The kernel msg is just a sign of the program hitting an error
Doing
$ ./mock-sshd --user=bug --port 1234 -v
attaching gdb
and then issuing the client cmd
$ ssh -i test_rsa -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no
-p 1234 bug@localhost cat /etc/os-release
leads to this server segfault
Program received signal SIGSEGV, Segmentation fault.
0x000002aa02e02e84 in fd_data (fd=<error reading variable: Cannot access memory
at address 0x3ffce57fe94>,
revents=<error reading variable: Cannot access memory at address
0x3ffce57fe90>,
user_data=<error reading variable: Cannot access memory at address
0x3ffce57fe88>) at mock-sshd.c:164
164 {
(gdb) bt
#0 0x000002aa02e02e84 in fd_data (fd=<error reading variable: Cannot access
memory at address 0x3ffce57fe94>,
revents=<error reading variable: Cannot access memory at address
0x3ffce57fe90>,
user_data=<error reading variable: Cannot access memory at address
0x3ffce57fe88>) at mock-sshd.c:164
#1 0x000003ffa9b32128 in ssh_poll_ctx_dopoll (ctx=ctx@entry=0x2aa04d545a0,
timeout=timeout@entry=-1)
at /usr/src/libssh-0.10.5-2/src/poll.c:736
#2 0x000003ffa9b33732 in ssh_handle_packets
(session=session@entry=0x2aa04d54ae0, timeout=timeout@entry=-1)
at /usr/src/libssh-0.10.5-2/src/session.c:682
#3 0x000003ffa9b338e4 in ssh_handle_packets_termination
(session=session@entry=0x2aa04d54ae0, timeout=<optimized out>,
fct=fct@entry=0x3ffa9b33d30 <ssh_flush_termination>,
user=user@entry=0x2aa04d54ae0)
at /usr/src/libssh-0.10.5-2/src/session.c:751
#4 0x000003ffa9b33dc6 in ssh_blocking_flush (session=0x2aa04d54ae0,
timeout=<optimized out>)
at /usr/src/libssh-0.10.5-2/src/session.c:550
#5 0x000003ffa9b1a0dc in ssh_channel_flush (channel=0x2aa04db9bd0) at
/usr/src/libssh-0.10.5-2/src/channels.c:1433
#6 ssh_channel_send_eof (channel=0x2aa04db9bd0) at
/usr/src/libssh-0.10.5-2/src/channels.c:1316
...
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Packages, which is subscribed to libssh in Ubuntu.
https://bugs.launchpad.net/bugs/2024064
Title:
libssh dep8 fails on ppc64el/s390x
Status in libssh package in Ubuntu:
New
Bug description:
Reporting this bug for documentation purposes. libssh's dep8 test is
failing on ppc64el/s390x.
I tried reproducing it in a ppc64el canonistack box, but the test
always passes there. migration-reference/0 didn't help.
It's interesting to notice that the test succeeds on debci, which
leads me to believe that this is something really particular to our
autopkgtest infra.
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https://bugs.launchpad.net/ubuntu/+source/libssh/+bug/2024064/+subscriptions
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