[OE-core] glibc detected *** groupadd: malloc(): memory corruption

[Robert Yang]

Hi Experts:

I've met a strange issue, when set the length of builddir to
266 (Why I did this is that I need to know how long the tmpdir
that oe-core can support):

NOTE: package dbus-1.4.20-r3.0: task do_install: Started
*** glibc detected *** groupadd: malloc(): memory corruption: 0x000000000101da70 ***
*** glibc detected *** groupadd: malloc(): memory corruption: 0x000000000101da70 ***

Then the build would hang, this is caused by the command:

PSEUDO_PREFIX=/too/long/path/tmp/sysroots/x86_64-linux/usr
PSEUDO_LOCALSTATEDIR=... PSEUDO_PASSWD=...
PSEUDO_NOSYMLINKEXP=1 PSEUDO_DISABLED=0 PSEUDO_LOCALSTATEDIR
... /too/long/path/to/tmp/sysroots/x86_64-linux/usr/bin/pseudo
groupadd --root /too/long/path/to/tmp/sysroots/qemux86 -r netdev -f

1) I had looked into the code of groupadd, and found that this would
happen when it used the glibc function which needs malloc(for example,
the access()), so it seemed this was caused by the glibc or pseudo,
but I didn't know why it only happened to groupadd/useradd.

2) I had tried not to use pseudo, it worked well:

sudo groupadd --root /too/long/path/to/tmp/sysroots/qemux86 -r netdev -f

 From this, it seemed that the glibc was ok

3) I had tried to write a small piece of code which used the access(), and
used pseudo to run it, it worked well:

/too/long/path/for/pseudo/settings/and/then/run/pseudo my_app

 From this, it seemed that both pseudo and glibc were OK.

These 3 steps make me puzzle, maybe we can think that the tmpdir can not
be too long, and limit it to a proper length, please see this:

http://lists.linuxtogo.org/pipermail/openembedded-core/2012-May/022112.html

BTW. the "argument list too long" error has been fixed.

Any suggestion is appreciated.

-- 
Thanks

Robert