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nvmet-tcp: add bounds check on Transfer Tag 

ttag is used as an index to get cmd in nvmet_tcp_handle_h2c_data_pdu(),
add a bounds check to avoid out-of-bounds access.

Signed-off-by: Varun Prakash <varun@chelsio.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Varun Prakash 2022-09-21 00:06:49 +05:30 committed by Christoph Hellwig
parent f614b937d8
commit b6a545ffa2
1 changed files with 9 additions and 2 deletions
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11
drivers/nvme/target/tcp.c
View File

@ -920,10 +920,17 @@ static int nvmet_tcp_handle_h2c_data_pdu(struct nvmet_tcp_queue *queue)
struct nvme_tcp_data_pdu *data = &queue->pdu.data;
struct nvmet_tcp_cmd *cmd;
if (likely(queue->nr_cmds))
if (likely(queue->nr_cmds)) {
if (unlikely(data->ttag >= queue->nr_cmds)) {
pr_err("queue %d: received out of bound ttag %u, nr_cmds %u\n",
queue->idx, data->ttag, queue->nr_cmds);
nvmet_tcp_fatal_error(queue);
return -EPROTO;
}
cmd = &queue->cmds[data->ttag];
else
} else {
cmd = &queue->connect;
}
if (le32_to_cpu(data->data_offset) != cmd->rbytes_done) {
pr_err("ttag %u unexpected data offset %u (expected %u)\n",