==================================================================
BUG: KASAN: stack-out-of-bounds in user_mode arch/x86/include/asm/ptrace.h:136 [inline]
BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x17fc/0x1ef0 arch/x86/kernel/unwind_orc.c:455
Read of size 8 at addr ffffc90007837a78 by task syz-executor.5/10582

CPU: 1 PID: 10582 Comm: syz-executor.5 Not tainted 6.2.0-next-20230221-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319
 print_report mm/kasan/report.c:430 [inline]
 kasan_report+0x11c/0x130 mm/kasan/report.c:536
 user_mode arch/x86/include/asm/ptrace.h:136 [inline]
 unwind_next_frame+0x17fc/0x1ef0 arch/x86/kernel/unwind_orc.c:455
 arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x90/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:491
 irq_work_queue_on+0xd6/0x1a0 kernel/irq_work.c:140
 irq_work_single+0x1e4/0x260 kernel/irq_work.c:211
 __flush_smp_call_function_queue+0x4a3/0xad0 kernel/smp.c:668
 __sysvec_call_function_single+0xce/0x4f0 arch/x86/kernel/smp.c:248
 sysvec_call_function_single+0x92/0xc0 arch/x86/kernel/smp.c:243
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:finish_task_switch.isra.0+0x2bf/0xc80 kernel/sched/core.c:5183
Code: 8b 3a 4c 89 e7 48 c7 02 00 00 00 00 ff d1 4d 85 ff 75 bf 4c 89 e7 e8 10 f8 ff ff e8 eb 8f 32 00 fb 65 48 8b 1c 25 80 b8 03 00 <48> 8d bb 50 15 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0018:ffffc90007837730 EFLAGS: 00000206
RAX: 0000000000002e81 RBX: ffff888022333a80 RCX: 1ffffffff229e096
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90007837778 R08: 0000000000000001 R09: ffffffff914eab8f
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880b993c280
R13: ffff88803e0f3a80 R14: 0000000000000000 R15: 0000000000000000
 context_switch kernel/sched/core.c:5307 [inline]
 __schedule+0x24bc/0x5ac0 kernel/sched/core.c:6622
 preempt_schedule_irq+0x52/0x90 kernel/sched/core.c:6934
 irqentry_exit+0x35/0x80 kernel/entry/common.c:432
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:650
RIP: 0010:phonet_device_notify+0x4d4/0x840 net/phonet/pn_dev.c:285
Code: 8b 84 24 b0 00 00 00 65 48 2b 04 25 28 00 00 00 0f 85 70 03 00 00 48 81 c4 b8 00 00 00 31 c0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 <e8> f7 81 31 f8 49 8d bd 30 01 00 00 48 b8 00 00 00 00 00 fc ff df
RSP: 0018:ffffc900078379e8 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 0000000000000005 RCX: ffffffff89531dd9
RDX: ffff888022333a80 RSI: 0000000000000000 RDI: 0000000000000007
RBP: ffffc90007837bb8 R08: 0000000000000007 R09: 0000000000000006
R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88807a384000 R14: 0000000000000000 R15: ffffffff8e3f7c40
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:650
RIP: 0005:ax25_device_event+0x6f/0x650 net/ax25/af_ax25.c:155
RSP: 891676ad:0000000000040000 EFLAGS: ffffc9000c7ed000 ORIG_RAX: ffffffff8918c610
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff89156842
RDX: 00000000ffffffc4 RSI: 0000000000000005 RDI: 0000000000000000
RBP: ffffffff89531d30 R08: ffffffff8e317880 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8a20144a R12: ffffffff8bfe5a80
R13: 0000000041b58ab3 R14: 0000000000000000 R15: 1ffff92000f06f40
 </TASK>

The buggy address belongs to stack of task syz-executor.5/10582
 and is located at offset 120 in frame:
 phonet_device_notify+0x0/0x840 include/linux/rculist.h:106

This frame has 2 objects:
 [32, 40) 'deleted'
 [64, 81) 'req'

The buggy address belongs to the virtual mapping at
 [ffffc90007830000, ffffc90007839000) created by:
 kernel_clone+0xeb/0xa10 kernel/fork.c:2684

The buggy address belongs to the physical page:
page:ffffea0000984040 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x26101
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 10568, tgid 10568 (syz-executor.5), ts 903808577400, free_ts 901830474066
 prep_new_page mm/page_alloc.c:2552 [inline]
 get_page_from_freelist+0x11bb/0x2d50 mm/page_alloc.c:4339
 __alloc_pages+0x1cb/0x5c0 mm/page_alloc.c:5605
 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2283
 vm_area_alloc_pages mm/vmalloc.c:2942 [inline]
 __vmalloc_area_node mm/vmalloc.c:3010 [inline]
 __vmalloc_node_range+0xb8a/0x1300 mm/vmalloc.c:3180
 alloc_thread_stack_node kernel/fork.c:311 [inline]
 dup_task_struct kernel/fork.c:984 [inline]
 copy_process+0x1320/0x76c0 kernel/fork.c:2100
 kernel_clone+0xeb/0xa10 kernel/fork.c:2684
 __do_sys_clone+0xba/0x100 kernel/fork.c:2825
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1453 [inline]
 free_pcp_prepare+0x4de/0x930 mm/page_alloc.c:1503
 free_unref_page_prepare mm/page_alloc.c:3401 [inline]
 free_unref_page+0x1d/0x490 mm/page_alloc.c:3496
 __unfreeze_partials+0x17c/0x1a0 mm/slub.c:2637
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:186 [inline]
 slab_post_alloc_hook mm/slab.h:769 [inline]
 slab_alloc_node mm/slub.c:3452 [inline]
 slab_alloc mm/slub.c:3460 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3467 [inline]
 kmem_cache_alloc+0x175/0x320 mm/slub.c:3476
 kmem_cache_zalloc include/linux/slab.h:710 [inline]
 alloc_buffer_head+0x24/0x150 fs/buffer.c:2947
 alloc_page_buffers+0x284/0x790 fs/buffer.c:872
 grow_dev_page fs/buffer.c:1008 [inline]
 grow_buffers fs/buffer.c:1054 [inline]
 __getblk_slow+0x5ce/0x1110 fs/buffer.c:1081
 __getblk_gfp+0x72/0x80 fs/buffer.c:1376
 __getblk include/linux/buffer_head.h:414 [inline]
 jbd2_journal_get_descriptor_buffer+0x10e/0x410 fs/jbd2/journal.c:1018
 jbd2_journal_commit_transaction+0x25da/0x6a70 fs/jbd2/commit.c:615
 kjournald2+0x1d4/0x890 fs/jbd2/journal.c:209
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Memory state around the buggy address:
 ffffc90007837900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90007837980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90007837a00: f1 f1 f1 f1 00 f2 f2 f2 00 00 01 f3 f3 f3 f3 f3
                                                                ^
 ffffc90007837a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90007837b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
   0:	8b 3a                	mov    (%rdx),%edi
   2:	4c 89 e7             	mov    %r12,%rdi
   5:	48 c7 02 00 00 00 00 	movq   $0x0,(%rdx)
   c:	ff d1                	callq  *%rcx
   e:	4d 85 ff             	test   %r15,%r15
  11:	75 bf                	jne    0xffffffd2
  13:	4c 89 e7             	mov    %r12,%rdi
  16:	e8 10 f8 ff ff       	callq  0xfffff82b
  1b:	e8 eb 8f 32 00       	callq  0x32900b
  20:	fb                   	sti
  21:	65 48 8b 1c 25 80 b8 	mov    %gs:0x3b880,%rbx
  28:	03 00
* 2a:	48 8d bb 50 15 00 00 	lea    0x1550(%rbx),%rdi <-- trapping instruction
  31:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  38:	fc ff df
  3b:	48 89 fa             	mov    %rdi,%rdx
  3e:	48                   	rex.W
  3f:	c1                   	.byte 0xc1