> -----Original Message----- > From: Dan Carpenter [mailto:dan.carpenter@xxxxxxxxxx] > Sent: Thursday, June 04, 2015 9:48 AM > To: Don Brace > Cc: James E.J. Bottomley; iss_storagedev@xxxxxx; dl Team ESD Storage Dev > Support; linux-scsi@xxxxxxxxxxxxxxx; kernel-janitors@xxxxxxxxxxxxxxx > Subject: [patch] hpsa: fix an sprintf() overflow in the reset handler > > The string "cmd %d RESET FAILED, new lockup detected" is not quite > large enough so the sprintf() will overflow. I have increased the size > of the buffer and also changed the sprintf calls to snprintf. > > Fixes: 73153fe533bc ('hpsa: use block layer tag for command allocation') > Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> > > diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c > index 1dafeb4..cab4e98 100644 > --- a/drivers/scsi/hpsa.c > +++ b/drivers/scsi/hpsa.c > @@ -5104,7 +5104,7 @@ static int hpsa_eh_device_reset_handler(struct > scsi_cmnd *scsicmd) > int rc; > struct ctlr_info *h; > struct hpsa_scsi_dev_t *dev; > - char msg[40]; > + char msg[48]; > > /* find the controller to which the command to be aborted was sent */ > h = sdev_to_hba(scsicmd->device); > @@ -5122,16 +5122,18 @@ static int hpsa_eh_device_reset_handler(struct > scsi_cmnd *scsicmd) > > /* if controller locked up, we can guarantee command won't complete > */ > if (lockup_detected(h)) { > - sprintf(msg, "cmd %d RESET FAILED, lockup detected", > - hpsa_get_cmd_index(scsicmd)); > + snprintf(msg, sizeof(msg), > + "cmd %d RESET FAILED, lockup detected", > + hpsa_get_cmd_index(scsicmd)); > hpsa_show_dev_msg(KERN_WARNING, h, dev, msg); > return FAILED; > } > > /* this reset request might be the result of a lockup; check */ > if (detect_controller_lockup(h)) { > - sprintf(msg, "cmd %d RESET FAILED, new lockup detected", > - hpsa_get_cmd_index(scsicmd)); > + snprintf(msg, sizeof(msg), > + "cmd %d RESET FAILED, new lockup detected", > + hpsa_get_cmd_index(scsicmd)); > hpsa_show_dev_msg(KERN_WARNING, h, dev, msg); > return FAILED; > } > @@ -5145,7 +5147,8 @@ static int hpsa_eh_device_reset_handler(struct > scsi_cmnd *scsicmd) > /* send a reset to the SCSI LUN which the command was sent to */ > rc = hpsa_do_reset(h, dev, dev->scsi3addr, HPSA_RESET_TYPE_LUN, > DEFAULT_REPLY_QUEUE); > - sprintf(msg, "reset %s", rc == 0 ? "completed successfully" : "failed"); > + snprintf(msg, sizeof(msg), "reset %s", > + rc == 0 ? "completed successfully" : "failed"); > hpsa_show_dev_msg(KERN_WARNING, h, dev, msg); > return rc == 0 ? SUCCESS : FAILED; > } Signed-off-by: Don Brace <don.brace@xxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
