Messages in this thread Patch in this message | | | Date | Fri, 30 Mar 2007 14:06:59 -0700 | From | Greg KH <> | Subject | [patch 34/37] libata bugfix: HDIO_DRIVE_TASK |
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-stable review patch. If anyone has any objections, please let us know.
------------------ From: Mark Lord <liml@rtr.ca>
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 <mlord@pobox.com> Cc: Chuck Ebbert <cebbert@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/ata/libata-scsi.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -295,6 +295,7 @@ int ata_task_ioctl(struct scsi_device *s 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 -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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