This is a note to let you know that I've just added the patch titled
smb3: interface count displayed incorrectly
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
smb3-interface-count-displayed-incorrectly.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 096bbeec7bd6fb683831a9ca4850a6b6a3f04740 Mon Sep 17 00:00:00 2001
From: Steve French <stfrench@xxxxxxxxxxxxx>
Date: Sat, 15 Oct 2022 17:02:30 -0500
Subject: smb3: interface count displayed incorrectly
From: Steve French <stfrench@xxxxxxxxxxxxx>
commit 096bbeec7bd6fb683831a9ca4850a6b6a3f04740 upstream.
The "Server interfaces" count in /proc/fs/cifs/DebugData increases
as the interfaces are requeried, rather than being reset to the new
value. This could cause a problem if the server disabled
multichannel as the iface_count is checked in try_adding_channels
to see if multichannel still supported.
Also fixes a coverity warning:
Addresses-Coverity: 1526374 ("Concurrent data access violations (MISSING_LOCK)")
Cc: <stable@xxxxxxxxxxxxxxx>
Reviewed-by: Bharath SM <bharathsm@xxxxxxxxxxxxx>
Reviewed-by: Shyam Prasad N <sprasad@xxxxxxxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/cifs/smb2ops.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -530,6 +530,7 @@ parse_server_interfaces(struct network_i
p = buf;
spin_lock(&ses->iface_lock);
+ ses->iface_count = 0;
/*
* Go through iface_list and do kref_put to remove
* any unused ifaces. ifaces in use will be removed
@@ -650,9 +651,9 @@ parse_server_interfaces(struct network_i
kref_put(&iface->refcount, release_iface);
} else
list_add_tail(&info->iface_head, &ses->iface_list);
- spin_unlock(&ses->iface_lock);
ses->iface_count++;
+ spin_unlock(&ses->iface_lock);
ses->iface_last_update = jiffies;
next_iface:
nb_iface++;
Patches currently in stable-queue which might be from stfrench@xxxxxxxxxxxxx are
queue-6.0/smb3-interface-count-displayed-incorrectly.patch
