Peter Zijlstra fb099f3bb4 futex: Fix inode life-time issue ...

commit 8019ad13ef upstream.

As reported by Jann, ihold() does not in fact guarantee inode
persistence. And instead of making it so, replace the usage of inode
pointers with a per boot, machine wide, unique inode identifier.

This sequence number is global, but shared (file backed) futexes are
rare enough that this should not become a performance issue.

Reported-by: Jann Horn <jannh@google.com>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2020-04-02 17:20:27 +02:00

..

bpf

bpf: fix bpf_jit_limit knob for PAGE_SIZE >= 64K

2019-08-25 10:51:50 +02:00

configs

config: android: enable CONFIG_SECCOMP

2016-10-11 15:06:32 -07:00

debug

kdb: do a sanity check on the cpu in kdb_per_cpu()

2020-01-29 10:24:24 +01:00

events

perf/core: Fix mlock accounting in perf_mmap()

2020-02-14 16:31:08 -05:00

gcov

gcov: support GCC 7.1

2017-09-02 07:07:53 +02:00

irq

genirq: Prevent NULL pointer dereference in resend_irqs()

2019-09-21 07:14:04 +02:00

livepatch

…

locking

locking/spinlock/debug: Fix various data races

2020-01-12 11:24:20 +01:00

power

PM / hibernate: memory_bm_find_bit(): Tighten node optimisation

2020-01-12 11:24:11 +01:00

printk

printk: fix integer overflow in setup_log_buf()

2019-11-28 18:28:15 +01:00

rcu

rcuperf: Fix cleanup path for invalid perf_type strings

2019-05-31 06:48:30 -07:00

sched

sched/fair: Scale bandwidth quota and period without losing quota/period ratio precision

2019-12-21 10:41:28 +01:00

time

clocksource: Prevent double add_timer_on() for watchdog_timer

2020-02-14 16:31:08 -05:00

trace

trigger_next should increase position index

2020-02-28 15:42:40 +01:00

.gitignore

…

acct.c

kernel/acct.c: fix the acct->needcheck check in check_free_space()

2018-01-10 09:29:51 +01:00

async.c

kernel/async.c: revert "async: simplify lowest_in_progress()"

2018-02-17 13:21:18 +01:00

audit_fsnotify.c

…

audit_tree.c

…

audit_watch.c

audit_get_nd(): don't unlock parent too early

2019-12-21 10:40:48 +01:00

audit.c

audit: always check the netlink payload length in audit_receive_msg()

2020-03-11 07:53:08 +01:00

audit.h

…

auditfilter.c

audit: fix error handling in audit_data_to_entry()

2020-03-11 07:53:05 +01:00

auditsc.c

audit: print empty EXECVE args

2019-11-28 18:28:55 +01:00

backtracetest.c

…

bounds.c

kbuild: fix kernel/bounds.c 'W=1' warning

2018-11-13 11:16:57 -08:00

capability.c

ptrace: Capture the ptracer's creds not PT_PTRACE_CAP

2017-01-06 10:40:13 +01:00

cgroup_freezer.c

…

cgroup_pids.c

cgroup: pids: use atomic64_t for pids->limit

2019-12-21 10:42:02 +01:00

cgroup.c

cgroup: memcg: net: do not associate sock with unrelated cgroup

2020-03-20 09:07:43 +01:00

compat.c

…

configs.c

…

context_tracking.c

…

cpu_pm.c

…

cpu.c

cpu/hotplug, stop_machine: Fix stop_machine vs hotplug order

2020-02-28 15:42:16 +01:00

cpuset.c

sched/cpuset/pm: Fix cpuset vs. suspend-resume bugs

2017-10-12 11:51:25 +02:00

crash_dump.c

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cred.c

memcg: account security cred as well to kmemcg

2020-01-12 11:24:13 +01:00

delayacct.c

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dma.c

…

elfcore.c

kernel/elfcore.c: include proper prototypes

2019-10-17 13:42:13 -07:00

exec_domain.c

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exit.c

kernel/exit.c: release ptraced tasks before zap_pid_ns_processes

2019-02-06 17:33:29 +01:00

extable.c

kernel/extable.c: mark core_kernel_text notrace

2017-07-21 07:42:21 +02:00

fork.c

kernel/sysctl.c: do not override max_threads provided by userspace

2019-10-17 13:42:44 -07:00

freezer.c

…

futex_compat.c

…

futex.c

futex: Fix inode life-time issue

2020-04-02 17:20:27 +02:00

groups.c

kernel: make groups_sort calling a responsibility group_info allocators

2018-01-10 09:29:52 +01:00

hung_task.c

kernel: hung_task.c: disable on suspend

2019-04-20 09:07:52 +02:00

irq_work.c

…

jump_label.c

jump_label: Invoke jump_label_test() via early_initcall()

2017-12-14 09:28:24 +01:00

kallsyms.c

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kcmp.c

…

Kconfig.freezer

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Kconfig.hz

…

Kconfig.locks

…

Kconfig.preempt

…

kcov.c

kcov: ensure irq code sees a valid area

2018-08-03 07:55:12 +02:00

kexec_core.c

objtool, x86: Add several functions and files to the objtool whitelist

2018-06-05 10:28:57 +02:00

kexec_file.c

…

kexec_internal.h

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kexec.c

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kmod.c

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kprobes.c

kprobes: Don't call BUG_ON() if there is a kprobe in use on free list

2019-11-25 09:52:15 +01:00

ksysfs.c

…

kthread.c

kthread, tracing: Don't expose half-written comm when creating kthreads

2018-08-03 07:55:12 +02:00

latencytop.c

…

Makefile

x86/uaccess, kcov: Disable stack protector

2019-06-22 08:17:19 +02:00

membarrier.c

Fix: Disable sys_membarrier when nohz_full is enabled

2017-03-12 06:41:45 +01:00

memremap.c

mm, devm_memremap_pages: kill mapping "System RAM" support

2019-01-13 10:03:51 +01:00

module_signing.c

…

module-internal.h

…

module.c

kernel/module.c: wakeup processes in module_wq on module unload

2019-12-21 10:42:21 +01:00

notifier.c

x86/mm: split vmalloc_sync_all()

2020-04-02 17:20:26 +02:00

nsproxy.c

…

padata.c

padata: Remove broken queue flushing

2020-02-28 15:42:13 +01:00

panic.c

panic: ensure preemption is disabled during panic()

2019-10-17 13:42:25 -07:00

params.c

…

pid_namespace.c

signal/pid_namespace: Fix reboot_pid_ns to use send_sig not force_sig

2019-08-04 09:33:16 +02:00

pid.c

pidns: disable pid allocation if pid_ns_prepare_proc() is failed in alloc_pid()

2018-04-13 19:47:53 +02:00

profile.c

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ptrace.c

ptrace: Fix ->ptracer_cred handling for PTRACE_TRACEME

2019-07-10 09:55:45 +02:00

range.c

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reboot.c

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relay.c

kernel/relay.c: limit kmalloc size to KMALLOC_MAX_SIZE

2018-05-30 07:50:29 +02:00

resource.c

resource: fix integer overflow at reallocation

2018-04-24 09:34:09 +02:00

seccomp.c

seccomp: Move speculation migitation control to arch code

2018-05-22 16:58:02 +02:00

signal.c

signal: avoid double atomic counter increments for user accounting

2020-03-20 09:07:57 +01:00

smp.c

cpu/hotplug: Fix SMT supported evaluation

2018-08-15 18:14:53 +02:00

smpboot.c

kthread/smpboot: do not park in kthread_create_on_cpu()

2016-10-11 15:06:33 -07:00

smpboot.h

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softirq.c

Mark HI and TASKLET softirq synchronous

2018-08-15 18:14:42 +02:00

stacktrace.c

stacktrace, lockdep: Fix address, newline ugliness

2017-02-14 15:25:42 -08:00

stop_machine.c

stop_machine: Use raw spinlocks

2018-08-03 07:55:24 +02:00

sys_ni.c

x86/pkeys: Fix pkeys build breakage for some non-x86 arches

2016-09-13 14:41:36 +02:00

sys.c

kernel/sys.c: prctl: fix false positive in validate_prctl_map()

2019-06-22 08:17:13 +02:00

sysctl_binary.c

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sysctl.c

kernel: sysctl: make drop_caches write-only

2020-01-04 13:41:04 +01:00

task_work.c

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taskstats.c

taskstats: fix data-race

2020-01-12 11:24:12 +01:00

test_kprobes.c

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torture.c

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tracepoint.c

tracepoint: Do not warn on ENOMEM

2018-05-09 09:50:20 +02:00

tsacct.c

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ucount.c

kernel/ucount.c: mark user_header with kmemleak_ignore()

2017-06-17 06:41:51 +02:00

uid16.c

kernel: make groups_sort calling a responsibility group_info allocators

2018-01-10 09:29:52 +01:00

up.c

smp: Add function to execute a function synchronously on a CPU

2016-09-05 13:52:39 +02:00

user_namespace.c

userns: move user access out of the mutex

2018-09-09 20:01:24 +02:00

user-return-notifier.c

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user.c

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utsname_sysctl.c

sys: don't hold uts_sem while accessing userspace memory

2018-09-09 20:01:24 +02:00

utsname.c

Merge branch 'nsfs-ioctls' into HEAD

2016-09-22 20:00:36 -05:00

watchdog_hld.c

kernel/watchdog: prevent false hardlockup on overloaded system

2017-06-17 06:41:57 +02:00

watchdog.c

kernel/watchdog: prevent false hardlockup on overloaded system

2017-06-17 06:41:57 +02:00

workqueue_internal.h

workqueue: Fix NULL pointer dereference

2017-11-15 15:53:17 +01:00

workqueue.c

workqueue: don't use wq_select_unbound_cpu() for bound works

2020-03-20 09:07:43 +01:00