=============================
[ BUG: Invalid wait context ]
6.13.0-rc6-syzkaller-00059-g643e2e259c2b #0 Not tainted
-----------------------------
syz-executor/5919 is trying to lock:
ffff88806a63af60 (batched_entropy_u8.lock){..-.}-{3:3}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
ffff88806a63af60 (batched_entropy_u8.lock){..-.}-{3:3}, at: get_random_u8+0xef/0x7f0 drivers/char/random.c:551
other info that might help us debug this:
context-{2:2}
2 locks held by syz-executor/5919:
 #0: ffff8880305728e0 (&vma->vm_lock->lock){++++}-{4:4}, at: vma_start_read include/linux/mm.h:717 [inline]
 #0: ffff8880305728e0 (&vma->vm_lock->lock){++++}-{4:4}, at: lock_vma_under_rcu+0x13e/0x980 mm/memory.c:6278
 #1: ffff88806a63ebd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598
stack backtrace:
CPU: 0 UID: 0 PID: 5919 Comm: syz-executor Not tainted 6.13.0-rc6-syzkaller-00059-g643e2e259c2b #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 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+0x878/0x3c40 kernel/locking/lockdep.c:5176
 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
 local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
 get_random_u8+0x107/0x7f0 drivers/char/random.c:551
 get_random_u32_below include/linux/random.h:78 [inline]
 kfence_guarded_alloc mm/kfence/core.c:421 [inline]
 __kfence_alloc+0x4e8/0x15f0 mm/kfence/core.c:1136
 kfence_alloc include/linux/kfence.h:129 [inline]
 slab_alloc_node mm/slub.c:4152 [inline]
 __kmalloc_cache_noprof+0x129/0x410 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+0x34d/0x560 mm/page_owner.c:329
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558
 prep_new_page mm/page_alloc.c:1566 [inline]
 get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3476
 __alloc_pages_noprof+0x223/0x25b0 mm/page_alloc.c:4753
 alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2269
 stack_depot_save_flags+0x8aa/0x9c0 lib/stackdepot.c:627
 kasan_save_stack+0x42/0x60 mm/kasan/common.c:48
 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:544
 task_work_add+0xc0/0x3b0 kernel/task_work.c:77
 task_tick_numa kernel/sched/fair.c:3616 [inline]
 task_tick_fair+0x524/0x8e0 kernel/sched/fair.c:13101
 sched_tick+0x1dd/0x4f0 kernel/sched/core.c:5652
 update_process_times+0x19c/0x2d0 kernel/time/timer.c:2524
 tick_sched_handle kernel/time/tick-sched.c:276 [inline]
 tick_nohz_handler+0x376/0x530 kernel/time/tick-sched.c:297
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x5fb/0xae0 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0x6d/0xc0 kernel/rcu/tree.c:737
Code: 48 03 1c ed e0 7c a7 8d 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 0f b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 <84> d2 75 24 8b 03 c1 e8 02 83 e0 01 65 ff 0d c8 3a 84 7e 74 07 5b
RSP: 0000:ffffc900045ffda0 EFLAGS: 00000206
RAX: 0000000000000003 RBX: ffff88806a637f68 RCX: ffffffff8175dcfc
RDX: 0000000000000000 RSI: ffffffff8bd1ec60 RDI: ffffffff8da77ce0
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff20be7ba
R10: ffffffff905f3dd7 R11: 0000000000000003 R12: 0000000000000000
R13: 000000000003d90c R14: 0000000000000000 R15: 0000000000000000
 trace_lock_acquire+0x14e/0x1f0 include/trace/events/lock.h:24
 lock_acquire+0x2f/0xb0 kernel/locking/lockdep.c:5820
 rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 count_memcg_events_mm.constprop.0+0x40/0x340 include/linux/memcontrol.h:994
 count_memcg_event_mm include/linux/memcontrol.h:1004 [inline]
 mm_account_fault mm/memory.c:5978 [inline]
 handle_mm_fault+0x5cc/0xaa0 mm/memory.c:6138
 do_user_addr_fault+0x60d/0x13f0 arch/x86/mm/fault.c:1338
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7face4d517ea
Code: 00 0f 87 a9 00 00 00 b9 ff ff ff ff c4 e2 68 f5 c9 c5 fb 92 c9 62 e1 7f 29 7f 00 c3 0f 1f 40 00 40 0f b6 c6 48 89 d1 48 89 fa <f3> aa 48 89 d0 c3 48 3b 15 71 99 1f 00 77 e7 62 e1 fe 28 7f 07 62
RSP: 002b:00007fff648b6758 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 0000000000001000 RCX: 0000000000000786
RDX: 00007face05c3787 RSI: 0000000000000000 RDI: 00007face05c4000
RBP: 00005555875dbe88 R08: 0000000000d74000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007face05c4786
R13: 00005555875dac40 R14: 00007fff648b68a0 R15: 00007fff648b6880
 </TASK>
----------------
Code disassembly (best guess):
   0:	48 03 1c ed e0 7c a7 	add    -0x72588320(,%rbp,8),%rbx
   7:	8d
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df
  12:	48 89 da             	mov    %rbx,%rdx
  15:	48 c1 ea 03          	shr    $0x3,%rdx
  19:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
  1d:	48 89 d8             	mov    %rbx,%rax
  20:	83 e0 07             	and    $0x7,%eax
  23:	83 c0 03             	add    $0x3,%eax
  26:	38 d0                	cmp    %dl,%al
  28:	7c 04                	jl     0x2e
* 2a:	84 d2                	test   %dl,%dl <-- trapping instruction
  2c:	75 24                	jne    0x52
  2e:	8b 03                	mov    (%rbx),%eax
  30:	c1 e8 02             	shr    $0x2,%eax
  33:	83 e0 01             	and    $0x1,%eax
  36:	65 ff 0d c8 3a 84 7e 	decl   %gs:0x7e843ac8(%rip)        # 0x7e843b05
  3d:	74 07                	je     0x46
  3f:	5b                   	pop    %rbx