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| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2017-06-01 00:43:49 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-06-01 22:10:44 +0300 |
| commit | 73d17701db503382eeed03afb3a6c39ec4d9a5c7 (patch) | |
| tree | 0387060b46a8f75a3701f8006588cb1295e0bff6 | |
| parent | ec2be6a98e50d3eb9f35f70aa51c5d2c23737c55 (diff) | |
| download | linux-73d17701db503382eeed03afb3a6c39ec4d9a5c7.tar.xz | |
cdrom: Check SCSI passthrough support before reading audio
The CDROMREADAUDIO ioctl uses SCSI passthrough when the .disk
pointer has been set in struct cdrom_device_info. Hence check
whether SCSI passthrough is supported before submitting a SCSI
command. Note: both the ide-cd and sr drivers set the disk
pointer in struct cdrom_device_info but neither the pcd nor
the gdrom driver sets that pointer.
References: commit 82ed4db499b8 ("block: split scsi_request out of struct request")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Omar Sandoval <osandov@fb.com>
Cc: linux-block@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | drivers/cdrom/cdrom.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c index 76c952fd9ab9..ff19cfc587f0 100644 --- a/drivers/cdrom/cdrom.c +++ b/drivers/cdrom/cdrom.c @@ -2178,6 +2178,12 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, if (!q) return -ENXIO; + if (!blk_queue_scsi_passthrough(q)) { + WARN_ONCE(true, + "Attempt read CDDA info through a non-SCSI queue\n"); + return -EINVAL; + } + cdi->last_sense = 0; while (nframes) { |