. How could I by pass this? thx | 13:35 |
| PaulePanter | cjwatson: Thanks. There is no crash anymore. | 13:39 |
| PaulePanter | http://paste.ubuntu.com/7736818/ | 13:39 |
| PaulePanter | … but still the scary warning. But I think I can ignore that. | 13:39 |
| cjwatson | PaulePanter: No worse than before, I expect. | 13:41 |
| cjwatson | PaulePanter: Thanks. Let me know when you've filed the bug, and I can then upload the fix. | 13:42 |
| zartoosh | this is part of my expert_recipe: http://paste.ubuntu.com/7736832/ | 13:42 |
| zartoosh | Need help please. | 13:43 |
| cjwatson | zartoosh: You can either mount it somewhere for the sake of the installer's sanity checking, and remove it from /target/etc/fstab in a preseed/late_command script; or you can preseed "d-i partman-basicfilesystems/no_mount_point boolean false" to suppress the warning, if you don't mind losing the check altogether. | 13:46 |
| zartoosh | cjwatson, thx, | 13:48 |
| mikem_p250 | when installing trusty is it possible for the kernel to be updated during the install | 16:13 |
| mikem_p250 | ? | 16:13 |
| mikem_p250 | I should say updated automatically w/o the user's knowledge | 16:14 |
| PaulePanter | cjwatson: Clicking *Report a bug* on https://bugs.launchpad.net/ubuntu/+bugs?field.searchtext=grub&search=Search+Bug+Reports&field.scope=project&field.scope.target=ubuntu | 20:18 |
| PaulePanter | forwards me to https://help.ubuntu.com/community/ReportingBugs . | 20:18 |
| PaulePanter | So I just run `ubuntu-bug /var/crash/_usr…` which did not require any credentials. | 20:19 |
| PaulePanter | Hopefully that works for you too. | 20:19 |
| PaulePanter | Looks like I would have to do that from <https://bugs.launchpad.net/ubuntu/+source/grub2/+filebug>. | 20:21 |
| cjwatson | PaulePanter: I don't see it. Please use https://bugs.launchpad.net/ubuntu/+source/grub2/+filebug?no-redirect | 20:44 |
| PaulePanter | cjwatson: Ok. | 20:54 |
| PaulePanter | cjwatson: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1336946 | 21:08 |
| cjwatson | thanks | 21:09 |
| PaulePanter | cjwatson: Thank you for your great support. I am leaving this channel again. You’ll find me in #grub if there is anything else. | 21:20 |
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