Andrea Righi 18853ba782 sched_ext: Track currently locked rq ...

Some kfuncs provided by sched_ext may need to operate on a struct rq,
but they can be invoked from various contexts, specifically, different
scx callbacks.

While some of these callbacks are invoked with a particular rq already
locked, others are not. This makes it impossible for a kfunc to reliably
determine whether it's safe to access a given rq, triggering potential
bugs or unsafe behaviors, see for example [1].

To address this, track the currently locked rq whenever a sched_ext
callback is invoked via SCX_CALL_OP*().

This allows kfuncs that need to operate on an arbitrary rq to retrieve
the currently locked one and apply the appropriate action as needed.

[1] https://lore.kernel.org/lkml/20250325140021.73570-1-arighi@nvidia.com/

Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrea Righi <arighi@nvidia.com>
Acked-by: Changwoo Min <changwoo@igalia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

2025-04-22 09:27:50 -10:00

..

bpf

Merge tag 'bpf_try_alloc_pages' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

2025-03-30 13:45:28 -07:00

cgroup

Merge tag 'driver-core-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2025-04-01 11:02:03 -07:00

configs

Merge tag 'mm-stable-2025-03-30-16-52' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2025-04-01 09:29:18 -07:00

debug

Merge tag 'tty-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2025-04-02 18:17:33 -07:00

dma

dma-mapping: fix missing clear bdr in check_ram_in_range_map()

2025-03-12 13:41:44 +01:00

entry

Merge tag 'objtool-core-2025-03-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-03-24 21:18:05 -07:00

events

mseal sysmap: uprobe mapping

2025-04-01 15:17:16 -07:00

futex

futex: Use a hashmask instead of hashsize

2025-02-26 16:07:59 +01:00

gcov

gcov: clang: use correct function param names

2025-01-24 22:47:27 -08:00

irq

Revert "Merge tag 'irq-msi-2025-03-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip"

2025-03-28 11:22:54 -07:00

kcsan

kcsan: Remove redundant call of kallsyms_lookup_name()

2024-10-14 16:44:56 +02:00

livepatch

Merge tag 'modules-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux

2025-03-30 15:44:36 -07:00

locking

Merge tag 'mm-nonmm-stable-2025-03-30-18-23' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2025-04-01 10:06:52 -07:00

module

Merge tag 'trace-ringbuffer-v6.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

2025-03-31 13:37:22 -07:00

power

Merge tag 'v6.15-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

2025-03-29 10:01:55 -07:00

printk

Merge tag 'printk-for-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux

2025-03-27 19:22:24 -07:00

rcu

Merge tag 'rcu-fixes-v6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux

2025-04-02 10:04:48 -07:00

sched

sched_ext: Track currently locked rq

2025-04-22 09:27:50 -10:00

time

Merge tag 'net-next-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

2025-03-26 21:48:21 -07:00

trace

Merge tag 'trace-ringbuffer-v6.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

2025-04-03 16:09:29 -07:00

.gitignore

…

acct.c

acct: block access to kernel internal filesystems

2025-02-12 12:24:16 +01:00

async.c

…

audit_fsnotify.c

…

audit_tree.c

…

audit_watch.c

VFS: change kern_path_locked() and user_path_locked_at() to never return negative dentry

2025-02-19 14:08:41 +01:00

audit.c

audit: Initialize lsmctx to avoid memory allocation error

2025-01-29 20:02:04 -05:00

audit.h

audit: change context data from secid to lsm_prop

2024-10-11 14:34:16 -04:00

auditfilter.c

audit: fix suffixed '/' filename matching

2024-12-05 19:22:38 -05:00

auditsc.c

fs: dedup handling of struct filename init and refcounts bumps

2025-03-18 15:34:27 +01:00

backtracetest.c

backtracetest: add MODULE_DESCRIPTION()

2024-06-24 22:24:55 -07:00

bounds.c

…

capability.c

capability: Remove unused has_capability

2025-03-07 22:03:09 -06:00

cfi.c

Merge tag 'modules-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux

2025-03-30 15:44:36 -07:00

compat.c

…

configs.c

…

context_tracking.c

context_tracking: Make RCU watch ct_kernel_exit_state() warning

2025-03-04 18:44:29 -08:00

cpu_pm.c

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cpu.c

Merge tag 'hyperv-next-signed-20250324' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

2025-03-25 14:47:04 -07:00

crash_core.c

crash: Use note name macros

2025-02-10 16:56:58 -08:00

crash_reserve.c

crash: remove an unused argument from reserve_crashkernel_generic()

2025-03-16 22:30:47 -07:00

cred.c

cred: remove old {override,revert}_creds() helpers

2024-12-02 11:25:09 +01:00

delayacct.c

treewide: const qualify ctl_tables where applicable

2025-01-28 13:48:37 +01:00

dma.c

…

elfcorehdr.c

…

exec_domain.c

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exit.c

exit: fix the usage of delay_group_leader->exit_code in do_notify_parent() and pidfs_exit()

2025-03-25 15:56:22 +01:00

exit.h

…

extable.c

…

fail_function.c

…

fork.c

Merge tag 'mm-nonmm-stable-2025-03-30-18-23' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2025-04-01 10:06:52 -07:00

freezer.c

sched/fair: Fix external p->on_rq users

2024-10-14 09:14:35 +02:00

gen_kheaders.sh

Merge tag 'kbuild-v6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

2025-01-31 12:07:07 -08:00

groups.c

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hung_task.c

hung_task: show the blocker task if the task is hung on mutex

2025-03-21 22:10:04 -07:00

iomem.c

mm/memremap: Pass down MEMREMAP_* flags to arch_memremap_wb()

2025-02-21 15:05:38 +01:00

irq_work.c

kasan: make kasan_record_aux_stack_noalloc() the default behaviour

2025-01-13 22:40:36 -08:00

jump_label.c

jump_label: Use RCU in all users of __module_text_address().

2025-03-10 11:54:46 +01:00

kallsyms_internal.h

kallsyms: get rid of code for absolute kallsyms

2024-07-20 16:33:21 +09:00

kallsyms_selftest.c

kallsyms: Use kthread_run_on_cpu()

2025-01-02 22:12:12 +01:00

kallsyms_selftest.h

…

kallsyms.c

kallsyms: Remove KALLSYMS_ABSOLUTE_PERCPU

2025-02-18 10:16:04 +01:00

kcmp.c

kcmp: improve performance adding an unlikely hint to task comparisons

2025-02-21 10:25:33 +01:00

Kconfig.freezer

…

Kconfig.hz

kernel: Fix "select" wording on HZ_250 description

2025-02-21 09:20:30 +01:00

Kconfig.kexec

crash, powerpc: default to CRASH_DUMP=n on PPC_BOOK3S_32

2024-11-14 22:43:48 -08:00

Kconfig.locks

…

Kconfig.preempt

sched: No PREEMPT_RT=y for all{yes,mod}config

2024-11-07 15:25:05 +01:00

kcov.c

kcov: mark in_softirq_really() as __always_inline

2024-12-30 17:59:08 -08:00

kexec_core.c

Merge tag 'mm-nonmm-stable-2025-03-30-18-23' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2025-04-01 10:06:52 -07:00

kexec_elf.c

kexec: initialize ELF lowest address to ULONG_MAX

2025-03-16 22:30:47 -07:00

kexec_file.c

crash: let arch decide usable memory range in reserved area

2025-03-16 22:30:47 -07:00

kexec_internal.h

kexec: use atomic_try_cmpxchg_acquire() in kexec_trylock()

2024-09-01 20:43:23 -07:00

kexec.c

…

kheaders.c

kheaders: Simplify attribute through __BIN_ATTR_SIMPLE_RO()

2024-12-24 09:46:49 +01:00

kprobes.c

kprobes: Use RCU in all users of __module_text_address().

2025-03-10 11:54:46 +01:00

ksyms_common.c

…

ksysfs.c

kernel/ksysfs.c: simplify bin_attribute definition

2025-01-07 16:59:15 +01:00

kthread.c

kthread: Fix return value on kzalloc() failure in kthread_affine_preferred()

2025-02-04 01:42:27 +01:00

latencytop.c

treewide: const qualify ctl_tables where applicable

2025-01-28 13:48:37 +01:00

Makefile

tracing: Disable branch profiling in noinstr code

2025-03-22 09:49:26 +01:00

module_signature.c

…

notifier.c

reboot: move reboot_notifier_list to kernel/reboot.c

2024-11-05 17:12:31 -08:00

nsproxy.c

fdget(), trivial conversions

2024-11-03 01:28:06 -05:00

padata.c

padata: switch padata_find_next() to using cpumask_next_wrap()

2025-02-24 16:37:23 -05:00

panic.c

Merge tag 'objtool-urgent-2025-04-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-04-02 10:30:10 -07:00

params.c

params: Annotate struct module_param_attrs with __counted_by()

2025-03-10 11:54:46 +01:00

pid_namespace.c

pid: Do not set pid_max in new pid namespaces

2025-03-06 10:18:36 +01:00

pid_sysctl.h

treewide: const qualify ctl_tables where applicable

2025-01-28 13:48:37 +01:00

pid.c

Merge tag 'kernel-6.15-rc1.tasklist_lock' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

2025-03-24 13:39:27 -07:00

profile.c

profiling: remove profile=sleep support

2024-08-04 13:36:28 -07:00

ptrace.c

…

range.c

…

reboot.c

Merge tag 'mm-nonmm-stable-2025-03-30-18-23' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2025-04-01 10:06:52 -07:00

regset.c

…

relay.c

relay: use kasprintf() instead of fixed buffer formatting

2025-03-21 22:10:05 -07:00

resource_kunit.c

resource, kunit: fix user-after-free in resource_test_region_intersects()

2024-10-09 12:47:19 -07:00

resource.c

resource: replace open coded variant of DEFINE_RES()

2025-03-21 22:10:05 -07:00

rseq.c

rseq: Fix segfault on registration when rseq_cs is non-zero

2025-03-06 22:26:49 +01:00

scftorture.c

scftorture: Handle NULL argument passed to scf_add_to_free_list().

2024-11-14 16:09:51 -08:00

scs.c

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seccomp.c

seccomp: avoid the lock trip seccomp_filter_release in common case

2025-02-24 11:17:10 -08:00

signal.c

Merge tag 'vfs-6.15-rc1.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

2025-04-02 16:05:21 -07:00

smp.c

Merge tag 'csd-lock.2025.01.28a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu

2025-01-28 11:34:03 -08:00

smpboot.c

…

smpboot.h

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softirq.c

lockdep: Fix wait context check on softirq for PREEMPT_RT

2025-03-25 10:46:44 +01:00

stackleak.c

treewide: const qualify ctl_tables where applicable

2025-01-28 13:48:37 +01:00

stacktrace.c

…

static_call_inline.c

Merge tag 'modules-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux

2025-03-30 15:44:36 -07:00

static_call.c

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stop_machine.c

stop-machine: Add comment for rcu_momentary_eqs()

2025-03-11 10:15:52 -07:00

sys_ni.c

Merge tag 'probes-v6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

2024-07-18 12:19:20 -07:00

sys.c

Merge tag 'timers-core-2025-03-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-03-25 10:33:23 -07:00

sysctl-test.c

treewide: const qualify ctl_tables where applicable

2025-01-28 13:48:37 +01:00

sysctl.c

Merge tag 's390-6.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

2025-03-29 11:59:43 -07:00

task_work.c

kasan: make kasan_record_aux_stack_noalloc() the default behaviour

2025-01-13 22:40:36 -08:00

taskstats.c

fdget(), more trivial conversions

2024-11-03 01:28:06 -05:00

torture.c

torture: Add get_torture_init_jiffies() for test-start time

2025-02-05 07:14:24 -08:00

tracepoint.c

tracepoint: Print the function symbol when tracepoint_debug is set

2025-03-21 15:30:10 -04:00

tsacct.c

tsacct: replace strncpy() with strscpy()

2024-07-12 16:39:53 -07:00

ucount.c

ucount: use rcuref_t for reference counting

2025-03-16 22:30:50 -07:00

uid16.c

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uid16.h

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umh.c

treewide: const qualify ctl_tables where applicable

2025-01-28 13:48:37 +01:00

up.c

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user_namespace.c

uidgid: add map_id_range_up()

2025-02-12 12:12:27 +01:00

user-return-notifier.c

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user.c

uidgid: make sure we fit into one cacheline

2024-09-12 12:16:09 +02:00

usermode_driver.c

…

utsname_sysctl.c

treewide: const qualify ctl_tables where applicable

2025-01-28 13:48:37 +01:00

utsname.c

…

vhost_task.c

vhost: return task creation error instead of NULL

2025-03-01 02:52:52 -05:00

vmcore_info.c

mm: support only one page_type per page

2024-09-03 21:15:43 -07:00

watch_queue.c

Merge tag 'vfs-6.15-rc1.pipe' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

2025-03-24 09:52:37 -07:00

watchdog_buddy.c

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watchdog_perf.c

Merge tag 'mm-nonmm-stable-2025-03-30-18-23' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2025-04-01 10:06:52 -07:00

watchdog.c

Merge tag 'timers-cleanups-2025-03-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2025-03-25 10:54:15 -07:00

workqueue_internal.h

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workqueue.c

Merge tag 'wq-for-6.14-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

2025-02-26 14:22:47 -08:00