gaoxiang17 a0212978af pid: Add a judgment for ns null in pid_nr_ns ... [ Upstream commit 006568ab4c ] __task_pid_nr_ns ns = task_active_pid_ns(current); pid_nr_ns(rcu_dereference(*task_pid_ptr(task, type)), ns); if (pid && ns->level <= pid->level) { Sometimes null is returned for task_active_pid_ns. Then it will trigger kernel panic in pid_nr_ns. For example: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000058 Mem abort info: ESR = 0x0000000096000007 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x07: level 3 translation fault Data abort info: ISV = 0, ISS = 0x00000007, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 user pgtable: 4k pages, 39-bit VAs, pgdp=00000002175aa000 [0000000000000058] pgd=08000002175ab003, p4d=08000002175ab003, pud=08000002175ab003, pmd=08000002175be003, pte=0000000000000000 pstate: 834000c5 (Nzcv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __task_pid_nr_ns+0x74/0xd0 lr : __task_pid_nr_ns+0x24/0xd0 sp : ffffffc08001bd10 x29: ffffffc08001bd10 x28: ffffffd4422b2000 x27: 0000000000000001 x26: ffffffd442821168 x25: ffffffd442821000 x24: 00000f89492eab31 x23: 00000000000000c0 x22: ffffff806f5693c0 x21: ffffff806f5693c0 x20: 0000000000000001 x19: 0000000000000000 x18: 0000000000000000 x17: 00000000529c6ef0 x16: 00000000529c6ef0 x15: 00000000023a1adc x14: 0000000000000003 x13: 00000000007ef6d8 x12: 001167c391c78800 x11: 00ffffffffffffff x10: 0000000000000000 x9 : 0000000000000001 x8 : ffffff80816fa3c0 x7 : 0000000000000000 x6 : 49534d702d535449 x5 : ffffffc080c4c2c0 x4 : ffffffd43ee128c8 x3 : ffffffd43ee124dc x2 : 0000000000000000 x1 : 0000000000000001 x0 : ffffff806f5693c0 Call trace: __task_pid_nr_ns+0x74/0xd0 ... __handle_irq_event_percpu+0xd4/0x284 handle_irq_event+0x48/0xb0 handle_fasteoi_irq+0x160/0x2d8 generic_handle_domain_irq+0x44/0x60 gic_handle_irq+0x4c/0x114 call_on_irq_stack+0x3c/0x74 do_interrupt_handler+0x4c/0x84 el1_interrupt+0x34/0x58 el1h_64_irq_handler+0x18/0x24 el1h_64_irq+0x68/0x6c account_kernel_stack+0x60/0x144 exit_task_stack_account+0x1c/0x80 do_exit+0x7e4/0xaf8 ... get_signal+0x7bc/0x8d8 do_notify_resume+0x128/0x828 el0_svc+0x6c/0x70 el0t_64_sync_handler+0x68/0xbc el0t_64_sync+0x1a8/0x1ac Code: 35fffe54 911a02a8 f9400108 b4000128 (b9405a69) ---[ end trace 0000000000000000 ]--- Kernel panic - not syncing: Oops: Fatal exception in interrupt Signed-off-by: gaoxiang17 <gaoxiang17@xiaomi.com> Link: https://lore.kernel.org/20250802022123.3536934-1-gxxa03070307@gmail.com Reviewed-by: Baoquan He <bhe@redhat.com> Signed-off-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2025-10-19 16:37:43 +02:00
..
bpf	bpf: Avoid RCU context warning when unpinning htab with internal structs	2025-10-19 16:37:15 +02:00
cgroup	cpuset: fix failure to enable isolated partition when containing isolcpus	2025-10-15 12:03:18 +02:00
configs	configs/hardening: Enable CONFIG_INIT_ON_FREE_DEFAULT_ON	2025-07-21 21:41:57 -07:00
debug
dma	dma-debug: don't enforce dma mapping check on noncoherent allocations	2025-09-02 10:18:16 +02:00
entry	ARM:	2025-07-30 17:14:01 -07:00
events	uprobes: uprobe_warn should use passed task	2025-10-15 12:03:16 +02:00
futex	futex: Prevent use-after-free during requeue-PI	2025-09-20 17:40:42 +02:00
gcov	kbuild: require gcc-8 and binutils-2.30	2025-04-30 21:53:35 +02:00
irq	genirq/test: Ensure CPU 1 is online for hotplug test	2025-10-15 12:03:24 +02:00
kcsan	kcsan: test: Initialize dummy variable	2025-07-23 08:51:32 +02:00
livepatch	sched,livepatch: Untangle cond_resched() and live-patching	2025-05-14 13:16:24 +02:00
locking	- Make sure sanity checks down in the mutex lock path happen on the correct	2025-08-17 05:57:47 -07:00
module	Significant patch series in this pull request:	2025-08-05 16:02:07 +03:00
power	PM: hibernate: Restrict GFP mask in power_down()	2025-10-19 16:37:29 +02:00
printk	printk changes for 6.17	2025-08-04 10:54:36 -07:00
rcu	srcu/tiny: Remove preempt_disable/enable() in srcu_gp_start_if_needed()	2025-10-15 12:03:58 +02:00
sched	sched/deadline: Fix race in push_dl_task()	2025-10-19 16:37:30 +02:00
time	tick: Do not set device to detached state in tick_shutdown()	2025-10-15 12:03:26 +02:00
trace	tracing: Stop fortify-string from warning in tracing_mark_raw_write()	2025-10-15 12:04:18 +02:00
unwind	unwind: Finish up unwind when a task exits	2025-07-31 10:20:11 -04:00
.gitignore	kheaders: rebuild kheaders_data.tar.xz when a file is modified within a minute	2025-06-24 20:30:37 +09:00
acct.c
async.c
audit_fsnotify.c
audit_tree.c	replace collect_mounts()/drop_collected_mounts() with a safer variant	2025-06-23 14:01:49 -04:00
audit_watch.c	fs: add kern_path_locked_negative()	2025-04-15 11:32:34 +02:00
audit.c	audit: record AUDIT_ANOM_* events regardless of presence of rules	2025-04-11 14:14:41 -04:00
audit.h	audit,module: restore audit logging in load failure case	2025-06-16 17:00:06 -04:00
auditfilter.c	audit: fix out-of-bounds read in audit_compare_dname_path()	2025-09-03 16:46:23 -04:00
auditsc.c	audit,module: restore audit logging in load failure case	2025-06-16 17:00:06 -04:00
backtracetest.c
bounds.c
capability.c
cfi.c	cfi: Move BPF CFI types and helpers to generic code	2025-07-31 18:23:53 -07:00
compat.c
configs.c
context_tracking.c
cpu_pm.c
cpu.c	cpu: Remove obsolete comment from takedown_cpu()	2025-08-06 22:48:12 +02:00
crash_core.c	kdump: wait for DMA to finish when using CMA	2025-07-19 19:08:23 -07:00
crash_dump_dm_crypt.c	crash_dump: retrieve dm crypt keys in kdump kernel	2025-05-21 10:48:21 -07:00
crash_reserve.c	kdump: implement reserve_crashkernel_cma	2025-07-19 19:08:23 -07:00
cred.c
delayacct.c	delayacct: remove redundant code and adjust indentation	2025-05-27 19:40:33 -07:00
dma.c
elfcorehdr.c
exec_domain.c
exit.c	Significant patch series in this pull request:	2025-08-03 16:23:09 -07:00
exit.h
extable.c
fail_function.c
fork.c	copy_sighand: Handle architectures where sizeof(unsigned long) < sizeof(u64)	2025-10-19 16:37:24 +02:00
freezer.c	sched,freezer: Remove unnecessary warning in __thaw_task	2025-07-17 07:56:50 -10:00
gen_kheaders.sh	kheaders: make it possible to override TAR	2025-08-06 10:23:36 +09:00
groups.c
hung_task.c	hung_task: extend hung task blocker tracking to rwsems	2025-07-19 19:08:26 -07:00
iomem.c
irq_work.c
jump_label.c
kallsyms_internal.h
kallsyms_selftest.c
kallsyms_selftest.h
kallsyms.c	bpf: Clean up individual BTF_ID code	2025-07-16 18:34:42 -07:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.kexec	kho: mm: don't allow deferred struct page with KHO	2025-08-19 16:35:53 -07:00
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: fix typo in comment of kcov_fault_in_area	2025-07-09 22:57:52 -07:00
kexec_core.c	Significant patch series in this pull request:	2025-08-03 16:23:09 -07:00
kexec_elf.c
kexec_file.c	Significant patch series in this pull request:	2025-08-03 16:23:09 -07:00
kexec_handover.c	kho: only fill kimage if KHO is finalized	2025-10-19 16:37:28 +02:00
kexec_internal.h	kexec: enable CMA based contiguous allocation	2025-08-02 12:01:38 -07:00
kexec.c	kexec: enable CMA based contiguous allocation	2025-08-02 12:01:38 -07:00
kheaders.c
kprobes.c	kprobes: Add missing kerneldoc for __get_insn_slot	2025-07-15 18:45:34 +09:00
kstack_erase.c	stackleak: Rename stackleak_track_stack to __sanitizer_cov_stack_depth	2025-07-21 21:40:39 -07:00
ksyms_common.c
ksysfs.c
kthread.c	ipvs: Fix estimator kthreads preferred affinity	2025-08-13 08:34:33 +02:00
latencytop.c
Makefile	Kbuild updates for v6.17	2025-08-06 07:32:52 +03:00
module_signature.c
notifier.c
nsproxy.c	kernel/nsproxy: remove unnecessary guards	2025-05-09 13:13:54 +02:00
padata.c	padata: Reset next CPU when reorder sequence wraps around	2025-10-19 16:37:29 +02:00
panic.c	Significant patch series in this pull request:	2025-08-03 16:23:09 -07:00
params.c	params: Replace deprecated strcpy() with strscpy() and memcpy()	2025-08-16 21:47:25 +02:00
pid_namespace.c
pid_sysctl.h
pid.c	pid: Add a judgment for ns null in pid_nr_ns	2025-10-19 16:37:43 +02:00
profile.c
ptrace.c	ptrace: introduce PTRACE_SET_SYSCALL_INFO request	2025-05-11 17:48:15 -07:00
range.c
reboot.c
regset.c
relay.c	relayfs: support a counter tracking if data is too big to write	2025-07-09 22:57:52 -07:00
resource_kunit.c
resource.c	resource: fix false warning in __request_region()	2025-07-24 17:57:59 -07:00
rseq.c	rseq: Protect event mask against membarrier IPI	2025-10-19 16:36:59 +02:00
scftorture.c
scs.c
seccomp.c	seccomp: Fix a race with WAIT_KILLABLE_RECV if the tracer replies too fast	2025-10-15 12:03:14 +02:00
signal.c	signal: Fix memory leak for PIDFD_SELF* sentinels	2025-08-19 13:51:28 +02:00
smp.c	smp: Fix up and expand the smp_call_function_many() kerneldoc	2025-10-15 12:03:36 +02:00
smpboot.c	sched/smp: Use the SMP version of idle_thread_set_boot_cpu()	2025-06-13 08:47:20 +02:00
smpboot.h
softirq.c
stacktrace.c
static_call_inline.c
static_call.c
stop_machine.c	sched/core: Fix migrate_swap() vs. hotplug	2025-07-01 15:02:03 +02:00
sys_ni.c
sys.c	kernel/sys.c: fix the racy usage of task_lock(tsk->group_leader) in sys_prlimit64() paths	2025-10-19 16:37:28 +02:00
sysctl-test.c	sysctl: move u8 register test to lib/test_sysctl.c	2025-04-14 14:13:41 +02:00
sysctl.c	sysctl: rename kern_table -> sysctl_subsys_table	2025-07-23 11:56:02 +02:00
task_work.c
taskstats.c
torture.c
tracepoint.c
tsacct.c
ucount.c	ucount: use atomic_long_try_cmpxchg() in atomic_long_inc_below()	2025-08-02 12:01:38 -07:00
uid16.c
uid16.h
umh.c
up.c
user_namespace.c
user-return-notifier.c
user.c
utsname_sysctl.c
utsname.c
vhost_task.c	vhost: Take a reference on the task in struct vhost_task.	2025-09-21 17:44:20 -04:00
vmcore_info.c	crash: export PAGE_UNACCEPTED_MAPCOUNT_VALUE to vmcoreinfo	2025-05-11 17:54:04 -07:00
watch_queue.c
watchdog_buddy.c	watchdog: fix opencoded cpumask_next_wrap() in watchdog_next_cpu()	2025-07-31 11:28:03 -04:00
watchdog_perf.c	watchdog/perf: Provide function for adjusting the event period	2025-07-04 13:17:30 +01:00
watchdog.c	kernel/watchdog: add /sys/kernel/{hard,soft}lockup_count	2025-05-21 10:48:22 -07:00
workqueue_internal.h
workqueue.c	workqueue: Changes for v6.17	2025-07-31 15:40:22 -07:00