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ksmbd: fix NULL pointer dereference in smb2_get_info_filesystem()

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commit 3ac00a2ab69b34189942afa9e862d5170cdcb018 upstream.

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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Namjae Jeon 2023-05-03 08:38:33 +09:00 committed by Greg Kroah-Hartman
parent b80422474f
commit a70751dd7b
1 changed files with 3 additions and 0 deletions
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3
fs/ksmbd/smb2pdu.c
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@ -4913,6 +4913,9 @@ 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");