Nils Breunese <n...@breun.nl> added the comment:

I got this error message in /var/log/messages when trying to start iotop:

----
Apr 13 08:49:37 hostname kernel: grsec: From xxx.xxx.xxx.xxx: denied RWX 
mprotect of /lib64/ld-2.5.so by /usr/bin/iotop[iotop:9836] uid/euid:0/0 
gid/egid:0/0, parent /bin/bash[bash:9351] uid/euid:0/0 gid/egid:0/0
Apr 13 08:49:37 hostname kernel: iotop[9836]: segfault at 6248c405dda0 ip 
00006248c3e489ec sp 00007fffa52e8410 error 7 in ld-2.5.so[6248c3e42000+1c000]
----

/usr/bin/iotop is a Python script and according to that log message grsecurity 
detected a call to mprotect().

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<http://bugs.python.org/issue11912>
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