The branch main has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=68cc77a3b73ffda1e8ac891b9852faca833e11b7
commit 68cc77a3b73ffda1e8ac891b9852faca833e11b7 Author: Mark Johnston <[email protected]> AuthorDate: 2023-12-26 01:42:49 +0000 Commit: Mark Johnston <[email protected]> CommitDate: 2023-12-26 02:04:01 +0000 mpr: Handle errors from copyout() in ioctl handlers In preparation for adding a __result_use_check annotation to copyin() and related functions, start checking for errors from copyout() in the mpr(4) user command handler. This should make it easier to catch bugs. Reviewed by: imp, asomers MFC after: 1 month Differential Revision: https://reviews.freebsd.org/D43177 --- sys/dev/mpr/mpr_user.c | 39 ++++++++++++++++++++++++++------------- 1 file changed, 26 insertions(+), 13 deletions(-) diff --git a/sys/dev/mpr/mpr_user.c b/sys/dev/mpr/mpr_user.c index f2847ae36d66..5245129ce8c1 100644 --- a/sys/dev/mpr/mpr_user.c +++ b/sys/dev/mpr/mpr_user.c @@ -714,9 +714,9 @@ mpr_user_command(struct mpr_softc *sc, struct mpr_usr_command *cmd) } mpr_unlock(sc); - copyout(rpl, cmd->rpl, sz); - if (buf != NULL) - copyout(buf, cmd->buf, cmd->len); + err = copyout(rpl, cmd->rpl, sz); + if (buf != NULL && err == 0) + err = copyout(buf, cmd->buf, cmd->len); mpr_dprint(sc, MPR_USER, "%s: reply size %d\n", __func__, sz); RetFreeUnlocked: @@ -848,7 +848,7 @@ mpr_user_pass_thru(struct mpr_softc *sc, mpr_pass_thru_t *data) /* * Copy the reply data and sense data to user space. */ - if ((cm != NULL) && (cm->cm_reply != NULL)) { + if (err == 0 && cm != NULL && cm->cm_reply != NULL) { rpl = (MPI2_DEFAULT_REPLY *)cm->cm_reply; sz = rpl->MsgLength * 4; @@ -858,7 +858,7 @@ mpr_user_pass_thru(struct mpr_softc *sc, mpr_pass_thru_t *data) __func__, data->ReplySize, sz); } mpr_unlock(sc); - copyout(cm->cm_reply, PTRIN(data->PtrReply), + err = copyout(cm->cm_reply, PTRIN(data->PtrReply), MIN(sz, data->ReplySize)); mpr_lock(sc); } @@ -1073,7 +1073,7 @@ mpr_user_pass_thru(struct mpr_softc *sc, mpr_pass_thru_t *data) /* * Copy the reply data and sense data to user space. */ - if (cm->cm_reply != NULL) { + if (err == 0 && cm->cm_reply != NULL) { rpl = (MPI2_DEFAULT_REPLY *)cm->cm_reply; sz = rpl->MsgLength * 4; @@ -1083,12 +1083,16 @@ mpr_user_pass_thru(struct mpr_softc *sc, mpr_pass_thru_t *data) data->ReplySize, sz); } mpr_unlock(sc); - copyout(cm->cm_reply, PTRIN(data->PtrReply), + err = copyout(cm->cm_reply, PTRIN(data->PtrReply), MIN(sz, data->ReplySize)); + if (err != 0) + mpr_dprint(sc, MPR_FAULT, "%s: failed to copy " + "IOCTL data to user space\n", __func__); mpr_lock(sc); - if ((function == MPI2_FUNCTION_SCSI_IO_REQUEST) || - (function == MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH)) { + if (err == 0 && + (function == MPI2_FUNCTION_SCSI_IO_REQUEST || + function == MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH)) { if (((MPI2_SCSI_IO_REPLY *)rpl)->SCSIState & MPI2_SCSI_STATE_AUTOSENSE_VALID) { sense_len = @@ -1096,8 +1100,13 @@ mpr_user_pass_thru(struct mpr_softc *sc, mpr_pass_thru_t *data) SenseCount)), sizeof(struct scsi_sense_data)); mpr_unlock(sc); - copyout(cm->cm_sense, (PTRIN(data->PtrReply + - sizeof(MPI2_SCSI_IO_REPLY))), sense_len); + err = copyout(cm->cm_sense, + PTRIN(data->PtrReply + + sizeof(MPI2_SCSI_IO_REPLY)), sense_len); + if (err != 0) + mpr_dprint(sc, MPR_FAULT, + "%s: failed to copy IOCTL data to " + "user space\n", __func__); mpr_lock(sc); } } @@ -1116,7 +1125,7 @@ mpr_user_pass_thru(struct mpr_softc *sc, mpr_pass_thru_t *data) * the same IOCTL structure and sense buffers can be used for * NVMe. */ - if (function == MPI2_FUNCTION_NVME_ENCAPSULATED) { + if (err == 0 && function == MPI2_FUNCTION_NVME_ENCAPSULATED) { if (cm->nvme_error_response == NULL) { mpr_dprint(sc, MPR_INFO, "NVMe Error Response " "buffer is NULL. Response data will not be " @@ -1130,9 +1139,13 @@ mpr_user_pass_thru(struct mpr_softc *sc, mpr_pass_thru_t *data) sz = MIN(le32toh(nvme_error_reply->ErrorResponseCount), NVME_ERROR_RESPONSE_SIZE); mpr_unlock(sc); - copyout(cm->cm_sense, + err = copyout(cm->cm_sense, (PTRIN(data->PtrReply + sizeof(MPI2_SCSI_IO_REPLY))), sz); + if (err != 0) + mpr_dprint(sc, MPR_FAULT, + "%s: failed to copy IOCTL data to " + "user space\n", __func__); mpr_lock(sc); } }
