============================= [ BUG: Invalid wait context ] 6.13.0-rc2-syzkaller-g2d8308bf5b67 #0 Not tainted ----------------------------- syz.4.132/6372 is trying to lock: ffff8880b863aab0 (batched_entropy_u8.lock){..-.}-{3:3}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline] ffff8880b863aab0 (batched_entropy_u8.lock){..-.}-{3:3}, at: get_random_u8+0x1a0/0xaa0 drivers/char/random.c:551 other info that might help us debug this: context-{2:2} no locks held by syz.4.132/6372. stack backtrace: CPU: 0 UID: 0 PID: 6372 Comm: syz.4.132 Not tainted 6.13.0-rc2-syzkaller-g2d8308bf5b67 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_lock_invalid_wait_context kernel/locking/lockdep.c:4826 [inline] check_wait_context kernel/locking/lockdep.c:4898 [inline] __lock_acquire+0x15a8/0x2100 kernel/locking/lockdep.c:5176 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 local_lock_acquire include/linux/local_lock_internal.h:29 [inline] get_random_u8+0x1bd/0xaa0 drivers/char/random.c:551 get_random_u32_below include/linux/random.h:78 [inline] kfence_guarded_alloc+0x9c/0xcd0 mm/kfence/core.c:421 __kfence_alloc+0x344/0x370 mm/kfence/core.c:1136 kfence_alloc include/linux/kfence.h:129 [inline] slab_alloc_node mm/slub.c:4152 [inline] __kmalloc_cache_noprof+0x2dd/0x390 mm/slub.c:4324 kmalloc_noprof include/linux/slab.h:901 [inline] add_stack_record_to_list mm/page_owner.c:172 [inline] inc_stack_record_count mm/page_owner.c:214 [inline] __set_page_owner+0x55f/0x800 mm/page_owner.c:329 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3474 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269 stack_depot_save_flags+0x72d/0x940 lib/stackdepot.c:627 kasan_save_stack+0x4f/0x60 mm/kasan/common.c:48 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:544 task_work_add+0xd9/0x490 kernel/task_work.c:77 __perf_event_overflow+0x78d/0xdc0 kernel/events/core.c:9901 perf_swevent_hrtimer+0x3b3/0x560 kernel/events/core.c:11276 __run_hrtimer kernel/time/hrtimer.c:1739 [inline] __hrtimer_run_queues+0x551/0xd30 kernel/time/hrtimer.c:1803 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1865 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0033:0x7f0341b85d19 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0342a4f0e8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 00007f0341d75fa8 RCX: 00007f0341b85d19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f0341d75fa8 RBP: 00007f0341d75fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0341d75fac R13: 0000000000000000 R14: 00007ffdaa8326a0 R15: 00007ffdaa832788