------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 1 PID: 23 at kernel/locking/lockdep.c:232 hlock_class kernel/locking/lockdep.c:232 [inline] WARNING: CPU: 1 PID: 23 at kernel/locking/lockdep.c:232 check_wait_context kernel/locking/lockdep.c:4826 [inline] WARNING: CPU: 1 PID: 23 at kernel/locking/lockdep.c:232 __lock_acquire+0x58c/0x2050 kernel/locking/lockdep.c:5152 Modules linked in: CPU: 1 UID: 0 PID: 23 Comm: migration/1 Not tainted 6.12.0-rc7-syzkaller-00212-g4a5df3796467 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Stopper: 0x0 <- 0x0 RIP: 0010:hlock_class kernel/locking/lockdep.c:232 [inline] RIP: 0010:check_wait_context kernel/locking/lockdep.c:4826 [inline] RIP: 0010:__lock_acquire+0x58c/0x2050 kernel/locking/lockdep.c:5152 Code: 00 00 83 3d b5 db ac 0e 00 75 23 90 48 c7 c7 60 c9 0a 8c 48 c7 c6 00 cc 0a 8c e8 0f 7d e5 ff 48 ba 00 00 00 00 00 fc ff df 90 <0f> 0b 90 90 90 31 db 48 81 c3 c4 00 00 00 48 89 d8 48 c1 e8 03 0f RSP: 0018:ffffc90000a18b10 EFLAGS: 00010046 RAX: 4435ceb2235e7f00 RBX: 0000000000000d68 RCX: ffff88801d2fda00 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000005 R08: ffffffff8155e312 R09: 1ffff110170e519a R10: dffffc0000000000 R11: ffffed10170e519b R12: ffff88801d2fda00 R13: 0000000000000d68 R14: 1ffff11003a5fca5 R15: ffff88801d2fe528 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3070fff8 CR3: 000000002910c000 CR4: 0000000000350ef0 Call Trace: <IRQ> lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598 _double_lock_balance kernel/sched/sched.h:2985 [inline] double_lock_balance kernel/sched/sched.h:3030 [inline] find_lock_lowest_rq+0x1e1/0x670 kernel/sched/rt.c:1924 push_rt_task+0x13f/0x7e0 kernel/sched/rt.c:2057 rto_push_irq_work_func+0x93/0x350 kernel/sched/rt.c:2260 irq_work_single+0x136/0x240 kernel/irq_work.c:221 __flush_smp_call_function_queue+0xa17/0x1690 kernel/smp.c:574 __sysvec_call_function_single+0xb8/0x430 arch/x86/kernel/smp.c:271 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline] sysvec_call_function_single+0x9e/0xc0 arch/x86/kernel/smp.c:266 </IRQ> <TASK> asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709 RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5202 Code: c9 50 e8 79 00 0c 00 48 83 c4 08 4c 89 f7 e8 4d 39 00 00 0f 1f 44 00 00 4c 89 f7 e8 f0 3d 6d 0a e8 ab 5b 38 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc RSP: 0018:ffffc900001d7b88 EFLAGS: 00000282 RAX: 4435ceb2235e7f00 RBX: ffff88801d2fda00 RCX: ffffffff9a3d7903 RDX: dffffc0000000000 RSI: ffffffff8c0acac0 RDI: ffffffff8c610d20 RBP: ffffc900001d7bd0 R08: ffffffff901d0caf R09: 1ffffffff203a195 R10: dffffc0000000000 R11: fffffbfff203a196 R12: 1ffff110170e7f14 R13: dffffc0000000000 R14: ffff8880b873ea80 R15: ffff8880b873f8a0 context_switch kernel/sched/core.c:5331 [inline] __schedule+0x1857/0x4c30 kernel/sched/core.c:6693 __schedule_loop kernel/sched/core.c:6770 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6785 smpboot_thread_fn+0x61e/0xa30 kernel/smpboot.c:160 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> ---------------- Code disassembly (best guess): 0: c9 leave 1: 50 push %rax 2: e8 79 00 0c 00 call 0xc0080 7: 48 83 c4 08 add $0x8,%rsp b: 4c 89 f7 mov %r14,%rdi e: e8 4d 39 00 00 call 0x3960 13: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 18: 4c 89 f7 mov %r14,%rdi 1b: e8 f0 3d 6d 0a call 0xa6d3e10 20: e8 ab 5b 38 00 call 0x385bd0 25: fb sti 26: 48 8b 5d c0 mov -0x40(%rbp),%rbx * 2a: 48 8d bb f8 15 00 00 lea 0x15f8(%rbx),%rdi <-- trapping instruction 31: 48 89 f8 mov %rdi,%rax 34: 48 c1 e8 03 shr $0x3,%rax 38: 49 rex.WB 39: be 00 00 00 00 mov $0x0,%esi 3e: 00 fc add %bh,%ah