Peter Zijlstra 3ac6487e58 perf: Fix sys_perf_event_open() race against self ... Norbert reported that it's possible to race sys_perf_event_open() such that the looser ends up in another context from the group leader, triggering many WARNs. The move_group case checks for races against itself, but the !move_group case doesn't, seemingly relying on the previous group_leader->ctx == ctx check. However, that check is racy due to not holding any locks at that time. Therefore, re-check the result after acquiring locks and bailing if they no longer match. Additionally, clarify the not_move_group case from the move_group-vs-move_group race. Fixes: f63a8daa58 ("perf: Fix event->ctx locking") Reported-by: Norbert Slusarek <nslusarek@gmx.net> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2022-05-20 08:44:00 -10:00
..
bpf	bpf: Fix maximum permitted number of arguments check	2022-03-28 19:08:17 -07:00
cgroup	cgroup/cpuset: Remove cpus_allowed/mems_allowed setup in cpuset_init_smp()	2022-05-05 08:57:00 -10:00
configs	Char/Misc and other driver updates for 5.18-rc1	2022-03-28 12:27:35 -07:00
debug	kdb: Fix the putarea helper function	2022-03-24 16:39:47 +00:00
dma	dma-direct: avoid redundant memory sync for swiotlb	2022-04-14 06:30:39 +02:00
entry	entry: Fix compile error in dynamic_irqentry_exit_cond_resched()	2022-04-05 09:59:36 +02:00
events	perf: Fix sys_perf_event_open() race against self	2022-05-20 08:44:00 -10:00
futex	mm/truncate: Inline invalidate_complete_page() into its one caller	2022-03-21 12:59:01 -04:00
gcov	…
irq	genirq: Remove WARN_ON_ONCE() in generic_handle_domain_irq()	2022-05-11 02:22:52 +02:00
kcsan	…
livepatch	ptrace: Cleanups for v5.18	2022-03-28 17:29:53 -07:00
locking	Changes in this cycle were:	2022-03-22 13:44:21 -07:00
power	for-5.18/block-2022-03-18	2022-03-21 16:48:55 -07:00
printk	printk changes for 5.18	2022-03-23 10:54:27 -07:00
rcu	Changes in this cycle were:	2022-03-22 14:39:12 -07:00
sched	sched/tracing: Append prev_state to tp args instead	2022-05-12 00:37:11 +02:00
time	timekeeping: Mark NMI safe time accessors as notrace	2022-04-29 00:07:53 +02:00
trace	sched/tracing: Append prev_state to tp args instead	2022-05-12 00:37:11 +02:00
.gitignore	…
Kconfig.freezer	…
Kconfig.hz	…
Kconfig.locks	…
Kconfig.preempt	Revert "signal, x86: Delay calling signals in atomic on RT enabled kernels"	2022-03-31 10:36:55 +02:00
Makefile	static_call: Don't make __static_call_return0 static	2022-04-05 09:59:38 +02:00
acct.c	…
async.c	…
audit.c	…
audit.h	audit: log AUDIT_TIME_* records only from rules	2022-02-22 13:51:40 -05:00
audit_fsnotify.c	…
audit_tree.c	…
audit_watch.c	…
auditfilter.c	…
auditsc.c	audit,io_uring,io-wq: call __audit_uring_exit for dummy contexts	2022-05-17 15:03:36 -04:00
backtracetest.c	…
bounds.c	…
capability.c	xfs: don't generate selinux audit messages for capability testing	2022-03-09 10:32:06 -08:00
cfi.c	…
compat.c	…
configs.c	…
context_tracking.c	…
cpu.c	cpu/hotplug: Remove the 'cpu' member of cpuhp_cpu_state	2022-04-13 21:25:40 +02:00
cpu_pm.c	…
crash_core.c	…
crash_dump.c	…
cred.c	x86: Mark __invalid_creds() __noreturn	2022-03-15 10:32:44 +01:00
delayacct.c	…
dma.c	…
exec_domain.c	…
exit.c	ptrace: Cleanups for v5.18	2022-03-28 17:29:53 -07:00
extable.c	…
fail_function.c	…
fork.c	mm: Fix PASID use-after-free issue	2022-05-01 10:17:17 +02:00
freezer.c	…
gen_kheaders.sh	…
groups.c	…
hung_task.c	…
iomem.c	…
irq_work.c	irq_work: use kasan_record_aux_stack_noalloc() record callstack	2022-04-15 14:49:55 -07:00
jump_label.c	…
kallsyms.c	kallsyms: Skip the name search for empty string	2022-03-17 20:17:18 -07:00
kcmp.c	…
kcov.c	kcov: don't generate a warning on vm_insert_page()'s failure	2022-04-21 20:01:10 -07:00
kexec.c	…
kexec_core.c	…
kexec_elf.c	…
kexec_file.c	…
kexec_internal.h	…
kheaders.c	…
kmod.c	…
kprobes.c	kprobes: Fix KRETPROBES when CONFIG_KRETPROBE_ON_RETHOOK is set	2022-04-26 16:09:36 +02:00
ksysfs.c	kernel/ksysfs.c: use helper macro __ATTR_RW	2022-03-23 19:00:33 -07:00
kthread.c	asm-generic updates for 5.18	2022-03-23 18:03:08 -07:00
latencytop.c	…
module-internal.h	…
module.c	NFSD: Remove svc_serv_ops::svo_module	2022-02-28 10:26:40 -05:00
module_decompress.c	…
module_signature.c	…
module_signing.c	…
notifier.c	…
nsproxy.c	…
padata.c	…
panic.c	panic: move panic_print before kmsg dumpers	2022-03-23 19:00:35 -07:00
params.c	…
pid.c	…
pid_namespace.c	…
profile.c	…
ptrace.c	ptrace: Check PTRACE_O_SUSPEND_SECCOMP permission on PTRACE_SEIZE	2022-03-22 13:06:05 -05:00
range.c	…
reboot.c	…
regset.c	…
relay.c	…
resource.c	kernel/resource: fix kfree() of bootmem memory again	2022-03-23 19:00:35 -07:00
resource_kunit.c	…
rseq.c	…
scftorture.c	…
scs.c	kasan, vmalloc: only tag normal vmalloc allocations	2022-03-24 19:06:48 -07:00
seccomp.c	ptrace: Cleanups for v5.18	2022-03-28 17:29:53 -07:00
signal.c	Revert "signal, x86: Delay calling signals in atomic on RT enabled kernels"	2022-03-31 10:36:55 +02:00
smp.c	smp: Fix offline cpu check in flush_smp_call_function_queue()	2022-04-13 18:44:35 +02:00
smpboot.c	…
smpboot.h	…
softirq.c	…
stackleak.c	…
stacktrace.c	uaccess: remove CONFIG_SET_FS	2022-02-25 09:36:06 +01:00
static_call.c	static_call: Don't make __static_call_return0 static	2022-04-05 09:59:38 +02:00
static_call_inline.c	static_call: Don't make __static_call_return0 static	2022-04-05 09:59:38 +02:00
stop_machine.c	…
sys.c	prlimit: do not grab the tasklist_lock	2022-03-08 14:33:36 -06:00
sys_ni.c	…
sysctl-test.c	…
sysctl.c	Merge branch 'akpm' (patches from Andrew)	2022-03-22 16:11:53 -07:00
task_work.c	resume_user_mode: Move to resume_user_mode.h	2022-03-10 16:51:50 -06:00
taskstats.c	taskstats: remove unneeded dead assignment	2022-03-23 19:00:35 -07:00
torture.c	…
tracepoint.c	…
tsacct.c	…
ucount.c	…
uid16.c	…
uid16.h	…
umh.c	…
up.c	…
user-return-notifier.c	…
user.c	…
user_namespace.c	ucounts: Fix systemd LimitNPROC with private users regression	2022-02-25 10:40:14 -06:00
usermode_driver.c	…
utsname.c	…
utsname_sysctl.c	…
watch_queue.c	watch_queue: Free the page array when watch_queue is dismantled	2022-04-02 10:37:39 -07:00
watchdog.c	…
watchdog_hld.c	…
workqueue.c	Merge branch 'for-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	2022-03-23 12:40:51 -07:00
workqueue_internal.h	…