A Dimecres, 4 de juliol de 2012 18:08:30, Michael Tokarev va escriure: > tags 679377 + moreinfo > thanks > > On 28.06.2012 13:14, Jordi Pujol wrote: > > Package: busybox > > Version: 1:1.20.0-4 > > Severity: important > > > > the patch "shell-ash-export-HOME.patch" causes a segmentation fault when > > initramfs boots, > > I believe that this fault occurs the first time that initramfs looks for > > some executable in the initramfs filesystem, > > Does whole thing actually work? Why do you think it is this patch > which causes the SIGSEGV? The change in this patch is quite, well, > innocent, it does not look like it can be a cause for any such issues. > This works now, using the modified version, There are a few weeks, after the upgrade of Busybox, the system not booted; automatically it entered in the Busybox shell, and we see "Segmentation fault..." in the file /run/initramfs/initramfs.debug Trying the new version 1.20.1 from upstream, with their stable patches, allways boots. Adding the old patches to that, this little patch makes the boot fail,
I believe that some built-in Busybox commands access to internal memory tables that are not initialized yet, These tables may be initialized with some commands that manage paths or directories. (It's supposed, from experiences). > Can you describe your initramfs/environment a bit? Maybe give me > access to your initramfs for testing? my initramfs is based in Debian Live initramfs, in their mailing-list they have been talking about that and it's solved with a workaround. This workaround re-creates a directory (mkdir -p) that already exists. http://lists.debian.org/CAFp4thR1VTaWJxjO1G0A-- N3ww8Mnrf3E=pe0wtye_ztexc...@mail.gmail.com > > > Also, the latest release of busybox, 1.20.1 is a bit different of that, > > and > > Different of what, exactly? The version of busybox you're > filing bugreport against is actually 1.20.1, so there are > two questions actually: what is different, and different > between what and what? -- since you're comparing the same > thing with itself. Sorry, a detailed look shows that I was magnifying the things, there is only one diff, diff -Naurp ../busybox-1.20.0/shell/ash.c ../busybox-1.20.1-lnet1/shell/ash.c --- ../busybox-1.20.0/shell/ash.c 2012-07-05 12:11:06.000000000 +0200 +++ ../busybox-1.20.1-lnet1/shell/ash.c 2012-04-22 03:45:24.000000000 +0200 @@ -6846,7 +6846,8 @@ evalvar(char *p, int flags, struct strli patloc = expdest - (char *)stackblock(); if (NULL == subevalvar(p, /* varname: */ NULL, patloc, subtype, startloc, varflags, - /* quotes: */ flags & (EXP_FULL | EXP_CASE | EXP_REDIR), +//TODO: | EXP_REDIR too? All other such places do it too + /* quotes: */ flags & (EXP_FULL | EXP_CASE), var_str_list) ) { int amount = expdest - ( > So, I really want to know more about your environment and > the segfault. I don't see any segfaults here. This Segmentation fault is really difficult to debug, it's supposed that occurs depending on the instruccions contained in every script, Here is a saved log of an execution, using a modified Debian Live initramfs that traps all errors, ... + maybe_break mount + [ = mount ] + log_begin_msg Mounting root file system + _log_msg Begin: Mounting root file system ... + [ n = y ] + printf Begin: Mounting root file system ... Begin: Mounting root file system ... + . /scripts/lnet + export LANG=C + LNET_LIVEPOINT=/lnet + mountpoint=/lnet/image + LNET_MEDIA_PATH=LneT + LNET_LIVEVARS=/etc/lnet.vars + LNET_USERNAME=livenet + LNET_USERFULLNAME=Live never ending Tale user + LNET_HOSTNAME=Live-neT + [ -z -qb ] + LNET_MODPROBE_OPTIONS=-qb + . /scripts/functions + set -e + trap set +e ; trap - 0 ; panic "Error in ${0}" 0 + touch /etc/mtab + mkdir -p /lnet + awk /MemTotal:/{print $2} /proc/meminfo Segmentation fault... (next the panic routine is executed...) All the commands are built-in Busybox commands, It has been not possible to save a log in Debian Live; in this environment after the error the shell was locked or unresponsible, it seems that everyone has solved this, in a form or other, change the severity to normal, if you want. Thanks, Jordi Pujol Live never ending Tale GNU/Linux Live forever! http://livenet.selfip.com -- To UNSUBSCRIBE, email to debian-boot-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/201207051312.42206.jordipuj...@gmail.com
