------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 1 PID: 5191 at kernel/locking/lockdep.c:234 hlock_class kernel/locking/lockdep.c:234 [inline] WARNING: CPU: 1 PID: 5191 at kernel/locking/lockdep.c:234 check_wait_context kernel/locking/lockdep.c:4852 [inline] WARNING: CPU: 1 PID: 5191 at kernel/locking/lockdep.c:234 __lock_acquire+0x564/0x2100 kernel/locking/lockdep.c:5178 Modules linked in: CPU: 1 UID: 0 PID: 5191 Comm: klogd Not tainted 6.14.0-rc7-syzkaller-00137-g5fc319360819 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:hlock_class kernel/locking/lockdep.c:234 [inline] RIP: 0010:check_wait_context kernel/locking/lockdep.c:4852 [inline] RIP: 0010:__lock_acquire+0x564/0x2100 kernel/locking/lockdep.c:5178 Code: 00 00 83 3d 01 4f a0 0e 00 75 23 90 48 c7 c7 40 b2 2a 8c 48 c7 c6 40 b5 2a 8c e8 97 bc e4 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:ffffc90004287510 EFLAGS: 00010046 RAX: af4b97252ef75300 RBX: 0000000000001b20 RCX: ffff88807cf18000 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00000000000c1b20 R08: ffffffff81819e52 R09: fffffbfff1d3a69c R10: dffffc0000000000 R11: fffffbfff1d3a69c R12: ffff88807cf18ad4 R13: 0000000000000000 R14: 1ffff1100f9e3162 R15: ffff88807cf18b10 FS: 00007fd674772380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c380710 CR3: 000000007d3c0000 CR4: 0000000000350ef0 Call Trace: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:606 raw_spin_rq_lock kernel/sched/sched.h:1521 [inline] rq_lock kernel/sched/sched.h:1852 [inline] __schedule+0x357/0x4c90 kernel/sched/core.c:6688 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7087 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707 RIP: 0010:copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] RIP: 0010:raw_copy_to_user arch/x86/include/asm/uaccess_64.h:147 [inline] RIP: 0010:_inline_copy_to_user include/linux/uaccess.h:197 [inline] RIP: 0010:_copy_to_user+0x88/0xb0 lib/usercopy.c:26 Code: cc fc 4c 39 fb 72 3d 4c 39 eb 77 38 e8 b1 2a cc fc 4c 89 f7 44 89 e6 e8 a6 6c 33 fd 0f 01 cb 4c 89 ff 4c 89 e1 4c 89 f6 f3 a4 <0f> 1f 00 49 89 cc 0f 01 ca 4c 89 e0 5b 41 5c 41 5d 41 5e 41 5f e9 RSP: 0018:ffffc90004287b30 EFLAGS: 00040256 RAX: ffffffff84f5b501 RBX: 00007fd674a72500 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff88806cae5060 RDI: 00007fd674a72500 RBP: ffffc90004287d30 R08: ffff88806cae505f R09: 1ffff1100d95ca0b R10: dffffc0000000000 R11: ffffed100d95ca0c R12: 0000000000000060 R13: 00007ffffffff000 R14: ffff88806cae5000 R15: 00007fd674a724a0 copy_to_user include/linux/uaccess.h:225 [inline] syslog_print+0x4e2/0x630 kernel/printk/printk.c:1684 do_syslog+0x3c2/0x820 kernel/printk/printk.c:1785 __do_sys_syslog kernel/printk/printk.c:1877 [inline] __se_sys_syslog kernel/printk/printk.c:1875 [inline] __x64_sys_syslog+0x7c/0x90 kernel/printk/printk.c:1875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd6748d3fa7 Code: 73 01 c3 48 8b 0d 81 ce 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 67 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 51 ce 0c 00 f7 d8 64 89 01 48 RSP: 002b:00007ffc275d6528 EFLAGS: 00000206 ORIG_RAX: 0000000000000067 RAX: ffffffffffffffda RBX: 00007fd674a724a0 RCX: 00007fd6748d3fa7 RDX: 00000000000003ff RSI: 00007fd674a724a0 RDI: 0000000000000002 RBP: 0000000000000000 R08: 0000000000000007 R09: 36e0c4e0152aaad7 R10: 0000000000004000 R11: 0000000000000206 R12: 00007fd674a724a0 R13: 00007fd674a62212 R14: 00007fd674a7252a R15: 00007fd674a7252a ---------------- Code disassembly (best guess): 0: cc int3 1: fc cld 2: 4c 39 fb cmp %r15,%rbx 5: 72 3d jb 0x44 7: 4c 39 eb cmp %r13,%rbx a: 77 38 ja 0x44 c: e8 b1 2a cc fc call 0xfccc2ac2 11: 4c 89 f7 mov %r14,%rdi 14: 44 89 e6 mov %r12d,%esi 17: e8 a6 6c 33 fd call 0xfd336cc2 1c: 0f 01 cb stac 1f: 4c 89 ff mov %r15,%rdi 22: 4c 89 e1 mov %r12,%rcx 25: 4c 89 f6 mov %r14,%rsi 28: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) * 2a: 0f 1f 00 nopl (%rax) <-- trapping instruction 2d: 49 89 cc mov %rcx,%r12 30: 0f 01 ca clac 33: 4c 89 e0 mov %r12,%rax 36: 5b pop %rbx 37: 41 5c pop %r12 39: 41 5d pop %r13 3b: 41 5e pop %r14 3d: 41 5f pop %r15 3f: e9 .byte 0xe9