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| author | Al Viro <viro@zeniv.linux.org.uk> | 2010-01-16 12:57:40 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2010-01-16 12:57:40 -0500 |
| commit | df1a1ad29739f032f8905310796e558589403d61 (patch) | |
| tree | e8ef57ed776c5dd5615a6fbdb74609c631b7f2a9 /fs/namespace.c | |
| parent | 8ad08d8a0c3823e9b06ef84c362c9361be323d2d (diff) | |
| download | lwn-df1a1ad29739f032f8905310796e558589403d61.tar.gz lwn-df1a1ad29739f032f8905310796e558589403d61.zip | |
attach_recursive_mnt() needs to hold vfsmount_lock over set_mnt_shared()
race in mnt_flags update
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namespace.c')
| -rw-r--r-- | fs/namespace.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index 461090a57b33..4de493ea67cf 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1354,12 +1354,12 @@ static int attach_recursive_mnt(struct vfsmount *source_mnt, if (err) goto out_cleanup_ids; + spin_lock(&vfsmount_lock); + if (IS_MNT_SHARED(dest_mnt)) { for (p = source_mnt; p; p = next_mnt(p, source_mnt)) set_mnt_shared(p); } - - spin_lock(&vfsmount_lock); if (parent_path) { detach_mnt(source_mnt, parent_path); attach_mnt(source_mnt, path); |