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a=rsa-sha256; c=relaxed/relaxed; d=corigine.onmicrosoft.com; s=selector2-corigine-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=HIRsIkT+cMpyQ4EuKIzy1204ySCRpfhkTuxI7FH/3ww=; b=QEUyWkciyBOGRQyzYWaqsa0VMT83+L9DR2Tt1rZe9JtA+G0kOBIwt2Rzi5MVUUjeWfGqMyINRYu3zpirq86xBaIYq9RsDTpclPDy9eBzP6dt2XMhX6qRNlueXbd2yCeVtpzHfwG4QpM1Sx+TEzipE3zV6TuRo3GFsuBAvCaKxDQ= X-Mailman-Original-Authentication-Results: smtp3.osuosl.org; dkim=pass (1024-bit key) header.d=corigine.onmicrosoft.com header.i=@corigine.onmicrosoft.com header.a=rsa-sha256 header.s=selector2-corigine-onmicrosoft-com header.b=QEUyWkci X-Mailman-Original-Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=corigine.com; Subject: Re: [Intel-wired-lan] [PATCH iwl-net v2] ice: Fix memory management in ice_ethtool_fdir.c X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: netdev@vger.kernel.org, anthony.l.nguyen@intel.com, intel-wired-lan@lists.osuosl.org, Przemek Kitszel Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" On Mon, Jul 03, 2023 at 01:30:00PM +0200, Jedrzej Jagielski wrote: > Fix ethtool FDIR logic to not use momory after its release. > In the ice_ethtool_fdir.c file there are 2 spots where code can > refer to pointers which may be missing. > > In the ice_cfg_fdir_xtrct_seq() function seg may be freed but > even then may be still used by memcpy(&tun_seg[1], seg, sizeof(*seg)). > > In the ice_add_fdir_ethtool() function struct ice_fdir_fltr *input > may firstly fail to be added via ice_fdir_update_list_entry() but then > may be tried to being deleted by ice_fdir_update_list_entry. > > Terminate in both cases when the returned value of the previous > operation is other than 0, free memory and don't use it anymore. > > Replace managed memory alloc with kzalloc/kfree in > ice_cfg_fdir_xtrct_seq() since seg/tun_seg are used only by > ice_fdir_set_hw_fltr_rule(). > > Reported-by: Michal Schmidt > Link: https://bugzilla.redhat.com/show_bug.cgi?id=2208423 > Fixes: cac2a27cd9ab ("ice: Support IPv4 Flow Director filters") > Reviewed-by: Przemek Kitszel > Signed-off-by: Jedrzej Jagielski Reviewed-by: Simon Horman _______________________________________________ Intel-wired-lan mailing list Intel-wired-lan@osuosl.org https://lists.osuosl.org/mailman/listinfo/intel-wired-lan