Song Liu 1ca9ca19c1 ftrace: bpf: Fix IPMODIFY + DIRECT in modify_ftrace_direct() ... [ Upstream commit 3e9a18e1c3 ] ftrace_hash_ipmodify_enable() checks IPMODIFY and DIRECT ftrace_ops on the same kernel function. When needed, ftrace_hash_ipmodify_enable() calls ops->ops_func() to prepare the direct ftrace (BPF trampoline) to share the same function as the IPMODIFY ftrace (livepatch). ftrace_hash_ipmodify_enable() is called in register_ftrace_direct() path, but not called in modify_ftrace_direct() path. As a result, the following operations will break livepatch: 1. Load livepatch to a kernel function; 2. Attach fentry program to the kernel function; 3. Attach fexit program to the kernel function. After 3, the kernel function being used will not be the livepatched version, but the original version. Fix this by adding __ftrace_hash_update_ipmodify() to __modify_ftrace_direct() and adjust some logic around the call. Signed-off-by: Song Liu <song@kernel.org> Reviewed-by: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/r/20251027175023.1521602-3-song@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2026-01-11 15:18:14 +01:00
..
bpf	bpf: Sync pending IRQ work before freeing ring buffer	2025-12-07 06:12:11 +09:00
cgroup	cgroup: split cgroup_destroy_wq into 3 workqueues	2025-09-25 10:58:50 +02:00
configs
debug	kdb: Do not assume write() callback available	2025-02-21 13:50:09 +01:00
dma	dma/pool: Ensure DMA_DIRECT_REMAP allocations are decrypted	2025-09-04 15:26:30 +02:00
entry	entry: Respect changes to system call number by trace_sys_enter()	2024-04-03 15:19:44 +02:00
events	uprobe: Do not emulate/sstep original instruction when ip is changed	2025-12-07 06:12:17 +09:00
futex	futex: Don't leak robust_list pointer on exec race	2025-12-07 06:12:16 +09:00
gcov	gcov: add support for GCC 15	2025-12-07 06:12:35 +09:00
irq	genirq: Make handle_enforce_irqctx() unconditionally available	2025-02-21 13:48:57 +01:00
kcsan	kcsan: test: Initialize dummy variable	2025-08-15 12:04:59 +02:00
livepatch	livepatch: Fix missing newline character in klp_resolve_symbols()	2023-11-20 11:52:10 +01:00
locking	locking/spinlock/debug: Fix data-race in do_raw_write_lock	2026-01-11 15:18:13 +01:00
module	module: Prevent silent truncation of module name in delete_module(2)	2025-08-28 16:26:01 +02:00
power	PM: sleep: console: Fix the black screen issue	2025-08-28 16:25:53 +02:00
printk	printk: Fix signed integer overflow when defining LOG_BUF_LEN_MAX	2025-02-21 13:49:30 +01:00
rcu	rcu: Protect ->defer_qs_iw_pending from data race	2025-08-28 16:25:55 +02:00
sched	sched/fair: Fix pelt lost idle time detection	2025-10-29 14:04:35 +01:00
time	timers: Fix NULL function pointer race in timer_shutdown_sync()	2025-12-07 06:12:37 +09:00
trace	ftrace: bpf: Fix IPMODIFY + DIRECT in modify_ftrace_direct()	2026-01-11 15:18:14 +01:00
.gitignore
acct.c	acct: block access to kernel internal filesystems	2025-03-07 16:56:39 +01:00
async.c	async: Introduce async_schedule_dev_nocall()	2024-01-31 16:17:00 -08:00
audit_fsnotify.c
audit_tree.c
audit_watch.c	audit: don't WARN_ON_ONCE(!current->mm) in audit_exe_compare()	2023-11-28 17:07:08 +00:00
audit.c	audit: Send netlink ACK before setting connection in auditd_set	2024-02-05 20:12:47 +00:00
audit.h
auditfilter.c	ima: Avoid blocking in RCU read-side critical section	2024-07-11 12:47:16 +02:00
auditsc.c	audit,io_uring: io_uring openat triggers audit reference count underflow	2023-10-25 12:03:04 +02:00
backtracetest.c
bounds.c	bounds: Use the right number of bits for power-of-two CONFIG_NR_CPUS	2024-05-02 16:29:32 +02:00
capability.c
cfi.c
compat.c
configs.c
context_tracking.c
cpu_pm.c
cpu.c	hrtimers: Handle CPU state correctly on hotplug	2025-01-23 17:17:15 +01:00
crash_core.c
crash_dump.c
cred.c	cred: switch to using atomic_long_t	2023-12-20 17:00:20 +01:00
delayacct.c
dma.c
exec_domain.c
exit.c	perf: Fix sample vs do_exit()	2025-06-27 11:07:41 +01:00
extable.c
fail_function.c
fork.c	copy_sighand: Handle architectures where sizeof(unsigned long) < sizeof(u64)	2025-10-19 16:23:12 +02:00
freezer.c
gen_kheaders.sh	kheaders: Ignore silly-rename files	2025-01-23 17:17:11 +01:00
groups.c
hung_task.c
iomem.c
irq_work.c
jump_label.c	jump_label: Fix static_key_slow_dec() yet again	2024-10-17 15:21:29 +02:00
kallsyms_internal.h	kallsyms: Reduce the memory occupied by kallsyms_seqs_of_names[]	2023-10-25 12:03:16 +02:00
kallsyms.c	kallsyms: Add helper kallsyms_on_each_match_symbol()	2023-10-25 12:03:16 +02:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: mark in_softirq_really() as __always_inline	2025-01-09 13:30:05 +01:00
kexec_core.c
kexec_elf.c	kexec: initialize ELF lowest address to ULONG_MAX	2025-04-10 14:33:36 +02:00
kexec_file.c
kexec_internal.h
kexec.c	kernel: kexec: copy user-array safely	2023-11-28 17:06:57 +00:00
kheaders.c
kmod.c
kprobes.c	kprobes: Fix to check symbol prefixes correctly	2024-08-14 13:52:54 +02:00
ksysfs.c
kthread.c	kthread: unpark only parked kthread	2024-10-17 15:22:28 +02:00
latencytop.c
Makefile	kernel/numa.c: Move logging out of numa.h	2024-06-12 11:03:16 +02:00
module_signature.c
notifier.c
nsproxy.c
numa.c	kernel/numa.c: Move logging out of numa.h	2024-06-12 11:03:16 +02:00
padata.c	padata: Reset next CPU when reorder sequence wraps around	2025-10-29 14:04:40 +01:00
panic.c	panic: Flush kernel log buffer at the end	2024-04-13 13:04:54 +02:00
params.c	module: ensure that kobject_put() is safe for module type kobjects	2025-05-18 08:21:23 +02:00
pid_namespace.c	pid: Replace struct pid 1-element array with flex-array	2024-08-29 17:30:18 +02:00
pid.c	pid: Add a judgment for ns null in pid_nr_ns	2025-10-19 16:23:22 +02:00
profile.c	profiling: remove profile=sleep support	2024-08-14 13:52:50 +02:00
ptrace.c
range.c
reboot.c	kernel/reboot: emergency_restart: Set correct system_state	2023-11-28 17:07:13 +00:00
regset.c
relay.c
resource_kunit.c
resource.c	resource: fix region_intersects() vs add_memory_driver_managed()	2024-10-17 15:21:55 +02:00
rseq.c	rseq: Protect event mask against membarrier IPI	2025-10-19 16:23:21 +02:00
scftorture.c	scftorture: Forgive memory-allocation failure if KASAN	2023-09-23 11:11:00 +02:00
scs.c
seccomp.c	seccomp: Fix a race with WAIT_KILLABLE_RECV if the tracer replies too fast	2025-10-15 11:56:25 +02:00
signal.c	signal: restore the override_rlimit logic	2024-11-14 13:15:18 +01:00
smp.c	smp: Fix up and expand the smp_call_function_many() kerneldoc	2025-10-15 11:56:29 +02:00
smpboot.c
smpboot.h
softirq.c	softirq: Add trace points for tasklet entry/exit	2025-12-07 06:12:34 +09:00
stackleak.c
stacktrace.c
static_call_inline.c	x86/static-call: provide a way to do very early static-call updates	2024-12-19 18:08:58 +01:00
static_call.c
stop_machine.c
sys_ni.c	syscalls: fix compat_sys_io_pgetevents_time64 usage	2024-07-05 09:31:59 +02:00
sys.c	kernel/sys.c: fix the racy usage of task_lock(tsk->group_leader) in sys_prlimit64() paths	2025-10-19 16:23:14 +02:00
sysctl-test.c
sysctl.c
task_work.c	task_work: Introduce task_work_cancel() again	2024-08-03 08:49:34 +02:00
taskstats.c
torture.c
tracepoint.c
tsacct.c
ucount.c	ucount: fix atomic_long_inc_below() argument type	2025-08-15 12:05:05 +02:00
uid16.c
uid16.h
umh.c
up.c
user_namespace.c
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 14:33:30 +02:00
watchdog_hld.c	watchdog/perf: properly initialize the turbo mode timestamp and rearm counter	2024-08-03 08:49:42 +02:00
watchdog.c	watchdog: move softlockup_panic back to early_param	2023-11-28 17:07:09 +00:00
workqueue_internal.h
workqueue.c	workqueue: Improve scalability of workqueue watchdog touch	2024-09-12 11:10:27 +02:00