Douglas Raillard 72848b81b3 tracing: Ensure module defining synth event cannot be unloaded while tracing ... commit 21581dd4e7 upstream. Currently, using synth_event_delete() will fail if the event is being used (tracing in progress), but that is normally done in the module exit function. At that stage, failing is problematic as returning a non-zero status means the module will become locked (impossible to unload or reload again). Instead, ensure the module exit function does not get called in the first place by increasing the module refcnt when the event is enabled. Cc: stable@vger.kernel.org Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Fixes: 35ca5207c2 ("tracing: Add synthetic event command generation functions") Link: https://lore.kernel.org/20250318180906.226841-1-douglas.raillard@arm.com Signed-off-by: Douglas Raillard <douglas.raillard@arm.com> Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2025-04-10 14:31:02 +02:00
..
bpf	bpf: skip non exist keys in generic_map_lookup_batch	2025-03-13 12:47:29 +01:00
cgroup	cgroup/bpf: only cgroup v2 can be attached by bpf programs	2024-12-14 19:47:47 +01:00
configs
debug	kdb: Do not assume write() callback available	2025-03-13 12:47:22 +01:00
dma	dma-debug: fix a possible deadlock on radix_lock	2024-12-14 19:48:28 +01:00
entry	entry/kvm: Exit to user mode when TIF_NOTIFY_SIGNAL is set	2023-01-04 11:39:22 +01:00
events	perf/ring_buffer: Allow the EPOLLRDNORM flag for poll	2025-04-10 14:30:56 +02:00
futex	futex: Don't include process MM in futex key on no-MMU	2023-11-20 11:06:44 +01:00
gcov	gcov: add support for GCC 14	2024-07-05 09:12:41 +02:00
irq	genirq: Make handle_enforce_irqctx() unconditionally available	2025-03-13 12:46:45 +01:00
kcsan	kcsan: Turn report_filterlist_lock into a raw_spinlock	2024-12-14 19:48:25 +01:00
livepatch	kallsyms: refactor {,module_}kallsyms_on_each_symbol	2024-06-21 14:52:58 +02:00
locking	locking/semaphore: Use wake_q to wake up processes outside lock critical section	2025-04-10 14:31:00 +02:00
power	PM: hibernate: Add error handling for syscore_suspend()	2025-03-13 12:46:57 +01:00
printk	printk: Fix signed integer overflow when defining LOG_BUF_LEN_MAX	2025-03-13 12:47:01 +01:00
rcu	rcu-tasks: Idle tasks on offline CPUs are in quiescent states	2024-12-14 19:47:42 +01:00
sched	sched/deadline: Use online cpus for validating runtime	2025-04-10 14:31:00 +02:00
time	hrtimers: Mark is_migration_base() with __always_inline	2025-04-10 14:30:49 +02:00
trace	tracing: Ensure module defining synth event cannot be unloaded while tracing	2025-04-10 14:31:02 +02:00
.gitignore
acct.c	acct: perform last write from workqueue	2025-03-13 12:47:35 +01:00
async.c	async: Introduce async_schedule_dev_nocall()	2024-02-23 08:41:53 +01:00
audit_fsnotify.c	fsnotify: make allow_dups a property of the group	2024-06-21 14:53:39 +02:00
audit_tree.c	fsnotify: pass flags argument to fsnotify_alloc_group()	2024-06-21 14:53:39 +02:00
audit_watch.c	fsnotify: pass flags argument to fsnotify_alloc_group()	2024-06-21 14:53:39 +02:00
audit.c	audit: Send netlink ACK before setting connection in auditd_set	2024-02-23 08:42:03 +01:00
audit.h	audit: log AUDIT_TIME_* records only from rules	2022-04-08 14:40:00 +02:00
auditfilter.c	ima: Avoid blocking in RCU read-side critical section	2024-07-18 13:05:44 +02:00
auditsc.c	audit: fix possible soft lockup in __audit_inode_child()	2023-09-19 12:20:13 +02:00
backtracetest.c
bounds.c	bounds: Use the right number of bits for power-of-two CONFIG_NR_CPUS	2024-05-02 16:23:46 +02:00
capability.c
compat.c	sched_getaffinity: don't assume 'cpumask_size()' is fully initialized	2023-04-05 11:23:45 +02:00
configs.c
context_tracking.c
cpu_pm.c	PM: cpu: Make notifier chain use a raw_spinlock_t	2021-09-15 09:50:40 +02:00
cpu.c	hrtimers: Handle CPU state correctly on hotplug	2025-02-01 18:22:29 +01:00
crash_core.c
crash_dump.c
cred.c	cred: switch to using atomic_long_t	2023-12-20 15:44:30 +01:00
delayacct.c
dma.c
exec_domain.c
exit.c	mm: optimize the redundant loop of mm_update_owner_next()	2024-07-18 13:05:42 +02:00
extable.c
fail_function.c	kernel/fail_function: fix memory leak with using debugfs_lookup()	2023-03-11 16:40:18 +01:00
fork.c	exec: Simplify unshare_files	2024-06-21 14:52:47 +02:00
freezer.c
gen_kheaders.sh	kheaders: Ignore silly-rename files	2025-02-01 18:22:28 +01:00
groups.c
hung_task.c
iomem.c
irq_work.c
jump_label.c	jump_label: Fix jump_label_text_reserved() vs __init	2021-07-20 16:05:58 +02:00
kallsyms.c	kallsyms: Make kallsyms_on_each_symbol generally available	2024-10-17 15:08:29 +02:00
kcmp.c	kcmp: In get_file_raw_ptr use task_lookup_fd_rcu	2024-06-21 14:52:48 +02:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: don't lose track of remote references during softirqs	2024-07-05 09:12:41 +02:00
kexec_core.c	kexec: fix a memory leak in crash_shrink_memory()	2023-07-27 08:43:40 +02:00
kexec_elf.c	kexec: initialize ELF lowest address to ULONG_MAX	2025-04-10 14:30:58 +02:00
kexec_file.c	kexec: support purgatories with .text.hot sections	2023-06-21 15:45:37 +02:00
kexec_internal.h	panic, kexec: make __crash_kexec() NMI safe	2023-04-20 12:10:29 +02:00
kexec.c	panic, kexec: make __crash_kexec() NMI safe	2023-04-20 12:10:29 +02:00
kheaders.c	kheaders: Use array declaration instead of char	2023-05-17 11:47:33 +02:00
kmod.c
kprobes.c	x86/ibt,ftrace: Search for __fentry__ location	2024-10-17 15:07:37 +02:00
ksysfs.c	kexec: turn all kexec_mutex acquisitions into trylocks	2023-04-20 12:10:29 +02:00
kthread.c	kthread: fix task state in kthread worker if being frozen	2024-10-17 15:07:50 +02:00
latencytop.c
Makefile	futex: Move to kernel/futex/	2023-01-14 10:15:20 +01:00
module_signature.c
module_signing.c
module-internal.h
module.c	kallsyms: Make module_kallsyms_on_each_symbol generally available	2024-10-17 15:08:29 +02:00
notifier.c
nsproxy.c
padata.c	padata: avoid UAF for reorder_work	2025-03-13 12:46:52 +01:00
panic.c	panic: Flush kernel log buffer at the end	2024-04-13 12:59:40 +02:00
params.c	params: lift param_set_uint_minmax to common code	2024-06-16 13:32:26 +02:00
pid_namespace.c	zap_pid_ns_processes: clear TIF_NOTIFY_SIGNAL along with TIF_SIGPENDING	2024-07-05 09:12:33 +02:00
pid.c	kernel/pid.c: implement additional checks upon pidfd_create() parameters	2024-06-21 14:53:17 +02:00
profile.c	kernel: Initialize cpumask before parsing	2025-01-09 13:25:04 +01:00
ptrace.c	ptrace: Reimplement PTRACE_KILL by always sending SIGKILL	2022-06-09 10:20:49 +02:00
range.c
reboot.c	kernel/reboot: emergency_restart: Set correct system_state	2023-11-28 16:54:58 +00:00
regset.c
relay.c	relayfs: fix out-of-bounds access in relay_file_read	2023-05-17 11:47:34 +02:00
resource.c	resource: fix region_intersects() vs add_memory_driver_managed()	2024-10-17 15:08:36 +02:00
rseq.c	rseq: Remove broken uapi field layout on 32-bit little endian	2022-04-08 14:40:03 +02:00
scftorture.c	scftorture: Forgive memory-allocation failure if KASAN	2023-09-23 11:01:05 +02:00
scs.c
seccomp.c	seccomp: Invalidate seccomp mode to catch death failures	2024-03-01 13:16:46 +01:00
signal.c	signal: Replace BUG_ON()s	2024-10-17 15:08:12 +02:00
smp.c	smp: Add missing destroy_work_on_stack() call in smp_call_on_cpu()	2024-09-12 11:06:48 +02:00
smpboot.c
smpboot.h
softirq.c
stackleak.c	gcc-plugins/stackleak: Use noinstr in favor of notrace	2022-02-23 12:01:00 +01:00
stacktrace.c
static_call.c	x86/static-call: provide a way to do very early static-call updates	2024-12-19 18:06:13 +01:00
stop_machine.c
sys_ni.c	syscalls: fix compat_sys_io_pgetevents_time64 usage	2024-07-05 09:12:55 +02:00
sys.c	fs: add file and path permissions helpers	2024-06-21 14:52:58 +02:00
sysctl-test.c
sysctl.c	sysctl: introduce new proc handler proc_dobool	2024-06-21 14:53:18 +02:00
task_work.c	task_work: Introduce task_work_cancel() again	2024-08-19 05:40:57 +02:00
taskstats.c
test_kprobes.c
torture.c	torture: Fix hang during kthread shutdown phase	2023-08-30 16:23:17 +02:00
tracepoint.c	tracepoint: Use rcu get state and cond sync for static call updates	2021-09-03 10:09:30 +02:00
tsacct.c	taskstats: Cleanup the use of task->exit_code	2022-01-27 10:54:33 +01:00
ucount.c	fanotify: configurable limits via sysfs	2024-06-21 14:53:06 +02:00
uid16.c
uid16.h
umh.c
up.c
user_namespace.c	Revert "Add a reference to ucounts for each cred"	2021-09-08 08:49:00 +02:00
user-return-notifier.c
user.c
usermode_driver.c
utsname_sysctl.c
utsname.c
watch_queue.c	watch_queue: fix pipe accounting mismatch	2025-04-10 14:30:55 +02:00
watchdog_hld.c	watchdog/perf: properly initialize the turbo mode timestamp and rearm counter	2024-08-19 05:41:01 +02:00
watchdog.c	watchdog: move softlockup_panic back to early_param	2023-11-28 16:54:56 +00:00
workqueue_internal.h
workqueue.c	Revert "workqueue: remove unused cancel_work()"	2023-12-08 08:46:13 +01:00