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| author | Arun Easi <aeasi@marvell.com> | 2020-01-23 20:50:14 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-11 04:34:05 -0800 |
| commit | 7a33aeda848eb9f03227b554cdc12ca0520d84e2 (patch) | |
| tree | e652d5ad34386d2fd4d5c18546a0092a1d8715aa /drivers/scsi/qla2xxx | |
| parent | 148c920ee5327d559d6856c1546015cfb4c96dfd (diff) | |
| download | linux-stable-7a33aeda848eb9f03227b554cdc12ca0520d84e2.tar.gz linux-stable-7a33aeda848eb9f03227b554cdc12ca0520d84e2.tar.bz2 linux-stable-7a33aeda848eb9f03227b554cdc12ca0520d84e2.zip | |
scsi: qla2xxx: Fix unbound NVME response length
commit 00fe717ee1ea3c2979db4f94b1533c57aed8dea9 upstream.
On certain cases when response length is less than 32, NVME response data
is supplied inline in IOCB. This is indicated by some combination of state
flags. There was an instance when a high, and incorrect, response length
was indicated causing driver to overrun buffers. Fix this by checking and
limiting the response payload length.
Fixes: 7401bc18d1ee3 ("scsi: qla2xxx: Add FC-NVMe command handling")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200124045014.23554-1-hmadhani@marvell.com
Signed-off-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/scsi/qla2xxx')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_dbg.c | 6 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_dbg.h | 6 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_isr.c | 12 |
3 files changed, 18 insertions, 6 deletions
diff --git a/drivers/scsi/qla2xxx/qla_dbg.c b/drivers/scsi/qla2xxx/qla_dbg.c index c7533fa7f46e..36871760a5d3 100644 --- a/drivers/scsi/qla2xxx/qla_dbg.c +++ b/drivers/scsi/qla2xxx/qla_dbg.c @@ -2520,12 +2520,6 @@ qla83xx_fw_dump_failed: /* Driver Debug Functions. */ /****************************************************************************/ -static inline int -ql_mask_match(uint32_t level) -{ - return (level & ql2xextended_error_logging) == level; -} - /* * This function is for formatting and logging debug information. * It is to be used when vha is available. It formats the message diff --git a/drivers/scsi/qla2xxx/qla_dbg.h b/drivers/scsi/qla2xxx/qla_dbg.h index 8877aa97d829..ceca6dd34db1 100644 --- a/drivers/scsi/qla2xxx/qla_dbg.h +++ b/drivers/scsi/qla2xxx/qla_dbg.h @@ -374,3 +374,9 @@ extern int qla24xx_dump_ram(struct qla_hw_data *, uint32_t, uint32_t *, extern void qla24xx_pause_risc(struct device_reg_24xx __iomem *, struct qla_hw_data *); extern int qla24xx_soft_reset(struct qla_hw_data *); + +static inline int +ql_mask_match(uint level) +{ + return (level & ql2xextended_error_logging) == level; +} diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c index 01ded6c6ad38..f9b3151f4b10 100644 --- a/drivers/scsi/qla2xxx/qla_isr.c +++ b/drivers/scsi/qla2xxx/qla_isr.c @@ -1876,6 +1876,18 @@ static void qla24xx_nvme_iocb_entry(scsi_qla_host_t *vha, struct req_que *req, inbuf = (uint32_t *)&sts->nvme_ersp_data; outbuf = (uint32_t *)fd->rspaddr; iocb->u.nvme.rsp_pyld_len = le16_to_cpu(sts->nvme_rsp_pyld_len); + if (unlikely(iocb->u.nvme.rsp_pyld_len > + sizeof(struct nvme_fc_ersp_iu))) { + if (ql_mask_match(ql_dbg_io)) { + WARN_ONCE(1, "Unexpected response payload length %u.\n", + iocb->u.nvme.rsp_pyld_len); + ql_log(ql_log_warn, fcport->vha, 0x5100, + "Unexpected response payload length %u.\n", + iocb->u.nvme.rsp_pyld_len); + } + iocb->u.nvme.rsp_pyld_len = + sizeof(struct nvme_fc_ersp_iu); + } iter = iocb->u.nvme.rsp_pyld_len >> 2; for (; iter; iter--) *outbuf++ = swab32(*inbuf++); |