scsi: sg: fix minor memory leak in error path

BugLink: https://bugs.launchpad.net/bugs/1835845
commit c170e5a8d222537e98aa8d4fddb667ff7a2ee114 upstream.

Fix a minor memory leak when there is an error opening a /dev/sg device.

Fixes: cc833acbee9d ("sg: O_EXCL and other lock handling")
Cc: <stable@vger.kernel.org>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 7a3b601e3191602532fe81cad481639c2e8530d6..a3862cf5e18471bedc1ac8b9d7117a3173cb77e5 100644 (file)
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -2186,6 +2186,7 @@ sg_add_sfp(Sg_device * sdp)
        write_lock_irqsave(&sdp->sfd_lock, iflags);
        if (atomic_read(&sdp->detaching)) {
                write_unlock_irqrestore(&sdp->sfd_lock, iflags);
+               kfree(sfp);
                return ERR_PTR(-ENODEV);
        }
        list_add_tail(&sfp->sfd_siblings, &sdp->sfds);