============================= [ BUG: Invalid wait context ] 6.13.0-rc1-syzkaller-00316-gb5f217084ab3 #0 Not tainted ----------------------------- sshd/5913 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} 1 lock held by sshd/5913: #0: 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: 5913 Comm: sshd Not tainted 6.13.0-rc1-syzkaller-00316-gb5f217084ab3 #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:4137 [inline] __kmalloc_cache_noprof+0x129/0x410 mm/slub.c:4309 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:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3474 __alloc_pages_noprof+0x223/0x25b0 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2265 stack_depot_save_flags+0x566/0x8f0 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:3607 [inline] task_tick_fair+0x524/0x8e0 kernel/sched/fair.c:13054 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: 0033:0x5572ef412823 Code: 4c 89 ed 4c 89 e7 f3 aa eb 48 4c 89 e7 e8 95 48 f7 ff 48 89 c5 48 85 c0 74 38 48 89 c7 4c 89 ee 4d 39 f4 76 11 4c 89 f1 31 c0 a4 4c 89 e1 4c 29 f1 f3 aa eb 05 4c 89 e1 f3 a4 4c 89 ef 48 83 RSP: 002b:00007fff9354a6c0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000300000 RCX: 0000000000009210 RDX: 0000000000000002 RSI: 00007f965b54c000 RDI: 00007f965b24b000 RBP: 00007f965af57010 R08: 00007f965af57010 R09: 0000000000000000 R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000300000 R13: 00007f965b258010 R14: 00000000002fd200 R15: 00007fff9354a878