Note: this is just a fresh rebase on top of linux-next.
No functional changes.
Changes in v5:
* Kees catched that the following changes in
perf_event_context.refcount and futex_pi_state.refcount
are not correct now when ARCH_HAS_REFCOUNT is enabled:
- WARN_ON(!atomic_inc_not_zero(refcount));
+ refcount_inc(refcount);
So they are now changed back to using refcount_inc_not_zero.
Changes in v4:
* just rebase and corrections on linux-next/master
Changes in v3:
* SoB chain corrected
* minor corrections based on v2 feedback
* rebase on linux-next/master as of today
Changes in v2:
* dropped already merged patches
* rebase on top of linux-next/master
* Now by default refcount_t = atomic_t (*) and uses all atomic
standard operations unless CONFIG_REFCOUNT_FULL is enabled.
This is a compromise for the systems that are critical on
performance (such as net) and cannot accept even slight delay
on the refcounter operations.
This series, for core kernel components, replaces atomic_t reference
counters with the new refcount_t type and API (see include/linux/refcount.h).
By doing this we prevent intentional or accidental
underflows or overflows that can led to use-after-free vulnerabilities.
The patches are fully independent and can be cherry-picked separately.
If there are no objections to the patches, please merge them via respective trees.
Elena Reshetova (15):
sched: convert sighand_struct.count to refcount_t
sched: convert signal_struct.sigcnt to refcount_t
sched: convert user_struct.__count to refcount_t
sched: convert numa_group.refcount to refcount_t
sched/task_struct: convert task_struct.usage to refcount_t
sched/task_struct: convert task_struct.stack_refcount to refcount_t
perf: convert perf_event_context.refcount to refcount_t
perf/ring_buffer: convert ring_buffer.refcount to refcount_t
perf/ring_buffer: convert ring_buffer.aux_refcount to refcount_t
uprobes: convert uprobe.ref to refcount_t
nsproxy: convert nsproxy.count to refcount_t
groups: convert group_info.usage to refcount_t
creds: convert cred.usage to refcount_t
kcov: convert kcov.refcount to refcount_t
bdi: convert bdi_writeback_congested.refcnt from atomic_t to
refcount_t
fs/exec.c | 4 ++--
fs/proc/task_nommu.c | 2 +-
include/linux/backing-dev-defs.h | 3 ++-
include/linux/backing-dev.h | 4 ++--
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 | 5 +++--
include/linux/sched/signal.h | 5 +++--
include/linux/sched/task.h | 4 ++--
include/linux/sched/task_stack.h | 2 +-
include/linux/sched/user.h | 5 +++--
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/groups.c | 2 +-
kernel/kcov.c | 9 ++++----
kernel/nsproxy.c | 6 +++---
kernel/sched/fair.c | 12 +++++------
kernel/user.c | 8 +++----
mm/backing-dev.c | 14 ++++++------
25 files changed, 117 insertions(+), 106 deletions(-)
--
2.7.4
