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authorAl Viro <viro@www.linux.org.uk>2005-06-06 13:36:12 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-06 14:42:27 -0700
commit39ca6d49759346d4710c759d443eec8048b27213 (patch)
tree559f7d4f5536d2f155ef4301bb2e4056e7a5e587 /fs
parentd9d29a29669f96903d9950bb881c2a393fd33849 (diff)
downloadop-kernel-dev-39ca6d49759346d4710c759d443eec8048b27213.zip
op-kernel-dev-39ca6d49759346d4710c759d443eec8048b27213.tar.gz
[PATCH] namei fixes (16/19)
Conditional mntput() moved into __do_follow_link(). There it collapses with unconditional mntget() on the same sucker, closing another too-early-mntput() race. Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/namei.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/fs/namei.c b/fs/namei.c
index 6a88468..444086d 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -506,7 +506,8 @@ static inline int __do_follow_link(struct path *path, struct nameidata *nd)
touch_atime(nd->mnt, dentry);
nd_set_link(nd, NULL);
- mntget(path->mnt);
+ if (path->mnt == nd->mnt)
+ mntget(path->mnt);
error = dentry->d_inode->i_op->follow_link(dentry, nd);
if (!error) {
char *s = nd_get_link(nd);
@@ -543,8 +544,6 @@ static inline int do_follow_link(struct path *path, struct nameidata *nd)
current->link_count++;
current->total_link_count++;
nd->depth++;
- if (path->mnt != nd->mnt)
- mntput(path->mnt);
err = __do_follow_link(path, nd);
current->link_count--;
nd->depth--;
@@ -1550,8 +1549,6 @@ do_link:
error = security_inode_follow_link(path.dentry, nd);
if (error)
goto exit_dput;
- if (nd->mnt != path.mnt)
- mntput(path.mnt);
error = __do_follow_link(&path, nd);
if (error)
return error;
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