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v5.15/base
linux-yocto/kernel
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Uladzislau Rezki (Sony) bee6329e5f rcu: Return early if callback is not specified 
[ Upstream commit 33b6a1f155d627f5bd80c7485c598ce45428f74f ]

Currently the call_rcu() API does not check whether a callback
pointer is NULL. If NULL is passed, rcu_core() will try to invoke
it, resulting in NULL pointer dereference and a kernel crash.

To prevent this and improve debuggability, this patch adds a check
for NULL and emits a kernel stack trace to help identify a faulty
caller.

Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Reviewed-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2025-07-10 15:57:47 +02:00
..
bpf bpf: Avoid __bpf_prog_ret0_warn when jit fails 2025-06-27 11:05:14 +01:00
cgroup cgroup: Fix compilation issue due to cgroup_mutex not being exported 2025-06-04 14:37:54 +02:00
configs
debug kdb: Do not assume write() callback available 2025-03-13 12:50:45 +01:00
dma dma/contiguous: avoid warning about unused size_bytes 2025-05-02 07:44:29 +02:00
entry entry: Respect changes to system call number by trace_sys_enter() 2024-04-10 16:18:46 +02:00
events perf: Fix sample vs do_exit() 2025-06-27 11:05:38 +01:00
futex futex: Don't include process MM in futex key on no-MMU 2023-11-20 11:08:13 +01:00
gcov gcov: add support for GCC 14 2024-07-05 09:14:34 +02:00
irq genirq: Make handle_enforce_irqctx() unconditionally available 2025-03-13 12:49:52 +01:00
kcsan kcsan: Turn report_filterlist_lock into a raw_spinlock 2024-12-14 19:51:35 +01:00
livepatch livepatch: Fix missing newline character in klp_resolve_symbols() 2023-11-20 11:08:25 +01:00
locking locking/lockdep: Decrease nr_unused_locks if lock unused in zap_class() 2025-05-02 07:44:03 +02:00
power PM: wakeup: Delete space in the end of string shown by pm_show_wakelocks() 2025-06-27 11:05:10 +01:00
printk printk: Fix signed integer overflow when defining LOG_BUF_LEN_MAX 2025-03-13 12:50:17 +01:00
rcu rcu: Return early if callback is not specified 2025-07-10 15:57:47 +02:00
sched cpufreq/sched: Fix the usage of CPUFREQ_NEED_UPDATE_LIMITS 2025-05-02 07:44:11 +02:00
time clocksource: Fix the CPUs' choice in the watchdog per CPU verification 2025-06-27 11:05:27 +01:00
trace ftrace: Fix UAF when lookup kallsym after ftrace disabled 2025-06-27 11:05:26 +01:00
.gitignore
acct.c acct: block access to kernel internal filesystems 2025-03-13 12:50:54 +01:00
async.c async: Introduce async_schedule_dev_nocall() 2024-02-23 08:54:25 +01:00
audit_fsnotify.c fsnotify: make allow_dups a property of the group 2024-04-10 16:19:02 +02:00
audit_tree.c fsnotify: pass flags argument to fsnotify_alloc_group() 2024-04-10 16:19:02 +02:00
audit_watch.c fsnotify: pass flags argument to fsnotify_alloc_group() 2024-04-10 16:19:02 +02:00
audit.c audit: Send netlink ACK before setting connection in auditd_set 2024-02-23 08:54:37 +01:00
audit.h audit: log AUDIT_TIME_* records only from rules 2022-04-08 14:23:06 +02:00
auditfilter.c ima: Avoid blocking in RCU read-side critical section 2024-07-18 13:07:34 +02:00
auditsc.c audit: fix possible soft lockup in __audit_inode_child() 2023-09-19 12:22:39 +02:00
backtracetest.c
bounds.c bounds: Use the right number of bits for power-of-two CONFIG_NR_CPUS 2024-05-02 16:24:50 +02:00
capability.c
cfi.c cfi: Fix __cfi_slowpath_diag RCU usage with cpuidle 2022-06-22 14:22:04 +02:00
compat.c sched_getaffinity: don't assume 'cpumask_size()' is fully initialized 2023-04-05 11:24:53 +02:00
configs.c
context_tracking.c
cpu_pm.c
cpu.c hrtimers: Handle CPU state correctly on hotplug 2025-01-23 17:16:02 +01:00
crash_core.c kernel/crash_core: suppress unknown crashkernel parameter warning 2021-12-29 12:28:49 +01:00
crash_dump.c
cred.c cred: switch to using atomic_long_t 2023-12-20 15:17:37 +01:00
delayacct.c
dma.c
exec_domain.c
exit.c perf: Fix sample vs do_exit() 2025-06-27 11:05:38 +01:00
extable.c
fail_function.c kernel/fail_function: fix memory leak with using debugfs_lookup() 2023-03-11 13:57:38 +01:00
fork.c fork: use pidfd_prepare() 2025-06-04 14:38:07 +02:00
freezer.c
gen_kheaders.sh kheaders: Ignore silly-rename files 2025-01-23 17:16:00 +01:00
groups.c
hung_task.c hung_task: move hung_task sysctl interface to hung_task.c 2025-03-13 12:49:50 +01:00
iomem.c
irq_work.c
jump_label.c
kallsyms.c kallsyms: Make kallsyms_on_each_symbol generally available 2023-12-13 18:36:45 +01:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c kcov: mark in_softirq_really() as __always_inline 2025-01-09 13:28:50 +01:00
kexec_core.c kexec: fix a memory leak in crash_shrink_memory() 2023-07-23 13:46:52 +02:00
kexec_elf.c kexec: initialize ELF lowest address to ULONG_MAX 2025-04-10 14:32:01 +02:00
kexec_file.c kexec: support purgatories with .text.hot sections 2023-06-21 15:59:14 +02:00
kexec_internal.h panic, kexec: make __crash_kexec() NMI safe 2023-04-20 12:13:57 +02:00
kexec.c kernel: kexec: copy user-array safely 2023-11-28 16:56:16 +00:00
kheaders.c kheaders: Use array declaration instead of char 2023-05-11 23:00:17 +09:00
kmod.c
kprobes.c kprobes: Fix to check symbol prefixes correctly 2024-08-19 05:45:42 +02:00
ksysfs.c kexec: turn all kexec_mutex acquisitions into trylocks 2023-04-20 12:13:57 +02:00
kthread.c kthread: unpark only parked kthread 2024-10-17 15:12:00 +02:00
latencytop.c
Makefile futex: Move to kernel/futex/ 2022-12-31 13:14:04 +01:00
module_signature.c
module_signing.c
module-internal.h
module.c NFSD: Remove svc_serv_ops::svo_module 2024-04-10 16:19:01 +02:00
notifier.c
nsproxy.c memcg: enable accounting for new namesapces and struct nsproxy 2021-09-03 09:58:12 -07:00
padata.c padata: do not leak refcount in reorder_work 2025-06-04 14:38:05 +02:00
panic.c panic: Flush kernel log buffer at the end 2024-04-13 13:01:43 +02:00
params.c module: ensure that kobject_put() is safe for module type kobjects 2025-05-18 08:20:37 +02:00
pid_namespace.c zap_pid_ns_processes: clear TIF_NOTIFY_SIGNAL along with TIF_SIGPENDING 2024-07-05 09:14:24 +02:00
pid.c
profile.c profiling: remove profile=sleep support 2024-08-19 05:45:39 +02:00
ptrace.c ptrace: Reimplement PTRACE_KILL by always sending SIGKILL 2022-06-09 10:22:29 +02:00
range.c
reboot.c kernel/reboot: emergency_restart: Set correct system_state 2023-11-28 16:56:31 +00:00
regset.c
relay.c relayfs: fix out-of-bounds access in relay_file_read 2023-05-11 23:00:18 +09:00
resource_kunit.c
resource.c resource: fix region_intersects() vs add_memory_driver_managed() 2024-10-17 15:11:59 +02:00
rseq.c rseq: Remove broken uapi field layout on 32-bit little endian 2022-04-08 14:23:10 +02:00
scftorture.c scftorture: Forgive memory-allocation failure if KASAN 2023-09-23 11:09:55 +02:00
scs.c scs: Release kasan vmalloc poison in scs_free process 2021-11-18 19:16:29 +01:00
seccomp.c seccomp: Invalidate seccomp mode to catch death failures 2022-02-16 12:56:38 +01:00
signal.c signal: Replace BUG_ON()s 2024-10-17 15:11:27 +02:00
smp.c smp: Add missing destroy_work_on_stack() call in smp_call_on_cpu() 2024-09-12 11:07:49 +02:00
smpboot.c
smpboot.h
softirq.c lockdep: Fix wait context check on softirq for PREEMPT_RT 2025-06-04 14:37:55 +02:00
stackleak.c gcc-plugins/stackleak: Use noinstr in favor of notrace 2022-02-23 12:03:07 +01:00
stacktrace.c stacktrace: move filter_irq_stacks() to kernel/stacktrace.c 2022-04-13 20:59:28 +02:00
static_call_inline.c x86/static-call: provide a way to do very early static-call updates 2024-12-19 18:07:22 +01:00
static_call.c static_call: Don't make __static_call_return0 static 2022-04-13 20:59:28 +02:00
stop_machine.c
sys_ni.c syscalls: fix compat_sys_io_pgetevents_time64 usage 2024-07-05 09:14:50 +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
sysctl.c fs: move fs stat sysctls to file_table.c 2025-03-13 12:49:50 +01:00
task_work.c task_work: Introduce task_work_cancel() again 2024-08-19 05:45:13 +02:00
taskstats.c
test_kprobes.c
torture.c torture: Fix hang during kthread shutdown phase 2023-08-30 16:18:19 +02:00
tracepoint.c
tsacct.c taskstats: Cleanup the use of task->exit_code 2022-01-27 11:05:35 +01:00
ucount.c ucounts: fix counter leak in inc_rlimit_get_ucounts() 2024-11-14 13:13:42 +01:00
uid16.c
uid16.h
umh.c
up.c
user_namespace.c ucounts: Fix systemd LimitNPROC with private users regression 2022-03-08 19:12:42 +01:00
user-return-notifier.c
user.c fs/epoll: use a per-cpu counter for user's watches count 2021-09-08 11:50:27 -07:00
usermode_driver.c
utsname_sysctl.c
utsname.c
watch_queue.c watch_queue: fix pipe accounting mismatch 2025-04-10 14:31:57 +02:00
watchdog_hld.c watchdog/perf: properly initialize the turbo mode timestamp and rearm counter 2024-08-19 05:45:20 +02:00
watchdog.c watchdog: move softlockup_panic back to early_param 2023-11-28 16:56:28 +00:00
workqueue_internal.h
workqueue.c workqueue: Improve scalability of workqueue watchdog touch 2024-09-12 11:07:52 +02:00