rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-...!: (0 ticks this GP) idle=ccb4/1/0x4000000000000000 softirq=23056/23056 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P7782
(detected by 0, t=10506 jiffies, g=31933, q=529 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7782 Comm: syz.0.892 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
RIP: 0010:check_preemption_disabled+0x49/0x110 lib/smp_processor_id.c:55
Code: 65 8b 0d 42 10 d2 75 f7 c1 ff ff ff 7f 74 1f 65 48 8b 0c 25 28 00 00 00 48 3b 4c 24 08 0f 85 c4 00 00 00 48 83 c4 10 5b 41 5e <41> 5f 5d c3 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00
RSP: 0018:ffffc900001e0ca8 EFLAGS: 00000082
RAX: 0000000000000001 RBX: ffff88802ae99e00 RCX: b39c656a394cc900
RDX: 1ffffffff1f44a08 RSI: ffffffff8adf42c0 RDI: ffffffff8adf4280
RBP: ffffc900001e0d48 R08: ffffffff8fa25048 R09: ffffffff8fa25058
R10: ffffffff8fa25050 R11: ffffffff8fa25043 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 1ffff9200003c198
FS: 00007f7e688d26c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000002 CR3: 000000007e3e7000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
tick_irq_exit kernel/softirq.c:659 [inline]
__irq_exit_rcu+0x140/0x230 kernel/softirq.c:681
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
sysvec_irq_work+0x4f/0xc0 arch/x86/kernel/irq_work.c:17
asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:319 [inline]
RIP: 0010:handle_softirqs+0x1b7/0x910 kernel/softirq.c:584
Code: 89 7c 24 2c 0f b7 db 48 c7 c7 80 0d 8b 8a e8 e0 1f e1 08 65 66 c7 05 66 62 b4 7e 00 00 e8 91 46 39 00 fb 49 c7 c5 c0 a0 80 8c <89> 5c 24 34 b8 ff ff ff ff 0f bc 44 24 34 41 89 c6 41 ff c6 0f 84
RSP: 0018:ffffc900001e0e20 EFLAGS: 00000282
RAX: b39c656a394cc900 RBX: 0000000000000200 RCX: b39c656a394cc900
RDX: dffffc0000000000 RSI: ffffffff8a8c17a0 RDI: ffffffff8adf42e0
RBP: ffffc900001e0f30 R08: ffff8880b8f3580b R09: 1ffff110171e6b01
R10: dffffc0000000000 R11: ffffed10171e6b02 R12: dffffc0000000000
R13: ffffffff8c80a0c0 R14: ffff88802ae99e00 R15: 000000000000000a
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__rcu_read_unlock+0x51/0xd0 kernel/rcu/tree_plugin.h:425
Code: ec 03 43 0f b6 04 3c 84 c0 75 48 ff 0b 75 1d 4c 8d b7 40 04 00 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 38 84 c0 75 5f 41 83 3e 00 <75> 20 43 0f b6 04 3c 84 c0 75 3a 8b 03 3d 00 00 00 40 73 0a 5b 41
RSP: 0018:ffffc900032176d8 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff88802ae9a23c RCX: b39c656a394cc900
RDX: 0000000000000001 RSI: ffffffff8adf42c0 RDI: ffff88802ae99e00
RBP: 0000000000502dc2 R08: ffffffff8e2121af R09: 1ffffffff1c42435
R10: dffffc0000000000 R11: fffffbfff1c42436 R12: 1ffff110055d3447
R13: dffffc0000000000 R14: ffff88802ae9a240 R15: dffffc0000000000
rcu_read_unlock include/linux/rcupdate.h:823 [inline]
get_obj_cgroup_from_current mm/memcontrol.c:3025 [inline]
__memcg_kmem_charge_page+0x1d8/0x380 mm/memcontrol.c:3123
__alloc_pages+0x21e/0x4f0 mm/page_alloc.c:5675
__alloc_pages_bulk+0x491/0x910 mm/page_alloc.c:5606
vm_area_alloc_pages mm/vmalloc.c:2968 [inline]
__vmalloc_area_node mm/vmalloc.c:3071 [inline]
__vmalloc_node_range+0x706/0x1380 mm/vmalloc.c:3243
__vmalloc_node mm/vmalloc.c:3308 [inline]
__vmalloc+0x76/0x80 mm/vmalloc.c:3322
bpf_prog_alloc_no_stats+0x37/0x3a0 kernel/bpf/core.c:92
bpf_prog_alloc+0x1c/0x1b0 kernel/bpf/core.c:130
bpf_prog_load+0x7d4/0x1530 kernel/bpf/syscall.c:2597
__sys_bpf+0x5b8/0x780 kernel/bpf/syscall.c:5031
__do_sys_bpf kernel/bpf/syscall.c:5135 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5133 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5133
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7e6799de99
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:00007f7e688d2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f7e67c25fa0 RCX: 00007f7e6799de99
RDX: 0000000000000094 RSI: 0000200000000880 RDI: 0000000000000005
RBP: 00007f7e67a33eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7e67c26038 R14: 00007f7e67c25fa0 R15: 00007fffd23494c8
task:syz.0.892 state:R running task stack:24368 pid:7782 ppid:4272 flags:0x0000400c
Call Trace:
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g31933 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=1 timer-softirq=20551
rcu: rcu_preempt kthread starved for 10506 jiffies! g31933 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
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:26928 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x107f/0x4030 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2168
rcu_gp_fqs_loop+0x303/0x1350 kernel/rcu/tree.c:1706
rcu_gp_kthread+0x99/0x3b0 kernel/rcu/tree.c:1905
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7782 Comm: syz.0.892 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
RIP: 0010:llist_add_batch+0xeb/0x180 lib/llist.c:33
Code: be 08 00 00 00 e8 95 f8 be fd 48 8d 7c 24 40 be 08 00 00 00 e8 86 f8 be fd 48 8b 44 24 40 31 f6 48 8b 4c 24 18 f0 48 0f b1 0b <41> 0f 94 c5 40 0f 94 c6 bf 02 00 00 00 e8 33 d3 6d fd 45 84 ed 75
RSP: 0018:ffffc900001e08a0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff8880b8f340f8 RCX: ffff8880b8f3bbf0
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffc900001e08e0
RBP: ffffc900001e0948 R08: ffffc900001e08e7 R09: 1ffff9200003c11c
R10: dffffc0000000000 R11: fffff5200003c11d R12: 1ffff9200003c118
R13: 0000000000000000 R14: 1ffff110171e777e R15: ffff8880b8f3bbf0
FS: 00007f7e688d26c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000002 CR3: 000000007e3e7000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
llist_add include/linux/llist.h:221 [inline]
__irq_work_queue_local+0xad/0x190 kernel/irq_work.c:97
irq_work_queue_on+0x13c/0x260 kernel/irq_work.c:165
rcu_read_unlock_special+0x3c9/0x510 kernel/rcu/tree_plugin.h:678
__rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
rcu_read_unlock include/linux/rcupdate.h:823 [inline]
trace_call_bpf+0x5bb/0x6b0 kernel/trace/bpf_trace.c:137
perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:10027
perf_trace_preemptirq_template+0x268/0x320 include/trace/events/preemptirq.h:14
trace_irq_enable_rcuidle+0xd3/0x140 include/trace/events/preemptirq.h:40
trace_hardirqs_on+0x24/0x40 kernel/trace/trace_preemptirq.c:44
asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:319 [inline]
RIP: 0010:handle_softirqs+0x1b7/0x910 kernel/softirq.c:584
Code: 89 7c 24 2c 0f b7 db 48 c7 c7 80 0d 8b 8a e8 e0 1f e1 08 65 66 c7 05 66 62 b4 7e 00 00 e8 91 46 39 00 fb 49 c7 c5 c0 a0 80 8c <89> 5c 24 34 b8 ff ff ff ff 0f bc 44 24 34 41 89 c6 41 ff c6 0f 84
RSP: 0018:ffffc900001e0e20 EFLAGS: 00000282
RAX: b39c656a394cc900 RBX: 0000000000000200 RCX: b39c656a394cc900
RDX: dffffc0000000000 RSI: ffffffff8a8c17a0 RDI: ffffffff8adf42e0
RBP: ffffc900001e0f30 R08: ffff8880b8f3580b R09: 1ffff110171e6b01
R10: dffffc0000000000 R11: ffffed10171e6b02 R12: dffffc0000000000
R13: ffffffff8c80a0c0 R14: ffff88802ae99e00 R15: 000000000000000a
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__rcu_read_unlock+0x51/0xd0 kernel/rcu/tree_plugin.h:425
Code: ec 03 43 0f b6 04 3c 84 c0 75 48 ff 0b 75 1d 4c 8d b7 40 04 00 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 38 84 c0 75 5f 41 83 3e 00 <75> 20 43 0f b6 04 3c 84 c0 75 3a 8b 03 3d 00 00 00 40 73 0a 5b 41
RSP: 0018:ffffc900032176d8 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff88802ae9a23c RCX: b39c656a394cc900
RDX: 0000000000000001 RSI: ffffffff8adf42c0 RDI: ffff88802ae99e00
RBP: 0000000000502dc2 R08: ffffffff8e2121af R09: 1ffffffff1c42435
R10: dffffc0000000000 R11: fffffbfff1c42436 R12: 1ffff110055d3447
R13: dffffc0000000000 R14: ffff88802ae9a240 R15: dffffc0000000000
rcu_read_unlock include/linux/rcupdate.h:823 [inline]
get_obj_cgroup_from_current mm/memcontrol.c:3025 [inline]
__memcg_kmem_charge_page+0x1d8/0x380 mm/memcontrol.c:3123
__alloc_pages+0x21e/0x4f0 mm/page_alloc.c:5675
__alloc_pages_bulk+0x491/0x910 mm/page_alloc.c:5606
vm_area_alloc_pages mm/vmalloc.c:2968 [inline]
__vmalloc_area_node mm/vmalloc.c:3071 [inline]
__vmalloc_node_range+0x706/0x1380 mm/vmalloc.c:3243
__vmalloc_node mm/vmalloc.c:3308 [inline]
__vmalloc+0x76/0x80 mm/vmalloc.c:3322
bpf_prog_alloc_no_stats+0x37/0x3a0 kernel/bpf/core.c:92
bpf_prog_alloc+0x1c/0x1b0 kernel/bpf/core.c:130
bpf_prog_load+0x7d4/0x1530 kernel/bpf/syscall.c:2597
__sys_bpf+0x5b8/0x780 kernel/bpf/syscall.c:5031
__do_sys_bpf kernel/bpf/syscall.c:5135 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5133 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5133
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7e6799de99
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:00007f7e688d2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f7e67c25fa0 RCX: 00007f7e6799de99
RDX: 0000000000000094 RSI: 0000200000000880 RDI: 0000000000000005
RBP: 00007f7e67a33eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7e67c26038 R14: 00007f7e67c25fa0 R15: 00007fffd23494c8