> -----Original Message----- > From: walter harms [mailto:wharms@xxxxxx] > Sent: Thursday, June 04, 2015 10:23 AM > To: Dan Carpenter > Cc: Don Brace; James E.J. Bottomley; iss_storagedev@xxxxxx; dl Team ESD > Storage Dev Support; linux-scsi@xxxxxxxxxxxxxxx; kernel- > janitors@xxxxxxxxxxxxxxx > Subject: Re: [patch] hpsa: fix an sprintf() overflow in the reset handler > > > > Am 04.06.2015 16:47, schrieb Dan Carpenter: > > 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; > > } > > > there is something called dev_printk_emit() what seems the varg version of > dev_printk() > (what is behind psa_show_dev_msg()) maybe it would be better to redefine the > interface > to use varargs ? > > Its up to the maintainer to decide, i do not know how often > hpsa_show_dev_msg is actualy used. > > just my 2 cents, > wh > Thanks. I'll check into this and add it in as an update if necessary. -- 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
