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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-01-15 16:09:50 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-01-15 16:09:50 -0800 |
| commit | 99421c1cb27fb837e93b517036fab4500fe39de5 (patch) | |
| tree | de5fc5bacb671223f389793ad643cebe520bc292 /fs/dcache.c | |
| parent | c92816275674c1491ce228ee49aa030a5fa1be04 (diff) | |
| parent | 93362fa47fe98b62e4a34ab408c4a418432e7939 (diff) | |
| download | op-kernel-dev-99421c1cb27fb837e93b517036fab4500fe39de5.zip op-kernel-dev-99421c1cb27fb837e93b517036fab4500fe39de5.tar.gz | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull namespace fixes from Eric Biederman:
"This tree contains 4 fixes.
The first is a fix for a race that can causes oopses under the right
circumstances, and that someone just recently encountered.
Past that are several small trivial correct fixes. A real issue that
was blocking development of an out of tree driver, but does not appear
to have caused any actual problems for in-tree code. A potential
deadlock that was reported by lockdep. And a deadlock people have
experienced and took the time to track down caused by a cleanup that
removed the code to drop a reference count"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
sysctl: Drop reference added by grab_header in proc_sys_readdir
pid: fix lockdep deadlock warning due to ucount_lock
libfs: Modify mount_pseudo_xattr to be clear it is not a userspace mount
mnt: Protect the mountpoint hashtable with mount_lock
Diffstat (limited to 'fs/dcache.c')
| -rw-r--r-- | fs/dcache.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/dcache.c b/fs/dcache.c index 769903d..95d71ed 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -1336,8 +1336,11 @@ int d_set_mounted(struct dentry *dentry) } spin_lock(&dentry->d_lock); if (!d_unlinked(dentry)) { - dentry->d_flags |= DCACHE_MOUNTED; - ret = 0; + ret = -EBUSY; + if (!d_mountpoint(dentry)) { + dentry->d_flags |= DCACHE_MOUNTED; + ret = 0; + } } spin_unlock(&dentry->d_lock); out: |
