From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 18 Apr 2018 09:51:31 +0000 (+0300)
Subject: cdrom: information leak in cdrom_ioctl_media_changed()
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=15bad6c8291a04692b928e9037844fde6f32a798;p=pandora-kernel.git

cdrom: information leak in cdrom_ioctl_media_changed()

commit 9de4ee40547fd315d4a0ed1dd15a2fa3559ad707 upstream.

This cast is wrong.  "cdi->capacity" is an int and "arg" is an unsigned
long.  The way the check is written now, if one of the high 32 bits is
set then we could read outside the info->slots[] array.

This bug is pretty old and it predates git.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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