rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6019/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=12713, q=480 ncpus=2)
task:modprobe state:R running task stack:24232 pid:6019 ppid:48 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7009
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:get_current arch/x86/include/asm/current.h:41 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x60 kernel/kcov.c:215
Code: 00 00 f3 0f 1e fa 53 48 89 fb e8 13 00 00 00 48 8b 3d 2c fa c4 0c 48 89 de 5b e9 03 87 56 00 cc cc cc f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0d c0 2c 7e 7e 65 8b 15 c1 2c 7e 7e 81 e2 00 01 ff 00 74
RSP: 0018:ffffc900036d7758 EFLAGS: 00000287
RAX: ffffffff8a5c09a2 RBX: 000000000000000b RCX: ffff88807849bc00
RDX: 0000000000000000 RSI: 00007f525c38ffff RDI: 00007f525c38efff
RBP: ffffc900036d7930 R08: ffff88807849bc00 R09: 0000000000000003
R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88807870a460 R14: 00007f525c38efff R15: 00007f525c38ffff
mas_validate_limits lib/maple_tree.c:7116 [inline]
mt_validate+0xca2/0x4530 lib/maple_tree.c:7229
validate_mm+0xb1/0x420 mm/mmap.c:288
mmap_region+0xeaa/0x2020 mm/mmap.c:2947
do_mmap+0x92f/0x10a0 mm/mmap.c:1385
vm_mmap_pgoff+0x1c0/0x400 mm/util.c:556
ksys_mmap_pgoff+0x520/0x700 mm/mmap.c:1431
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f525c669242
RSP: 002b:00007ffd2bc733e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f525c37d000 RCX: 00007f525c669242
RDX: 0000000000000005 RSI: 0000000000008000 RDI: 00007f525c37d000
RBP: 0000000000000812 R08: 0000000000000000 R09: 0000000000003000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffd2bc73438
R13: 00007f525c646580 R14: 00007ffd2bc73860 R15: 00000fffa578e680
rcu: rcu_preempt kthread starved for 10538 jiffies! g12713 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R running task stack:26728 pid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
schedule+0xbd/0x170 kernel/sched/core.c:6773
schedule_timeout+0x160/0x280 kernel/time/timer.c:2167
rcu_gp_fqs_loop+0x302/0x1560 kernel/rcu/tree.c:1667
rcu_gp_kthread+0x99/0x380 kernel/rcu/tree.c:1866
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 6022 Comm: syz.1.22 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:-1 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
RIP: 0010:unwind_next_frame+0x506/0x2970 arch/x86/kernel/unwind_orc.c:494
Code: 00 00 00 00 fc ff df eb 97 44 89 f9 80 e1 07 80 c1 03 38 c1 7c b5 4c 89 ff e8 c6 3a a2 00 eb ab e8 2f e3 4a 00 48 2b 6c 24 28 <49> 89 ec 49 bd 00 00 00 00 00 fc ff df 48 8b 6c 24 10 48 8b 44 24
RSP: 0018:ffffc90000007878 EFLAGS: 00000002
RAX: ffffffff813aa7c1 RBX: ffffffff8e6259b4 RCX: ffff888030160000
RDX: 0000000000010000 RSI: ffffffff81dcbddb RDI: ffffffff81dcbd7a
RBP: 0000000000000020 R08: ffffc90000007a10 R09: 0000000000000001
R10: 0000000000000004 R11: 0000000000010000 R12: ffffffff8e6259b8
R13: ffffffff81dcbd7a R14: ffffffff81dcbddb R15: ffffffff8e6259b4
FS: 00007f7f18a966c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000258b6000 CR4: 00000000003506f0
Call Trace:
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767
slab_alloc_node mm/slub.c:3495 [inline]
slab_alloc mm/slub.c:3503 [inline]
__kmem_cache_alloc_lru mm/slub.c:3510 [inline]
kmem_cache_alloc+0x11e/0x2e0 mm/slub.c:3519
__sigqueue_alloc+0x40c/0x520 kernel/signal.c:438
__send_signal_locked+0x22f/0xe00 kernel/signal.c:1130
do_send_sig_info kernel/signal.c:1312 [inline]
group_send_sig_info+0x1fa/0x260 kernel/signal.c:1462
do_bpf_send_signal+0x7f/0x190 kernel/trace/bpf_trace.c:836
irq_work_single+0xd5/0x230 kernel/irq_work.c:221
irq_work_run_list kernel/irq_work.c:252 [inline]
irq_work_run+0x156/0x2e0 kernel/irq_work.c:261
__sysvec_irq_work+0x98/0x380 arch/x86/kernel/irq_work.c:22
instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
sysvec_irq_work+0x9c/0xc0 arch/x86/kernel/irq_work.c:17
asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:723
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:207 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:147 [inline]
RIP: 0010:wrmsr arch/x86/include/asm/msr.h:254 [inline]
RIP: 0010:native_apic_msr_write+0x39/0x50 arch/x86/include/asm/apic.h:196
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 f3 0f 1e fa 89 f6 31 d2 e9 47 e9 18 03 0f 1f 80 00 00 00
RSP: 0018:ffffc90003747cd8 EFLAGS: 00000246
RAX: 00000000000000f6 RBX: 0000000000000200 RCX: 000000000000083f
RDX: 0000000000000000 RSI: 00000000000000f6 RDI: 000000000000083f
RBP: 0000000000000000 R08: ffffc90003747c47 R09: 1ffff920006e8f88
R10: dffffc0000000000 R11: fffff520006e8f89 R12: ffff8880b8e35001
R13: dffffc0000000000 R14: ffff8880b8e35050 R15: 0000000000000020
__apic_send_IPI_self arch/x86/include/asm/apic.h:454 [inline]
arch_irq_work_raise+0x68/0x70 arch/x86/kernel/irq_work.c:31
irq_work_queue+0x99/0x140 kernel/irq_work.c:124
bpf_send_signal_common+0x2b6/0x420 kernel/trace/bpf_trace.c:875
____bpf_send_signal kernel/trace/bpf_trace.c:884 [inline]
bpf_send_signal+0x19/0x20 kernel/trace/bpf_trace.c:882
bpf_prog_7ba5217f62dcd359+0x40/0x44
bpf_dispatcher_nop_func include/linux/bpf.h:1223 [inline]
__bpf_prog_run include/linux/filter.h:612 [inline]
bpf_prog_run include/linux/filter.h:619 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2322 [inline]
bpf_trace_run2+0x1d1/0x3c0 kernel/trace/bpf_trace.c:2361
trace_sys_enter+0x69/0x80 include/trace/events/syscalls.h:18
syscall_trace_enter+0xf0/0x150 kernel/entry/common.c:81
do_syscall_64+0x28/0xb0 arch/x86/entry/common.c:77
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7f17b2af79
Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25
RSP: 002b:00007f7f18a95b40 EFLAGS: 00000246 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 00007f7f17de5fa8 RCX: 00007f7f17b2af79
RDX: 00007f7f18a95b40 RSI: 00007f7f18a95c70 RDI: 0000000000000011
RBP: 00007f7f17de5fa0 R08: 0000000000745d1e R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7f17de6038 R14: 00007fff9cfda4a0 R15: 00007fff9cfda588