Public bug reported:
Binary package hint: linux-source-2.6.22
I cannot get apport to work on 2.6.22-6.13. There is no data passed, the
core dumps are 0 empty by default, and CORE_REAL_RLIM is always -1.
Let's create a crash hook and enable it:
$ echo -e '#!/bin/sh\nenv >/tmp/env\ncat >/tmp/crash' > /tmp/hook
$ chmod 755 /tmp/hook
$ echo '|/tmp/hook' | sudo tee /proc/sys/kernel/core_pattern
For the default ulimit 0:
$ ulimit -c
0
$ bash -c 'kill -SEGV $$'
Segmentation fault (core dumped)
$ ls -l /tmp/env /tmp/crash
-rw-r--r-- 1 root root 0 2007-06-08 08:25 /tmp/crash
-rw-r--r-- 1 root root 145 2007-06-08 08:25 /tmp/env
$ grep RLIM /tmp/env
CORE_REAL_RLIM=-1
In this case, CORE_REAL_RLIM should be 0 (since -1 means 'unlimited')
and /tmp/crash should have the entire core dump (but is empty).
For unlimited it works fine:
$ ulimit -S -c unlimited
$ bash -c 'kill -SEGV $$'
Segmentation fault (core dumped)
$ ls -l /tmp/env /tmp/crash
-rw-r--r-- 1 root root 905216 2007-06-08 08:28 /tmp/crash
-rw-r--r-- 1 root root 145 2007-06-08 08:28 /tmp/env
$ grep RLIM /tmp/env
CORE_REAL_RLIM=-1
For a large limit, the core dump works, but CORE_REAL_RLIM is not
correctly set:
$ ulimit -S -c 5000
$ bash -c 'kill -SEGV $$'
Segmentation fault (core dumped)
$ ls -l /tmp/env /tmp/crash
-rw-r--r-- 1 root root 909312 2007-06-08 08:30 /tmp/crash
-rw-r--r-- 1 root root 145 2007-06-08 08:30 /tmp/env
$ grep RLIM /tmp/env
CORE_REAL_RLIM=-1
For a small ulimit, the core dump s correctly capped, but CORE_REAL_RLIM
is still -1:
$ ulimit -S -c 50
$ bash -c 'kill -SEGV $$'
Segmentation fault (core dumped)
$ ls -l /tmp/env /tmp/crash
-rw-r--r-- 1 root root 53248 2007-06-08 08:31 /tmp/crash
-rw-r--r-- 1 root root 145 2007-06-08 08:31 /tmp/env
$ grep RLIM /tmp/env
CORE_REAL_RLIM=-1
The empty core dump with 0 ulimit breaks apport in the default case, and
the wrongly set CORE_REAL_RLIM breaks correct writing of core files by
apport.
Thanks in advance!
** Affects: linux-source-2.6.22 (Ubuntu)
Importance: Undecided
Status: Unconfirmed
--
apport patches for CORE_REAL_RLIM and limit overriding do not work any more
https://bugs.launchpad.net/bugs/119267
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