rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2632 jiffies s: 21125 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9422 Comm: syz.1.1331 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:ct_irq_enter+0x0/0x40 kernel/context_tracking.c:367
Code: 65 0c fa e9 cf fe ff ff e8 4d ee ff ff 48 c7 c7 60 a3 bc 8c 4c 89 f6 e8 9e 65 0c fa e9 40 ff ff ff 66 0f 1f 84 00 00 00 00 00 <83> 3d 9d f1 ef 03 00 0f 84 43 fa ff ff 65 8b 05 ec 1f d1 75 85 c0
RSP: 0018:ffffc900001e07d8 EFLAGS: 00000046
RAX: ffffffff81aa998a RBX: 1ffff9200003c0fc RCX: ffff88802af7da00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001e0888 R08: ffffffff8e2116af R09: 1ffffffff1c422d5
R10: dffffc0000000000 R11: fffffbfff1c422d6 R12: dffffc0000000000
R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000000
FS:  00007f71598846c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000003a7e4000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 ct_irq_enter_irqson+0xaf/0x170 kernel/context_tracking.c:407
 trace_irq_enable_rcuidle+0x9f/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:rcu_read_unlock_special+0x7f/0x510 kernel/rcu/tree_plugin.h:685
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 12 6c 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc900001e0980 EFLAGS: 00000206
RAX: 103674e14a7db800 RBX: 1ffff9200003c138 RCX: 103674e14a7db800
RDX: dffffc0000000000 RSI: ffffffff8a8c18a0 RDI: ffffffff8adf6420
RBP: ffffc900001e0a80 R08: ffffffff90b1332f R09: 1ffffffff2162665
R10: dffffc0000000000 R11: fffffbfff2162666 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8f3bb00 R15: 0000000000000002
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 hsr_announce+0x2ca/0x340 net/hsr/hsr_device.c:407
 call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x56c/0x810 kernel/time/timer.c:2023
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x291/0x910 kernel/softirq.c:596
 __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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:mt_find+0x106/0x830 lib/maple_tree.c:6532
Code: 00 00 48 c7 84 24 88 00 00 00 ff ff ff ff 4c 8d 74 24 60 49 8d 7e 30 ba 10 00 00 00 31 f6 e8 81 c9 b4 f7 48 8b 3d d2 30 02 04 <4c> 89 f6 e8 62 d8 ff ff 48 8b 44 24 10 42 80 3c 20 00 74 08 4c 89
RSP: 0018:ffffc900059277c0 EFLAGS: 00000202
RAX: ffffc90005927850 RBX: 1ffff92000b24f00 RCX: 0000000000000000
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffffff8bb1c380
RBP: ffffc900059278d0 R08: ffffc9000592785f R09: ffffc90005927850
R10: dffffc0000000000 R11: fffff52000b24f0c R12: dffffc0000000000
R13: 0000000000000000 R14: ffffc90005927820 R15: ffffc90005927900
 find_vma+0x12c/0x1b0 mm/mmap.c:1898
 lock_mm_and_find_vma+0x71/0x2f0 mm/memory.c:5385
 do_user_addr_fault+0x2e8/0xb20 arch/x86/mm/fault.c:1310
 handle_page_fault arch/x86/mm/fault.c:1429 [inline]
 exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1482
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0010:do_strncpy_from_user lib/strncpy_from_user.c:41 [inline]
RIP: 0010:strncpy_from_user+0x148/0x340 lib/strncpy_from_user.c:139
Code: 00 00 00 4c 89 e6 e8 47 02 45 fd 49 83 fc 07 0f 86 9a 00 00 00 4c 89 74 24 08 48 c7 44 24 10 f8 ff ff ff 45 31 ed 4c 89 3c 24 <4f> 8b 3c 2f 48 b8 ff fe fe fe fe fe fe fe 49 8d 2c 07 4d 89 fe 49
RSP: 0018:ffffc90005927b50 EFLAGS: 00050246
RAX: ffffffff843d4329 RBX: ffffc90005927c70 RCX: ffff88802af7da00
RDX: 0000000000000002 RSI: 000000000000007f RDI: 0000000000000007
RBP: 0000000000000000 R08: ffff88802af7da00 R09: 0000000000000003
R10: 0000000000000002 R11: 0000000000000002 R12: 000000000000007f
R13: 0000000000000000 R14: 000000000000007f R15: 0000000000000000
 strncpy_from_bpfptr include/linux/bpfptr.h:85 [inline]
 bpf_prog_load+0x200/0x1530 kernel/bpf/syscall.c:2535
 __sys_bpf+0x5b8/0x780 kernel/bpf/syscall.c:5032
 __do_sys_bpf kernel/bpf/syscall.c:5136 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5134 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5134
 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: 0033:0x7f715899e159
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:00007f7159884028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f7158c25fa0 RCX: 00007f715899e159
RDX: 0000000000000094 RSI: 00002000000000c0 RDI: 0000000000000005
RBP: 00007f7158a35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7158c26038 R14: 00007f7158c25fa0 R15: 00007ffd6ceaa4c8
 </TASK>