[PATCH 00/19] Kernel subsystem refcounter conversions

Now when new refcount_t type and API are finally merged (see include/linux/refcount.h), the following patches convert various refcounters in the kernel susystem from atomic_t to refcount_t. By doing this we prevent intentional or accidental underflows or overflows that can led to use-after-free vulnerabilities. The below patches are fully independent and can be cherry-picked separately. Since we convert all kernel subsystems in the same fashion, resulting in about 300 patches, we have to group them for sending at least in some fashion to be manageable. Please excuse the long cc list. Elena Reshetova (19): kernel: convert sighand_struct.count from atomic_t to refcount_t kernel: convert signal_struct.sigcnt from atomic_t to refcount_t kernel: convert user_struct.__count from atomic_t to refcount_t kernel: convert task_struct.usage from atomic_t to refcount_t kernel: convert task_struct.stack_refcount from atomic_t to refcount_t kernel: convert perf_event_context.refcount from atomic_t to refcount_t kernel: convert ring_buffer.refcount from atomic_t to refcount_t kernel: convert ring_buffer.aux_refcount from atomic_t to refcount_t kernel: convert uprobe.ref from atomic_t to refcount_t kernel: convert nsproxy.count from atomic_t to refcount_t kernel: convert cgroup_namespace.count from atomic_t to refcount_t kernel: convert css_set.refcount from atomic_t to refcount_t kernel: convert group_info.usage from atomic_t to refcount_t kernel: convert cred.usage from atomic_t to refcount_t kernel: convert audit_tree.count from atomic_t to refcount_t kernel: convert audit_watch.count from atomic_t to refcount_t kernel: convert numa_group.refcount from atomic_t to refcount_t kernel: convert futex_pi_state.refcount from atomic_t to refcount_t kernel: convert kcov.refcount from atomic_t to refcount_t fs/exec.c | 4 ++-- include/linux/cgroup-defs.h | 3 ++- include/linux/cgroup.h | 7 ++++--- include/linux/cred.h | 13 ++++++------ include/linux/init_task.h | 7 ++++--- include/linux/nsproxy.h | 6 +++--- include/linux/perf_event.h | 3 ++- include/linux/sched.h | 19 +++++++++-------- kernel/audit_tree.c | 8 +++---- kernel/audit_watch.c | 8 +++---- kernel/cgroup/cgroup-internal.h | 10 ++++++--- kernel/cgroup/cgroup-v1.c | 4 ++-- kernel/cgroup/cgroup.c | 10 ++++----- kernel/cgroup/namespace.c | 2 +- kernel/cred.c | 46 ++++++++++++++++++++--------------------- kernel/events/core.c | 18 ++++++++-------- kernel/events/internal.h | 5 +++-- kernel/events/ring_buffer.c | 8 +++---- kernel/events/uprobes.c | 8 +++---- kernel/fork.c | 24 ++++++++++----------- kernel/futex.c | 15 +++++++------- kernel/groups.c | 2 +- kernel/kcov.c | 9 ++++---- kernel/nsproxy.c | 6 +++--- kernel/sched/fair.c | 8 +++---- kernel/user.c | 8 +++---- 26 files changed, 137 insertions(+), 124 deletions(-) -- 2.7.4