From: <gregkh@linuxfoundation.org>
To: mawilcox@microsoft.com, gregkh@linuxfoundation.org, smfrench@gmail.com
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "cifs: Fix missing put_xid in cifs_file_strict_mmap" has been added to the 4.4-stable tree
Date: Tue, 13 Feb 2018 17:32:26 +0100 [thread overview]
Message-ID: <1518539546138186@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
cifs: Fix missing put_xid in cifs_file_strict_mmap
to the 4.4-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:
cifs-fix-missing-put_xid-in-cifs_file_strict_mmap.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From f04a703c3d613845ae3141bfaf223489de8ab3eb Mon Sep 17 00:00:00 2001
From: Matthew Wilcox <mawilcox@microsoft.com>
Date: Fri, 15 Dec 2017 12:48:32 -0800
Subject: cifs: Fix missing put_xid in cifs_file_strict_mmap
From: Matthew Wilcox <mawilcox@microsoft.com>
commit f04a703c3d613845ae3141bfaf223489de8ab3eb upstream.
If cifs_zap_mapping() returned an error, we would return without putting
the xid that we got earlier. Restructure cifs_file_strict_mmap() and
cifs_file_mmap() to be more similar to each other and have a single
point of return that always puts the xid.
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/cifs/file.c | 26 ++++++++++++--------------
1 file changed, 12 insertions(+), 14 deletions(-)
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -3241,20 +3241,18 @@ static const struct vm_operations_struct
int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma)
{
- int rc, xid;
+ int xid, rc = 0;
struct inode *inode = file_inode(file);
xid = get_xid();
- if (!CIFS_CACHE_READ(CIFS_I(inode))) {
+ if (!CIFS_CACHE_READ(CIFS_I(inode)))
rc = cifs_zap_mapping(inode);
- if (rc)
- return rc;
- }
-
- rc = generic_file_mmap(file, vma);
- if (rc == 0)
+ if (!rc)
+ rc = generic_file_mmap(file, vma);
+ if (!rc)
vma->vm_ops = &cifs_file_vm_ops;
+
free_xid(xid);
return rc;
}
@@ -3264,16 +3262,16 @@ int cifs_file_mmap(struct file *file, st
int rc, xid;
xid = get_xid();
+
rc = cifs_revalidate_file(file);
- if (rc) {
+ if (rc)
cifs_dbg(FYI, "Validation prior to mmap failed, error=%d\n",
rc);
- free_xid(xid);
- return rc;
- }
- rc = generic_file_mmap(file, vma);
- if (rc == 0)
+ if (!rc)
+ rc = generic_file_mmap(file, vma);
+ if (!rc)
vma->vm_ops = &cifs_file_vm_ops;
+
free_xid(xid);
return rc;
}
Patches currently in stable-queue which might be from mawilcox@microsoft.com are
queue-4.4/cifs-fix-missing-put_xid-in-cifs_file_strict_mmap.patch
reply other threads:[~2018-02-13 16:35 UTC|newest]
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