A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-30 11:41:38 -04:00
Code Issues Projects Releases Packages Wiki Activity

9p: if v9fs_fid_lookup() gets to asking server, it'd better have hashed dentry

Browse source 
... otherwise the path we'd built isn't worth much.  Don't accept such fids
obtained from paths unless dentry is still alived by the end of the work.

Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Al Viro 2013-02-28 01:50:20 -05:00
commit 5e608671df
1 changed files with 17 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

20
fs/9p/fid.c
View file

@ -41,10 +41,15 @@
*
*/
static inline void __add_fid(struct dentry *dentry, struct p9_fid *fid)
{
hlist_add_head(&fid->dlist, (struct hlist_head *)&dentry->d_fsdata);
}
void v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid)
{
spin_lock(&dentry->d_lock);
hlist_add_head(&fid->dlist, (struct hlist_head *)&dentry->d_fsdata);
__add_fid(dentry, fid);
spin_unlock(&dentry->d_lock);
}
@ -198,8 +203,17 @@ static struct p9_fid *v9fs_fid_lookup_with_uid(struct dentry *dentry,
}
kfree(wnames);
fid_out:
if (!IS_ERR(fid))
v9fs_fid_add(dentry, fid);
if (!IS_ERR(fid)) {
spin_lock(&dentry->d_lock);
if (d_unhashed(dentry)) {
spin_unlock(&dentry->d_lock);
p9_client_clunk(fid);
fid = ERR_PTR(-ENOENT);
} else {
__add_fid(dentry, fid);
spin_unlock(&dentry->d_lock);
}
}
err_out:
up_read(&v9ses->rename_sem);
return fid;