Crash of the VPP after command upf policy

[dkalashnik]

Plain upf policy command does the vpp crash:

[New LWP 13]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/bin/vpp -c /run/vpp/startup.conf'.
Program terminated with signal SIGABRT, Aborted.
#0  0x00007f936b35118b in raise () from /lib/x86_64-linux-gnu/libc.so.6
#0  0x00007f936b35118b in raise () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f936b330859 in abort () from /lib/x86_64-linux-gnu/libc.so.6
#2  0x00005585ed27c905 in os_exit (code=<optimized out>) at /vpp-src/src/vpp/vnet/main.c:433
#3  0x00007f936bc15d18 in unix_signal_handler (signum=<optimized out>, si=<optimized out>, uc=<optimized out>) at /vpp-src/src/vlib/unix/main.c:184
#4  <signal handler called>
#5  mspace_put (msp=0x7f926b208040, p_arg=p_arg@entry=0xfffffffffffffffe) at /vpp-src/src/vppinfra/dlmalloc.c:4281
#6  0x00007f92688b1399 in clib_mem_free (p=0xfffffffffffffffe) at /usr/include/vppinfra/mem.h:321
#7  unformat_free (i=0x7f921c0f0c90) at /usr/include/vppinfra/format.h:164
#8  upf_policy_command_fn (vm=<optimized out>, main_input=<optimized out>, cmd=<optimized out>) at /src/upf/upf_cli.c:1528
#9  0x00007f936bb8874b in vlib_cli_dispatch_sub_commands (vm=<optimized out>, cm=0x7f936bc32a50 <vlib_global_main+592>, input=0x7f921c0f0f50, parent_command_index=<optimized out>) at /vpp-src/src/vlib/cli.c:572
#10 0x00007f936bb88634 in vlib_cli_dispatch_sub_commands (vm=0x7f936bc32800 <vlib_global_main>, cm=0x7f936bc32a50 <vlib_global_main+592>, input=0x7f921c0f0f50, parent_command_index=<optimized out>) at /vpp-src/src/vlib/cli.c:529
#11 0x00007f936bb87d90 in vlib_cli_input (vm=0x7f936bc32800 <vlib_global_main>, input=0x7f921c0f0f50, function=<optimized out>, function_arg=<optimized out>) at /vpp-src/src/vlib/cli.c:674
#12 0x00007f936bc051cb in unix_cli_process_input (cm=<optimized out>, cli_file_index=0) at /vpp-src/src/vlib/unix/cli.c:2613
#13 unix_cli_process (vm=<optimized out>, rt=0x7f926c324c40, f=<optimized out>) at /vpp-src/src/vlib/unix/cli.c:2731
#14 0x00007f936bbb4c37 in vlib_process_bootstrap (_a=<optimized out>) at /vpp-src/src/vlib/main.c:1477
#15 0x00007f936b9e1f6c in clib_calljmp () from /lib/x86_64-linux-gnu/libvppinfra.so.21.01.0
#16 0x00007f9267bd9290 in ?? ()
#17 0x00007f936bbaa462 in vlib_process_startup (vm=0x7f936bc32800 <vlib_global_main>, p=0x7f926c324c40, f=0x0) at /vpp-src/src/vlib/main.c:1502
#18 dispatch_process (vm=0x7f936bc32800 <vlib_global_main>, p=0x7f926c324c40, f=0x0, last_time_stamp=<optimized out>) at /vpp-src/src/vlib/main.c:1558
#19 0x0000000000000000 in ?? ()```