From: Namjae Jeon <linkinjeon@kernel.org> mainline inclusion from mainline-v6.4-rc1 commit 3ac00a2ab69b34189942afa9e862d5170cdcb018 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I74FF8 CVE: CVE-2023-32248 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- If share is , share->path is NULL and it cause NULL pointer dereference issue. Cc: stable@vger.kernel.org Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-20479 Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: ZhaoLong Wang <wangzhaolong1@huawei.com> --- fs/ksmbd/smb2pdu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 038ca5d0eeef..18e176fcddf0 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -4867,6 +4867,9 @@ static int smb2_get_info_filesystem(struct ksmbd_work *work, int rc = 0, len; int fs_infoclass_size = 0; + if (!share->path) + return -EIO; + rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path); if (rc) { pr_err("cannot create vfs path\n"); -- 2.31.1