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Mon, 18 Dec 2023 15:56:06 +0000 (UTC) Received: from dovecot-director2.suse.de ([10.150.64.162]) by imap2.dmz-prg2.suse.org with ESMTPSA id PlYvAZZrgGVXAgAAn2gu4w (envelope-from ); Mon, 18 Dec 2023 15:56:06 +0000 From: Daniel Wagner To: linux-nvme@lists.infradead.org Cc: linux-kernel@vger.kernel.org, Christoph Hellwig , Sagi Grimberg , Keith Busch , James Smart , Hannes Reinecke , Daniel Wagner Subject: [PATCH v3 10/16] nvmet-fc: hold reference on hostport match Date: Mon, 18 Dec 2023 16:30:58 +0100 Message-ID: <20231218153105.12717-11-dwagner@suse.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231218153105.12717-1-dwagner@suse.de> References: <20231218153105.12717-1-dwagner@suse.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Spam-Level: X-Spam-Level: X-Spamd-Result: default: False [0.90 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_MISSING_CHARSET(2.50)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; REPLY(-4.00)[]; BROKEN_CONTENT_TYPE(1.50)[]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; RCPT_COUNT_SEVEN(0.00)[8]; MID_CONTAINS_FROM(1.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:email]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_ALL(0.00)[]; BAYES_HAM(-0.00)[26.58%] Authentication-Results: smtp-out2.suse.de; none X-Spam-Score: 0.90 X-Spam-Flag: NO Content-Type: text/plain; charset="utf-8" The hostport data structure is shared between the association, this why we keep track of the users via a refcount. So we should not decrement the refcount on a match and free the hostport several times. Reported by KASAN. Signed-off-by: Daniel Wagner Reviewed-by: Hannes Reinecke --- drivers/nvme/target/fc.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c index 0adf65154e27..fa7a6d2edd88 100644 --- a/drivers/nvme/target/fc.c +++ b/drivers/nvme/target/fc.c @@ -1070,8 +1070,6 @@ nvmet_fc_alloc_hostport(struct nvmet_fc_tgtport *tgtp= ort, void *hosthandle) /* new allocation not needed */ kfree(newhost); newhost =3D match; - /* no new allocation - release reference */ - nvmet_fc_tgtport_put(tgtport); } else { newhost->tgtport =3D tgtport; newhost->hosthandle =3D hosthandle; --=20 2.43.0