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authorLatchesar Ionkov <lucho@ionkov.net>2005-09-22 21:43:53 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-22 22:17:33 -0700
commitf71626a461e7d4af099ca71830ea530e96c22e11 (patch)
tree69cc1ef26c39887a938618d8e8a6f788ae8b4488
parenta1f9d8d23fef301ba0c0b4983e0aa947168e1c37 (diff)
downloadlinux-f71626a461e7d4af099ca71830ea530e96c22e11.tar.bz2
[PATCH] v9fs: don't free root dentry & inode if error occurs in v9fs_get_sb
If error occurs while in v9fs_get_sb after it calles sget, the dentry object of the root and its inode may be freed twice -- once while handling the error in v9fs_get_sb, and second time when v9fs_get_sb calles deactivate_super (which in turn calls v9fs_kill_super) The patch removes the unnecessary code that frees the root dentry and its inode. Signed-off-by: Latchesar Ionkov <lucho@ionkov.net> Cc: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--fs/9p/vfs_super.c24
1 files changed, 7 insertions, 17 deletions
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 868f350b2c5f..1e2b2b54d300 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -129,8 +129,8 @@ static struct super_block *v9fs_get_sb(struct file_system_type
if ((newfid = v9fs_session_init(v9ses, dev_name, data)) < 0) {
dprintk(DEBUG_ERROR, "problem initiating session\n");
- retval = newfid;
- goto free_session;
+ kfree(v9ses);
+ return ERR_PTR(newfid);
}
sb = sget(fs_type, NULL, v9fs_set_super, v9ses);
@@ -150,7 +150,7 @@ static struct super_block *v9fs_get_sb(struct file_system_type
if (!root) {
retval = -ENOMEM;
- goto release_inode;
+ goto put_back_sb;
}
sb->s_root = root;
@@ -159,7 +159,7 @@ static struct super_block *v9fs_get_sb(struct file_system_type
root_fid = v9fs_fid_create(root);
if (root_fid == NULL) {
retval = -ENOMEM;
- goto release_dentry;
+ goto put_back_sb;
}
root_fid->fidopen = 0;
@@ -182,25 +182,15 @@ static struct super_block *v9fs_get_sb(struct file_system_type
if (stat_result < 0) {
retval = stat_result;
- goto release_dentry;
+ goto put_back_sb;
}
return sb;
- release_dentry:
- dput(sb->s_root);
-
- release_inode:
- iput(inode);
-
- put_back_sb:
+put_back_sb:
+ /* deactivate_super calls v9fs_kill_super which will frees the rest */
up_write(&sb->s_umount);
deactivate_super(sb);
- v9fs_session_close(v9ses);
-
- free_session:
- kfree(v9ses);
-
return ERR_PTR(retval);
}