Date: Wed, 16 May 2001 09:20:35 +0700 From: John Indra <john@office.naver.co.id> To: freebsd-questions@freebsd.org Cc: freebsd-current@freebsd.org Subject: My network is dead because of this program :( Message-ID: <20010516092035.A79109@office.naver.co.id>
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[-- Attachment #1 --] Dear all... First of all, really sorry for cross-posting... I am running a -CURRENT system (Apr 30th 2001). There is a user in my machine running this small program to DoS my xl0 interface. I doubt that this program is specifically designed for xl cards though. Once the program is started, it starts forking childs I assume. Then after sometime, this messages start popping to my screen: xl0: no memory for rx lists -- packet dropped After going to single user mode, cause I can't kill the offending program once it is running in multiuser mode (even kill -9 won't work on my system), then coming back to multiuser mode, I tried to run it and trace what it does with truss. But, truss didn't seem to output anything at all. Then, I saw the program state in top and it said the program is in mbuf state. I have searched all mailing lists archieves in http://www.freebsd.org/search/search.html#mailinglists but wierdly, there are no articles shown when I enter this as a query: "no memory for rx list" Can anyone help me trace what the program does? And how can I prevent the program to DoS my network interface? Even when the program is started by unprivileged user, it works, it DoS my network interface. Is this a bug? I have attached the offending program with this mail. Please don't run it on production system! You have been warned! Thank you very much... /john Live Free OR Die [-- Attachment #2 --] ELF FreeBSD 4 4 ( 4 44 L LLp p /usr/libexec/ld-elf.so.1 FreeBSD 2 , L d & , Ԙ 4 ؘ L W b g m Єn t ؘ d libc.so.5 pause _DYNAMIC sleep _init write environ __deregister_frame_info setsockopt __progname fork _fini atexit socketpair _GLOBAL_OFFSET_TABLE_ exit fcntl __register_frame_info _etext _edata __bss_start _end end ( , 0 4 8 < @ D H N 5 %$ %(h %,h %0h %4h %8h %<h( %@h0 %Dh8 p%Hh@ `U WVSҍu^|=Ԙ~)} t#E8 t8/u H @8 uLt RfhVWVS P]UE]Ív UE]Ív UE]ÐU= u@v @С 8 u t hy ]ÐU]ÉU thhy]Ív U]ÐU E v }~Ct v Ev jv EPj jj)u E jEPh h EP jEPh h EP jEPh h EP jEPh h EPh jjEPjjEPh PEPh PEP1v ÐUS = tv Ѓ;u[]Ív U]Ð L Ƅք d ( @ Ё H [ASM_FILE_END]GCC: (c) 2.95.3 20010315 (release) [ASM_FILE_END]GCC: (c) 2.95.3 20010315 (release) [ASM_FILE_END]GCC: (c) 2.95.3 20010315 (release) [ASM_FILE_END]GCC: (c) 2.95.3 20010315 (release) 01.01 01.01 01.01 01.01 .symtab .strtab .shstrtab .interp .note.ABI-tag .hash .dynsym .dynstr .rel.plt .init .plt .text .fini .rodata .data .eh_frame .ctors .dtors .got .dynamic .bss .comment .note # 1 (( 7 Ё p ? @@ G H P dd V pp [ a g o u 0 LL p P D p / ( Ё @ d p L ȅ - 9 ȅ O b m w ( P \ , L d Ԙ 4 ؘ 8 C N U Z f \^ k q Єn x ؘ d crtstuff.c gcc2_compiled. p.3 __DTOR_LIST__ completed.4 __do_global_dtors_aux __EH_FRAME_BEGIN__ fini_dummy object.11 frame_dummy init_dummy force_to_data __CTOR_LIST__ __do_global_ctors_aux __CTOR_END__ __DTOR_END__ __FRAME_END__ x.c pause _DYNAMIC _etext sleep _init write environ __deregister_frame_info end setsockopt __progname _start fork __bss_start main _fini atexit socketpair _edata _GLOBAL_OFFSET_TABLE_ _end exit fcntl __register_frame_info
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