From 66478673825757e8ef8ab3d1ceaa4115274d1b57 Mon Sep 17 00:00:00 2001 From: Mark Lord Date: Wed, 28 Mar 2007 18:35:21 -0400 Subject: [PATCH] libata bugfix: HDIO_DRIVE_TASK libata bugfix: HDIO_DRIVE_TASK I was trying to use HDIO_DRIVE_TASK for something today, and discovered that the libata implementation does not copy over the upper four LBA bits from args[6]. This is serious, as any tools using this ioctl would have their commands applied to the wrong sectors on the drive, possibly resulting in disk corruption. Ideally, newer apps should use SG_IO/ATA_16 directly, avoiding this bug. But with libata poised to displace drivers/ide, better compatibility here is a must. This patch fixes libata to use the upper four LBA bits passed in from the ioctl. The original drivers/ide implementation copies over all bits except for the master/slave select bit. With this patch, libata will copy only the four high-order LBA bits, just in case there are assumptions elsewhere in libata (?). Signed-off-by: Mark Lord Cc: Chuck Ebbert Signed-off-by: Jeff Garzik Signed-off-by: Greg Kroah-Hartman --- drivers/ata/libata-scsi.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 73902d335767..17905424eb08 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -295,6 +295,7 @@ int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg) scsi_cmd[8] = args[3]; scsi_cmd[10] = args[4]; scsi_cmd[12] = args[5]; + scsi_cmd[13] = args[6] & 0x0f; scsi_cmd[14] = args[0]; /* Good values for timeout and retries? Values below -- 2.39.5