Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c
index 7ac035a..5495537 100644
--- a/drivers/pci/proc.c
+++ b/drivers/pci/proc.c
@@ -13,6 +13,7 @@
#include <linux/seq_file.h>
#include <linux/capability.h>
#include <linux/uaccess.h>
+#include <linux/security.h>
#include <asm/byteorder.h>
#include "pci.h"
@@ -52,7 +53,7 @@
nbytes = size - pos;
cnt = nbytes;
- if (!access_ok(VERIFY_WRITE, buf, cnt))
+ if (!access_ok(buf, cnt))
return -EINVAL;
pci_config_pm_runtime_get(dev);
@@ -115,7 +116,11 @@
struct pci_dev *dev = PDE_DATA(ino);
int pos = *ppos;
int size = dev->cfg_size;
- int cnt;
+ int cnt, ret;
+
+ ret = security_locked_down(LOCKDOWN_PCI_ACCESS);
+ if (ret)
+ return ret;
if (pos >= size)
return 0;
@@ -125,7 +130,7 @@
nbytes = size - pos;
cnt = nbytes;
- if (!access_ok(VERIFY_READ, buf, cnt))
+ if (!access_ok(buf, cnt))
return -EINVAL;
pci_config_pm_runtime_get(dev);
@@ -196,6 +201,10 @@
#endif /* HAVE_PCI_MMAP */
int ret = 0;
+ ret = security_locked_down(LOCKDOWN_PCI_ACCESS);
+ if (ret)
+ return ret;
+
switch (cmd) {
case PCIIOC_CONTROLLER:
ret = pci_domain_nr(dev->bus);
@@ -222,6 +231,7 @@
}
/* If arch decided it can't, fall through... */
#endif /* HAVE_PCI_MMAP */
+ /* fall through */
default:
ret = -EINVAL;
break;
@@ -237,7 +247,8 @@
struct pci_filp_private *fpriv = file->private_data;
int i, ret, write_combine = 0, res_bit = IORESOURCE_MEM;
- if (!capable(CAP_SYS_RAWIO))
+ if (!capable(CAP_SYS_RAWIO) ||
+ security_locked_down(LOCKDOWN_PCI_ACCESS))
return -EPERM;
if (fpriv->mmap_state == pci_mmap_io) {
@@ -376,7 +387,7 @@
}
seq_putc(m, '\t');
if (drv)
- seq_printf(m, "%s", drv->name);
+ seq_puts(m, drv->name);
seq_putc(m, '\n');
return 0;
}