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6d53a9fe5a
scsi_put_cdrom_generic_arg() is copying uninitialized stack memory to userspace, since the compiler may leave a 3-byte hole in the middle of `cgc32`. Fix it by adding a padding field to `struct compat_cdrom_generic_command`. Cc: stable@vger.kernel.org Fixes: f3ee6e63a9df ("compat_ioctl: move CDROM_SEND_PACKET handling into scsi") Suggested-by: Dan Carpenter <dan.carpenter@oracle.com> Suggested-by: Arnd Bergmann <arnd@arndb.de> Reported-by: syzbot+85433a479a646a064ab3@syzkaller.appspotmail.com Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>