[Bug 598989] [abrt] crash in perl-Padre-0.50-4.fc13: Process /usr/bin/perl was killed by signal 11 (SIGSEGV)

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https://bugzilla.redhat.com/show_bug.cgi?id=598989

--- Comment #3 from Petr Pisar <ppisar@xxxxxxxxxx> 2010-06-02 17:30:50 EDT ---
It segfaulted here:

0x0000003deb46b954 <+36>: callq  0x3deb41c658 <g_type_check_instance_cast@plt>
=> 0x0000003deb46b959 <+41>: mov    0x440(%rax),%rsi

That means the gtk2 library tried to dereference return code of
g_type_check_instance_cast@plt function at offset 0x440. And because rax was
zero, the effective read address was 0x440. According memory mapping list,
zeroth page was unmapped.

Thus it's simple NULL pointer dereference in libgtk2++. I will check
_gdk_x11_screen_process_owner_change() code in gdkscreen-x11.c later.

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