Merge tag 'fsnotify_for_v5.7-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull fanotify FAN_DIR_MODIFY disabling from Jan Kara:
"A single patch that disables FAN_DIR_MODIFY support that was merged in
this merge window.
When discussing further functionality we realized it may be more
logical to guard it with a feature flag or to call things slightly
differently (or maybe not) so let's not set the API in stone for now."
* tag 'fsnotify_for_v5.7-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
fanotify: turn off support for FAN_DIR_MODIFY
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index 4a30498..c24cad3 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -1050,7 +1050,7 @@ void kfd_dec_compute_active(struct kfd_dev *dev);
/* Check with device cgroup if @kfd device is accessible */
static inline int kfd_devcgroup_check_permission(struct kfd_dev *kfd)
{
-#if defined(CONFIG_CGROUP_DEVICE)
+#if defined(CONFIG_CGROUP_DEVICE) || defined(CONFIG_CGROUP_BPF)
struct drm_device *ddev = kfd->ddev;
return devcgroup_check_permission(DEVCG_DEV_CHAR, ddev->driver->major,
diff --git a/fs/xattr.c b/fs/xattr.c
index e13265e..91608d9 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -876,6 +876,9 @@ int simple_xattr_set(struct simple_xattrs *xattrs, const char *name,
struct simple_xattr *new_xattr = NULL;
int err = 0;
+ if (removed_size)
+ *removed_size = -1;
+
/* value == NULL means remove */
if (value) {
new_xattr = simple_xattr_alloc(value, size);
@@ -914,9 +917,6 @@ int simple_xattr_set(struct simple_xattrs *xattrs, const char *name,
list_add(&new_xattr->list, &xattrs->head);
xattr = NULL;
}
-
- if (removed_size)
- *removed_size = -1;
out:
spin_unlock(&xattrs->lock);
if (xattr) {
diff --git a/include/linux/device_cgroup.h b/include/linux/device_cgroup.h
index fa35b52..9a72214 100644
--- a/include/linux/device_cgroup.h
+++ b/include/linux/device_cgroup.h
@@ -1,6 +1,5 @@
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/fs.h>
-#include <linux/bpf-cgroup.h>
#define DEVCG_ACC_MKNOD 1
#define DEVCG_ACC_READ 2
@@ -11,16 +10,10 @@
#define DEVCG_DEV_CHAR 2
#define DEVCG_DEV_ALL 4 /* this represents all devices */
-#ifdef CONFIG_CGROUP_DEVICE
-int devcgroup_check_permission(short type, u32 major, u32 minor,
- short access);
-#else
-static inline int devcgroup_check_permission(short type, u32 major, u32 minor,
- short access)
-{ return 0; }
-#endif
#if defined(CONFIG_CGROUP_DEVICE) || defined(CONFIG_CGROUP_BPF)
+int devcgroup_check_permission(short type, u32 major, u32 minor,
+ short access);
static inline int devcgroup_inode_permission(struct inode *inode, int mask)
{
short type, access = 0;
@@ -61,6 +54,9 @@ static inline int devcgroup_inode_mknod(int mode, dev_t dev)
}
#else
+static inline int devcgroup_check_permission(short type, u32 major, u32 minor,
+ short access)
+{ return 0; }
static inline int devcgroup_inode_permission(struct inode *inode, int mask)
{ return 0; }
static inline int devcgroup_inode_mknod(int mode, dev_t dev)
diff --git a/kernel/cgroup/rstat.c b/kernel/cgroup/rstat.c
index 6f87352..41ca996 100644
--- a/kernel/cgroup/rstat.c
+++ b/kernel/cgroup/rstat.c
@@ -33,12 +33,9 @@ void cgroup_rstat_updated(struct cgroup *cgrp, int cpu)
return;
/*
- * Paired with the one in cgroup_rstat_cpu_pop_updated(). Either we
- * see NULL updated_next or they see our updated stat.
- */
- smp_mb();
-
- /*
+ * Speculative already-on-list test. This may race leading to
+ * temporary inaccuracies, which is fine.
+ *
* Because @parent's updated_children is terminated with @parent
* instead of NULL, we can tell whether @cgrp is on the list by
* testing the next pointer for NULL.
@@ -134,13 +131,6 @@ static struct cgroup *cgroup_rstat_cpu_pop_updated(struct cgroup *pos,
*nextp = rstatc->updated_next;
rstatc->updated_next = NULL;
- /*
- * Paired with the one in cgroup_rstat_cpu_updated().
- * Either they see NULL updated_next or we see their
- * updated stat.
- */
- smp_mb();
-
return pos;
}
diff --git a/security/Makefile b/security/Makefile
index 22e73a3..3baf435 100644
--- a/security/Makefile
+++ b/security/Makefile
@@ -30,7 +30,7 @@
obj-$(CONFIG_SECURITY_LOADPIN) += loadpin/
obj-$(CONFIG_SECURITY_SAFESETID) += safesetid/
obj-$(CONFIG_SECURITY_LOCKDOWN_LSM) += lockdown/
-obj-$(CONFIG_CGROUP_DEVICE) += device_cgroup.o
+obj-$(CONFIG_CGROUPS) += device_cgroup.o
obj-$(CONFIG_BPF_LSM) += bpf/
# Object integrity file lists
diff --git a/security/commoncap.c b/security/commoncap.c
index f4ee0ae..0ca31c8 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -812,6 +812,7 @@ int cap_bprm_set_creds(struct linux_binprm *bprm)
int ret;
kuid_t root_uid;
+ new->cap_ambient = old->cap_ambient;
if (WARN_ON(!cap_ambient_invariant_ok(old)))
return -EPERM;
diff --git a/security/device_cgroup.c b/security/device_cgroup.c
index 7d0f8f7..43ab0ad4 100644
--- a/security/device_cgroup.c
+++ b/security/device_cgroup.c
@@ -15,6 +15,8 @@
#include <linux/rcupdate.h>
#include <linux/mutex.h>
+#ifdef CONFIG_CGROUP_DEVICE
+
static DEFINE_MUTEX(devcgroup_mutex);
enum devcg_behavior {
@@ -792,7 +794,7 @@ struct cgroup_subsys devices_cgrp_subsys = {
};
/**
- * __devcgroup_check_permission - checks if an inode operation is permitted
+ * devcgroup_legacy_check_permission - checks if an inode operation is permitted
* @dev_cgroup: the dev cgroup to be tested against
* @type: device type
* @major: device major number
@@ -801,7 +803,7 @@ struct cgroup_subsys devices_cgrp_subsys = {
*
* returns 0 on success, -EPERM case the operation is not permitted
*/
-static int __devcgroup_check_permission(short type, u32 major, u32 minor,
+static int devcgroup_legacy_check_permission(short type, u32 major, u32 minor,
short access)
{
struct dev_cgroup *dev_cgroup;
@@ -825,6 +827,10 @@ static int __devcgroup_check_permission(short type, u32 major, u32 minor,
return 0;
}
+#endif /* CONFIG_CGROUP_DEVICE */
+
+#if defined(CONFIG_CGROUP_DEVICE) || defined(CONFIG_CGROUP_BPF)
+
int devcgroup_check_permission(short type, u32 major, u32 minor, short access)
{
int rc = BPF_CGROUP_RUN_PROG_DEVICE_CGROUP(type, major, minor, access);
@@ -832,6 +838,13 @@ int devcgroup_check_permission(short type, u32 major, u32 minor, short access)
if (rc)
return -EPERM;
- return __devcgroup_check_permission(type, major, minor, access);
+ #ifdef CONFIG_CGROUP_DEVICE
+ return devcgroup_legacy_check_permission(type, major, minor, access);
+
+ #else /* CONFIG_CGROUP_DEVICE */
+ return 0;
+
+ #endif /* CONFIG_CGROUP_DEVICE */
}
EXPORT_SYMBOL(devcgroup_check_permission);
+#endif /* defined(CONFIG_CGROUP_DEVICE) || defined(CONFIG_CGROUP_BPF) */
