rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-....: (10 ticks this GP) idle=c1c4/1/0x4000000000000000 softirq=804404/804404 fqs=20797 rcu: (detected by 0, t=105002 jiffies, g=895429, q=52530 ncpus=2) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 175647 Comm: syz-executor.3 Not tainted 6.2.0-rc8-next-20230217 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:native_apic_mem_write+0xc/0x20 Code: 1f 00 b8 01 00 00 00 e9 56 d4 37 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 89 ff 89 b7 00 c0 5f ff 33 d4 37 03 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 RSP: 0018:ffff88806cf09918 EFLAGS: 00000046 RAX: ffffffff8111bb80 RBX: ffffffff852a3c80 RCX: ffffffff8112ae21 RDX: 1ffffffff0a54791 RSI: 0000000000000000 RDI: 00000000000000b0 RBP: ffff88806cf09948 R08: 0000000000000001 R09: ffff88806cf282cf R10: ffffed100d9e5059 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fd95d7c1700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd95dfc29c8 CR3: 000000004ef64000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __sysvec_irq_work+0x55/0x3c0 sysvec_irq_work+0x33/0x90 asm_sysvec_irq_work+0x1a/0x20 RIP: 0010:__rcu_read_unlock+0xc8/0x4f0 Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 76 01 00 00 8b 85 f8 03 00 00 85 c0 75 58 <65> 48 8b 1c 25 80 89 03 00 48 8d bb f4 03 00 00 48 b8 00 00 00 00 RSP: 0018:ffff88806cf099f0 EFLAGS: 00000206 RAX: 000000000000bdde RBX: ffff88806cf3a140 RCX: 1ffffffff0ba46b1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff813684b1 RBP: ffffffff85615980 R08: 0000000000000001 R09: 0000000000000001 R10: fffffbfff0ba4bca R11: 0000000000000001 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000200 R15: 0000000000000001 __is_insn_slot_addr+0x12f/0x290 kernel_text_address+0x48/0xc0 __kernel_text_address+0xd/0x40 unwind_get_return_address+0x59/0xa0 arch_stack_walk+0x9d/0xf0 stack_trace_save+0x90/0xd0 kasan_save_stack+0x22/0x50 kasan_set_track+0x25/0x30 kasan_save_free_info+0x2e/0x50 __kasan_slab_free+0x10a/0x190 kmem_cache_free+0xff/0x510 rcu_core+0x822/0x1d40 __do_softirq+0x258/0x8a2 __irq_exit_rcu+0xcc/0x110 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x6e/0x90 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:lock_acquire.part.0+0x10f/0x320 Code: b6 c9 e8 e4 86 ff ff b8 ff ff ff ff 48 83 c4 28 65 0f c1 05 53 29 d5 7e 83 f8 01 0f 85 ab 01 00 00 48 85 ed 0f 85 9c 01 00 00 <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7 RSP: 0018:ffff88804ce9fc78 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 1ffff110099d3f92 RCX: 0000000000000001 RDX: 1ffff11009fafb33 RSI: 653a2876fa416baa RDI: 00000000a28b5b82 RBP: 0000000000000200 R08: 0000000000000000 R09: ffffffff8777899f R10: fffffbfff0eef133 R11: 0000000000000001 R12: ffffffff8560a8c0 R13: ffff88804fd7d040 R14: 0000000000000000 R15: ffff888008e0a370 fd_install+0x76/0x6e0 __do_sys_perf_event_open+0x1aaa/0x2a60 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7fd96024bb19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd95d7c1188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007fd96035ef60 RCX: 00007fd96024bb19 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000280 RBP: 00007fd9602a5f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd02f5afff R14: 00007fd95d7c1300 R15: 0000000000022000 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 b8 01 00 00 00 add %bh,0x1(%rax) 6: e9 56 d4 37 03 jmpq 0x337d461 b: 66 90 xchg %ax,%ax d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: f3 0f 1e fa endbr64 21: 89 ff mov %edi,%edi 23: 89 b7 00 c0 5f ff mov %esi,-0xa04000(%rdi) * 29: e9 33 d4 37 03 jmpq 0x337d461 <-- trapping instruction 2e: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1) 35: 00 00 00 00 39: 0f 1f 40 00 nopl 0x0(%rax) 3d: 90 nop 3e: 90 nop