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| author | Varun Prakash <varun@chelsio.com> | 2022-09-20 21:36:49 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2022-09-27 10:22:08 +0300 |
| commit | b6a545ffa2c192b1e6da4a7924edac5ba9f4ea2b (patch) | |
| tree | 446e00e2bd252c66f8a0191b4d4eea5c9fe6b0cf /drivers/nvme/target | |
| parent | f614b937d850193588f161ff854a4e19940a5e43 (diff) | |
| download | linux-b6a545ffa2c192b1e6da4a7924edac5ba9f4ea2b.tar.xz | |
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>
Diffstat (limited to 'drivers/nvme/target')
| -rw-r--r-- | drivers/nvme/target/tcp.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c index 1762e2e90585..98e17ea184d6 100644 --- a/drivers/nvme/target/tcp.c +++ b/drivers/nvme/target/tcp.c @@ -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", |