Hi Team,


A crash is observed on  MLX5 device  while  fetching stats "mlx5_stats_get"
 , looks like *ibv_context*  is getting corrupted  ( ibctx=0x1ede838800001e)



We do access the stats from multiple threads  simultaneously , does this
create any issue ?



Platform details:



Platform      :     VM

Hypervisor    :     Linux KVM

Cloud         :     None

Application   :     64-bit

Datapath      :     DPDK

DPDK : dpdk-22.11.1

Library : libmlx5-rdmav34.so





Program terminated with signal 11, Segmentation fault.

#0  0x00007ffff0114c83 in mlx5_get_dv_ops (ibctx=0x1ede838800001e) at
../providers/mlx5/mlx5.c:2734

2734    ../providers/mlx5/mlx5.c: No such file or directory.

(gdb) bt

#0  0x00007ffff0114c83 in mlx5_get_dv_ops (ibctx=0x1ede838800001e) at
../providers/mlx5/mlx5.c:2734

#1  0x00007ffff012f378 in mlx5dv_devx_obj_query (obj=0x27cabd0
<SipMedia::SipMedia(SipMedia const&)+1120>, in=0x7fffa6badb20, inlen=32,
out=0x7fffa6badb40, outlen=1024)

    at ../providers/mlx5/verbs.c:5808

#2  0x0000000004fc0eeb in mlx5_devx_cmd_queue_counter_query
(dcs=0x31131be2b2c0, clear=clear@entry=0,
out_of_buffers=out_of_buffers@entry=0x7fffa6bae010)

    at ../usbc_gnu_src/drivers/common/mlx5/mlx5_devx_cmds.c:2845

#3  0x00000000052ec96d in mlx5_os_read_dev_stat
(priv=priv@entry=0x31131bf66400,
ctr_name=<optimized out>, ctr_name@entry=0x5b6fcc2 "out_of_buffer",
stat=stat@entry=0x7fffa6bae010)

    at ../usbc_gnu_src/drivers/net/mlx5/linux/mlx5_os.c:2684

#4  0x00000000053719e4 in mlx5_stats_get (dev=<optimized out>,
stats=0x7fffa6bae690) at ../usbc_gnu_src/drivers/net/mlx5/mlx5_stats.c:155

#5  0x0000000005076873 in rte_eth_stats_get () at
../usbc_gnu_src/lib/ethdev/rte_ethdev.c:2733



BR

Narsimha