Hi Elias,
It is probably a bug but I could not reproduce it. Note that commit 30cca512c
(build: remove valgrind leftovers, 2019-11-25) is present in stable/2001 so
probably not the culprit...
Can you share how you built VPP and your complete startup.conf? You seems to be
running those commands from startup.conf directly.
Best
ben
> -----Original Message-----
> From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of Elias Rudberg
> Sent: mercredi 3 juin 2020 15:48
> To: vpp-dev@lists.fd.io
> Subject: [vpp-dev] Assertion failure triggered by "ip mroute add" command
> (master branch)
>
> Hello VPP experts,
>
> There seems to be a problem with "ip mroute add" causing assertion
> failure. This happens for the current master branch and the stable/2005
> branch, but not for stable/1908 and stable/2001.
>
> Doing the following is enough to see the problem:
>
> create int rdma host-if enp101s0f1 name Interface101
> set int ip address Interface101 10.0.0.1/24
> ip mroute add 224.0.0.1 via Interface101 Accept
>
> The "ip mroute add" command there then causes an assertion failure.
> Backtrace:
>
> Thread 1 "vpp_main" received signal SIGABRT, Aborted.
> __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
> 51 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
> (gdb) bt
> #0 __GI_raise (sig=sig@entry=6) at
> ../sysdeps/unix/sysv/linux/raise.c:51
> #1 0x00007ffff4629801 in __GI_abort () at abort.c:79
> #2 0x00000000004071a3 in os_panic () at vpp/src/vpp/vnet/main.c:371
> #3 0x00007ffff55085b9 in debugger () at vpp/src/vppinfra/error.c:84
> #4 0x00007ffff5508337 in _clib_error (how_to_die=2, function_name=0x0,
> line_number=0, fmt=0x7ffff76b04b0 "%s:%d (%s) assertion `%s' fails")
> at vpp/src/vppinfra/error.c:143
> #5 0x00007ffff74d1ed8 in dpo_proto_to_fib (dpo_proto=255) at
> vpp/src/vnet/fib/fib_types.c:353
> #6 0x00007ffff7504111 in fib_path_attached_get_adj
> (path=0x7fffb602cda0, link=255, dpo=0x7fffa6f3c2e8) at
> vpp/src/vnet/fib/fib_path.c:721
> #7 0x00007ffff75038fa in fib_path_resolve (path_index=15) at
> vpp/src/vnet/fib/fib_path.c:1949
> #8 0x00007ffff74f6a18 in fib_path_list_paths_add (path_list_index=13,
> rpaths=0x7fffb6523b40) at vpp/src/vnet/fib/fib_path_list.c:902
> #9 0x00007ffff75c795a in mfib_entry_src_paths_add
> (msrc=0x7fffb6527c10, rpaths=0x7fffb6523b40) at
> vpp/src/vnet/mfib/mfib_entry.c:754
> #10 0x00007ffff75c764e in mfib_entry_path_update (mfib_entry_index=1,
> source=MFIB_SOURCE_CLI, rpaths=0x7fffb6523b40) at
> vpp/src/vnet/mfib/mfib_entry.c:1009
> #11 0x00007ffff75ce98a in mfib_table_entry_paths_update_i (fib_index=0,
> prefix=0x7fffa6f3c720, source=MFIB_SOURCE_CLI, rpaths=0x7fffb6523b40)
> at vpp/src/vnet/mfib/mfib_table.c:318
> #12 0x00007ffff75ce643 in mfib_table_entry_path_update (fib_index=0,
> prefix=0x7fffa6f3c720, source=MFIB_SOURCE_CLI, rpath=0x7fffb5ffa330)
> at vpp/src/vnet/mfib/mfib_table.c:335
> #13 0x00007ffff6f18ce2 in vnet_ip_mroute_cmd (vm=0x7ffff63969c0
> <vlib_global_main>, main_input=0x7fffa6f3cf18, cmd=0x7fffb5efced0) at
> vpp/src/vnet/ip/lookup.c:819
> #14 0x00007ffff6093139 in vlib_cli_dispatch_sub_commands
> (vm=0x7ffff63969c0 <vlib_global_main>, cm=0x7ffff6396bf0
> <vlib_global_main+560>, input=0x7fffa6f3cf18, parent_command_index=463)
> at vpp/src/vlib/cli.c:568
> #15 0x00007ffff6092fdd in vlib_cli_dispatch_sub_commands
> (vm=0x7ffff63969c0 <vlib_global_main>, cm=0x7ffff6396bf0
> <vlib_global_main+560>, input=0x7fffa6f3cf18, parent_command_index=0)
> at vpp/src/vlib/cli.c:528
> #16 0x00007ffff609218f in vlib_cli_input (vm=0x7ffff63969c0
> <vlib_global_main>, input=0x7fffa6f3cf18, function=0x0, function_arg=0)
> at vpp/src/vlib/cli.c:667
> #17 0x00007ffff616180b in startup_config_process (vm=0x7ffff63969c0
> <vlib_global_main>, rt=0x7fffb4a9c480, f=0x0) at
> vpp/src/vlib/unix/main.c:366
> #18 0x00007ffff60dd704 in vlib_process_bootstrap (_a=140736226945080)
> at vpp/src/vlib/main.c:1502
> #19 0x00007ffff552c744 in clib_calljmp () at
> vpp/src/vppinfra/longjmp.S:123
> #20 0x00007fffb4d06830 in ?? ()
> #21 0x00007ffff60dd2a2 in vlib_process_startup (vm=0x28800000000,
> p=0xcd5b1d5112dc20, f=0xb4d069a0) at vpp/src/vlib/main.c:1524
> #22 0x00000030b6523520 in ?? ()
> #23 0x000000000000002f in ?? ()
> #24 0x00000035b4d429c0 in ?? ()
> #25 0x0000000000000034 in ?? ()
> #26 0x00007ffff7b775b4 in vlibapi_get_main () at
> vpp/src/vlibapi/api_common.h:385
> Backtrace stopped: previous frame inner to this frame (corrupt stack?)
> (gdb)
>
> The code at the assertion at fib_types.c:353 looks like this:
>
> fib_protocol_t
> dpo_proto_to_fib (dpo_proto_t dpo_proto)
> {
> switch (dpo_proto)
> {
> case DPO_PROTO_IP6:
> return (FIB_PROTOCOL_IP6);
> case DPO_PROTO_IP4:
> return (FIB_PROTOCOL_IP4);
> case DPO_PROTO_MPLS:
> return (FIB_PROTOCOL_MPLS);
> default:
> break;
> }
> ASSERT(0); <--- this assertion is triggered
> return (0);
> }
>
> so apparently dpo_proto does not have any of the allowed values.
>
> Testing earlier commits in the git history pointed to the following
> seemingly unrelated and harmless refactoring commit as the point when
> this problem started:
> 30cca512c (build: remove valgrind leftovers, 2019-11-25)
>
> What we are trying to do, which has worked for VPP 19.08, is to enable
> receiving of multicast packets on a given interface using two commands
> like this:
>
> ip mroute add 224.0.0.1 via Interface101 Accept
> ip mroute add 224.0.0.1 via local Forward
>
> but now for the master branch the first of those "ip mroute add" lines
> gives the assertion failure.
>
> Has something changed regarding how the "ip mroute add" command is to
> be used?
> If not, could the assertion failure indicate a bug somewhere?
>
> The problem seems easy to reproduce, at least for me the assertion
> happens in the same way every time.
>
> Best regards,
> Elias
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