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Diffstat (limited to 'kernel/kprobes.c')
-rw-r--r--kernel/kprobes.c26
1 files changed, 13 insertions, 13 deletions
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 9437e14f36bd..9737a76e106f 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -1145,17 +1145,13 @@ int __kprobes register_kprobe(struct kprobe *p)
1145 if (ret) 1145 if (ret)
1146 return ret; 1146 return ret;
1147 1147
1148 preempt_disable();
1149 jump_label_lock(); 1148 jump_label_lock();
1149 preempt_disable();
1150 if (!kernel_text_address((unsigned long) p->addr) || 1150 if (!kernel_text_address((unsigned long) p->addr) ||
1151 in_kprobes_functions((unsigned long) p->addr) || 1151 in_kprobes_functions((unsigned long) p->addr) ||
1152 ftrace_text_reserved(p->addr, p->addr) || 1152 ftrace_text_reserved(p->addr, p->addr) ||
1153 jump_label_text_reserved(p->addr, p->addr)) { 1153 jump_label_text_reserved(p->addr, p->addr))
1154 preempt_enable(); 1154 goto fail_with_jump_label;
1155 jump_label_unlock();
1156 return -EINVAL;
1157 }
1158 jump_label_unlock();
1159 1155
1160 /* User can pass only KPROBE_FLAG_DISABLED to register_kprobe */ 1156 /* User can pass only KPROBE_FLAG_DISABLED to register_kprobe */
1161 p->flags &= KPROBE_FLAG_DISABLED; 1157 p->flags &= KPROBE_FLAG_DISABLED;
@@ -1169,10 +1165,9 @@ int __kprobes register_kprobe(struct kprobe *p)
1169 * We must hold a refcount of the probed module while updating 1165 * We must hold a refcount of the probed module while updating
1170 * its code to prohibit unexpected unloading. 1166 * its code to prohibit unexpected unloading.
1171 */ 1167 */
1172 if (unlikely(!try_module_get(probed_mod))) { 1168 if (unlikely(!try_module_get(probed_mod)))
1173 preempt_enable(); 1169 goto fail_with_jump_label;
1174 return -EINVAL; 1170
1175 }
1176 /* 1171 /*
1177 * If the module freed .init.text, we couldn't insert 1172 * If the module freed .init.text, we couldn't insert
1178 * kprobes in there. 1173 * kprobes in there.
@@ -1180,11 +1175,11 @@ int __kprobes register_kprobe(struct kprobe *p)
1180 if (within_module_init((unsigned long)p->addr, probed_mod) && 1175 if (within_module_init((unsigned long)p->addr, probed_mod) &&
1181 probed_mod->state != MODULE_STATE_COMING) { 1176 probed_mod->state != MODULE_STATE_COMING) {
1182 module_put(probed_mod); 1177 module_put(probed_mod);
1183 preempt_enable(); 1178 goto fail_with_jump_label;
1184 return -EINVAL;
1185 } 1179 }
1186 } 1180 }
1187 preempt_enable(); 1181 preempt_enable();
1182 jump_label_unlock();
1188 1183
1189 p->nmissed = 0; 1184 p->nmissed = 0;
1190 INIT_LIST_HEAD(&p->list); 1185 INIT_LIST_HEAD(&p->list);
@@ -1226,6 +1221,11 @@ out:
1226 module_put(probed_mod); 1221 module_put(probed_mod);
1227 1222
1228 return ret; 1223 return ret;
1224
1225fail_with_jump_label:
1226 preempt_enable();
1227 jump_label_unlock();
1228 return -EINVAL;
1229} 1229}
1230EXPORT_SYMBOL_GPL(register_kprobe); 1230EXPORT_SYMBOL_GPL(register_kprobe);
1231 1231