=============================
[ BUG: Invalid wait context ]
6.13.0-rc4-syzkaller-00004-gf07044dd0df0 #0 Not tainted
-----------------------------
sshd/5930 is trying to lock:
ffff88802b73b0a0 (batched_entropy_u8.lock){..-.}-{3:3}, at: local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
ffff88802b73b0a0 (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}
3 locks held by sshd/5930:
#0: ffff88804c2454a8 (&vma->vm_lock->lock){++++}-{4:4}, at: vma_start_read include/linux/mm.h:717 [inline]
#0: ffff88804c2454a8 (&vma->vm_lock->lock){++++}-{4:4}, at: lock_vma_under_rcu+0x13e/0x980 mm/memory.c:6278
#1: ffffffff8df4ef60 (fs_reclaim){+.+.}-{0:0}, at: might_alloc include/linux/sched/mm.h:318 [inline]
#1: ffffffff8df4ef60 (fs_reclaim){+.+.}-{0:0}, at: prepare_alloc_pages.constprop.0+0x155/0x560 mm/page_alloc.c:4512
#2: ffff88802b73ed18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:598
stack backtrace:
CPU: 3 UID: 0 PID: 5930 Comm: sshd Not tainted 6.13.0-rc4-syzkaller-00004-gf07044dd0df0 #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+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x3e5/0x6f0 kernel/locking/lockdep.c:5857
Code: 7e 83 f8 01 0f 85 fe 01 00 00 9c 58 f6 c4 02 0f 85 e9 01 00 00 48 f7 04 24 00 02 00 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 c7 43 08 00 00 00 00 48 8b 84 24 88
RSP: 0000:ffffc900037f7740 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920006feeea RCX: ffffc900037f7790
RDX: 1ffff11004b9915a RSI: ffffffff8b4cd580 RDI: ffffffff8bb17000
RBP: e949e0ef0ac0898d R08: 0000000000000000 R09: fffffbfff2039c7a
R10: ffffffff901ce3d7 R11: 0000000000000002 R12: 0000000000000002
R13: 0000000000000003 R14: ffff888025cc8ad8 R15: ffff888025cc8000
might_alloc include/linux/sched/mm.h:318 [inline]
prepare_alloc_pages.constprop.0+0x155/0x560 mm/page_alloc.c:4512
__alloc_pages_noprof+0x190/0x25b0 mm/page_alloc.c:4742
alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2269
folio_alloc_mpol_noprof+0x36/0xd0 mm/mempolicy.c:2287
vma_alloc_folio_noprof+0xee/0x1b0 mm/mempolicy.c:2317
folio_prealloc mm/memory.c:1060 [inline]
alloc_anon_folio mm/memory.c:4752 [inline]
do_anonymous_page mm/memory.c:4809 [inline]
do_pte_missing+0x2017/0x3e00 mm/memory.c:3977
handle_pte_fault mm/memory.c:5801 [inline]
__handle_mm_fault+0x103c/0x2a40 mm/memory.c:5944
handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6112
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: 0033:0x5561e475a823
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:00007ffd62183860 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000338000 RCX: 00000000000b8010
RDX: 0000000000000002 RSI: 00007fc267541000 RDI: 00007fc267208000
RBP: 00007fc266f90010 R08: 00007fc266f90010 R09: 0000000000000000
R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000338000
R13: 00007fc2672c9010 R14: 0000000000330000 R15: 00007ffd62183a18
----------------
Code disassembly (best guess):
0: 7e 83 jle 0xffffff85
2: f8 clc
3: 01 0f add %ecx,(%rdi)
5: 85 fe test %edi,%esi
7: 01 00 add %eax,(%rax)
9: 00 9c 58 f6 c4 02 0f add %bl,0xf02c4f6(%rax,%rbx,2)
10: 85 e9 test %ebp,%ecx
12: 01 00 add %eax,(%rax)
14: 00 48 f7 add %cl,-0x9(%rax)
17: 04 24 add $0x24,%al
19: 00 02 add %al,(%rdx)
1b: 00 00 add %al,(%rax)
1d: 74 01 je 0x20
1f: fb sti
20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
27: fc ff df
* 2a: 48 01 c3 add %rax,%rbx <-- trapping instruction
2d: 48 c7 03 00 00 00 00 movq $0x0,(%rbx)
34: c7 43 08 00 00 00 00 movl $0x0,0x8(%rbx)
3b: 48 rex.W
3c: 8b .byte 0x8b
3d: 84 24 88 test %ah,(%rax,%rcx,4)