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X-TM-AS-Result: No-8.407400-8.000000-10 X-TMASE-MatchedRID: u7Yf2n7Ca/2oGXjkaQmeH/ZvT2zYoYOwC/ExpXrHizxpsnGGIgWMmX/I rjUC0kRwBrJ70s3L62TX0oCqPlCv1s4WlbIOZPcwfid4LSHtIAOFThMCX7VKl7CD8SH1jO+0gsI JV9NWYtZdNVjTn8oqRW3CjKCtFVXAzECLGgnCzVgD2WXLXdz+AX/0yDqj7AyLdBaEtWosUzUVLG IPVP4OQU8lW8tNo86TXO/yVP5Gyz6hv2jvaZiFXRlJRfzNw8afMVx/3ZYby7+HJEE1tj+Y9ImbJ YGMyzGQ5HzvdTqjiYtILFvRdPyc65H0YXYnbGozOX/V8P8ail2cIZLVZAQa0I7xHquoAJGGq7rF UcuGp/EnRE+fI6etkiyTdSgldOVT0QGIQfZyYtp1yGFlDzHBs+Z99Gpqbj8m6i0n6ir7Kg86iHz wFLagi8m4oiZdnS3droydqdyDgcZfXBRCC+VhwPAdfn5DyOPDXC6uJnc/p0SsglkltB8xdGpozk ualSTDOvxFSbveVNw= X-TM-AS-User-Approved-Sender: Yes X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--8.407400-8.000000 X-TMASE-Version: SMEX-12.5.0.1300-8.5.1020-25426.003 X-MDID: 1589808785-VW01-HG4OHFY Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH v5] ethdev: fix DCB set failure X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org Sender: "stable" CC net/nfp maintainer On 5/13/20 8:16 PM, Ting Xu wrote: > When rte_eth_dev_rss_hash_conf_get() is called, if the variable > rss_conf is not initialized, the pointer member variable rss_key > may have a random address, which leads to an error in the following > processing. This patch initialized the variable rss_conf to avoid > this situation. > > Fixes: 16321de09396 ("ethdev: allow to get RSS hash functions and key") > Cc: stable@dpdk.org > > Signed-off-by: Ting Xu > > --- > v4->v5: modify commit log > V3->v4: fix build failure > v2->v3: move memset to rte_eth_dev_rss_hash_conf_get from testpmd > v1->v2: modify commit log, move memset to else leg > --- > lib/librte_ethdev/rte_ethdev.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c > index 8e10a6fc3..b20c6bb2d 100644 > --- a/lib/librte_ethdev/rte_ethdev.c > +++ b/lib/librte_ethdev/rte_ethdev.c > @@ -3552,6 +3552,7 @@ rte_eth_dev_rss_hash_conf_get(uint16_t port_id, > RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV); > dev = &rte_eth_devices[port_id]; > RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->rss_hash_conf_get, -ENOTSUP); > + memset(rss_conf, 0, sizeof(*rss_conf)); > return eth_err(port_id, (*dev->dev_ops->rss_hash_conf_get)(dev, > rss_conf)); > } > The patch breaks getting of RSS key since it resets rss_conf->rss_key to NULL, but all drivers treat it as a pointer to buffer to copy RSS key to. Almost all driver just skip RSS key copy if the pointer is NULL. I think it should be removed from next-net or improved to reset rss_hf only since rss_key_len may be treated as a size of rss_key buffer. The API is not clear at the place. It looks like net/nfp is the only driver which does not check that that pointer is not NULL before coping key to it.