Hello Frank,
scratch my last e-mail, it was premature. I found out, that errors
from programms started via menus are printend on stdout/stderr (which
I did not see previously, as X has become very chatty since X.org 7).
So my results are (2.6.10 without, 2.6.14 with grsec):
Kernel Invocation Observation
2.6.10 in xterm does not seem to crash
2.6.10 from menu Always crashes, always same glibc-address
(even after X shutdown and new start)
0x0000000000ef39a0
2.6.14 in xterm Crashes roughly 50% of the time, always
different address, crash less likly if started
succesfully already (i.e. in a row, once an
instance actually started)
2.6.14 from menu Except one attempt always crashes but
different glibc-adress each time:
0x0000000000eff0d0
0x0000000000ef7bf0
0x0000000000ef6bf0
0x0000000000efdf40
0x0000000000efe6e0
0x0000000000efcad0
0x0000000000efc2a0
0x0000000000efa5f0
Of course, I did not run any statistics, so the numbers are not
accurate, i.e. the succesfull launch from the menu just happend during
the last test (I tried this yesterday quite a few times already,
always without success).
The reason the addresses are different in 2.6.14 probably *is* grsec
specific (due to memory randomization). So looking at the above data
from 2.6.10, there is a bug in texshow, just that grsec sometimes
(seldom) hides it, approx. 50% of the time hits it (where command line
execution is involved).
Can you launch texshow reliably from the menu entry? (If you are not
on an 64bit machine, or more precisely a amd64, maybe we can ask on
the amd64 list for other oppinions).
If you think 2.6.14 could be an additional cause, I could run a few
tests with 2.6.11 (also with grsec).
No, I cannot test a stock Debian kernel, because it depends on udev
which I do not want at this time (due to the strong interlink with the
kernel version).
Greetings
Helge
--
Dr. Helge Kreutzmann debian@helgefjell.de
Dipl.-Phys. http://www.helgefjell.de/debian.php
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