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ksmbd: add bounds check for create lease context

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commit bab703ed8472aa9d109c5f8c1863921533363dae upstream.

Add missing bounds check for create lease context.

Cc: stable@vger.kernel.org
Reported-by: Norbert Szetei <norbert@doyensec.com>
Tested-by: Norbert Szetei <norbert@doyensec.com>
Signed-off-by: Norbert Szetei <norbert@doyensec.com>
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:
Norbert Szetei 2025-03-15 12:19:28 +09:00 committed by Greg Kroah-Hartman
parent 8857a956f7
commit 629dd37acc
1 changed files with 8 additions and 0 deletions
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8
fs/smb/server/oplock.c
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@ -1534,6 +1534,10 @@ struct lease_ctx_info *parse_lease_state(void *open_req, bool is_dir)
if (sizeof(struct lease_context_v2) == le32_to_cpu(cc->DataLength)) {
struct create_lease_v2 *lc = (struct create_lease_v2 *)cc;
if (le16_to_cpu(cc->DataOffset) + le32_to_cpu(cc->DataLength) <
sizeof(struct create_lease_v2) - 4)
return NULL;
memcpy(lreq->lease_key, lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
if (is_dir) {
lreq->req_state = lc->lcontext.LeaseState &
@ -1551,6 +1555,10 @@ struct lease_ctx_info *parse_lease_state(void *open_req, bool is_dir)
} else {
struct create_lease *lc = (struct create_lease *)cc;
if (le16_to_cpu(cc->DataOffset) + le32_to_cpu(cc->DataLength) <
sizeof(struct create_lease))
return NULL;
memcpy(lreq->lease_key, lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE);
lreq->req_state = lc->lcontext.LeaseState;
lreq->flags = lc->lcontext.LeaseFlags;