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authorIngo Molnar <mingo@kernel.org>2015-02-04 07:58:29 +0100
committerIngo Molnar <mingo@kernel.org>2015-02-04 07:58:29 +0100
commit8f4bf4bcc4d6f70a47baec5d73bd411e572842e0 (patch)
tree8ed86ebd19c32a629bfcfb43378bf32acd14c7d6 /kernel
parentMerge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/... (diff)
parentLinux 3.19-rc7 (diff)
downloadlinux-8f4bf4bcc4d6f70a47baec5d73bd411e572842e0.tar.xz
linux-8f4bf4bcc4d6f70a47baec5d73bd411e572842e0.zip
Merge tag 'v3.19-rc7' into perf/core, to merge fixes before applying new changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/bpf/syscall.c25
-rw-r--r--kernel/sched/core.c5
2 files changed, 19 insertions, 11 deletions
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 088ac0b1b106..536edc2be307 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -150,7 +150,7 @@ static int map_lookup_elem(union bpf_attr *attr)
int ufd = attr->map_fd;
struct fd f = fdget(ufd);
struct bpf_map *map;
- void *key, *value;
+ void *key, *value, *ptr;
int err;
if (CHECK_ATTR(BPF_MAP_LOOKUP_ELEM))
@@ -169,20 +169,29 @@ static int map_lookup_elem(union bpf_attr *attr)
if (copy_from_user(key, ukey, map->key_size) != 0)
goto free_key;
- err = -ENOENT;
- rcu_read_lock();
- value = map->ops->map_lookup_elem(map, key);
+ err = -ENOMEM;
+ value = kmalloc(map->value_size, GFP_USER);
if (!value)
- goto err_unlock;
+ goto free_key;
+
+ rcu_read_lock();
+ ptr = map->ops->map_lookup_elem(map, key);
+ if (ptr)
+ memcpy(value, ptr, map->value_size);
+ rcu_read_unlock();
+
+ err = -ENOENT;
+ if (!ptr)
+ goto free_value;
err = -EFAULT;
if (copy_to_user(uvalue, value, map->value_size) != 0)
- goto err_unlock;
+ goto free_value;
err = 0;
-err_unlock:
- rcu_read_unlock();
+free_value:
+ kfree(value);
free_key:
kfree(key);
err_put:
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index d22fb16a7153..ae1188f62693 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -7292,13 +7292,12 @@ void __might_sleep(const char *file, int line, int preempt_offset)
* since we will exit with TASK_RUNNING make sure we enter with it,
* otherwise we will destroy state.
*/
- if (WARN_ONCE(current->state != TASK_RUNNING,
+ WARN_ONCE(current->state != TASK_RUNNING && current->task_state_change,
"do not call blocking ops when !TASK_RUNNING; "
"state=%lx set at [<%p>] %pS\n",
current->state,
(void *)current->task_state_change,
- (void *)current->task_state_change))
- __set_current_state(TASK_RUNNING);
+ (void *)current->task_state_change);
___might_sleep(file, line, preempt_offset);
}