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| author | Amir Goldstein <amir73il@gmail.com> | 2017-04-08 14:49:06 +0300 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2017-04-20 16:37:26 +0200 |
| commit | 78757af6518a35bdc22b4e7f660ff9dbbeba35d7 (patch) | |
| tree | 00f718f972f02f174190c99174ac21a8ce2ebdbc /fs/open.c | |
| parent | 33006cdf9c038dca9b3d4c148a509de851a66ea9 (diff) | |
| download | lwn-78757af6518a35bdc22b4e7f660ff9dbbeba35d7.tar.gz lwn-78757af6518a35bdc22b4e7f660ff9dbbeba35d7.zip | |
vfs: ftruncate check IS_APPEND() on real upper inode
ftruncate an overlayfs inode was checking IS_APPEND() on
overlay inode, but overlay inode does not have the S_APPEND flag.
Check IS_APPEND() on real upper inode instead.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/open.c')
| -rw-r--r-- | fs/open.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/open.c b/fs/open.c index 949cef29c3bb..993a91d20cc7 100644 --- a/fs/open.c +++ b/fs/open.c @@ -193,7 +193,8 @@ static long do_sys_ftruncate(unsigned int fd, loff_t length, int small) goto out_putf; error = -EPERM; - if (IS_APPEND(inode)) + /* Check IS_APPEND on real upper inode */ + if (IS_APPEND(file_inode(f.file))) goto out_putf; sb_start_write(inode->i_sb); |