In the function prot_verify_write(), the kmap address 'daddr' is incremented in the loop for each data page. Finally 'daddr' reaches the next page boundary in the end of the loop, and the invalid address is passed to kunmap_atomic().
Fix it by passing original value to kunmap_atomic(). Signed-off-by: Akinobu Mita <[email protected]> Cc: "James E.J. Bottomley" <[email protected]> Cc: Douglas Gilbert <[email protected]> Cc: "Martin K. Petersen" <[email protected]> Cc: [email protected] Acked-by: Douglas Gilbert <[email protected]> --- * New patch from v2 - Splitted from the patch "fix data integrity support on highmem machine" in v1 drivers/scsi/scsi_debug.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 0a537a0..caf6a94 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -1981,7 +1981,7 @@ static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec, ppage_offset += sizeof(struct sd_dif_tuple); } - kunmap_atomic(daddr); + kunmap_atomic(daddr - dsgl->length); } kunmap_atomic(paddr); -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
