Juntong Deng b111ae42bb bpf: Make the pointer returned by iter next method valid ... [ Upstream commit 4cc8c50c9abcb2646a7a4fcef3cea5dcb30c06cf ] Currently we cannot pass the pointer returned by iter next method as argument to KF_TRUSTED_ARGS or KF_RCU kfuncs, because the pointer returned by iter next method is not "valid". This patch sets the pointer returned by iter next method to be valid. This is based on the fact that if the iterator is implemented correctly, then the pointer returned from the iter next method should be valid. This does not make NULL pointer valid. If the iter next method has KF_RET_NULL flag, then the verifier will ask the ebpf program to check NULL pointer. KF_RCU_PROTECTED iterator is a special case, the pointer returned by iter next method should only be valid within RCU critical section, so it should be with MEM_RCU, not PTR_TRUSTED. Another special case is bpf_iter_num_next, which returns a pointer with base type PTR_TO_MEM. PTR_TO_MEM should not be combined with type flag PTR_TRUSTED (PTR_TO_MEM already means the pointer is valid). The pointer returned by iter next method of other types of iterators is with PTR_TRUSTED. In addition, this patch adds get_iter_from_state to help us get the current iterator from the current state. Signed-off-by: Juntong Deng <juntong.deng@outlook.com> Link: https://lore.kernel.org/r/AM6PR03MB584869F8B448EA1C87B7CDA399962@AM6PR03MB5848.eurprd03.prod.outlook.com Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-10-10 11:57:39 +02:00
..
bpf	bpf: Make the pointer returned by iter next method valid	2024-10-10 11:57:39 +02:00
cgroup	cgroup: Protect css->cgroup write under css_set_lock	2024-09-12 11:11:35 +02:00
configs	Kbuild updates for v6.6	2023-09-05 11:01:47 -07:00
debug	kdb: Use the passed prompt in kdb_position_cursor()	2024-08-03 08:54:34 +02:00
dma	dma-mapping: benchmark: Don't starve others when doing the test	2024-09-12 11:11:37 +02:00
entry	entry: Respect changes to system call number by trace_sys_enter()	2024-04-03 15:28:50 +02:00
events	perf: Fix event_function_call() locking	2024-10-10 11:57:37 +02:00
futex	futex: Don't include process MM in futex key on no-MMU	2023-11-20 11:58:53 +01:00
gcov	gcov: add support for GCC 14	2024-06-27 13:49:13 +02:00
irq	genirq/cpuhotplug: Retry with cpu_online_mask when migration fails	2024-08-19 06:04:24 +02:00
kcsan	kcsan: Don't expect 64 bits atomic builtins from 32 bits architectures	2023-06-09 23:29:50 +10:00
livepatch	livepatch: Fix missing newline character in klp_resolve_symbols()	2023-11-20 11:59:25 +01:00
locking	lockdep: fix deadlock issue between lockdep and rcu	2024-10-04 16:30:02 +02:00
module	module: Fix KCOV-ignored file name	2024-10-04 16:30:03 +02:00
power	PM: s2idle: Make sure CPUs will wakeup directly on resume	2024-04-17 11:19:26 +02:00
printk	printk: For @suppress_panic_printk check for other CPU in panic	2024-04-13 13:07:29 +02:00
rcu	rcuscale: Provide clear error when async specified without primitives	2024-10-10 11:57:31 +02:00
sched	sched/numa: Fix the vma scan starving issue	2024-10-04 16:29:22 +02:00
time	hrtimer: Prevent queuing of hrtimer without a function callback	2024-08-29 17:33:41 +02:00
trace	bpf: Fix use-after-free in bpf_uprobe_multi_link_attach()	2024-10-04 16:30:03 +02:00
.gitignore
acct.c	audit/stable-6.6 PR 20230829	2023-08-30 08:17:35 -07:00
async.c	async: Introduce async_schedule_dev_nocall()	2024-01-31 16:18:49 -08:00
audit.c	audit: Send netlink ACK before setting connection in auditd_set	2024-02-05 20:14:14 +00:00
audit.h	audit: correct audit_filter_inodes() definition	2023-07-21 12:17:25 -04:00
audit_fsnotify.c
audit_tree.c
audit_watch.c	audit: don't WARN_ON_ONCE(!current->mm) in audit_exe_compare()	2023-11-28 17:19:56 +00:00
auditfilter.c	ima: Avoid blocking in RCU read-side critical section	2024-07-11 12:49:18 +02:00
auditsc.c	audit,io_uring: io_uring openat triggers audit reference count underflow	2023-10-13 18:34:46 +02:00
backtracetest.c
bounds.c	bounds: Use the right number of bits for power-of-two CONFIG_NR_CPUS	2024-05-02 16:32:50 +02:00
capability.c	lsm: constify the 'target' parameter in security_capget()	2023-08-08 16:48:47 -04:00
cfi.c
compat.c	sched_getaffinity: don't assume 'cpumask_size()' is fully initialized	2023-03-14 19:32:38 -07:00
configs.c
context_tracking.c	locking/atomic: treewide: use raw_atomic*_<op>()	2023-06-05 09:57:20 +02:00
cpu.c	cpu/SMT: Enable SMT only if a core is online	2024-08-29 17:33:30 +02:00
cpu_pm.c
crash_core.c	mm: turn folio_test_hugetlb into a PageType	2024-05-02 16:32:47 +02:00
crash_dump.c
cred.c	cred: get rid of CONFIG_DEBUG_CREDENTIALS	2023-12-20 17:01:51 +01:00
delayacct.c	delayacct: track delays from IRQ/SOFTIRQ	2023-04-18 16:39:34 -07:00
dma.c
exec_domain.c
exit.c	mm: optimize the redundant loop of mm_update_owner_next()	2024-07-11 12:49:15 +02:00
extable.c
fail_function.c
fork.c	Revert "fork: defer linking file vma until vma is fully initialized"	2024-06-21 14:38:47 +02:00
freezer.c
gen_kheaders.sh	kheaders: explicitly define file modes for archived headers	2024-06-21 14:38:40 +02:00
groups.c
hung_task.c	kernel/hung_task.c: set some hung_task.c variables storage-class-specifier to static	2023-04-08 13:45:37 -07:00
iomem.c	kernel/iomem.c: remove __weak ioremap_cache helper	2023-08-21 13:37:28 -07:00
irq_work.c	trace: Add trace_ipi_send_cpu()	2023-03-24 11:01:29 +01:00
jump_label.c	jump_label: Fix static_key_slow_dec() yet again	2024-10-10 11:57:13 +02:00
kallsyms.c	kallsyms: Change func signature for cleanup_symbol_name()	2023-08-25 15:00:36 -07:00
kallsyms_internal.h
kallsyms_selftest.c	Modules changes for v6.6-rc1	2023-08-29 17:32:32 -07:00
kallsyms_selftest.h
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.kexec	kexec: select CRYPTO from KEXEC_FILE instead of depending on it	2024-01-05 15:19:41 +01:00
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: properly check for softirq context	2024-08-14 13:58:57 +02:00
kexec.c	kernel: kexec: copy user-array safely	2023-11-28 17:19:40 +00:00
kexec_core.c	kexec: do syscore_shutdown() in kernel_kexec	2024-01-31 16:18:56 -08:00
kexec_elf.c
kexec_file.c	kexec_file: fix elfcorehdr digest exclusion when CONFIG_CRASH_HOTPLUG=y	2024-09-12 11:11:27 +02:00
kexec_internal.h
kheaders.c	kheaders: Use array declaration instead of char	2023-03-24 20:10:59 -07:00
kprobes.c	kprobes: Fix to check symbol prefixes correctly	2024-08-14 13:58:51 +02:00
ksyms_common.c	kallsyms: make kallsyms_show_value() as generic function	2023-06-08 12:27:20 -07:00
ksysfs.c	crash: hotplug support for kexec_load()	2023-08-24 16:25:14 -07:00
kthread.c	kthread: fix task state in kthread worker if being frozen	2024-10-04 16:29:20 +02:00
latencytop.c
Makefile	kernel/numa.c: Move logging out of numa.h	2024-06-12 11:11:50 +02:00
module_signature.c
notifier.c	notifiers: add tracepoints to the notifiers infrastructure	2023-04-08 13:45:38 -07:00
nsproxy.c	nsproxy: Convert nsproxy.count to refcount_t	2023-08-21 11:29:12 -07:00
numa.c	kernel/numa.c: Move logging out of numa.h	2024-06-12 11:11:50 +02:00
padata.c	padata: use integer wrap around to prevent deadlock on seq_nr overflow	2024-10-04 16:29:56 +02:00
panic.c	panic: Flush kernel log buffer at the end	2024-04-13 13:07:29 +02:00
params.c	kernel: params: Remove unnecessary ‘0’ values from err	2023-07-10 12:47:01 -07:00
pid.c	pidfd: prevent a kernel-doc warning	2023-09-19 13:21:33 -07:00
pid_namespace.c	zap_pid_ns_processes: clear TIF_NOTIFY_SIGNAL along with TIF_SIGPENDING	2024-06-21 14:38:50 +02:00
pid_sysctl.h	memfd: replace ratcheting feature from vm.memfd_noexec with hierarchy	2023-08-21 13:37:59 -07:00
profile.c	profiling: remove profile=sleep support	2024-08-14 13:58:47 +02:00
ptrace.c	ptrace: Provide set/get interface for syscall user dispatch	2023-04-16 14:23:07 +02:00
range.c
reboot.c	kernel/reboot: emergency_restart: Set correct system_state	2023-11-28 17:20:04 +00:00
regset.c
relay.c	kernel: relay: remove unnecessary NULL values from relay_open_buf	2023-08-18 10:18:55 -07:00
resource.c	x86/kaslr: Expose and use the end of the physical memory address space	2024-09-12 11:11:25 +02:00
resource_kunit.c
rseq.c
scftorture.c	scftorture: Pause testing after memory-allocation failure	2023-07-14 15:02:57 -07:00
scs.c
seccomp.c	seccomp: Add missing kerndoc notations	2023-08-17 12:32:15 -07:00
signal.c	kernel: rerun task_work while freezing in get_signal()	2024-08-03 08:54:13 +02:00
smp.c	smp: Add missing destroy_work_on_stack() call in smp_call_on_cpu()	2024-09-12 11:11:37 +02:00
smpboot.c	kthread: add kthread_stop_put	2024-06-12 11:12:52 +02:00
smpboot.h
softirq.c	softirq: Fix suspicious RCU usage in __do_softirq()	2024-06-12 11:11:27 +02:00
stackleak.c	stackleak: allow to specify arch specific stackleak poison function	2023-04-20 11:36:35 +02:00
stacktrace.c
static_call.c
static_call_inline.c	static_call: Replace pointless WARN_ON() in static_call_module_notify()	2024-10-10 11:57:13 +02:00
stop_machine.c
sys.c	prctl: generalize PR_SET_MDWE support check to be per-arch	2024-04-03 15:28:54 +02:00
sys_ni.c	syscalls: fix compat_sys_io_pgetevents_time64 usage	2024-07-05 09:34:04 +02:00
sysctl-test.c
sysctl.c	v6.5-rc1-sysctl-next	2023-06-28 16:05:21 -07:00
task_work.c	task_work: Introduce task_work_cancel() again	2024-08-03 08:54:16 +02:00
taskstats.c
torture.c	rcutorture: Fix stuttering races and other issues	2023-11-28 17:20:08 +00:00
tracepoint.c	tracepoint: Allow livepatch module add trace event	2023-02-18 14:34:36 -05:00
tsacct.c
ucount.c	sysctl: Add size to register_sysctl	2023-08-15 15:26:17 -07:00
uid16.c
uid16.h
umh.c	sysctl: fix unused proc_cap_handler() function warning	2023-06-29 15:19:43 -07:00
up.c
user-return-notifier.c
user.c
user_namespace.c
usermode_driver.c
utsname.c
utsname_sysctl.c	utsname: simplify one-level sysctl registration for uts_kern_table	2023-04-13 11:49:35 -07:00
vhost_task.c	vhost_task: Handle SIGKILL by flushing work and exiting	2024-07-11 12:49:10 +02:00
watch_queue.c	kernel: watch_queue: copy user-array safely	2023-11-28 17:19:40 +00:00
watchdog.c	watchdog: move softlockup_panic back to early_param	2023-11-28 17:19:57 +00:00
watchdog_buddy.c	watchdog/hardlockup: move SMP barriers from common code to buddy code	2023-06-19 16:25:28 -07:00
watchdog_perf.c	watchdog/perf: properly initialize the turbo mode timestamp and rearm counter	2024-08-03 08:54:29 +02:00
workqueue.c	workqueue: Improve scalability of workqueue watchdog touch	2024-09-12 11:11:42 +02:00
workqueue_internal.h	workqueue: Drop the special locking rule for worker->flags and worker_pool->flags	2023-08-07 15:57:22 -10:00