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| author | Al Viro <viro@www.linux.org.uk> | 2005-06-06 13:36:12 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-06 14:42:27 -0700 |
| commit | 39ca6d49759346d4710c759d443eec8048b27213 (patch) | |
| tree | 559f7d4f5536d2f155ef4301bb2e4056e7a5e587 | |
| parent | d9d29a29669f96903d9950bb881c2a393fd33849 (diff) | |
| download | linux-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>
| -rw-r--r-- | fs/namei.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/fs/namei.c b/fs/namei.c index 6a884682b0a7..444086d441e1 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; |