(gdb) where
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb7c5c5fb in poll () from /lib/i686/cmov/libc.so.6
#2  0xb7d4f4a4 in apr_wait_for_io_or_timeout () from /usr/lib/libapr-1.so.0
#3  0xb7d4a8e0 in apr_socket_recv () from /usr/lib/libapr-1.so.0
#4  0x08080420 in ap_lingering_close ()
#5  0x0808d4e2 in ?? ()
#6  0x0a47d5f8 in ?? ()
#7  0x0a47d460 in ?? ()
#8  0x0a47d460 in ?? ()
#9  0x00000003 in ?? ()
#10 0x0a47b4b8 in ?? ()
#11 0x0a481630 in ?? ()
#12 0x00000000 in ?? ()