diff options
| author | Arun Easi <aeasi@marvell.com> | 2019-08-23 02:52:33 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-08-29 18:44:22 -0400 |
| commit | 47aeee5549cf9326656a8f9190960dfd35c101e2 (patch) | |
| tree | 42db22cd688d96116c3eb299efd89c74efa037df | |
| parent | 4909e153e608360702ad34f76f72190bfaec3d9d (diff) | |
scsi: qedf: Fix crash during sg_reset
Driver was attempting to print cdb[0], which is not set for resets coming
from SCSI ioctls. Check for cmd_len before accessing cmnd.
Crash info:
[84790.864747] BUG: unable to handle kernel NULL pointer dereference at (null)
[84790.864783] IP: qedf_initiate_tmf+0x7a/0x6e0 [qedf]
[84790.865204] Call Trace:
[84790.865246] scsi_try_target_reset+0x2b/0x90 [scsi_mod]
[84790.865266] scsi_ioctl_reset+0x20f/0x2a0 [scsi_mod]
[84790.865284] scsi_ioctl+0x131/0x3a0 [scsi_mod]
Signed-off-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/qedf/qedf_io.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/qedf/qedf_io.c b/drivers/scsi/qedf/qedf_io.c index 5b428922b83e..7377a534ff0e 100644 --- a/drivers/scsi/qedf/qedf_io.c +++ b/drivers/scsi/qedf/qedf_io.c @@ -2403,8 +2403,8 @@ int qedf_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags) QEDF_ERR(NULL, "tm_flags 0x%x sc_cmd %p op = 0x%02x target_id = 0x%x lun=%d\n", - tm_flags, sc_cmd, sc_cmd->cmnd[0], rport->scsi_target_id, - (int)sc_cmd->device->lun); + tm_flags, sc_cmd, sc_cmd->cmd_len ? sc_cmd->cmnd[0] : 0xff, + rport->scsi_target_id, (int)sc_cmd->device->lun); if (!rdata || !kref_get_unless_zero(&rdata->kref)) { QEDF_ERR(NULL, "stale rport\n"); |