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| author |   Ingo Molnar <mingo@kernel.org> | 2015-02-04 07:58:29 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-02-04 07:58:29 +0100 |
| commit | 8f4bf4bcc4d6f70a47baec5d73bd411e572842e0 (patch) | |
| tree | 8ed86ebd19c32a629bfcfb43378bf32acd14c7d6 /kernel | |
| parent | Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core (diff) | |
| parent | Linux 3.19-rc7 (diff) | |
| download | linux-dev-8f4bf4bcc4d6f70a47baec5d73bd411e572842e0.tar.xz linux-dev-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.c | 25 | ||||
| -rw-r--r-- | kernel/sched/core.c | 5 |
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); } |