From ec06cb04376e5abc927a9b85dd768ce8728965bb Mon Sep 17 00:00:00 2001 From: Steve French Date: Tue, 22 Jun 2021 17:54:50 -0500 Subject: [PATCH] smb3: fix possible access to uninitialized pointer to DACL dacl_ptr can be null so we must check for it everywhere it is used in build_sec_desc. Addresses-Coverity: 1475598 ("Explicit null dereference") Signed-off-by: Steve French --- fs/cifs/cifsacl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c index 784407f9280f..25a8139336fa 100644 --- a/fs/cifs/cifsacl.c +++ b/fs/cifs/cifsacl.c @@ -1308,7 +1308,7 @@ static int build_sec_desc(struct cifs_ntsd *pntsd, struct cifs_ntsd *pnntsd, ndacl_ptr = (struct cifs_acl *)((char *)pnntsd + ndacloffset); ndacl_ptr->revision = dacloffset ? dacl_ptr->revision : cpu_to_le16(ACL_REVISION); - ndacl_ptr->num_aces = dacl_ptr->num_aces; + ndacl_ptr->num_aces = dacloffset ? dacl_ptr->num_aces : 0; if (uid_valid(uid)) { /* chown */ uid_t id; -- 2.30.2