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Tue, 14 Apr 2026 07:30:11 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id v42tNwPt3WmiVQAAD6G6ig (envelope-from ); Tue, 14 Apr 2026 07:30:11 +0000 Date: Tue, 14 Apr 2026 09:30:10 +0200 From: Petr Vorel To: Leon Romanovsky Cc: Andrea Cervesato , Linux Test Project , Eric Biggers , Doug Ledford , Jason Gunthorpe , linux-rdma@vger.kernel.org, rds-devel@oss.oracle.com Subject: Re: [LTP] [PATCH 2/2] device-drivers/rdma: Add ucma_uaf01 test Message-ID: <20260414073010.GB230573@pevik> Reply-To: Petr Vorel References: <20260325-infiniband_rdma-v1-0-9c1bd3e69d29@suse.com> <20260325-infiniband_rdma-v1-2-9c1bd3e69d29@suse.com> <20260407132426.GC25645@pevik> <20260412141439.GD21470@unreal> Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260412141439.GD21470@unreal> X-Spamd-Result: default: False [-3.50 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_RHS_NOT_FQDN(0.50)[]; HAS_REPLYTO(0.30)[pvorel@suse.cz]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; FUZZY_RATELIMITED(0.00)[rspamd.com]; RCVD_VIA_SMTP_AUTH(0.00)[]; MISSING_XM_UA(0.00)[]; ARC_NA(0.00)[]; TO_DN_SOME(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; RCPT_COUNT_SEVEN(0.00)[8]; DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; FROM_HAS_DN(0.00)[]; FREEMAIL_CC(0.00)[suse.de,lists.linux.it,gmail.com,redhat.com,ziepe.ca,vger.kernel.org,oss.oracle.com]; RCVD_TLS_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.cz:replyto,suse.cz:email,suse.com:email]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; REPLYTO_EQ_FROM(0.00)[] X-Spam-Flag: NO X-Spam-Score: -3.50 X-Spam-Level: Hi Leon, all, > On Tue, Apr 07, 2026 at 03:24:26PM +0200, Petr Vorel wrote: > > Hi Andrea, > > it's been long time since this use-after-free was fixed, but IMHO still useful > > to have a test (it's also kind of smoke test for rdma_cm). > > Anyway, LGTM, but it'd be nice to reproduce the bug. > > Reviewed-by: Petr Vorel > > > Test for use-after-free in RDMA UCMA triggered by racing CREATE_ID, > > > BIND_IP, and LISTEN operations. Three threads concurrently issue > > > these commands to /dev/infiniband/rdma_cm and the test checks for > > > kernel taint (KASAN use-after-free detection). > > > The bug was fixed by kernel commit 5fe23f262e05 > > > ("ucma: fix a use-after-free in ucma_resolve_ip()"). > > > Signed-off-by: Andrea Cervesato > > > --- > > > runtest/kernel_misc | 1 + > > > testcases/kernel/device-drivers/Makefile | 1 + > > > testcases/kernel/device-drivers/rdma/.gitignore | 1 + > > > testcases/kernel/device-drivers/rdma/Makefile | 7 + > > > testcases/kernel/device-drivers/rdma/ucma_uaf01.c | 208 ++++++++++++++++++++++ > > > 5 files changed, 218 insertions(+) > <...> > > > +static struct tst_test test = { > > > + .test_all = run, > > > + .setup = setup, > > > + .cleanup = cleanup, > > > + .runtime = 300, > > > + .needs_root = 1, > > > + .taint_check = TST_TAINT_W | TST_TAINT_D, > > > + .needs_kconfigs = (const char *[]) { > > > + "CONFIG_INFINIBAND", > > > + "CONFIG_INFINIBAND_USER_ACCESS", > I’m not familiar with the LTP tests, but I wanted to point out that these > config options are insufficient. You need an actual or virtual RDMA device > connected to rdma-cm for the tests to work correctly. Leon, thanks for looking into it. FYI these are just config options to skip kernels without required kernel modules. So using /dev/infiniband/rdma_cm (via RDMA_CM_DEV) is not enough, we need another device? Kind regards, Petr From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from picard.linux.it (picard.linux.it [213.254.12.146]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0C4B1F531F1 for ; Tue, 14 Apr 2026 07:30:40 +0000 (UTC) Received: from picard.linux.it (localhost [IPv6:::1]) by picard.linux.it (Postfix) with ESMTP id 618D83E26A0 for ; Tue, 14 Apr 2026 09:30:39 +0200 (CEST) Received: from in-4.smtp.seeweb.it (in-4.smtp.seeweb.it [217.194.8.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1)) (No client certificate requested) by picard.linux.it (Postfix) with ESMTPS id 762BF3C6334 for ; Tue, 14 Apr 2026 09:30:19 +0200 (CEST) Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2a07:de40:b251:101:10:150:64:2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by in-4.smtp.seeweb.it (Postfix) with ESMTPS id BCD8F10005A0 for ; 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