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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()
This commit is contained in:
Linus Torvalds 2020-06-01 16:09:43 -07:00
parent 4b01285e16 87c233b815
commit e0cd920687
21 changed files with 3 additions and 123 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/char/nvram.c
View File

@ -232,8 +232,6 @@ static ssize_t nvram_misc_read(struct file *file, char __user *buf,
ssize_t ret;
if (!access_ok(buf, count))
return -EFAULT;
if (*ppos >= nvram_size)
return 0;
@ -264,8 +262,6 @@ static ssize_t nvram_misc_write(struct file *file, const char __user *buf,
char *tmp;
ssize_t ret;
if (!access_ok(buf, count))
return -EFAULT;
if (*ppos >= nvram_size)
return 0;

14
drivers/char/pcmcia/cm4000_cs.c
View File

@ -1404,7 +1404,6 @@ static long cmm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
unsigned int iobase = dev->p_dev->resource[0]->start;
struct inode *inode = file_inode(filp);
struct pcmcia_device *link;
int size;
int rc;
void __user *argp = (void __user *)arg;
#ifdef CM4000_DEBUG
@ -1441,19 +1440,6 @@ static long cmm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
DEBUGP(4, dev, "iocnr mismatch\n");
goto out;
}
size = _IOC_SIZE(cmd);
rc = -EFAULT;
DEBUGP(4, dev, "iocdir=%.4x iocr=%.4x iocw=%.4x iocsize=%d cmd=%.4x\n",
_IOC_DIR(cmd), _IOC_READ, _IOC_WRITE, size, cmd);
if (_IOC_DIR(cmd) & _IOC_READ) {
if (!access_ok(argp, size))
goto out;
}
if (_IOC_DIR(cmd) & _IOC_WRITE) {
if (!access_ok(argp, size))
goto out;
}
rc = 0;
switch (cmd) {

15
drivers/crypto/ccp/sev-dev.c
View File

@ -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;
}

12
drivers/firmware/efi/test/efi_test.c
View File

@ -70,9 +70,6 @@ copy_ucs2_from_user_len(efi_char16_t **dst, efi_char16_t __user *src,
return 0;
}
if (!access_ok(src, 1))
return -EFAULT;
buf = memdup_user(src, len);
if (IS_ERR(buf)) {
*dst = NULL;
@ -91,9 +88,6 @@ copy_ucs2_from_user_len(efi_char16_t **dst, efi_char16_t __user *src,
static inline int
get_ucs2_strsize_from_user(efi_char16_t __user *src, size_t *len)
{
if (!access_ok(src, 1))
return -EFAULT;
*len = user_ucs2_strsize(src);
if (*len == 0)
return -EFAULT;
@ -118,9 +112,6 @@ copy_ucs2_from_user(efi_char16_t **dst, efi_char16_t __user *src)
{
size_t len;
if (!access_ok(src, 1))
return -EFAULT;
len = user_ucs2_strsize(src);
if (len == 0)
return -EFAULT;
@ -142,9 +133,6 @@ copy_ucs2_to_user_len(efi_char16_t __user *dst, efi_char16_t *src, size_t len)
if (!src)
return 0;
if (!access_ok(dst, 1))
return -EFAULT;
return copy_to_user(dst, src, len);
}

4
drivers/fpga/dfl-afu-dma-region.c
View File

@ -324,10 +324,6 @@ int afu_dma_map_region(struct dfl_feature_platform_data *pdata,
if (user_addr + length < user_addr)
return -EINVAL;
if (!access_ok((void __user *)(unsigned long)user_addr,
length))
return -EINVAL;
region = kzalloc(sizeof(*region), GFP_KERNEL);
if (!region)
return -ENOMEM;

4
drivers/fpga/dfl-fme-pr.c
View File

@ -97,10 +97,6 @@ static int fme_pr(struct platform_device *pdev, unsigned long arg)
return -EINVAL;
}
if (!access_ok((void __user *)(unsigned long)port_pr.buffer_address,
port_pr.buffer_size))
return -EFAULT;
/*
* align PR buffer per PR bandwidth, as HW ignores the extra padding
* data automatically.

3
drivers/gpu/drm/drm_file.c
View File

@ -569,9 +569,6 @@ ssize_t drm_read(struct file *filp, char __user *buffer,
struct drm_device *dev = file_priv->minor->dev;
ssize_t ret;
if (!access_ok(buffer, count))
return -EFAULT;
ret = mutex_lock_interruptible(&file_priv->event_read_lock);
if (ret)
return ret;

7
drivers/infiniband/hw/hfi1/user_exp_rcv.c
View File

@ -206,13 +206,6 @@ static int pin_rcv_pages(struct hfi1_filedata *fd, struct tid_user_buf *tidbuf)
return -EINVAL;
}
/* Verify that access is OK for the user buffer */
if (!access_ok((void __user *)vaddr,
npages * PAGE_SIZE)) {
dd_dev_err(dd, "Fail vaddr %p, %u pages, !access_ok\n",
(void *)vaddr, npages);
return -EFAULT;
}
/* Allocate the array of struct page pointers needed for pinning */
pages = kcalloc(npages, sizeof(*pages), GFP_KERNEL);
if (!pages)

2
drivers/macintosh/via-pmu.c
View File

@ -2184,8 +2184,6 @@ pmu_read(struct file *file, char __user *buf,
if (count < 1 || !pp)
return -EINVAL;
if (!access_ok(buf, count))
return -EFAULT;
spin_lock_irqsave(&pp->lock, flags);
add_wait_queue(&pp->wait, &wait);

2
drivers/misc/vmw_vmci/vmci_host.c
View File

@ -233,8 +233,6 @@ static int vmci_host_setup_notify(struct vmci_ctx *context,
* about the size.
*/
BUILD_BUG_ON(sizeof(bool) != sizeof(u8));
if (!access_ok((void __user *)uva, sizeof(u8)))
return VMCI_ERROR_GENERIC;
/*
* Lock physical page backing a given user VA.

12
drivers/scsi/lpfc/lpfc_debugfs.c
View File

@ -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;

7
drivers/tty/n_hdlc.c
View File

@ -423,13 +423,6 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
struct n_hdlc_buf *rbuf;
DECLARE_WAITQUEUE(wait, current);
/* verify user access to buffer */
if (!access_ok(buf, nr)) {
pr_warn("%s(%d) %s() can't verify user buffer\n",
__FILE__, __LINE__, __func__);
return -EFAULT;
}
add_wait_queue(&tty->read_wait, &wait);
for (;;) {

2
drivers/usb/core/devices.c
View File

@ -598,8 +598,6 @@ static ssize_t usb_device_read(struct file *file, char __user *buf,
return -EINVAL;
if (nbytes <= 0)
return 0;
if (!access_ok(buf, nbytes))
return -EFAULT;
mutex_lock(&usb_bus_idr_lock);
/* print devices for all busses */

9
drivers/usb/core/devio.c
View File

@ -1136,11 +1136,6 @@ static int proc_control(struct usb_dev_state *ps, void __user *arg)
ctrl.bRequestType, ctrl.bRequest, ctrl.wValue,
ctrl.wIndex, ctrl.wLength);
if (ctrl.bRequestType & 0x80) {
if (ctrl.wLength && !access_ok(ctrl.data,
ctrl.wLength)) {
ret = -EINVAL;
goto done;
}
pipe = usb_rcvctrlpipe(dev, 0);
snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0);
@ -1225,10 +1220,6 @@ static int proc_bulk(struct usb_dev_state *ps, void __user *arg)
}
tmo = bulk.timeout;
if (bulk.ep & 0x80) {
if (len1 && !access_ok(bulk.data, len1)) {
ret = -EINVAL;
goto done;
}
snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0);
usb_unlock_device(dev);

6
drivers/usb/gadget/function/f_hid.c
View File

@ -252,9 +252,6 @@ static ssize_t f_hidg_read(struct file *file, char __user *buffer,
if (!count)
return 0;
if (!access_ok(buffer, count))
return -EFAULT;
spin_lock_irqsave(&hidg->read_spinlock, flags);
#define READ_COND (!list_empty(&hidg->completed_out_req))
@ -339,9 +336,6 @@ static ssize_t f_hidg_write(struct file *file, const char __user *buffer,
unsigned long flags;
ssize_t status = -ENOMEM;
if (!access_ok(buffer, count))
return -EFAULT;
spin_lock_irqsave(&hidg->write_spinlock, flags);
#define WRITE_COND (!hidg->write_pending)

4
drivers/video/fbdev/amifb.c
View File

@ -1855,8 +1855,6 @@ static int ami_get_var_cursorinfo(struct fb_var_cursorinfo *var,
var->yspot = par->crsr.spot_y;
if (size > var->height * var->width)
return -ENAMETOOLONG;
if (!access_ok(data, size))
return -EFAULT;
delta = 1 << par->crsr.fmode;
lspr = lofsprite + (delta << 1);
if (par->bplcon0 & BPC0_LACE)
@ -1935,8 +1933,6 @@ static int ami_set_var_cursorinfo(struct fb_var_cursorinfo *var,
return -EINVAL;
if (!var->height)
return -EINVAL;
if (!access_ok(data, var->width * var->height))
return -EFAULT;
delta = 1 << fmode;
lofsprite = shfsprite = (u_short *)spritememory;
lspr = lofsprite + (delta << 1);

3
drivers/video/fbdev/omap2/omapfb/omapfb-ioctl.c
View File

@ -482,9 +482,6 @@ static int omapfb_memory_read(struct fb_info *fbi,
if (!display || !display->driver->memory_read)
return -ENOENT;
if (!access_ok(mr->buffer, mr->buffer_size))
return -EFAULT;
if (mr->w > 4096 || mr->h > 4096)
return -EINVAL;

7
fs/btrfs/send.c
View File

@ -7065,13 +7065,6 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
goto out;
}
if (!access_ok(arg->clone_sources,
sizeof(*arg->clone_sources) *
arg->clone_sources_count)) {
ret = -EFAULT;
goto out;
}
if (arg->flags & ~BTRFS_SEND_FLAG_MASK) {
ret = -EINVAL;
goto out;

4
fs/fat/dir.c
View File

@ -804,8 +804,6 @@ static long fat_dir_ioctl(struct file *filp, unsigned int cmd,
return fat_generic_ioctl(filp, cmd, arg);
}
if (!access_ok(d1, sizeof(struct __fat_dirent[2])))
return -EFAULT;
/*
* Yes, we don't need this put_user() absolutely. However old
* code didn't return the right value. So, app use this value,
@ -844,8 +842,6 @@ static long fat_compat_dir_ioctl(struct file *filp, unsigned cmd,
return fat_generic_ioctl(filp, cmd, (unsigned long)arg);
}
if (!access_ok(d1, sizeof(struct compat_dirent[2])))
return -EFAULT;
/*
* Yes, we don't need this put_user() absolutely. However old
* code didn't return the right value. So, app use this value,

3
fs/ocfs2/dlmfs/dlmfs.c
View File

@ -291,9 +291,6 @@ static ssize_t dlmfs_file_write(struct file *filp,
if (!count)
return 0;
if (!access_ok(buf, count))
return -EFAULT;
lvb_buf = kmalloc(count, GFP_NOFS);
if (!lvb_buf)
return -ENOMEM;

2
security/tomoyo/common.c
View File

@ -2662,8 +2662,6 @@ ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
if (!head->write)
return -EINVAL;
if (!access_ok(buffer, buffer_len))
return -EFAULT;
if (mutex_lock_interruptible(&head->io_sem))
return -EINTR;
head->read_user_buf_avail = 0;