From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 18E2A28EB for ; Mon, 30 Jan 2023 14:10:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8B6A2C4339B; Mon, 30 Jan 2023 14:10:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1675087856; bh=Ea3HdgcfLRb0s72iSO6igcJtvk5vchWAX5O7bCvpTn0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cetrKnl4QkTamVcZUkpBKqD1gs9xNxOSTYLBWiqcF8A8flrup2fC+dJ+LWv+6teES OcNR77mrpt/JubYuu2gR3CV+dcjW0afNQg1zKXzb0lD5BWgXvPXzclNtVO3zNZkAsD M1vV4OdSn6ShgMmmil+qK03VxzmzRtacYhfH72CI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Xingyuan Mo , Jeff Layton , Chuck Lever , Sasha Levin Subject: [PATCH 5.15 032/204] NFSD: fix use-after-free in nfsd4_ssc_setup_dul() Date: Mon, 30 Jan 2023 14:49:57 +0100 Message-Id: <20230130134317.724674113@linuxfoundation.org> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230130134316.327556078@linuxfoundation.org> References: <20230130134316.327556078@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Xingyuan Mo [ Upstream commit e6cf91b7b47ff82b624bdfe2fdcde32bb52e71dd ] If signal_pending() returns true, schedule_timeout() will not be executed, causing the waiting task to remain in the wait queue. Fixed by adding a call to finish_wait(), which ensures that the waiting task will always be removed from the wait queue. Fixes: f4e44b393389 ("NFSD: delay unmount source's export after inter-server copy completed.") Signed-off-by: Xingyuan Mo Reviewed-by: Jeff Layton Signed-off-by: Chuck Lever Signed-off-by: Sasha Levin --- fs/nfsd/nfs4proc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 09dd70f79158..0a900b9e39ea 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1205,6 +1205,7 @@ static __be32 nfsd4_ssc_setup_dul(struct nfsd_net *nn, char *ipaddr, /* allow 20secs for mount/unmount for now - revisit */ if (signal_pending(current) || (schedule_timeout(20*HZ) == 0)) { + finish_wait(&nn->nfsd_ssc_waitq, &wait); kfree(work); return nfserr_eagain; } -- 2.39.0