linux-kernel - [PATCH 5.10 024/152] cifs: fix interrupted close commands

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Date:   Mon, 18 Jan 2021 12:33:19 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, "Paulo Alcantara (SUSE)" <pc@....nz>,
        Duncan Findlay <duncf@...cf.ca>,
        Pavel Shilovsky <pshilov@...rosoft.com>,
        Steve French <stfrench@...rosoft.com>
Subject: [PATCH 5.10 024/152] cifs: fix interrupted close commands

From: Paulo Alcantara <pc@....nz>

commit 2659d3bff3e1b000f49907d0839178b101a89887 upstream.

Retry close command if it gets interrupted to not leak open handles on
the server.

Signed-off-by: Paulo Alcantara (SUSE) <pc@....nz>
Reported-by: Duncan Findlay <duncf@...cf.ca>
Suggested-by: Pavel Shilovsky <pshilov@...rosoft.com>
Fixes: 6988a619f5b7 ("cifs: allow syscalls to be restarted in __smb_send_rqst()")
Cc: stable@...r.kernel.org
Reviewd-by: Pavel Shilovsky <pshilov@...rosoft.com>
Signed-off-by: Steve French <stfrench@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/cifs/smb2pdu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -3248,7 +3248,7 @@ close_exit:
 	free_rsp_buf(resp_buftype, rsp);
 
 	/* retry close in a worker thread if this one is interrupted */
-	if (rc == -EINTR) {
+	if (is_interrupt_error(rc)) {
 		int tmp_rc;
 
 		tmp_rc = smb2_handle_cancelled_close(tcon, persistent_fid,