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cifsd: Fix potential null-ptr-deref in smb2_open()

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Fix potential null-ptr-deref in smb2_open().

Signed-off-by: Marios Makassikis <mmakassikis@freebox.fr>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Marios Makassikis 2021-04-15 10:24:56 +09:00 committed by Steve French
parent 5626518eca
commit e6b1059ffa
1 changed files with 5 additions and 2 deletions
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7
fs/cifsd/smb2pdu.c
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@ -2918,13 +2918,16 @@ int smb2_open(struct ksmbd_work *work)
fattr.cf_gid = inode->i_gid;
fattr.cf_mode = inode->i_mode;
fattr.cf_dacls = NULL;
ace_num = 0;
fattr.cf_acls = ksmbd_vfs_get_acl(inode, ACL_TYPE_ACCESS);
ace_num = fattr.cf_acls->a_count;
if (fattr.cf_acls)
ace_num = fattr.cf_acls->a_count;
if (S_ISDIR(inode->i_mode)) {
fattr.cf_dacls =
ksmbd_vfs_get_acl(inode, ACL_TYPE_DEFAULT);
ace_num += fattr.cf_dacls->a_count;
if (fattr.cf_dacls)
ace_num += fattr.cf_dacls->a_count;
}
pntsd = kmalloc(sizeof(struct smb_ntsd) +