From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from r3-11.sinamail.sina.com.cn (r3-11.sinamail.sina.com.cn [202.108.3.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5EB293F9F3C for ; Sat, 17 Oct 2026 05:45:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.108.3.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792215927; cv=none; b=NDr5/rPbKAPMJ+iDEILXWyBngwLW/whczIBuwiB08ZfqSpfhn87ikH8jqM6vLoYH3ThslT6oT2dJ2prxdoROQZujECMeJnohVBJzAv1FnDIpure1q+6ObZ9hkVDVSFnbH2Ch7KEkaxifNIXr5h4wkdhg3oXGb/k+MgoqAKzykEg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792215927; c=relaxed/simple; bh=4Z06arjgYdjBh2GrWJg9yOvseOZAdbJxeqp9Hy+zvKE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=vFtOXWImt65tlrtp/FY8e2y/cURmTi1wSak2JxgRdSChnMYCyCKE9bcavWoshRibtdOc3slyr/5aCSplMRfcnhfPz2NIG+tmWDlAbH4OAqk9kngp82eJpYmSVCfjBFPQZLexgjVo6FCeub2gV9NzMKKFaZ8nk7yFPOmEBX4PdGU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com; spf=pass smtp.mailfrom=sina.com; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b=MJHzl9Ft; arc=none smtp.client-ip=202.108.3.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sina.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b="MJHzl9Ft" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sina.com; s=201208; t=1792215922; bh=+d2KJdB04dQ047eI25m+hGvmBYY5N8jOXMu16DOgI0I=; h=From:Subject:Date:Message-ID; b=MJHzl9Ft6Ln2u5KXZVjv9QUyVaoIocVq//0C/w6XOCAGeH1NBMBxWQMu6SEdNQZuo WQTINDmXu7EYT0hn5Ua5FfHCmliJ0BGiVzz9gUP6l7CmaAxVh+oegsEUTBQ6IvIxiq zIDTlrgih3VzNGDVxrPE8d7rvM1PV5eAGSzcFTT8= X-SMAIL-HELO: localhost.localdomain Received: from unknown (HELO localhost.localdomain)([114.254.3.93]) by sina.com (10.54.253.34) with ESMTP id 6AD30AD40000418F; Sat, 17 Oct 2026 13:42:48 +0800 (CST) X-Sender: hdanton@sina.com X-Auth-ID: hdanton@sina.com Authentication-Results: sina.com; spf=none smtp.mailfrom=hdanton@sina.com; dkim=none header.i=none; dmarc=none action=none header.from=hdanton@sina.com X-SMAIL-MID: 7281556291745 X-SMAIL-UIID: A09AE63EC7724E98B21F0DAEFE84CE48-20261017-134248-1 From: Hillf Danton To: syzbot Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [nvme?] BUG: corrupted list in nvmet_fc_remove_port Date: Sat, 17 Oct 2026 13:42:34 +0800 Message-ID: <20261017054235.608-1-hdanton@sina.com> In-Reply-To: <6acbc835.a150a118.27e199.003c.GAE@google.com> References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit > 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 @@ -1271,9 +1271,17 @@ nvmet_fc_portentry_bind(struct nvmet_fc_ static void nvmet_fc_portentry_unbind(struct nvmet_fc_port_entry *pe) { + struct nvmet_fc_port_entry *entry; unsigned long flags; spin_lock_irqsave(&nvmet_fc_tgtlock, flags); + list_for_each_entry(entry, &nvmet_fc_portentry_list, pe_list) { + if (entry == pe) + goto out; + } + spin_unlock_irqrestore(&nvmet_fc_tgtlock, flags); + return; +out: if (pe->tgtport) { nvmet_fc_tgtport_put(pe->tgtport); pe->tgtport->pe = NULL; @@ -1643,8 +1651,10 @@ nvmet_fc_unregister_targetport(struct nv nvmet_fc_portentry_unbind_tgt(tgtport); + spin_lock_irqsave(&nvmet_fc_tgtlock, flags); /* terminate any outstanding associations */ __nvmet_fc_free_assocs(tgtport); + spin_unlock_irqrestore(&nvmet_fc_tgtlock, flags); flush_workqueue(nvmet_wq); @@ -2927,8 +2937,10 @@ nvmet_fc_remove_port(struct nvmet_port * nvmet_fc_portentry_unbind(pe); if (tgtport) { + spin_lock_irqsave(&nvmet_fc_tgtlock, flags); /* terminate any outstanding associations */ __nvmet_fc_free_assocs(tgtport); + spin_unlock_irqrestore(&nvmet_fc_tgtlock, flags); nvmet_fc_tgtport_put(tgtport); } --