============================= [ BUG: Invalid wait context ] 6.13.0-rc4-syzkaller-00012-g9b2ffa6148b1 #0 Not tainted ----------------------------- sshd/5860 is trying to lock: ffff88802b63b0a0 (batched_entropy_u8.lock){..-.}-{3:3}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline] ffff88802b63b0a0 (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} 1 lock held by sshd/5860: #0: ffff88802b63ed18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598 stack backtrace: CPU: 2 UID: 0 PID: 5860 Comm: sshd Not tainted 6.13.0-rc4-syzkaller-00012-g9b2ffa6148b1 #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: __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+0x125/0x420 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+0x50f/0x790 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+0x8e0/0x9e0 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+0x52/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0033:0x558993ef6634 Code: 0f af df 4c 0f af f7 49 01 ef 4c 89 d5 48 0f af e9 4c 01 fd 4c 8b 7c 24 18 49 01 eb 49 01 db 4d 0f af fc 48 89 f3 49 0f af dd <44> 89 dd 49 c1 eb 1a 45 89 db 81 e5 ff ff ff 03 4c 01 fb 4d 89 d7 RSP: 002b:00007ffcd2246700 EFLAGS: 00000202 RAX: 0000000000007014 RBX: 0006b0f30ca5921c RCX: 0000000003fbde18 RDX: 00000000041bac94 RSI: 000000000396c30e RDI: 000000000513d319 RBP: 005573ff28ef8972 R08: 00005589afdbc0b0 R09: 00007ffcd22467e8 R10: 00000000001265e2 R11: 00676d71dc7a17e9 R12: 000000001a55078e R13: 0000000001dd4a02 R14: 002c6dd05b3ab374 R15: 0012a4b85490db84