diff options
| author | Shuhao Fu <sfual@cse.ust.hk> | 2025-10-16 02:52:55 +0000 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2025-10-15 22:09:46 -0500 |
| commit | c2b77f42205ef485a647f62082c442c1cd69d3fc (patch) | |
| tree | 64b1b8a60567368bbb49555615ff13ada1459615 | |
| parent | d451a0e88e9fa710df33f8dd5dc7ca63e22ef211 (diff) | |
smb: client: Fix refcount leak for cifs_sb_tlink
Fix three refcount inconsistency issues related to `cifs_sb_tlink`.
Comments for `cifs_sb_tlink` state that `cifs_put_tlink()` needs to be
called after successful calls to `cifs_sb_tlink()`. Three calls fail to
update refcount accordingly, leading to possible resource leaks.
Fixes: 8ceb98437946 ("CIFS: Move rename to ops struct")
Fixes: 2f1afe25997f ("cifs: Use smb 2 - 3 and cifsacl mount options getacl functions")
Fixes: 366ed846df60 ("cifs: Use smb 2 - 3 and cifsacl mount options setacl function")
Cc: stable@vger.kernel.org
Signed-off-by: Shuhao Fu <sfual@cse.ust.hk>
Signed-off-by: Steve French <stfrench@microsoft.com>
| -rw-r--r-- | fs/smb/client/inode.c | 6 | ||||
| -rw-r--r-- | fs/smb/client/smb2ops.c | 8 |
2 files changed, 8 insertions, 6 deletions
diff --git a/fs/smb/client/inode.c b/fs/smb/client/inode.c index 239dd84a336f..098a79b7a959 100644 --- a/fs/smb/client/inode.c +++ b/fs/smb/client/inode.c @@ -2431,8 +2431,10 @@ cifs_do_rename(const unsigned int xid, struct dentry *from_dentry, tcon = tlink_tcon(tlink); server = tcon->ses->server; - if (!server->ops->rename) - return -ENOSYS; + if (!server->ops->rename) { + rc = -ENOSYS; + goto do_rename_exit; + } /* try path-based rename first */ rc = server->ops->rename(xid, tcon, from_dentry, diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c index 7c392cf5940b..95cd484cfbba 100644 --- a/fs/smb/client/smb2ops.c +++ b/fs/smb/client/smb2ops.c @@ -3212,8 +3212,7 @@ get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); if (!utf16_path) { rc = -ENOMEM; - free_xid(xid); - return ERR_PTR(rc); + goto put_tlink; } oparms = (struct cifs_open_parms) { @@ -3245,6 +3244,7 @@ get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); } +put_tlink: cifs_put_tlink(tlink); free_xid(xid); @@ -3285,8 +3285,7 @@ set_smb2_acl(struct smb_ntsd *pnntsd, __u32 acllen, utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); if (!utf16_path) { rc = -ENOMEM; - free_xid(xid); - return rc; + goto put_tlink; } oparms = (struct cifs_open_parms) { @@ -3307,6 +3306,7 @@ set_smb2_acl(struct smb_ntsd *pnntsd, __u32 acllen, SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); } +put_tlink: cifs_put_tlink(tlink); free_xid(xid); return rc; |