diff options
Diffstat (limited to 'drivers/cdrom')
| -rw-r--r-- | drivers/cdrom/cdrom.c | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c index eebdcbef0578..48095025e588 100644 --- a/drivers/cdrom/cdrom.c +++ b/drivers/cdrom/cdrom.c @@ -3017,9 +3017,31 @@ static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi, struct cdrom_read_audio ra; int lba; - if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg, - sizeof(ra))) - return -EFAULT; +#ifdef CONFIG_COMPAT + if (in_compat_syscall()) { + struct compat_cdrom_read_audio { + union cdrom_addr addr; + u8 addr_format; + compat_int_t nframes; + compat_caddr_t buf; + } ra32; + + if (copy_from_user(&ra32, arg, sizeof(ra32))) + return -EFAULT; + + ra = (struct cdrom_read_audio) { + .addr = ra32.addr, + .addr_format = ra32.addr_format, + .nframes = ra32.nframes, + .buf = compat_ptr(ra32.buf), + }; + } else +#endif + { + if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg, + sizeof(ra))) + return -EFAULT; + } if (ra.addr_format == CDROM_MSF) lba = msf_to_lba(ra.addr.msf.minute, |