From f5a8b3a796db01b639435515b3adc003b9f27387 Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Wed, 15 Jul 2015 10:55:37 +0300 Subject: scsi: Protect against buffer possible overflow in scsi_set_sense_information Make sure that the input sense buffer has sufficient length to fit the information descriptor (12 additional bytes). Modify scsi_set_sense_information to receive the sense buffer length and adjust its callers scsi target and libata. (Fix patch fuzz in scsi_set_sense_information - nab) Reported-by: Hannes Reinecke Signed-off-by: Sagi Grimberg Reviewed-by: Martin K. Petersen Cc: Tejun Heo Reviewed-by: Christoph Hellwig Signed-off-by: Nicholas Bellinger --- drivers/target/target_core_transport.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) (limited to 'drivers/target') diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 2bece607ca0f..7fb031bbcc8d 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -2729,7 +2729,7 @@ static const struct sense_info sense_info_table[] = { }, }; -static void translate_sense_reason(struct se_cmd *cmd, sense_reason_t reason) +static int translate_sense_reason(struct se_cmd *cmd, sense_reason_t reason) { const struct sense_info *si; u8 *buffer = cmd->sense_buffer; @@ -2756,7 +2756,11 @@ static void translate_sense_reason(struct se_cmd *cmd, sense_reason_t reason) scsi_build_sense_buffer(0, buffer, si->key, asc, ascq); if (si->add_sector_info) - scsi_set_sense_information(buffer, cmd->bad_sector); + return scsi_set_sense_information(buffer, + cmd->scsi_sense_length, + cmd->bad_sector); + + return 0; } int @@ -2774,10 +2778,14 @@ transport_send_check_condition_and_sense(struct se_cmd *cmd, spin_unlock_irqrestore(&cmd->t_state_lock, flags); if (!from_transport) { + int rc; + cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE; - translate_sense_reason(cmd, reason); cmd->scsi_status = SAM_STAT_CHECK_CONDITION; cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER; + rc = translate_sense_reason(cmd, reason); + if (rc) + return rc; } trace_target_cmd_complete(cmd); -- cgit v1.2.3