* [PATCH 5.4 171/191] fs: cifs: Fix atime update check vs mtime
[not found] <20200107205332.984228665@linuxfoundation.org>
@ 2020-01-07 20:54 ` Greg Kroah-Hartman
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From: Greg Kroah-Hartman @ 2020-01-07 20:54 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Deepa Dinamani, stfrench, linux-cifs
From: Deepa Dinamani <deepa.kernel@gmail.com>
commit 69738cfdfa7032f45d9e7462d24490e61cf163dd upstream.
According to the comment in the code and commit log, some apps
expect atime >= mtime; but the introduced code results in
atime==mtime. Fix the comparison to guard against atime<mtime.
Fixes: 9b9c5bea0b96 ("cifs: do not return atime less than mtime")
Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com>
Cc: stfrench@microsoft.com
Cc: linux-cifs@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/cifs/inode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -163,7 +163,7 @@ cifs_fattr_to_inode(struct inode *inode,
spin_lock(&inode->i_lock);
/* we do not want atime to be less than mtime, it broke some apps */
- if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime))
+ if (timespec64_compare(&fattr->cf_atime, &fattr->cf_mtime) < 0)
inode->i_atime = fattr->cf_mtime;
else
inode->i_atime = fattr->cf_atime;
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