rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P27942/1:b.el P27945/1:b..l P19943/1:b..l P4978/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=152889, q=457 ncpus=2)
task:udevd state:R running task stack:23640 pid:4978 tgid:4978 ppid:1 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7189
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:476 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x1fe/0x790 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x5e/0x370 kernel/locking/lockdep.c:5872
Code: 05 bb 5d 26 12 83 f8 07 0f 87 d9 02 00 00 48 0f a3 05 c6 36 f3 0e 0f 82 a4 02 00 00 8b 35 4e 6a f3 0e 85 f6 0f 85 bf 00 00 00 <48> 8b 44 24 30 65 48 2b 05 5d 5d 26 12 0f 85 ed 02 00 00 48 83 c4
RSP: 0018:ffffc900049cf948 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8defba11 RDI: ffffffff8c1c3780
RBP: ffffffff8e7e54e0 R08: 0000000086db7919 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:838 [inline]
class_rcu_constructor include/linux/rcupdate.h:1181 [inline]
unwind_next_frame+0xd1/0x2090 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2689 [inline]
slab_free mm/slub.c:6250 [inline]
kmem_cache_free+0x127/0x6c0 mm/slub.c:6377
free_filename fs/namei.c:147 [inline]
putname+0xb1/0x110 fs/namei.c:306
class_filename_destructor include/linux/fs.h:2553 [inline]
class_filename_flags_destructor include/linux/fs.h:2555 [inline]
do_readlinkat+0x1f1/0x370 fs/stat.c:569
__do_sys_readlink fs/stat.c:605 [inline]
__se_sys_readlink fs/stat.c:602 [inline]
__x64_sys_readlink+0x78/0xc0 fs/stat.c:602
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f03257153a7
RSP: 002b:00007ffcf69dc9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 00007ffcf69dd240 RCX: 00007f03257153a7
RDX: 0000000000000400 RSI: 00007ffcf69dce00 RDI: 00007ffcf69dca00
RBP: 0000000000000200 R08: 000055e26a19cc29 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00007ffcf69dca00
R13: 00007ffcf69dce00 R14: 0000000000000000 R15: 00007ffcf69dd750
task:syz-executor state:R running task stack:24024 pid:19943 tgid:19943 ppid:19917 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7189
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:476 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x1fe/0x790 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:unwind_next_frame+0x144b/0x2090 arch/x86/kernel/unwind_orc.c:532
Code: 12 00 0f 85 23 ef ff ff 4c 89 ef c6 05 9d 40 59 12 01 e8 e8 e8 ff ff e9 0f ef ff ff 48 b8 00 00 00 00 00 fc ff df 48 8b 14 24 <48> c1 ea 03 80 3c 02 00 0f 85 a6 08 00 00 48 89 c8 4d 8b 7d 38 48
RSP: 0018:ffffc90004c3f280 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffffff918641e0
RDX: ffffc90004c3f328 RSI: 0000000000000001 RDI: ffffffff90fa57ac
RBP: ffffc90004c3f338 R08: ffffffff918641e4 R09: 0000000000000007
R10: 0000000000000200 R11: 00000000000180d8 R12: ffffc90004c3f340
R13: ffffc90004c3f2f0 R14: 0000000000000003 R15: 0000000000000000
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
save_stack+0x162/0x1e0 mm/page_owner.c:165
__reset_page_owner+0x84/0x190 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1402 [inline]
__free_frozen_pages+0x747/0x1040 mm/page_alloc.c:2943
___free_pages_bulk mm/kasan/shadow.c:333 [inline]
__kasan_populate_vmalloc_do mm/kasan/shadow.c:385 [inline]
__kasan_populate_vmalloc+0x164/0x210 mm/kasan/shadow.c:424
kasan_populate_vmalloc include/linux/kasan.h:580 [inline]
alloc_vmap_area+0x95d/0x2b70 mm/vmalloc.c:2123
__get_vm_area_node+0x1ca/0x330 mm/vmalloc.c:3226
__vmalloc_node_range_noprof+0x228/0x1630 mm/vmalloc.c:4024
__vmalloc_node_noprof+0xad/0xf0 mm/vmalloc.c:4124
alloc_counters net/ipv4/netfilter/ip_tables.c:799 [inline]
copy_entries_to_user net/ipv4/netfilter/ip_tables.c:821 [inline]
get_entries net/ipv4/netfilter/ip_tables.c:1022 [inline]
do_ipt_get_ctl+0x696/0xa80 net/ipv4/netfilter/ip_tables.c:1668
nf_getsockopt+0x7c/0xe0 net/netfilter/nf_sockopt.c:116
ip_getsockopt+0x192/0x1e0 net/ipv4/ip_sockglue.c:1777
tcp_getsockopt+0xa1/0x110 net/ipv4/tcp.c:4870
do_sock_getsockopt+0x50a/0x6e0 net/socket.c:2487
__sys_getsockopt+0x148/0x260 net/socket.c:2518
__do_sys_getsockopt net/socket.c:2525 [inline]
__se_sys_getsockopt net/socket.c:2522 [inline]
__x64_sys_getsockopt+0xbd/0x160 net/socket.c:2522
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f14dc79e5aa
RSP: 002b:00007ffc4a52a308 EFLAGS: 00000202 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007ffc4a52a390 RCX: 00007f14dc79e5aa
RDX: 0000000000000041 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000003 R08: 00007ffc4a52a32c R09: 0000000000000000
R10: 00007ffc4a52a390 R11: 0000000000000202 R12: 00007f14dc9ec400
R13: 00007ffc4a52a32c R14: 0000000000000000 R15: 00007f14dc9ed180
task:syz.9.5386 state:R running task stack:26936 pid:27945 tgid:27941 ppid:19935 task_flags:0x40044c flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7189
preempt_schedule_common+0x42/0xc0 kernel/sched/core.c:7370
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:169 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:190
spin_unlock include/linux/spinlock.h:390 [inline]
zap_pte_range mm/memory.c:1948 [inline]
zap_pmd_range mm/memory.c:2004 [inline]
zap_pud_range mm/memory.c:2032 [inline]
zap_p4d_range mm/memory.c:2053 [inline]
__zap_vma_range+0x1791/0x4bf0 mm/memory.c:2093
unmap_vmas+0x299/0x5f0 mm/memory.c:2162
exit_mmap+0x1ef/0xa10 mm/mmap.c:1300
__mmput+0x12a/0x410 kernel/fork.c:1178
mmput+0x67/0x80 kernel/fork.c:1201
exit_mm kernel/exit.c:581 [inline]
do_exit+0x833/0x2a60 kernel/exit.c:963
do_group_exit+0xd5/0x2a0 kernel/exit.c:1117
get_signal+0x1ec7/0x21e0 kernel/signal.c:3037
arch_do_signal_or_restart+0x91/0x7a0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
exit_to_user_mode_loop+0x86/0x4a0 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
do_syscall_64+0x706/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe18419cdd9
RSP: 002b:00007fe184f740e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fe184416188 RCX: 00007fe18419cdd9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe184416188
RBP: 00007fe184416180 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe184416218 R14: 00007ffe92da9550 R15: 00007ffe92da9638
task:syz.3.5385 state:R running task stack:25928 pid:27942 tgid:27940 ppid:19261 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7189
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:476 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
irqentry_exit+0x1fe/0x790 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__sanitizer_cov_trace_pc+0x54/0x70 kernel/kcov.c:222
Code: e9 d1 f7 84 09 8b 82 cc 16 00 00 85 c0 74 f1 8b 82 a8 16 00 00 83 f8 02 75 e6 48 8b 8a b0 16 00 00 8b 92 ac 16 00 00 48 8b 01 <48> 83 c0 01 48 39 d0 73 cd 48 89 01 48 89 34 c1 e9 97 f7 84 09 0f
RSP: 0018:ffffc90004d97880 EFLAGS: 00000246
RAX: 000000000007ffff RBX: 0000000000000001 RCX: ffffc9001d802000
RDX: 0000000000080000 RSI: ffffffff89a4a271 RDI: ffff888031350000
RBP: ffff888031350000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ff88803135000000 R12: 1ffff920009b2f20
R13: ffffc90003331000 R14: ffffc90004d979d0 R15: dffffc0000000000
bpf_test_run+0x2e1/0xa40 net/bpf/test_run.c:416
bpf_prog_test_run_xdp+0x8ab/0x1670 net/bpf/test_run.c:1432
bpf_prog_test_run kernel/bpf/syscall.c:4742 [inline]
__sys_bpf+0x1725/0x4b90 kernel/bpf/syscall.c:6266
__do_sys_bpf kernel/bpf/syscall.c:6361 [inline]
__se_sys_bpf kernel/bpf/syscall.c:6359 [inline]
__x64_sys_bpf+0x7b/0xc0 kernel/bpf/syscall.c:6359
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f50e0f9cdd9
RSP: 002b:00007f50e1dde028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f50e1215fa0 RCX: 00007f50e0f9cdd9
RDX: 0000000000000050 RSI: 0000200000000c80 RDI: 000000000000000a
RBP: 00007f50e1032d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f50e1216038 R14: 00007f50e1215fa0 R15: 00007ffdf3773c88
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g152889 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=140338
rcu: rcu_preempt kthread starved for 10502 jiffies! g152889 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:I stack:27848 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x10e9/0x6820 kernel/sched/core.c:7189
__schedule_loop kernel/sched/core.c:7268 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7283
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 27948 Comm: syz.1.5387 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:lock_acquire+0x50/0x370 kernel/locking/lockdep.c:5833
Code: 26 12 4c 89 7c 24 30 4d 89 cf 66 90 65 8b 05 bb 5d 26 12 83 f8 07 0f 87 d9 02 00 00 48 0f a3 05 c6 36 f3 0e 0f 82 a4 02 00 00 <8b> 35 4e 6a f3 0e 85 f6 0f 85 bf 00 00 00 48 8b 44 24 30 65 48 2b
RSP: 0018:ffffc90000007d10 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8c1c3700 RDI: ffffffff8e1d4920
RBP: ffffffff9b3866e0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
FS: 00007fc00373d6c0(0000) GS:ffff888124373000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000240 CR3: 00000000ad6e7000 CR4: 00000000003526f0
Call Trace:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:166
debug_object_deactivate+0x135/0x3b0 lib/debugobjects.c:890
debug_hrtimer_deactivate kernel/time/hrtimer.c:490 [inline]
__run_hrtimer kernel/time/hrtimer.c:1898 [inline]
__hrtimer_run_queues+0x2f0/0xa00 kernel/time/hrtimer.c:1994
hrtimer_interrupt+0x3e5/0x940 kernel/time/hrtimer.c:2113
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
__sysvec_apic_timer_interrupt+0x10b/0x460 arch/x86/kernel/apic/apic.c:1067
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1061
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:198
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 a6 36 57 f6 48 89 df e8 7e 86 57 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 01 00 00 00 e8 75 58 47 f6 65 8b 05 fe 8e 7d 08 85 c0 74 16 5b
RSP: 0018:ffffc90005d87d78 EFLAGS: 00000246
RAX: 0000000000000006 RBX: ffffffff9b1a8118 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8df20f3b RDI: ffffffff8c1c3780
RBP: 0000000000000283 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000400000000 R12: 1ffff92000bb0fb6
R13: 000000000d374513 R14: 000000000d374513 R15: 0000000000000000
class_raw_spinlock_irqsave_destructor include/linux/spinlock.h:571 [inline]
do_settimeofday64+0x326/0x4d0 kernel/time/timekeeping.c:1584
do_sys_settimeofday64+0x1dc/0x260 kernel/time/time.c:195
__do_sys_clock_settime kernel/time/posix-timers.c:1124 [inline]
__se_sys_clock_settime kernel/time/posix-timers.c:1108 [inline]
__x64_sys_clock_settime+0x1c1/0x2a0 kernel/time/posix-timers.c:1108
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc00279cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc00373d028 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007fc002a15fa0 RCX: 00007fc00279cdd9
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000000
RBP: 00007fc002832d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc002a16038 R14: 00007fc002a15fa0 R15: 00007fffda2ff268