Re: [syzbot] [nvme?] BUG: corrupted list in nvmet_fc_remove_port

[Hillf Danton <hdanton@sina.com>]

> Date: Sun, 11 Oct 2026 10:32:37 -0700	[thread overview]
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    a5ebb76233b7 Merge tag 'edac_urgent_for_v7.3_rc7' of git:/..
> git tree:       upstream
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=1494923e580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=df4bbab1c2172b9f
> dashboard link: https://syzkaller.appspot.com/bug?extid=c98b21427617af7f547a
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=126a0f15580000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=166a0f15580000

#syz test

--- x/drivers/nvme/target/fc.c
+++ y/drivers/nvme/target/fc.c
@@ -1273,7 +1273,14 @@ nvmet_fc_portentry_unbind(struct nvmet_f
 {
 	unsigned long flags;
 
+	if (!pe->port)
+		return;
 	spin_lock_irqsave(&nvmet_fc_tgtlock, flags);
+	if (!pe->port) {
+		spin_unlock_irqrestore(&nvmet_fc_tgtlock, flags);
+		return;
+	}
+	pe->port = NULL;
 	if (pe->tgtport) {
 		nvmet_fc_tgtport_put(pe->tgtport);
 		pe->tgtport->pe = NULL;
--