Hi,
Can you try to reproduce the issue in debug mode, or even better in debug mode
with ASan enabled:
https://fd.io/docs/vpp/master/troubleshooting/sanitizer.html#id2 ?
This looks like a memory corruption, but it is hard to tell anything else.
Best
Ben
> -----Original Message-----
> From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of ??
> Sent: samedi 18 septembre 2021 11:08
> To: vpp-dev@lists.fd.io
> Subject: [vpp-dev] vpp crash in vlib_node_sync_stats
>
> Does anyone see this stack before？ I'm using af_xdp to receive packet for
> veth, veth has two queues.
> vpp version: 2106
>
> Thread 1 "vpp_main" received signal SIGSEGV, Segmentation fault.
> vlib_node_sync_stats (vm=vm@entry=0x7fffb5e00680, n=0x7fffb671bc70) at
> /mnt/opensource/vpp/src/vlib/main.c:630
> 630 vlib_node_runtime_sync_stats (vm, rt, 0, 0, 0);
> (gdb) bt
> #0 vlib_node_sync_stats (vm=vm@entry=0x7fffb5e00680, n=0x7fffb671bc70) at
> /mnt/opensource/vpp/src/vlib/main.c:630
> #1 0x00007ffff63ee865 in vlib_node_get_nodes (vm=vm@entry=0x0,
> max_threads=<optimized out>, max_threads@entry=4294967295,
> include_stats=include_stats@entry=1,
> barrier_sync=barrier_sync@entry=0,
> node_dupsp=node_dupsp@entry=0x7fffb0a06f68,
> stat_vmsp=stat_vmsp@entry=0x7fffb0a06f80) at
> /mnt/opensource/vpp/src/vlib/node.c:647
> #2 0x0000555555564d69 in update_node_counters (sm=<optimized out>) at
> /mnt/opensource/vpp/src/vpp/stats/stat_segment.c:621
> #3 do_stat_segment_updates (vm=0x7fffb5e00680, sm=<optimized out>) at
> /mnt/opensource/vpp/src/vpp/stats/stat_segment.c:778
> #4 stat_segment_collector_process (vm=0x7fffb5e00680, rt=<optimized out>,
> f=<optimized out>) at /mnt/opensource/vpp/src/vpp/stats/stat_segment.c:873
> #5 0x00007ffff63e6437 in vlib_process_bootstrap (_a=<optimized out>) at
> /mnt/opensource/vpp/src/vlib/main.c:1284
> #6 0x00007ffff62fcee4 in clib_calljmp () at
> /mnt/opensource/vpp/src/vppinfra/longjmp.S:123
> #7 0x00007fffb2d09d70 in ?? ()
> #8 0x00007ffff63dd1ee in vlib_process_startup (vm=0x7fffb0a08000,
> p=0x20737365636f7270, f=0x0) at /mnt/opensource/vpp/src/vlib/main.c:1309
> #9 dispatch_process (vm=<optimized out>, p=<optimized out>, f=0x0,
> last_time_stamp=<optimized out>) at
> /mnt/opensource/vpp/src/vlib/main.c:1365
> #10 0x0000000000000000 in ?? ()
>
> (gdb) p *n
> $4 = {function = 0x794b9700794154, name = 0x793af800794a00 <error: Cannot
> access memory at address 0x793af800794a00>, name_elog_string = 7918067,
> stats_total = {calls = 34023571285666622,
> vectors = 34023571285666622, clocks = 34135068636670782, suspends =
> 34048202923117826, max_clock = 34035648733712284, max_clock_n =
> 34035648733700162}, stats_last_clear = {
> calls = 34048202923106370, vectors = 33998621820653468, clocks =
> 34039303750868577, suspends = 34025001509779113, max_clock =
> 34023571285685848, max_clock_n = 34142378671018106},
> type = 7952796, index = 7933852, runtime_index = 7924542, runtime_data =
> 0x78eb3e0078f6a9, flags = 57410, state = 120 'x', runtime_data_bytes = 0
> '\000', protocol_hint = 169 '\251',
> n_errors = 120, scalar_size = 60222, vector_size = 120,
> error_heap_handle = 7927465, error_heap_index = 7924542, error_counters =
> 0x78eb3e00793658, next_node_names = 0x78f6a90078e042,
> next_nodes = 0x78c99100790f9c, sibling_of = 0x794d2e00793e26 <error:
> Cannot access memory at address 0x794d2e00793e26>, sibling_bitmap =
> 0x78e0420078eb3e,
> n_vectors_by_next_node = 0x790f9c0078f6a9, next_slot_by_node =
> 0x78f6a90078c991, prev_node_bitmap = 0x78f6a90078eb3e, owner_node_index =
> 7943768, owner_next_index = 7921730,
> format_buffer = 0x78d2870078eb3e, unformat_buffer = 0x78e0420078f6a9,
> format_trace = 0x78eb3e00790f9c, validate_frame = 0x7900000078c991,
> state_string = 0x78cb0300795952 <error: Cannot access memory at address
> 0x78cb0300795952>, node_fn_registrations = 0x78cb4d0078cb28}
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