diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/cgroup.c | 4 | ||||
| -rw-r--r-- | kernel/kprobes.c | 52 | ||||
| -rw-r--r-- | kernel/marker.c | 9 | ||||
| -rw-r--r-- | kernel/res_counter.c | 1 |
4 files changed, 38 insertions, 28 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index d8abe996e009..e9c2fb01e89b 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -2232,7 +2232,6 @@ static long cgroup_create(struct cgroup *parent, struct dentry *dentry, mutex_lock(&cgroup_mutex); - cgrp->flags = 0; INIT_LIST_HEAD(&cgrp->sibling); INIT_LIST_HEAD(&cgrp->children); INIT_LIST_HEAD(&cgrp->css_sets); @@ -2242,6 +2241,9 @@ static long cgroup_create(struct cgroup *parent, struct dentry *dentry, cgrp->root = parent->root; cgrp->top_cgroup = parent->top_cgroup; + if (notify_on_release(parent)) + set_bit(CGRP_NOTIFY_ON_RELEASE, &cgrp->flags); + for_each_subsys(root, ss) { struct cgroup_subsys_state *css = ss->create(ss, cgrp); if (IS_ERR(css)) { diff --git a/kernel/kprobes.c b/kernel/kprobes.c index 7a86e6432338..fcfb580c3afc 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -498,27 +498,36 @@ static int __kprobes in_kprobes_functions(unsigned long addr) return 0; } +/* + * If we have a symbol_name argument, look it up and add the offset field + * to it. This way, we can specify a relative address to a symbol. + */ +static kprobe_opcode_t __kprobes *kprobe_addr(struct kprobe *p) +{ + kprobe_opcode_t *addr = p->addr; + if (p->symbol_name) { + if (addr) + return NULL; + kprobe_lookup_name(p->symbol_name, addr); + } + + if (!addr) + return NULL; + return (kprobe_opcode_t *)(((char *)addr) + p->offset); +} + static int __kprobes __register_kprobe(struct kprobe *p, unsigned long called_from) { int ret = 0; struct kprobe *old_p; struct module *probed_mod; + kprobe_opcode_t *addr; - /* - * If we have a symbol_name argument look it up, - * and add it to the address. That way the addr - * field can either be global or relative to a symbol. - */ - if (p->symbol_name) { - if (p->addr) - return -EINVAL; - kprobe_lookup_name(p->symbol_name, p->addr); - } - - if (!p->addr) + addr = kprobe_addr(p); + if (!addr) return -EINVAL; - p->addr = (kprobe_opcode_t *)(((char *)p->addr)+ p->offset); + p->addr = addr; if (!kernel_text_address((unsigned long) p->addr) || in_kprobes_functions((unsigned long) p->addr)) @@ -678,8 +687,7 @@ void __kprobes unregister_jprobe(struct jprobe *jp) unregister_kprobe(&jp->kp); } -#ifdef ARCH_SUPPORTS_KRETPROBES - +#ifdef CONFIG_KRETPROBES /* * This kprobe pre_handler is registered with every kretprobe. When probe * hits it will set up the return probe. @@ -722,12 +730,12 @@ int __kprobes register_kretprobe(struct kretprobe *rp) int ret = 0; struct kretprobe_instance *inst; int i; - void *addr = rp->kp.addr; + void *addr; if (kretprobe_blacklist_size) { - if (addr == NULL) - kprobe_lookup_name(rp->kp.symbol_name, addr); - addr += rp->kp.offset; + addr = kprobe_addr(&rp->kp); + if (!addr) + return -EINVAL; for (i = 0; kretprobe_blacklist[i].name != NULL; i++) { if (kretprobe_blacklist[i].addr == addr) @@ -769,8 +777,7 @@ int __kprobes register_kretprobe(struct kretprobe *rp) return ret; } -#else /* ARCH_SUPPORTS_KRETPROBES */ - +#else /* CONFIG_KRETPROBES */ int __kprobes register_kretprobe(struct kretprobe *rp) { return -ENOSYS; @@ -781,8 +788,7 @@ static int __kprobes pre_handler_kretprobe(struct kprobe *p, { return 0; } - -#endif /* ARCH_SUPPORTS_KRETPROBES */ +#endif /* CONFIG_KRETPROBES */ void __kprobes unregister_kretprobe(struct kretprobe *rp) { diff --git a/kernel/marker.c b/kernel/marker.c index 50effc01d9a2..48a4ea5afffd 100644 --- a/kernel/marker.c +++ b/kernel/marker.c @@ -698,14 +698,12 @@ int marker_probe_unregister(const char *name, { struct marker_entry *entry; struct marker_probe_closure *old; - int ret = 0; + int ret = -ENOENT; mutex_lock(&markers_mutex); entry = get_marker(name); - if (!entry) { - ret = -ENOENT; + if (!entry) goto end; - } if (entry->rcu_pending) rcu_barrier(); old = marker_entry_remove_probe(entry, probe, probe_private); @@ -713,12 +711,15 @@ int marker_probe_unregister(const char *name, marker_update_probes(); /* may update entry */ mutex_lock(&markers_mutex); entry = get_marker(name); + if (!entry) + goto end; entry->oldptr = old; entry->rcu_pending = 1; /* write rcu_pending before calling the RCU callback */ smp_wmb(); call_rcu(&entry->rcu, free_old_closure); remove_marker(name); /* Ignore busy error message */ + ret = 0; end: mutex_unlock(&markers_mutex); return ret; diff --git a/kernel/res_counter.c b/kernel/res_counter.c index 16cbec2d5d60..efbfc0fc232f 100644 --- a/kernel/res_counter.c +++ b/kernel/res_counter.c @@ -113,6 +113,7 @@ ssize_t res_counter_write(struct res_counter *counter, int member, ret = -EINVAL; + strstrip(buf); if (write_strategy) { if (write_strategy(buf, &tmp)) { goto out_free; |