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[2/2] scsi: libfc: drop extra rport reference in fc_rport_create()

Message ID 1575997050-12959-3-git-send-email-igor.druzhinin@citrix.com (mailing list archive)
State Deferred
Headers show
Series Fixing libfc memory leaks | expand

Commit Message

Igor Druzhinin Dec. 10, 2019, 4:57 p.m. UTC
The callers of this function seem to assume the reference is not taken
in case rport already exists. This results in one extra reference taken
on each rport re-discovery that will eventually get to inability to
free rport structure on port removal.

Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com>
---
 drivers/scsi/libfc/fc_rport.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index da6e97d..a43f9dd 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -133,8 +133,10 @@  struct fc_rport_priv *fc_rport_create(struct fc_lport *lport, u32 port_id)
 	lockdep_assert_held(&lport->disc.disc_mutex);
 
 	rdata = fc_rport_lookup(lport, port_id);
-	if (rdata)
+	if (rdata) {
+		kref_put(&rdata->kref, fc_rport_destroy);
 		return rdata;
+	}
 
 	if (lport->rport_priv_size > 0)
 		rport_priv_size = lport->rport_priv_size;