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authorLinus Torvalds <torvalds@linux-foundation.org>2020-06-01 16:09:43 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-01 16:09:43 -0700
commite0cd9206878a3b95024602b355b254d142f5ce94 (patch)
treec33542ba74e86ced56383c783e32d3a160dd2ce1 /drivers/crypto/ccp/sev-dev.c
parent4b01285e1672ed9342ace952e92eb1e1db7134ae (diff)
parent87c233b8158a20a9c9ab1da96cb5cb1734d9006e (diff)
downloadlinux-sh-e0cd9206878a3b95024602b355b254d142f5ce94.tar.gz
Merge branch 'uaccess.access_ok' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull uaccess/access_ok updates from Al Viro: "Removals of trivially pointless access_ok() calls. Note: the fiemap stuff was removed from the series, since they are duplicates with part of ext4 series carried in Ted's tree" * 'uaccess.access_ok' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: vmci_host: get rid of pointless access_ok() hfi1: get rid of pointless access_ok() usb: get rid of pointless access_ok() calls lpfc_debugfs: get rid of pointless access_ok() efi_test: get rid of pointless access_ok() drm_read(): get rid of pointless access_ok() via-pmu: don't bother with access_ok() drivers/crypto/ccp/sev-dev.c: get rid of pointless access_ok() omapfb: get rid of pointless access_ok() calls amifb: get rid of pointless access_ok() calls drivers/fpga/dfl-afu-dma-region.c: get rid of pointless access_ok() drivers/fpga/dfl-fme-pr.c: get rid of pointless access_ok() cm4000_cs.c cmm_ioctl(): get rid of pointless access_ok() nvram: drop useless access_ok() n_hdlc_tty_read(): remove pointless access_ok() tomoyo_write_control(): get rid of pointless access_ok() btrfs_ioctl_send(): don't bother with access_ok() fat_dir_ioctl(): hadn't needed that access_ok() for more than a decade... dlmfs_file_write(): get rid of pointless access_ok()
Diffstat (limited to 'drivers/crypto/ccp/sev-dev.c')
-rw-r--r--drivers/crypto/ccp/sev-dev.c15
1 files changed, 3 insertions, 12 deletions
diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
index 439cd737076e..a2426334be61 100644
--- a/drivers/crypto/ccp/sev-dev.c
+++ b/drivers/crypto/ccp/sev-dev.c
@@ -394,8 +394,7 @@ static int sev_ioctl_do_pek_csr(struct sev_issue_cmd *argp, bool writable)
goto cmd;
/* allocate a physically contiguous buffer to store the CSR blob */
- if (!access_ok(input.address, input.length) ||
- input.length > SEV_FW_BLOB_MAX_SIZE) {
+ if (input.length > SEV_FW_BLOB_MAX_SIZE) {
ret = -EFAULT;
goto e_free;
}
@@ -632,12 +631,6 @@ static int sev_ioctl_do_get_id2(struct sev_issue_cmd *argp)
if (copy_from_user(&input, (void __user *)argp->data, sizeof(input)))
return -EFAULT;
- /* Check if we have write access to the userspace buffer */
- if (input.address &&
- input.length &&
- !access_ok(input.address, input.length))
- return -EFAULT;
-
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
@@ -753,15 +746,13 @@ static int sev_ioctl_do_pdh_export(struct sev_issue_cmd *argp, bool writable)
goto cmd;
/* Allocate a physically contiguous buffer to store the PDH blob. */
- if ((input.pdh_cert_len > SEV_FW_BLOB_MAX_SIZE) ||
- !access_ok(input.pdh_cert_address, input.pdh_cert_len)) {
+ if (input.pdh_cert_len > SEV_FW_BLOB_MAX_SIZE) {
ret = -EFAULT;
goto e_free;
}
/* Allocate a physically contiguous buffer to store the cert chain blob. */
- if ((input.cert_chain_len > SEV_FW_BLOB_MAX_SIZE) ||
- !access_ok(input.cert_chain_address, input.cert_chain_len)) {
+ if (input.cert_chain_len > SEV_FW_BLOB_MAX_SIZE) {
ret = -EFAULT;
goto e_free;
}