rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5850/1:b..l P5496/1:b..l P5846/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=58817, q=1330 ncpus=2)
task:syz-executor state:R running task stack:21352 pid:5846 tgid:5846 ppid:1 task_flags:0x40054c flags:0x10080003
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:7113
preempt_schedule+0xae/0xc0 kernel/sched/core.c:7137
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_read_unlock include/linux/rwlock_api_smp.h:233 [inline]
_raw_read_unlock+0x3f/0x50 kernel/locking/spinlock.c:260
zap_pid_ns_processes+0x2c4/0x5f0 kernel/pid_namespace.c:233
find_child_reaper kernel/exit.c:623 [inline]
forget_original_parent kernel/exit.c:707 [inline]
exit_notify kernel/exit.c:744 [inline]
do_exit+0x1ee7/0x2300 kernel/exit.c:978
do_group_exit+0x21c/0x2d0 kernel/exit.c:1107
get_signal+0x1285/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x72/0x130 kernel/entry/common.c:40
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
__do_fast_syscall_32+0x1f4/0x2b0 arch/x86/entry/syscall_32.c:309
do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:331
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf703d539
RSP: 002b:00000000f752fcb0 EFLAGS: 00000206 ORIG_RAX: 000000000000010b
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 00000000f752fce4 RSI: 00000000f752fcdc RDI: 00000000f752fce4
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
task:dhcpcd state:R running task stack:20040 pid:5496 tgid:5496 ppid:5495 task_flags:0x400140 flags:0x00080001
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7256
irqentry_exit+0x6f/0x90 kernel/entry/common.c:211
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__preempt_count_add kernel/rcu/tree.c:747 [inline]
RIP: 0010:rcu_is_watching+0x8/0xb0 kernel/rcu/tree.c:750
Code: c2 1b 03 eb cc 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 <53> 65 ff 05 10 21 c8 10 e8 db 6b a0 09 89 c3 83 f8 08 73 65 49 bf
RSP: 0018:ffffc900039af760 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffc900039af801 RCX: ffff88802cb49e40
RDX: ffffffff908e7a01 RSI: 0000000000000000 RDI: ffffc900039af850
RBP: dffffc0000000000 R08: ffffc900039af8a7 R09: 0000000000000000
R10: ffffc900039af898 R11: fffff52000735f15 R12: ffffc900039afee0
R13: ffffc900039a8000 R14: ffffc900039af848 R15: ffffffff81738c45
rcu_read_unlock include/linux/rcupdate.h:895 [inline]
class_rcu_destructor include/linux/rcupdate.h:1195 [inline]
unwind_next_frame+0x1965/0x2390 arch/x86/kernel/unwind_orc.c:680
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
save_stack+0xf5/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:311
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2901
__slab_free+0x2e7/0x390 mm/slub.c:5970
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:352
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4978 [inline]
slab_alloc_node mm/slub.c:5288 [inline]
kmem_cache_alloc_noprof+0x367/0x6e0 mm/slub.c:5295
alloc_empty_file+0x55/0x1d0 fs/file_table.c:237
alloc_file fs/file_table.c:354 [inline]
alloc_file_pseudo+0x13d/0x210 fs/file_table.c:383
sock_alloc_file+0xb8/0x2e0 net/socket.c:483
__sys_socketpair+0x2db/0x560 net/socket.c:1834
__do_sys_socketpair net/socket.c:1863 [inline]
__se_sys_socketpair net/socket.c:1860 [inline]
__x64_sys_socketpair+0x9b/0xb0 net/socket.c:1860
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdb451a473a
RSP: 002b:00007ffc508f25d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 000055ac4b9bb690 RCX: 00007fdb451a473a
RDX: 0000000000000000 RSI: 0000000000080805 RDI: 0000000000000001
RBP: 00007ffc50912a00 R08: 0000000000000000 R09: 0000000000000001
R10: 00007ffc508f25f0 R11: 0000000000000246 R12: 00007ffc508f25f0
R13: 0000000000000001 R14: 0000000000000000 R15: 000055ac43893ac0
task:syz-executor state:R running task stack:21352 pid:5850 tgid:5850 ppid:5831 task_flags:0x400140 flags:0x10080001
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7256
irqentry_exit+0x6f/0x90 kernel/entry/common.c:211
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5872
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 5b 1d d1 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc900041af158 EFLAGS: 00000206
RAX: 80bb3d9b14a21a00 RBX: 0000000000000000 RCX: 80bb3d9b14a21a00
RDX: 0000000000000000 RSI: ffffffff8d8f55ca RDI: ffffffff8bbf08e0
RBP: ffffffff81738c45 R08: 0000000000000000 R09: ffffffff81738c45
R10: ffffc900041af318 R11: ffffffff81ac2e10 R12: 0000000000000002
R13: ffffffff8df3d6e0 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:867 [inline]
class_rcu_constructor include/linux/rcupdate.h:1195 [inline]
unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
save_stack+0xf5/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:311
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1394 [inline]
__free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2901
__slab_free+0x2e7/0x390 mm/slub.c:5970
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:352
kasan_slab_alloc include/linux/kasan.h:252 [inline]
slab_post_alloc_hook mm/slub.c:4978 [inline]
slab_alloc_node mm/slub.c:5288 [inline]
__do_kmalloc_node mm/slub.c:5649 [inline]
__kvmalloc_node_noprof+0x577/0x910 mm/slub.c:7112
xt_alloc_table_info+0x40/0xb0 net/netfilter/x_tables.c:1193
translate_compat_table+0xc94/0x2580 net/ipv4/netfilter/ip_tables.c:1429
compat_do_replace net/ipv4/netfilter/ip_tables.c:1525 [inline]
do_ipt_set_ctl+0x9ad/0xcd0 net/ipv4/netfilter/ip_tables.c:1632
nf_setsockopt+0x26f/0x290 net/netfilter/nf_sockopt.c:101
do_sock_setsockopt+0x17c/0x1b0 net/socket.c:2360
__sys_setsockopt+0xc3/0x130 net/socket.c:2385
__do_compat_sys_socketcall net/compat.c:491 [inline]
__se_compat_sys_socketcall net/compat.c:423 [inline]
__ia32_compat_sys_socketcall+0x2b4/0x9c0 net/compat.c:423
do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
__do_fast_syscall_32+0xb6/0x2b0 arch/x86/entry/syscall_32.c:306
do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:331
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7fb2539
RSP: 002b:00000000f759f660 EFLAGS: 00000206 ORIG_RAX: 0000000000000066
RAX: ffffffffffffffda RBX: 000000000000000e RCX: 00000000f759f688
RDX: 00000000f744c1b4 RSI: 00000000f7446ff4 RDI: 0000000000000066
RBP: 00000000f759f688 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000