From c947862f9126983537a4cc11e07d26882d60b7e7 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Mon, 8 Feb 2010 10:12:05 +0000 Subject: CAPI: Fix leaks in capifs_new_ncci When something went wrong during capifs_new_ncci, the looked up dentry was not properly released. Neither was the allocated inode. Refactor the function to avoid leaks. Signed-off-by: Jan Kiszka Signed-off-by: David S. Miller --- drivers/isdn/capi/capifs.c | 25 ++++++++++++++++++------- 1 file changed, 18 insertions(+), 7 deletions(-) (limited to 'drivers/isdn') diff --git a/drivers/isdn/capi/capifs.c b/drivers/isdn/capi/capifs.c index 9f8f67b6c07..dc68fcb122a 100644 --- a/drivers/isdn/capi/capifs.c +++ b/drivers/isdn/capi/capifs.c @@ -152,22 +152,33 @@ static struct dentry *get_node(int num) void capifs_new_ncci(unsigned int number, dev_t device) { struct dentry *dentry; - struct inode *inode = new_inode(capifs_mnt->mnt_sb); - if (!inode) - return; - inode->i_ino = number+2; + struct inode *inode; dentry = get_node(number); + if (IS_ERR(dentry)) + goto unlock_out; + + if (dentry->d_inode) { + dput(dentry); + goto unlock_out; + } + + inode = new_inode(capifs_mnt->mnt_sb); + if (!inode) { + dput(dentry); + goto unlock_out; + } /* config contents is protected by root's i_mutex */ inode->i_uid = config.setuid ? config.uid : current_fsuid(); inode->i_gid = config.setgid ? config.gid : current_fsgid(); inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; + inode->i_ino = number + 2; init_special_inode(inode, S_IFCHR|config.mode, device); - //inode->i_op = &capifs_file_inode_operations; - if (!IS_ERR(dentry) && !dentry->d_inode) - d_instantiate(dentry, inode); + d_instantiate(dentry, inode); + +unlock_out: mutex_unlock(&capifs_root->d_inode->i_mutex); } -- cgit v1.2.3-18-g5258