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authorAl Viro <viro@zeniv.linux.org.uk>2020-04-23 06:20:52 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2020-05-29 18:05:54 +0300
commite6c0433e270ae96fb62fd30cf7c2c7bf57d5391f (patch)
treeaa74b98cdbafad36d7bb617f5a3bbf89406b2d01 /drivers/scsi
parentd2659e583eb32fddea4f27a346de84f88be6119f (diff)
downloadlinux-e6c0433e270ae96fb62fd30cf7c2c7bf57d5391f.tar.xz
lpfc_debugfs: get rid of pointless access_ok()
No, you do NOT need to "protect copy from user" that way. Incidentally, your userland ABI stinks. I understand that you wanted to accept "reset" and "reset\n" as equivalent, but I suspect that accepting "reset this, you !@^!@!" had been an accident. Nothing to do about that now - it is a userland ABI... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/lpfc/lpfc_debugfs.c12
1 files changed, 0 insertions, 12 deletions
diff --git a/drivers/scsi/lpfc/lpfc_debugfs.c b/drivers/scsi/lpfc/lpfc_debugfs.c
index 8a6e02aa553f..5a754fb5f854 100644
--- a/drivers/scsi/lpfc/lpfc_debugfs.c
+++ b/drivers/scsi/lpfc/lpfc_debugfs.c
@@ -2166,10 +2166,6 @@ lpfc_debugfs_lockstat_write(struct file *file, const char __user *buf,
char *pbuf;
int i;
- /* Protect copy from user */
- if (!access_ok(buf, nbytes))
- return -EFAULT;
-
memset(mybuf, 0, sizeof(mybuf));
if (copy_from_user(mybuf, buf, nbytes))
@@ -2621,10 +2617,6 @@ lpfc_debugfs_multixripools_write(struct file *file, const char __user *buf,
if (nbytes > 64)
nbytes = 64;
- /* Protect copy from user */
- if (!access_ok(buf, nbytes))
- return -EFAULT;
-
memset(mybuf, 0, sizeof(mybuf));
if (copy_from_user(mybuf, buf, nbytes))
@@ -2787,10 +2779,6 @@ lpfc_debugfs_scsistat_write(struct file *file, const char __user *buf,
char mybuf[6] = {0};
int i;
- /* Protect copy from user */
- if (!access_ok(buf, nbytes))
- return -EFAULT;
-
if (copy_from_user(mybuf, buf, (nbytes >= sizeof(mybuf)) ?
(sizeof(mybuf) - 1) : nbytes))
return -EFAULT;