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cifs: check MaxPathNameComponentLength != 0 before using it
commit f74bc7c667
upstream.
And fix tcon leak in error path.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: David Disseldorp <ddiss@samba.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -193,7 +193,8 @@ check_name(struct dentry *direntry, struct cifs_tcon *tcon)
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struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
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int i;
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if (unlikely(direntry->d_name.len >
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if (unlikely(tcon->fsAttrInfo.MaxPathNameComponentLength &&
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direntry->d_name.len >
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le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength)))
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return -ENAMETOOLONG;
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@ -509,7 +510,7 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry,
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rc = check_name(direntry, tcon);
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if (rc)
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goto out_free_xid;
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goto out;
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server = tcon->ses->server;
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