diff options
| author | Roland Dreier <roland@purestorage.com> | 2013-02-09 03:18:40 +0400 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-02-14 00:16:11 +0400 |
| commit | 71f41fe1fafae2e407ef19d8174207f7ff80b387 (patch) | |
| tree | e780f1e3fcfec59f5ff3f876d8850843d52b442c /drivers/target | |
| parent | bb992e72f9b751fceb04afeb7736b6a3e50effcf (diff) | |
| download | linux-71f41fe1fafae2e407ef19d8174207f7ff80b387.tar.xz | |
target: Fix parameter list length checking in MODE SELECT
An empty parameter list (length == 0) is not an error, so succeed MODE
SELECT in this case. If the parameter list length is too small,
return the correct sense code of PARAMETER LIST LENGTH ERROR.
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/target_core_spc.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c index 803339516fb9..4cb667d720a7 100644 --- a/drivers/target/target_core_spc.c +++ b/drivers/target/target_core_spc.c @@ -1000,6 +1000,14 @@ static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) int ret = 0; int i; + if (!cmd->data_length) { + target_complete_cmd(cmd, GOOD); + return 0; + } + + if (cmd->data_length < off + 2) + return TCM_PARAMETER_LIST_LENGTH_ERROR; + buf = transport_kmap_data_sg(cmd); if (!buf) return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; @@ -1024,6 +1032,11 @@ static sense_reason_t spc_emulate_modeselect(struct se_cmd *cmd) goto out; check_contents: + if (cmd->data_length < off + length) { + ret = TCM_PARAMETER_LIST_LENGTH_ERROR; + goto out; + } + if (memcmp(buf + off, tbuf, length)) ret = TCM_INVALID_PARAMETER_LIST; |