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From: Long Li <longli-Lp/cVzEoVyZiJJESP9tAQJZ3qXmFLfmx@public.gmane.org>
To: Steve French <sfrench-eUNUBHrolfbYtjvyW6yDsg@public.gmane.org>,
	linux-cifs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	samba-technical-w/Ol4Ecudpl8XjKLYN78aQ@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: Long Li <longli-0li6OtcxBFHby3iVrkZq2A@public.gmane.org>
Subject: [PATCH resend] cifs: Do not modify mid entry after submitting I/O in cifs_call_async
Date: Wed, 28 Jun 2017 11:05:54 -0700	[thread overview]
Message-ID: <1498673154-30879-1-git-send-email-longli@exchange.microsoft.com> (raw)

From: Long Li <longli-0li6OtcxBFHby3iVrkZq2A@public.gmane.org>

In cifs_call_async, server response may return as soon as I/O is submitted.
Because mid entry is freed on the return path, do not modify it after I/O is
submitted.

Signed-off-by: Long Li <longli-0li6OtcxBFHby3iVrkZq2A@public.gmane.org>
---
 fs/cifs/transport.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 47a125e..ba62aaf 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -537,10 +537,10 @@ cifs_call_async(struct TCP_Server_Info *server, struct smb_rqst *rqst,
 	spin_unlock(&GlobalMid_Lock);
 
 
+	cifs_save_when_sent(mid);
 	cifs_in_send_inc(server);
 	rc = smb_send_rqst(server, rqst, flags);
 	cifs_in_send_dec(server);
-	cifs_save_when_sent(mid);
 
 	if (rc < 0) {
 		server->sequence_number -= 2;
-- 
2.7.4

WARNING: multiple messages have this Message-ID (diff)
From: Long Li <longli@exchange.microsoft.com>
To: Steve French <sfrench@samba.org>,
	linux-cifs@vger.kernel.org, samba-technical@lists.samba.org,
	linux-kernel@vger.kernel.org
Cc: Long Li <longli@microsoft.com>
Subject: [PATCH resend] cifs: Do not modify mid entry after submitting I/O in cifs_call_async
Date: Wed, 28 Jun 2017 11:05:54 -0700	[thread overview]
Message-ID: <1498673154-30879-1-git-send-email-longli@exchange.microsoft.com> (raw)

From: Long Li <longli@microsoft.com>

In cifs_call_async, server response may return as soon as I/O is submitted.
Because mid entry is freed on the return path, do not modify it after I/O is
submitted.

Signed-off-by: Long Li <longli@microsoft.com>
---
 fs/cifs/transport.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 47a125e..ba62aaf 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -537,10 +537,10 @@ cifs_call_async(struct TCP_Server_Info *server, struct smb_rqst *rqst,
 	spin_unlock(&GlobalMid_Lock);
 
 
+	cifs_save_when_sent(mid);
 	cifs_in_send_inc(server);
 	rc = smb_send_rqst(server, rqst, flags);
 	cifs_in_send_dec(server);
-	cifs_save_when_sent(mid);
 
 	if (rc < 0) {
 		server->sequence_number -= 2;
-- 
2.7.4

             reply	other threads:[~2017-06-28 18:05 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-28 18:05 Long Li [this message]
2017-06-28 18:05 ` [PATCH resend] cifs: Do not modify mid entry after submitting I/O in cifs_call_async Long Li
     [not found] ` <1498673154-30879-1-git-send-email-longli-Lp/cVzEoVyZiJJESP9tAQJZ3qXmFLfmx@public.gmane.org>
2017-06-28 18:23   ` Pavel Shilovsky
2017-06-28 18:23     ` Pavel Shilovsky
     [not found]     ` <CAKywueQZ5hzogURY6sFiv2nJREY9h0KAvbBAsEoNcqApymtxKw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-06-28 18:30       ` Long Li
2017-06-28 18:30         ` Long Li

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