70 lines
2.9 KiB
Diff
70 lines
2.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Guenter Roeck <linux@roeck-us.net>
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Date: Tue, 28 Feb 2023 09:11:29 -0800
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Subject: [PATCH] scsi: megasas: Internal cdbs have 16-byte length
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Host drivers do not necessarily set cdb_len in megasas io commands.
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With commits 6d1511cea0 ("scsi: Reject commands if the CDB length
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exceeds buf_len") and fe9d8927e2 ("scsi: Add buf_len parameter to
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scsi_req_new()"), this results in failures to boot Linux from affected
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SCSI drives because cdb_len is set to 0 by the host driver.
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Set the cdb length to its actual size to solve the problem.
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Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
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(picked-up from https://lists.nongnu.org/archive/html/qemu-devel/2023-02/msg08653.html)
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Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
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---
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hw/scsi/megasas.c | 14 ++------------
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1 file changed, 2 insertions(+), 12 deletions(-)
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diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
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index 32c70c9e99..984b6a3145 100644
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--- a/hw/scsi/megasas.c
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+++ b/hw/scsi/megasas.c
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@@ -1781,7 +1781,7 @@ static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd, int frame_cmd)
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uint8_t cdb[16];
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int len;
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struct SCSIDevice *sdev = NULL;
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- int target_id, lun_id, cdb_len;
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+ int target_id, lun_id;
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lba_count = le32_to_cpu(cmd->frame->io.header.data_len);
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lba_start_lo = le32_to_cpu(cmd->frame->io.lba_lo);
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@@ -1790,7 +1790,6 @@ static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd, int frame_cmd)
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target_id = cmd->frame->header.target_id;
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lun_id = cmd->frame->header.lun_id;
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- cdb_len = cmd->frame->header.cdb_len;
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if (target_id < MFI_MAX_LD && lun_id == 0) {
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sdev = scsi_device_find(&s->bus, 0, target_id, lun_id);
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@@ -1805,15 +1804,6 @@ static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd, int frame_cmd)
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return MFI_STAT_DEVICE_NOT_FOUND;
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}
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- if (cdb_len > 16) {
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- trace_megasas_scsi_invalid_cdb_len(
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- mfi_frame_desc(frame_cmd), 1, target_id, lun_id, cdb_len);
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- megasas_write_sense(cmd, SENSE_CODE(INVALID_OPCODE));
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- cmd->frame->header.scsi_status = CHECK_CONDITION;
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- s->event_count++;
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- return MFI_STAT_SCSI_DONE_WITH_ERROR;
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- }
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-
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cmd->iov_size = lba_count * sdev->blocksize;
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if (megasas_map_sgl(s, cmd, &cmd->frame->io.sgl)) {
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megasas_write_sense(cmd, SENSE_CODE(TARGET_FAILURE));
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@@ -1824,7 +1814,7 @@ static int megasas_handle_io(MegasasState *s, MegasasCmd *cmd, int frame_cmd)
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megasas_encode_lba(cdb, lba_start, lba_count, is_write);
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cmd->req = scsi_req_new(sdev, cmd->index,
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- lun_id, cdb, cdb_len, cmd);
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+ lun_id, cdb, sizeof(cdb), cmd);
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if (!cmd->req) {
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trace_megasas_scsi_req_alloc_failed(
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mfi_frame_desc(frame_cmd), target_id, lun_id);
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