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| author | Tomas Henzl <thenzl@redhat.com> | 2020-06-16 17:04:46 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-06-24 00:23:17 -0400 |
| commit | afe89f115e84edbc76d316759e206580a06c6973 (patch) | |
| tree | 1b49f6c31bce2e2ccb77773a47fc0bd217b41862 /drivers/message | |
| parent | 936e6b85da0476dd2edac7c51c68072da9fb4ba2 (diff) | |
| download | lwn-afe89f115e84edbc76d316759e206580a06c6973.tar.gz lwn-afe89f115e84edbc76d316759e206580a06c6973.zip | |
scsi: mptscsih: Fix read sense data size
The sense data buffer in sense_buf_pool is allocated with size of
MPT_SENSE_BUFFER_ALLOC(64) (multiplied by req_depth) while SNS_LEN(sc)(96)
is used when reading the data. That may lead to a read from unallocated
area, sometimes from another (unallocated) page. To fix this, limit the
read size to MPT_SENSE_BUFFER_ALLOC.
Link: https://lore.kernel.org/r/20200616150446.4840-1-thenzl@redhat.com
Co-developed-by: Stanislav Saner <ssaner@redhat.com>
Signed-off-by: Stanislav Saner <ssaner@redhat.com>
Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/message')
| -rw-r--r-- | drivers/message/fusion/mptscsih.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/message/fusion/mptscsih.c b/drivers/message/fusion/mptscsih.c index f0737c57ed5f..1491561d2e5c 100644 --- a/drivers/message/fusion/mptscsih.c +++ b/drivers/message/fusion/mptscsih.c @@ -118,8 +118,6 @@ int mptscsih_suspend(struct pci_dev *pdev, pm_message_t state); int mptscsih_resume(struct pci_dev *pdev); #endif -#define SNS_LEN(scp) SCSI_SENSE_BUFFERSIZE - /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/ /* @@ -2422,7 +2420,7 @@ mptscsih_copy_sense_data(struct scsi_cmnd *sc, MPT_SCSI_HOST *hd, MPT_FRAME_HDR /* Copy the sense received into the scsi command block. */ req_index = le16_to_cpu(mf->u.frame.hwhdr.msgctxu.fld.req_idx); sense_data = ((u8 *)ioc->sense_buf_pool + (req_index * MPT_SENSE_BUFFER_ALLOC)); - memcpy(sc->sense_buffer, sense_data, SNS_LEN(sc)); + memcpy(sc->sense_buffer, sense_data, MPT_SENSE_BUFFER_ALLOC); /* Log SMART data (asc = 0x5D, non-IM case only) if required. */ |