Lu Jialin fb2d3a50a8 crypto: pcrypt - Fix hungtask for PADATA_RESET ... [ Upstream commit 8f4f68e788 ] We found a hungtask bug in test_aead_vec_cfg as follows: INFO: task cryptomgr_test:391009 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Call trace: __switch_to+0x98/0xe0 __schedule+0x6c4/0xf40 schedule+0xd8/0x1b4 schedule_timeout+0x474/0x560 wait_for_common+0x368/0x4e0 wait_for_completion+0x20/0x30 wait_for_completion+0x20/0x30 test_aead_vec_cfg+0xab4/0xd50 test_aead+0x144/0x1f0 alg_test_aead+0xd8/0x1e0 alg_test+0x634/0x890 cryptomgr_test+0x40/0x70 kthread+0x1e0/0x220 ret_from_fork+0x10/0x18 Kernel panic - not syncing: hung_task: blocked tasks For padata_do_parallel, when the return err is 0 or -EBUSY, it will call wait_for_completion(&wait->completion) in test_aead_vec_cfg. In normal case, aead_request_complete() will be called in pcrypt_aead_serial and the return err is 0 for padata_do_parallel. But, when pinst->flags is PADATA_RESET, the return err is -EBUSY for padata_do_parallel, and it won't call aead_request_complete(). Therefore, test_aead_vec_cfg will hung at wait_for_completion(&wait->completion), which will cause hungtask. The problem comes as following: (padata_do_parallel) | rcu_read_lock_bh(); | err = -EINVAL; | (padata_replace) | pinst->flags |= PADATA_RESET; err = -EBUSY | if (pinst->flags & PADATA_RESET) | rcu_read_unlock_bh() | return err In order to resolve the problem, we replace the return err -EBUSY with -EAGAIN, which means parallel_data is changing, and the caller should call it again. v3: remove retry and just change the return err. v2: introduce padata_try_do_parallel() in pcrypt_aead_encrypt and pcrypt_aead_decrypt to solve the hungtask. Signed-off-by: Lu Jialin <lujialin4@huawei.com> Signed-off-by: Guo Zihua <guozihua@huawei.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-11-28 16:45:43 +00:00
..
bpf	bpf: Address KCSAN report on bpf_lru_list	2023-08-11 11:33:48 +02:00
cgroup	cgroup: Remove duplicates in cgroup v1 tasks file	2023-10-25 11:13:30 +02:00
configs	ANDROID: binder: add hwbinder,vndbinder to BINDER_DEVICES.	2017-08-22 18:43:23 -07:00
debug	kdb: Make memory allocations more robust	2021-03-03 18:22:36 +01:00
events	perf/core: Fix potential NULL deref	2023-11-08 11:21:06 +01:00
gcov	gcov: add support for checksum field	2023-01-18 09:26:35 +01:00
irq	irqdomain: Drop bogus fwspec-mapping error handling	2023-03-11 16:26:47 +01:00
livepatch	livepatch: fix race between fork and KLP transition	2022-10-26 13:16:57 +02:00
locking	locking/ww_mutex/test: Fix potential workqueue corruption	2023-11-28 16:45:42 +00:00
power	PM: hibernate: Fix mistake in kerneldoc comment	2023-01-18 09:26:09 +01:00
printk	printk: fix return value of printk.devkmsg __setup handler	2022-04-20 09:08:15 +02:00
rcu	rcu: Suppress smp_processor_id() complaint in synchronize_rcu_expedited_wait()	2023-03-11 16:26:41 +01:00
sched	sched/fair: Don't balance task to its current running CPU	2023-08-11 11:33:48 +02:00
time	posix-timers: Ensure timer ID search-loop limit is valid	2023-08-11 11:33:48 +02:00
trace	tracing: relax trace_event_eval_update() execution with cond_resched()	2023-10-25 11:13:32 +02:00
.gitignore
acct.c	acct: fix potential integer overflow in encode_comp_t()	2023-01-18 09:26:30 +01:00
async.c	treewide: Remove uninitialized_var() usage	2023-08-11 11:33:32 +02:00
audit_fsnotify.c	audit: fix potential double free on error path from fsnotify_add_inode_mark	2022-09-05 10:25:02 +02:00
audit_tree.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
audit_watch.c	audit: CONFIG_CHANGE don't log internal bookkeeping as an event	2020-10-01 13:12:33 +02:00
audit.c	treewide: Remove uninitialized_var() usage	2023-08-11 11:33:32 +02:00
audit.h	audit: fix a net reference leak in audit_list_rules_send()	2020-06-20 10:25:10 +02:00
auditfilter.c	audit: fix a net reference leak in audit_list_rules_send()	2020-06-20 10:25:10 +02:00
auditsc.c	audit: fix possible soft lockup in __audit_inode_child()	2023-09-23 10:46:56 +02:00
backtracetest.c
bounds.c	kbuild: fix kernel/bounds.c 'W=1' warning	2018-11-13 11:15:08 -08:00
capability.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
compat.c	sched_getaffinity: don't assume 'cpumask_size()' is fully initialized	2023-04-05 11:14:19 +02:00
configs.c
context_tracking.c
cpu_pm.c	kernel/cpu_pm: Fix uninitted local in cpu_pm	2020-06-20 10:25:19 +02:00
cpu.c	random: clear fast pool, crng, and batches in cpuhp bring up	2022-06-25 11:46:35 +02:00
crash_core.c	kdump: write correct address of mem_section into vmcoreinfo	2018-01-17 09:45:27 +01:00
crash_dump.c
cred.c	memcg: account security cred as well to kmemcg	2020-01-09 10:17:54 +01:00
delayacct.c	delayacct: Use raw_spinlocks	2018-08-03 07:50:38 +02:00
dma.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
exec_domain.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
exit.c	treewide: Remove uninitialized_var() usage	2023-08-11 11:33:32 +02:00
extable.c	kernel/extable.c: use address-of operator on section symbols	2023-06-09 10:22:53 +02:00
fork.c	mm/hugetlb: initialize hugetlb_usage in mm_init	2021-09-22 11:45:32 +02:00
freezer.c
futex.c	treewide: Remove uninitialized_var() usage	2023-08-11 11:33:32 +02:00
groups.c	kernel: make groups_sort calling a responsibility group_info allocators	2017-12-20 10:10:18 +01:00
hung_task.c	kernel: hung_task.c: disable on suspend	2019-04-20 09:15:05 +02:00
irq_work.c
jump_label.c	sched/core: Fix cpu.max vs. cpuhotplug deadlock	2018-12-05 19:41:17 +01:00
kallsyms.c	kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol	2019-09-21 07:15:38 +02:00
kcmp.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: ensure irq code sees a valid area	2018-08-03 07:50:22 +02:00
kexec_core.c	kexec: fix a memory leak in crash_shrink_memory()	2023-08-11 11:33:34 +02:00
kexec_file.c	kexec_file: drop weak attribute from arch_kexec_apply_relocations[_add]	2022-07-02 16:18:11 +02:00
kexec_internal.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
kexec.c	kdump: protect vmcoreinfo data under the crash memory	2017-07-12 16:26:00 -07:00
kmod.c	kmod: make request_module() return an error when autoloading is disabled	2020-04-24 08:00:44 +02:00
kprobes.c	x86/kprobes: Fix arch_check_optimized_kprobe check within optimized_kprobe range	2023-03-11 16:26:46 +01:00
ksysfs.c	kexec: move vmcoreinfo out of the kernel's .bss section	2017-07-12 16:25:59 -07:00
kthread.c	kthread: prevent deadlock when kthread_mod_delayed_work() races with kthread_cancel_delayed_work_sync()	2021-07-11 12:48:13 +02:00
latencytop.c
Makefile	elfcore: fix building with clang	2021-02-10 09:12:08 +01:00
memremap.c	mm, devm_memremap_pages: kill mapping "System RAM" support	2019-01-13 10:01:02 +01:00
module_signing.c
module-internal.h
module.c	modules: only allow symbol_get of EXPORT_SYMBOL_GPL modules	2023-09-23 10:46:52 +02:00
notifier.c	x86/mm: split vmalloc_sync_all()	2020-04-02 16:34:20 +02:00
nsproxy.c
padata.c	crypto: pcrypt - Fix hungtask for PADATA_RESET	2023-11-28 16:45:43 +00:00
panic.c	exit: Use READ_ONCE() for all oops/warn limit reads	2023-02-06 07:46:35 +01:00
params.c	kernel/params.c: improve STANDARD_PARAM_DEF readability	2017-10-03 17:54:26 -07:00
pid_namespace.c	memcg: enable accounting for pids in nested pid namespaces	2021-09-22 11:45:32 +02:00
pid.c	pids: make task_tgid_nr_ns() safe	2017-08-21 12:47:31 -07:00
profile.c	profiling: fix shift too large makes kernel panic	2022-08-25 11:11:24 +02:00
ptrace.c	ptrace: Reimplement PTRACE_KILL by always sending SIGKILL	2022-06-14 16:53:43 +02:00
range.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
reboot.c	reboot: fix overflow parsing reboot cpu number	2020-11-18 18:28:02 +01:00
relay.c	kernel/relay.c: fix memleak on destroy relay channel	2020-08-26 10:29:54 +02:00
resource.c	resource: fix integer overflow at reallocation	2018-04-24 09:36:22 +02:00
seccomp.c	seccomp: Invalidate seccomp mode to catch death failures	2022-02-16 12:44:52 +01:00
signal.c	signal handling: don't use BUG_ON() for debugging	2022-07-21 20:42:47 +02:00
smp.c	smp: Fix offline cpu check in flush_smp_call_function_queue()	2022-04-20 09:08:33 +02:00
smpboot.c	kthread: Extract KTHREAD_IS_PER_CPU	2021-02-07 14:47:41 +01:00
smpboot.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
softirq.c	Mark HI and TASKLET softirq synchronous	2018-08-15 18:12:47 +02:00
stacktrace.c
stop_machine.c	stop_machine: Atomically queue and wake stopper threads	2018-09-05 09:26:36 +02:00
sys_ni.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
sys.c	prlimit: do_prlimit needs to have a speculation check	2023-01-24 07:05:18 +01:00
sysctl_binary.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
sysctl.c	proc: proc_skip_spaces() shouldn't think it is working on C strings	2022-12-08 11:16:33 +01:00
task_work.c	locking/barriers: Convert users of lockless_dereference() to READ_ONCE()	2017-12-25 14:26:21 +01:00
taskstats.c	taskstats: fix data-race	2020-01-09 10:17:53 +01:00
test_kprobes.c
torture.c	torture: Fix typo suppressing CPU-hotplug statistics	2017-07-25 13:04:45 -07:00
tracepoint.c	tracepoint: Do not fail unregistering a probe due to memory failure	2021-03-03 18:22:47 +01:00
tsacct.c	taskstats: Cleanup the use of task->exit_code	2022-02-23 11:57:34 +01:00
ucount.c
uid16.c	kernel: make groups_sort calling a responsibility group_info allocators	2017-12-20 10:10:18 +01:00
umh.c	usermodehelper: reset umask to default before executing user process	2020-10-14 09:51:10 +02:00
up.c	smp: Fix smp_call_function_single_async prototype	2021-05-22 10:57:35 +02:00
user_namespace.c	userns: move user access out of the mutex	2018-09-09 19:56:00 +02:00
user-return-notifier.c
user.c
utsname_sysctl.c	sys: don't hold uts_sem while accessing userspace memory	2018-09-09 19:56:00 +02:00
utsname.c
watchdog_hld.c	watchdog/perf: more properly prevent false positives with turbo modes	2023-08-11 11:33:34 +02:00
watchdog.c	watchdog/softlockup: Enforce that timestamp is valid on boot	2020-02-28 16:36:05 +01:00
workqueue_internal.h	Merge branch 'for-4.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	2017-11-06 12:26:49 -08:00
workqueue.c	workqueue: Override implicit ordered attribute in workqueue_apply_unbound_cpumask()	2023-10-25 11:13:30 +02:00