diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2009-05-08 16:05:57 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2009-05-09 10:51:34 -0400 |
| commit | 2a32cebd6cbcc43996c3e2d114fa32ba1e71192a (patch) | |
| tree | 0ad94849a7bc3e97cd19978005d1898c8bb44b36 /fs/hpfs/super.c | |
| parent | f9dbd05bc97d1d4f17c2057612f6a8e4dbd039e0 (diff) | |
| download | lwn-2a32cebd6cbcc43996c3e2d114fa32ba1e71192a.tar.gz lwn-2a32cebd6cbcc43996c3e2d114fa32ba1e71192a.zip | |
Fix races around the access to ->s_options
Put generic_show_options read access to s_options under rcu_read_lock,
split save_mount_options() into "we are setting it the first time"
(uses in foo_fill_super()) and "we are relacing and freeing the old one",
synchronize_rcu() before kfree() in the latter.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/hpfs/super.c')
| -rw-r--r-- | fs/hpfs/super.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c index fecf402d7b8a..fc77965be841 100644 --- a/fs/hpfs/super.c +++ b/fs/hpfs/super.c @@ -423,8 +423,7 @@ static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) if (!(*flags & MS_RDONLY)) mark_dirty(s); - kfree(s->s_options); - s->s_options = new_opts; + replace_mount_options(s, new_opts); return 0; |