From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Arcari Subject: Re: [PATCH] aquantia: Fix "ethtool -S" crash when adapter down. Date: Thu, 4 May 2017 16:39:25 -0400 Message-ID: References: <9ea5a2ba21b4f8b22a63acf39135a41e2f1da23c.1493928470.git.pavel.belous@aquantia.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, Lino Sanfilippo , Simon Edelhaus To: Pavel Belous , "David S . Miller" Return-path: Received: from mx1.redhat.com ([209.132.183.28]:44190 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751228AbdEDUj0 (ORCPT ); Thu, 4 May 2017 16:39:26 -0400 In-Reply-To: <9ea5a2ba21b4f8b22a63acf39135a41e2f1da23c.1493928470.git.pavel.belous@aquantia.com> Sender: netdev-owner@vger.kernel.org List-ID: On 05/04/2017 04:10 PM, Pavel Belous wrote: > From: Pavel Belous > > This patch fixes the crash that happens when driver tries to collect statistics > from already released "aq_vec" object. > If adapter is in "down" state we still allow user to see statistics from HW. > > V2: fixed braces around "aq_vec_free". > > Fixes: 97bde5c4f909 ("net: ethernet: aquantia: Support for NIC-specific code") > Signed-off-by: Pavel Belous > --- > drivers/net/ethernet/aquantia/atlantic/aq_nic.c | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c > index cdb0299..9ee1c50 100644 > --- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c > +++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c > @@ -755,7 +755,7 @@ void aq_nic_get_stats(struct aq_nic_s *self, u64 *data) > count = 0U; > > for (i = 0U, aq_vec = self->aq_vec[0]; > - self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) { > + aq_vec && self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) { > data += count; > aq_vec_get_sw_stats(aq_vec, data, &count); > } > @@ -959,8 +959,10 @@ void aq_nic_free_hot_resources(struct aq_nic_s *self) > goto err_exit; > > for (i = AQ_DIMOF(self->aq_vec); i--;) { > - if (self->aq_vec[i]) > + if (self->aq_vec[i]) { > aq_vec_free(self->aq_vec[i]); > + self->aq_vec[i] = NULL; > + } > } > > err_exit:; > Resolves the ethtool crash. Tested-by: David Arcari