On Thu, Apr 14, 2022 at 09:09:53AM +0200, Sascha Steinbiss wrote: > Many thanks for reproducing this and for offering a the detailed > explanation. I would be happy to forward your findings to upstream (however, > my previous issues/PRs on upstream's GitHub have gone unanswered). For the > time being, I must admit I unfortunately do not have the time to fix it via > a patch.
> Do you think we should wait for this to be fixed? As I said before I (just > from my practical point of view) would be in favor of just removing the > problematic architectures. I have no opinion on this. But if you want the package to be releasable, you will need to change it so that it is not building a (completely broken and useless) package on armhf, then get agreement with the ftp team to remove the existing armhf binaries. > On 13.04.22 22:39, Steve Langasek wrote: > > Note that this will consistently fail alignment checks on architectures > > which require alignment, because the initial buffer is allocated with > > reasonable alignment (32bit) but the ethernet header is 14 bytes long, so > > the TCP header fields will always be unaligned within the buffer. > > > > On Wed, Apr 13, 2022 at 01:20:49PM -0700, Steve Langasek wrote: > > > Here is a backtrace of the armhf SIGBUS. > > > > > > Note that not all ARM implementations return SIGBUS which is probably why > > > this was not reproducible on the porter machine. > > > > > > # gdb --args pktanon -c > > > /usr/share/doc/pktanon/examples/profiles/profile.xml > > > ./profiles/sample.pcap ./out.pcap > > > [...] > > > Reading symbols from pktanon... > > > Reading symbols from > > > /usr/lib/debug/.build-id/af/1ac53f46ae133c8898358966960cba95ac7a70.debug... > > > (gdb) run > > > Starting program: /usr/bin/pktanon -c > > > /usr/share/doc/pktanon/examples/profiles/profile.xml > > > ./profiles/sample.pcap ./out.pcap > > > [Thread debugging using libthread_db enabled] > > > Using host libthread_db library > > > "/lib/arm-linux-gnueabihf/libthread_db.so.1". > > > ----------------------------------------------- > > > pktanon --- profile-based traffic anonymization > > > ----------------------------------------------- > > > initializing PktAnon, configuration = > > > /usr/share/doc/pktanon/examples/profiles/profile.xml > > > unknown element: pktanon-config: 37 > > > unknown element: anonymizations: 102 > > > istream: opened file ./profiles/sample.pcap > > > ostream: opened output file ./out.pcap > > > initialized > > > > > > Program received signal SIGBUS, Bus error. > > > pktanon::TcpPacketTransformation::transform (this=<optimized out>, > > > source_buffer=<optimized out>, destination_buffer=0xfffef35a > > > "\212y\262X\335\300l\221", max_packet_length=40) at > > > transformations/TcpPacketTransformation.cpp:88 > > > 88 hton32 (output_header->ack_num); > > > (gdb) bt > > > #0 pktanon::TcpPacketTransformation::transform (this=<optimized out>, > > > source_buffer=<optimized out>, > > > destination_buffer=0xfffef35a "\212y\262X\335\300l\221", > > > max_packet_length=40) at > > > transformations/TcpPacketTransformation.cpp:88 > > > #1 0x0040b77c in pktanon::IPv4PacketTransformation::transform > > > (this=0x4b4eb0, > > > source_buffer=<optimized out>, destination_buffer=0xfffef346 "E", > > > max_packet_length=<optimized out>) > > > at transformations/IPv4PacketTransformation.cpp:153 > > > #2 0x0040af64 in pktanon::EthernetPacketTransformation::transform ( > > > this=0x4ad780, source_buffer=<optimized out>, > > > destination_buffer=0xfffef338 > > > "\376\212\a\213\001\254\303\341\372DI\355\b", max_packet_length=74) at > > > transformations/EthernetPacketTransformation.cpp:53 > > > #3 0x00416862 in pktanon::transform_packet (stats=..., > > > packet_len=<optimized out>, > > > transformed_packet=0xfffef338 > > > "\376\212\a\213\001\254\303\341\372DI\355\b", original_packet=0xfffef438 > > > "", record_header=...) at Utils.h:26 > > > #4 pktanon::IstreamInput::read_packets (this=0x4b3ce0) > > > at IstreamRecordsHandler.cpp:121 > > > #5 0x00415130 in pktanon::PktAnonRuntime::run () at PktAnonRuntime.cpp:37 > > > #6 0x00405bfa in main (argc=<optimized out>, argv=<optimized out>) > > > at src/Main.cpp:73 > > > (gdb) > > > > > > So, this is trying to do an hton32() operation on a field that is not > > > 4-byte > > > aligned. > > > > > > -- > > > Steve Langasek Give me a lever long enough and a Free OS > > > Debian Developer to set it on, and I can move the world. > > > Ubuntu Developer https://www.debian.org/ > > > slanga...@ubuntu.com vor...@debian.org > > -- Steve Langasek Give me a lever long enough and a Free OS Debian Developer to set it on, and I can move the world. Ubuntu Developer https://www.debian.org/ slanga...@ubuntu.com vor...@debian.org
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