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Package: openssh-server Version: 8.8p1 The child process handling a customer login to an embedded system crashed on a fatal assert. The following backtrace was recovered from logs: #0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50 #1 0x00007fe72da6a535 in __GI_abort () at abort.c:79 #2 0x00007fe72dac1648 in __libc_message (action="" | do_backtrace), fmt=fmt@entry=0x7fe72dbcae9c "%s") at ../sysdeps/posix/libc_fatal.c:181 #3 0x00007fe72dac1672 in __GI___libc_fatal (message=0x7fffbe8f3f70 "Unexpected error 9 on netlink descriptor 3.\n") at ../sysdeps/posix/libc_fatal.c:191 #4 0x00007fe72db5f264 in __GI___netlink_assert_response (fd=fd@entry=3, result=<optimized out>) at ../sysdeps/unix/sysv/linux/netlink_assert_response.c:102 #5 0x00007fe72db5ea63 in make_request (pid=22108, fd=3) at ../sysdeps/unix/sysv/linux/check_pf.c:171 #6 __check_pf (seen_ipv4=seen_ipv4@entry=0x7fffbe8f5232, seen_ipv6=seen_ipv6@entry=0x7fffbe8f5233, in6ai=in6ai@entry=0x7fffbe8f5240, in6ailen=in6ailen@entry=0x7fffbe8f5248) at ../sysdeps/unix/sysv/linux/check_pf.c:329 #7 0x00007fe72db2c5a7 in __GI_getaddrinfo (name=<optimized out>, service=0x0, hints=0x7fffbe8f5710, pai=0x7fffbe8f5708) at ../sysdeps/posix/getaddrinfo.c:2212 #8 0x00007fe72da24f53 in ?? () from /lib/x86_64-linux-gnu/libaudit.so.1 #9 0x00007fe72da25a32 in audit_log_acct_message () from /lib/x86_64-linux-gnu/libaudit.so.1 #10 0x00007fe72df8f5d4 in ?? () from /lib/x86_64-linux-gnu/libpam.so.0 #11 0x00007fe72df8f816 in ?? () from /lib/x86_64-linux-gnu/libpam.so.0 #12 0x00007fe72df89b9b in ?? () from /lib/x86_64-linux-gnu/libpam.so.0 #13 0x0000556b3c0bc307 in ?? () #14 0x0000556b3c090cf3 in ?? () #15 0x00007fe72da6c09b in __libc_start_main (main=0x556b3c08d940, argc=4, argv=0x7fffbe8f84f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffbe8f84e8) at ../csu/libc-start.c:308 #16 0x0000556b3c0918ba in ?? () The interesting thing is this has happened twice (perhaps more) and the bad fd was 3 both times. From the source I see that descriptor 3 is reserved for a special purpose: #define REEXEC_DEVCRYPTO_RESERVED_FD (STDERR_FILENO + 1) The following are in use: OpenSSL 1.1.1n, libpam 1.3.1-5, pam_tacplus-1.3.8 Linux 4.19.282 The Debian OS is running on a VM. I could provide server and hypervisor details if needed. |