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| author | Nigel Hislop <hislop_nigel@emc.com> | 2010-03-08 12:25:16 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-03-08 12:25:30 +0100 |
| commit | 52898025cf7d458d029c18773d0ef49b4789d829 (patch) | |
| tree | f7a7b99a6001d4edb625d669fc6d59073269bb82 | |
| parent | 91a970d9889c7d6f451ee91ed361d0f0119d3778 (diff) | |
| download | linux-52898025cf7d458d029c18773d0ef49b4789d829.tar.bz2 | |
[S390] dasd: security and PSF update patch for EMC CKD ioctl
Remove the PSF order/suborder check from the Symmetrix CKD dasd ioctl.
In exchange restrict the ioctl to CAP_SYS_ADMIN and CAP_SYS_RAWIO.
Signed-off-by: Nigel Hislop <hislop_nigel@emc.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | drivers/s390/block/dasd_eckd.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c index 1cca21aafaba..d7163f904f40 100644 --- a/drivers/s390/block/dasd_eckd.c +++ b/drivers/s390/block/dasd_eckd.c @@ -2839,8 +2839,13 @@ static int dasd_symm_io(struct dasd_device *device, void __user *argp) char *psf_data, *rssd_result; struct dasd_ccw_req *cqr; struct ccw1 *ccw; + char psf0, psf1; int rc; + if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) + return -EACCES; + psf0 = psf1 = 0; + /* Copy parms from caller */ rc = -EFAULT; if (copy_from_user(&usrparm, argp, sizeof(usrparm))) @@ -2869,12 +2874,8 @@ static int dasd_symm_io(struct dasd_device *device, void __user *argp) (void __user *)(unsigned long) usrparm.psf_data, usrparm.psf_data_len)) goto out_free; - - /* sanity check on syscall header */ - if (psf_data[0] != 0x17 && psf_data[1] != 0xce) { - rc = -EINVAL; - goto out_free; - } + psf0 = psf_data[0]; + psf1 = psf_data[1]; /* setup CCWs for PSF + RSSD */ cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device); @@ -2925,7 +2926,9 @@ out_free: kfree(rssd_result); kfree(psf_data); out: - DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc); + DBF_DEV_EVENT(DBF_WARNING, device, + "Symmetrix ioctl (0x%02x 0x%02x): rc=%d", + (int) psf0, (int) psf1, rc); return rc; } |