diff options
| author | Matthew Wilcox <mawilcox@microsoft.com> | 2017-12-15 12:48:32 -0800 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@microsoft.com> | 2018-02-28 22:09:50 -0500 |
| commit | 2cf1658d93a4e0aba89a249a70d5cdc6f72eaacb (patch) | |
| tree | b117adb3fbdc1d6add5313fc8c08db4802524059 /fs | |
| parent | 1f338384b46b16f9682c8e01f8d158e90e5d6cc2 (diff) | |
cifs: Fix missing put_xid in cifs_file_strict_mmap
[ Upstream commit f04a703c3d613845ae3141bfaf223489de8ab3eb ]
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>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/cifs/file.c | 26 |
1 files changed, 12 insertions, 14 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 47e04038a846..1366d2151389 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -3231,20 +3231,18 @@ static struct vm_operations_struct cifs_file_vm_ops = { 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; } @@ -3254,16 +3252,16 @@ int cifs_file_mmap(struct file *file, struct vm_area_struct *vma) 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; } |