[dpdk-dev] [PATCH] net/bonding: fix add bonded device itself as its slave

[Ferruh Yigit]

On 4/15/2021 8:09 AM, Min Hu (Connor) wrote:
> From: Chengchang Tang <tangchengchang at huawei.com>
> 
> Adding the bond device as its own slave should be forbidden. This
> will cause a recursive endless loop in many subsequent operations,
> and eventually lead to coredump.
> 
> This problem was found in testpmd, the related logs are as follows:
> testpmd> create bonded device 1 0
> Created new bonded device net_bonding_testpmd_0 on (port 4).
> testpmd> add bonding slave 4 4
> Segmentation fault (core dumped)
> 
> The call stack is as follows:
> 0x000000000064eb90 in rte_eth_dev_info_get ()
> 0x00000000006df4b4 in bond_ethdev_info ()
> 0x000000000064eb90 in rte_eth_dev_info_get ()
> 0x00000000006df4b4 in bond_ethdev_info ()
> 0x000000000064eb90 in rte_eth_dev_info_get ()
> 0x0000000000564e58 in eth_dev_info_get_print_err ()
> 0x000000000055e8a4 in init_port_config ()
> 0x000000000052730c in cmd_add_bonding_slave_parsed ()
> 0x0000000000646f60 in cmdline_parse ()
> 0x0000000000645e08 in cmdline_valid_buffer ()
> 0x000000000064956c in rdline_char_in ()
> 0x0000000000645ee0 in cmdline_in ()
> 0x00000000006460a4 in cmdline_interact ()
> 0x0000000000531904 in prompt ()
> 0x000000000051cca8 in main ()
> 
> Fixes: 2efb58cbab6e ("bond: new link bonding library")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Chengchang Tang <tangchengchang at huawei.com>
> Signed-off-by: Min Hu (Connor) <humin29 at huawei.com>

Applied to dpdk-next-net/main, thanks.