------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 0 PID: 17 at kernel/locking/lockdep.c:231 hlock_class kernel/locking/lockdep.c:231 [inline] WARNING: CPU: 0 PID: 17 at kernel/locking/lockdep.c:231 check_wait_context kernel/locking/lockdep.c:4772 [inline] WARNING: CPU: 0 PID: 17 at kernel/locking/lockdep.c:231 __lock_acquire+0x58c/0x2040 kernel/locking/lockdep.c:5092 Modules linked in: CPU: 0 UID: 0 PID: 17 Comm: rcu_preempt Not tainted 6.11.0-rc1-syzkaller-00043-g94ede2a3e913 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:hlock_class kernel/locking/lockdep.c:231 [inline] RIP: 0010:check_wait_context kernel/locking/lockdep.c:4772 [inline] RIP: 0010:__lock_acquire+0x58c/0x2040 kernel/locking/lockdep.c:5092 Code: 00 00 83 3d 85 19 a8 0e 00 75 23 90 48 c7 c7 00 d4 0a 8c 48 c7 c6 a0 d6 0a 8c e8 bf d9 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:ffffc90000167410 EFLAGS: 00010046 RAX: 3ca82749c74e6d00 RBX: 0000000000000bc0 RCX: ffff8880182d8000 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff815592f2 R09: 1ffff1101724519a R10: dffffc0000000000 R11: ffffed101724519b R12: ffff8880182d8000 R13: 0000000000000bc0 R14: 1ffff1100305b160 R15: ffff8880182d8b00 FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32301ff8 CR3: 000000005d542000 CR4: 0000000000350ef0 Call Trace: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:568 raw_spin_rq_lock kernel/sched/sched.h:1415 [inline] rq_lock kernel/sched/sched.h:1714 [inline] __schedule+0x357/0x4a60 kernel/sched/core.c:6436 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707 RIP: 0010:__mod_timer+0x112/0xeb0 kernel/time/timer.c:1079 Code: 3c 38 00 74 05 e8 ee b1 7a 00 48 c7 84 24 e0 00 00 00 00 00 00 00 4c 89 f7 48 c7 c6 c0 c1 0c 8c e8 d3 ed 37 03 44 8b 64 24 34 <44> 89 e6 83 e6 04 31 ff e8 81 7e 13 00 41 83 e4 04 4c 89 74 24 28 RSP: 0018:ffffc90000167a40 EFLAGS: 00000246 RAX: 3ca82749c74e6d00 RBX: ffffc90000167b00 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: ffffffff8c0ad560 RDI: ffffc90000167980 RBP: ffffc90000167b90 R08: ffffffff90179faf R09: 1ffffffff202f3f5 R10: dffffc0000000000 R11: fffffbfff202f3f6 R12: 0000000000000004 R13: 00000000ffffd91b R14: ffffc90000167bc0 R15: dffffc0000000000 schedule_timeout+0x1b9/0x310 kernel/time/timer.c:2580 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236 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 ---------------- Code disassembly (best guess): 0: 3c 38 cmp $0x38,%al 2: 00 74 05 e8 add %dh,-0x18(%rbp,%rax,1) 6: ee out %al,(%dx) 7: b1 7a mov $0x7a,%cl 9: 00 48 c7 add %cl,-0x39(%rax) c: 84 24 e0 test %ah,(%rax,%riz,8) f: 00 00 add %al,(%rax) 11: 00 00 add %al,(%rax) 13: 00 00 add %al,(%rax) 15: 00 4c 89 f7 add %cl,-0x9(%rcx,%rcx,4) 19: 48 c7 c6 c0 c1 0c 8c mov $0xffffffff8c0cc1c0,%rsi 20: e8 d3 ed 37 03 call 0x337edf8 25: 44 8b 64 24 34 mov 0x34(%rsp),%r12d * 2a: 44 89 e6 mov %r12d,%esi <-- trapping instruction 2d: 83 e6 04 and $0x4,%esi 30: 31 ff xor %edi,%edi 32: e8 81 7e 13 00 call 0x137eb8 37: 41 83 e4 04 and $0x4,%r12d 3b: 4c 89 74 24 28 mov %r14,0x28(%rsp)