rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2640 jiffies s: 167213 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: 21186 Comm: syz.4.13986 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:202 [inline]
RIP: 0010:arch_atomic_fetch_or arch/x86/include/asm/atomic.h:242 [inline]
RIP: 0010:atomic_fetch_or include/linux/atomic/atomic-instrumented.h:407 [inline]
RIP: 0010:irq_work_claim kernel/irq_work.c:59 [inline]
RIP: 0010:irq_work_queue_on+0xd1/0x260 kernel/irq_work.c:137
Code: b6 44 00 4c 89 f8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 3e 01 00 00 45 8b 37 44 89 f1 83 c9 23 31 f6 44 89 f0 f0 41 0f b1 0f <41> 89 c4 41 0f 94 c5 40 0f 94 c6 bf 02 00 00 00 e8 3a ac f3 ff 45
RSP: 0018:ffffc90004136e48 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff8880b8f3b9f0 RCX: 0000000000000023
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff8880b8f3b9f8
RBP: 0000000000000001 R08: ffff8880b8f3b9fb R09: 1ffff110171e773f
R10: dffffc0000000000 R11: ffffed10171e7740 R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b8f3b9f8
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4b65dfba10 CR3: 00000000375ba000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 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: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 d2 33 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:ffffc900041372e0 EFLAGS: 00000206
RAX: b27384ee02031a00 RBX: 1ffff92000826e64 RCX: b27384ee02031a00
RDX: dffffc0000000000 RSI: ffffffff8a8c10a0 RDI: ffffffff8adf0d20
RBP: ffffc900041373d8 R08: ffffffff90af7247 R09: 1ffffffff215ee48
R10: dffffc0000000000 R11: fffffbfff215ee49 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8f3b900 R15: 0000000000000002
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 __folio_memcg_unlock+0xea/0x110 mm/memcontrol.c:2151
 page_remove_rmap+0x7e3/0xea0 mm/rmap.c:1462
 zap_pte_range mm/memory.c:1451 [inline]
 zap_pmd_range mm/memory.c:1572 [inline]
 zap_pud_range mm/memory.c:1601 [inline]
 zap_p4d_range mm/memory.c:1622 [inline]
 unmap_page_range+0x114a/0x2500 mm/memory.c:1643
 unmap_vmas+0x260/0x390 mm/memory.c:1728
 exit_mmap+0x20d/0x960 mm/mmap.c:3250
 __mmput+0x118/0x3c0 kernel/fork.c:1205
 exit_mm+0x1fe/0x2d0 kernel/exit.c:565
 do_exit+0x905/0x2480 kernel/exit.c:867
 do_group_exit+0x217/0x2d0 kernel/exit.c:1022
 get_signal+0x1272/0x1350 kernel/signal.c:2871
 arch_do_signal_or_restart+0xc4/0x1350 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:288
RIP: 0033:0x7f3b4f19d609
Code: Unable to access opcode bytes at 0x7f3b4f19d5df.
RSP: 002b:00007f3b4d3d51c0 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3
RAX: 0000000000000000 RBX: 00007f3b4f158ba0 RCX: 00007f3b4f19d609
RDX: 00007f3b4f158ba0 RSI: 0000000000000058 RDI: 00007ffdf2b69a50
RBP: 00007f3b4d3d56c0 R08: 00007f3b4d3d56c0 R09: 00007ffdf2b69b37
R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffe8
R13: 000000000000000b R14: 00007ffdf2b69a50 R15: 00007ffdf2b69b38
 </TASK>