Levi Yun 8c1b4fea8d dma-debug: fix a possible deadlock on radix_lock ... [ Upstream commit 7543c3e3b9 ] radix_lock() shouldn't be held while holding dma_hash_entry[idx].lock otherwise, there's a possible deadlock scenario when dma debug API is called holding rq_lock(): CPU0 CPU1 CPU2 dma_free_attrs() check_unmap() add_dma_entry() __schedule() //out (A) rq_lock() get_hash_bucket() (A) dma_entry_hash check_sync() (A) radix_lock() (W) dma_entry_hash dma_entry_free() (W) radix_lock() // CPU2's one (W) rq_lock() CPU1 situation can happen when it extending radix tree and it tries to wake up kswapd via wake_all_kswapd(). CPU2 situation can happen while perf_event_task_sched_out() (i.e. dma sync operation is called while deleting perf_event using etm and etr tmc which are Arm Coresight hwtracing driver backends). To remove this possible situation, call dma_entry_free() after put_hash_bucket() in check_unmap(). Reported-by: Denis Nikitin <denik@chromium.org> Closes: https://lists.linaro.org/archives/list/coresight@lists.linaro.org/thread/2WMS7BBSF5OZYB63VT44U5YWLFP5HL6U/#RWM6MLQX5ANBTEQ2PRM7OXCBGCE6NPWU Signed-off-by: Levi Yun <yeoreum.yun@arm.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-12-14 19:54:43 +01:00
..
bpf	bpf: fix OOB devmap writes when deleting elements	2024-12-14 19:54:35 +01:00
cgroup	cgroup/bpf: only cgroup v2 can be attached by bpf programs	2024-12-14 19:53:21 +01:00
configs	Kbuild: add Rust support	2022-09-28 09:02:20 +02:00
debug	kdb: Use the passed prompt in kdb_position_cursor()	2024-08-03 08:49:47 +02:00
dma	dma-debug: fix a possible deadlock on radix_lock	2024-12-14 19:54:43 +01:00
entry	entry: Respect changes to system call number by trace_sys_enter()	2024-04-03 15:19:44 +02:00
events	uprobes: fix kernel info leak via "[uprobes]" vma	2024-10-17 15:22:05 +02:00
futex	futex: Don't include process MM in futex key on no-MMU	2023-11-20 11:51:50 +01:00
gcov	gcov: add support for GCC 14	2024-06-27 13:46:22 +02:00
irq	genirq/irqdesc: Honor caller provided affinity in alloc_desc()	2024-08-14 13:52:58 +02:00
kcsan	kcsan: Turn report_filterlist_lock into a raw_spinlock	2024-12-14 19:54:38 +01:00
livepatch	livepatch: Fix missing newline character in klp_resolve_symbols()	2023-11-20 11:52:10 +01:00
locking	lockdep: fix deadlock issue between lockdep and rcu	2024-10-17 15:21:27 +02:00
module	module: Fix KCOV-ignored file name	2024-10-17 15:21:27 +02:00
power	PM: s2idle: Make sure CPUs will wakeup directly on resume	2024-04-17 11:18:22 +02:00
printk	seqlock/latch: Provide raw_read_seqcount_latch_retry()	2024-12-14 19:53:19 +01:00
rcu	rcu-tasks: Fix access non-existent percpu rtpcp variable in rcu_tasks_need_gpcb()	2024-12-14 19:53:56 +01:00
sched	sched: psi: fix bogus pressure spikes from aggregation race	2024-10-17 15:22:06 +02:00
time	ntp: Remove invalid cast in time offset math	2024-12-14 19:54:26 +01:00
trace	tracing: Fix cmp_entries_dup() to respect sort() comparison rules	2024-12-14 19:54:32 +01:00
.gitignore
acct.c	acct: fix potential integer overflow in encode_comp_t()	2022-12-31 13:32:58 +01:00
async.c	async: Introduce async_schedule_dev_nocall()	2024-01-31 16:17:00 -08:00
audit_fsnotify.c	audit: fix potential double free on error path from fsnotify_add_inode_mark	2022-08-22 18:50:06 -04:00
audit_tree.c	audit: use fsnotify group lock helpers	2022-04-25 14:37:28 +02:00
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	audit: remove selinux_audit_rule_update() declaration	2022-09-07 11:30:15 -04:00
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	xfs: don't generate selinux audit messages for capability testing	2022-03-09 10:32:06 -08:00
cfi.c	cfi: Switch to -fsanitize=kcfi	2022-09-26 10:13:13 -07:00
compat.c	sched_getaffinity: don't assume 'cpumask_size()' is fully initialized	2023-04-06 12:10:40 +02:00
configs.c
context_tracking.c	context_tracking: Fix noinstr vs KASAN	2023-03-10 09:33:45 +01:00
cpu_pm.c	context_tracking: Take IRQ eqs entrypoints over RCU	2022-07-05 13:32:59 -07:00
cpu.c	cpu/hotplug: Fix dynstate assignment in __cpuhp_setup_state_cpuslocked()	2024-07-05 09:31:56 +02:00
crash_core.c	vmcoreinfo: add kallsyms_num_syms symbol	2022-08-28 14:02:44 -07:00
crash_dump.c
cred.c	cred: switch to using atomic_long_t	2023-12-20 17:00:20 +01:00
delayacct.c	delayacct: support re-entrance detection of thrashing accounting	2022-09-26 19:46:07 -07:00
dma.c
exec_domain.c
exit.c	mm: optimize the redundant loop of mm_update_owner_next()	2024-07-11 12:47:13 +02:00
extable.c	context_tracking: Take NMI eqs entrypoints over RCU	2022-07-05 13:32:59 -07:00
fail_function.c	kernel/fail_function: fix memory leak with using debugfs_lookup()	2023-03-11 13:55:39 +01:00
fork.c	posix-cpu-timers: Clear TICK_DEP_BIT_POSIX_TIMER on clone	2024-11-14 13:15:16 +01:00
freezer.c	freezer,sched: Rewrite core freezer logic	2022-09-07 21:53:50 +02:00
gen_kheaders.sh	kheaders: explicitly define file modes for archived headers	2024-06-27 13:46:24 +02:00
groups.c	security: Add LSM hook to setgroups() syscall	2022-07-15 18:21:49 +00:00
hung_task.c	sched: Fix more TASK_state comparisons	2022-09-30 16:50:39 +02:00
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	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	Revert "signal, x86: Delay calling signals in atomic on RT enabled kernels"	2022-03-31 10:36:55 +02:00
kcov.c	kcov: properly check for softirq context	2024-08-14 13:52:58 +02:00
kexec_core.c	kexec: fix a memory leak in crash_shrink_memory()	2023-07-19 16:21:08 +02:00
kexec_elf.c
kexec_file.c	kexec: support purgatories with .text.hot sections	2023-06-21 16:00:55 +02:00
kexec_internal.h	panic, kexec: make __crash_kexec() NMI safe	2022-09-11 21:55:06 -07:00
kexec.c	kernel: kexec: copy user-array safely	2023-11-28 17:06:57 +00:00
kheaders.c	kheaders: Use array declaration instead of char	2023-05-11 23:03:02 +09:00
kmod.c
kprobes.c	kprobes: Fix to check symbol prefixes correctly	2024-08-14 13:52:54 +02:00
ksysfs.c	kexec: turn all kexec_mutex acquisitions into trylocks	2022-09-11 21:55:06 -07:00
kthread.c	kthread: unpark only parked kthread	2024-10-17 15:22:28 +02:00
latencytop.c	latencytop: use the last element of latency_record of system	2022-09-11 21:55:12 -07:00
Makefile	kernel/numa.c: Move logging out of numa.h	2024-06-12 11:03:16 +02:00
module_signature.c
notifier.c	notifier: Add blocking/atomic_notifier_chain_register_unique_prio()	2022-05-19 19:30:30 +02:00
nsproxy.c	Revert "fs/exec: allow to unshare a time namespace on vfork+exec"	2022-09-13 10:38:43 -07:00
numa.c	kernel/numa.c: Move logging out of numa.h	2024-06-12 11:03:16 +02:00
padata.c	padata: use integer wrap around to prevent deadlock on seq_nr overflow	2024-10-17 15:21:24 +02:00
panic.c	panic: Flush kernel log buffer at the end	2024-04-13 13:04:54 +02:00
params.c	kobject: remove kset from struct kset_uevent_ops callbacks	2021-12-28 11:26:18 +01:00
pid_namespace.c	pid: Replace struct pid 1-element array with flex-array	2024-08-29 17:30:18 +02:00
pid.c	pid: Replace struct pid 1-element array with flex-array	2024-08-29 17:30:18 +02:00
profile.c	profiling: remove profile=sleep support	2024-08-14 13:52:50 +02:00
ptrace.c	freezer,sched: Rewrite core freezer logic	2022-09-07 21:53:50 +02:00
range.c
reboot.c	kernel/reboot: emergency_restart: Set correct system_state	2023-11-28 17:07:13 +00:00
regset.c
relay.c	relayfs: fix out-of-bounds access in relay_file_read	2023-05-11 23:03:03 +09:00
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: Use pr_warn_once() when deprecated/unknown ABI flags are encountered	2022-11-14 09:58:32 +01:00
scftorture.c	scftorture: Forgive memory-allocation failure if KASAN	2023-09-23 11:11:00 +02:00
scs.c	kasan, vmalloc: only tag normal vmalloc allocations	2022-03-24 19:06:48 -07:00
seccomp.c	seccomp: Add wait_killable semantic to seccomp user notifier	2022-05-03 14:11:58 -07:00
signal.c	signal: restore the override_rlimit logic	2024-11-14 13:15:18 +01:00
smp.c	smp: Add missing destroy_work_on_stack() call in smp_call_on_cpu()	2024-09-12 11:10:24 +02:00
smpboot.c	smpboot: use atomic_try_cmpxchg in cpu_wait_death and cpu_report_death	2022-09-11 21:55:10 -07:00
smpboot.h
softirq.c	softirq: Fix suspicious RCU usage in __do_softirq()	2024-06-12 11:03:01 +02:00
stackleak.c	stackleak: add on/off stack variants	2022-05-08 01:33:09 -07:00
stacktrace.c	uaccess: remove CONFIG_SET_FS	2022-02-25 09:36:06 +01:00
static_call_inline.c	static_call: Replace pointless WARN_ON() in static_call_module_notify()	2024-10-17 15:21:29 +02:00
static_call.c	static_call: Don't make __static_call_return0 static	2022-04-05 09:59:38 +02:00
stop_machine.c	Scheduler changes in this cycle were:	2022-05-24 11:11:13 -07:00
sys_ni.c	syscalls: fix compat_sys_io_pgetevents_time64 usage	2024-07-05 09:31:59 +02:00
sys.c	getrusage: use sig->stats_lock rather than lock_task_sighand()	2024-03-15 10:48:22 -04:00
sysctl-test.c	kernel/sysctl-test: use SYSCTL_{ZERO/ONE_HUNDRED} instead of i_{zero/one_hundred}	2022-09-08 16:56:45 -07:00
sysctl.c	proc: proc_skip_spaces() shouldn't think it is working on C strings	2022-12-05 12:09:06 -08:00
task_work.c	task_work: Introduce task_work_cancel() again	2024-08-03 08:49:34 +02:00
taskstats.c	genetlink: start to validate reserved header bytes	2022-08-29 12:47:15 +01:00
torture.c	torture: Fix hang during kthread shutdown phase	2023-03-10 09:34:07 +01:00
tracepoint.c	tracepoint: Optimize the critical region of mutex_lock in tracepoint_module_coming()	2022-09-26 13:01:18 -04:00
tsacct.c	taskstats: version 12 with thread group and exe info	2022-04-29 14:38:03 -07:00
ucount.c	ucounts: fix counter leak in inc_rlimit_get_ucounts()	2024-11-14 13:15:19 +01:00
uid16.c
uid16.h
umh.c	freezer,umh: Fix call_usermode_helper_exec() vs SIGKILL	2023-02-22 12:59:50 +01:00
up.c
user_namespace.c	ucounts: Split rlimit and ucount values and max values	2022-10-09 16:24:05 -07:00
user-return-notifier.c
user.c
usermode_driver.c	blob_to_mnt(): kern_unmount() is needed to undo kern_mount()	2022-05-19 23:25:47 -04:00
utsname_sysctl.c	kernel/utsname_sysctl.c: Fix hostname polling	2022-10-23 12:01:01 -07:00
utsname.c
watch_queue.c	kernel: watch_queue: copy user-array safely	2023-11-28 17:06:57 +00:00
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