[GIT PULL] SCSI fixes for 5.2-rc3

James Bottomley
2019-06-08T06:05:32Z

Two bug fixes, both for fairly serious problems; the UFS one looks like
it could be used to exfiltrate data from the kernel, although probably
only a privileged user has access to the command management interface
and the missing unlock in smartpqi is long standing and probably a
little used error path.

The patch is available here:

git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git scsi-fixes

The short changelog is:

Avri Altman (1):
scsi: ufs: Check that space was properly alloced in copy_query_response

Dan Carpenter (1):
scsi: smartpqi: unlock on error in pqi_submit_raid_request_synchronous()

And the diffstat:

drivers/scsi/smartpqi/smartpqi_init.c | 6 ++++--
drivers/scsi/ufs/ufshcd.c | 3 ++-
2 files changed, 6 insertions(+), 3 deletions(-)

With full diff below.

James

---

diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
index d6be4e8f4a8f..8fd5ffc55792 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -4046,8 +4046,10 @@ static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
return -ETIMEDOUT;
msecs_blocked =
jiffies_to_msecs(jiffies - start_jiffies);
- if (msecs_blocked >= timeout_msecs)
- return -ETIMEDOUT;
+ if (msecs_blocked >= timeout_msecs) {
+ rc = -ETIMEDOUT;
+ goto out;
+ }
timeout_msecs -= msecs_blocked;
}
}
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 8c1c551f2b42..3fe3029617a8 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1917,7 +1917,8 @@ int ufshcd_copy_query_response(struct ufs_hba *hba, struct ufshcd_lrb *lrbp)
memcpy(&query_res->upiu_res, &lrbp->ucd_rsp_ptr->qr, QUERY_OSF_SIZE);

/* Get the descriptor */
- if (lrbp->ucd_rsp_ptr->qr.opcode == UPIU_QUERY_OPCODE_READ_DESC) {
+ if (hba->dev_cmd.query.descriptor &&
+ lrbp->ucd_rsp_ptr->qr.opcode == UPIU_QUERY_OPCODE_READ_DESC) {
u8 *descp = (u8 *)lrbp->ucd_rsp_ptr +
GENERAL_UPIU_REQUEST_SIZE;
u16 resp_len;