diff options
| author | Kent Overstreet <koverstreet@google.com> | 2013-03-22 11:18:24 -0700 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2013-03-22 16:55:15 -0400 |
| commit | e49dbbf3e770aa590a8a464ac4978a09027060b9 (patch) | |
| tree | 9fc8101f40b8205079f5313c8f8207cefb099959 /fs | |
| parent | ac534ff2d5508bdff1358a55d88053da729ff46b (diff) | |
| download | lwn-e49dbbf3e770aa590a8a464ac4978a09027060b9.tar.gz lwn-e49dbbf3e770aa590a8a464ac4978a09027060b9.zip | |
nfsd: fix bad offset use
vfs_writev() updates the offset argument - but the code then passes the
offset to vfs_fsync_range(). Since offset now points to the offset after
what was just written, this is probably not what was intended
Introduced by face15025ffdf664de95e86ae831544154d26c9c "nfsd: use
vfs_fsync_range(), not O_SYNC, for stable writes".
Signed-off-by: Kent Overstreet <koverstreet@google.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: stable@vger.kernel.org
Reviewed-by: Zach Brown <zab@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfsd/vfs.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 2a7eb536de0b..2b2e2396a869 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1013,6 +1013,7 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file, int host_err; int stable = *stablep; int use_wgather; + loff_t pos = offset; dentry = file->f_path.dentry; inode = dentry->d_inode; @@ -1025,7 +1026,7 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file, /* Write the data. */ oldfs = get_fs(); set_fs(KERNEL_DS); - host_err = vfs_writev(file, (struct iovec __user *)vec, vlen, &offset); + host_err = vfs_writev(file, (struct iovec __user *)vec, vlen, &pos); set_fs(oldfs); if (host_err < 0) goto out_nfserr; |