==================================================================
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 ffffc9001525fa78 by task syz-executor.5/13890

CPU: 1 PID: 13890 Comm: syz-executor.5 Not tainted 6.2.0-rc8-next-20230220-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 ab 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:ffffc9001525f730 EFLAGS: 00000206
RAX: 000000000000d287 RBX: ffff88801c190000 RCX: 1ffffffff229d896
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9001525f778 R08: 0000000000000001 R09: ffffffff914e6b8f
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880b993c280
R13: ffff8880193d8000 R14: 0000000000000000 R15: ffff8880b993ccb8
 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> 27 4d 31 f8 49 8d bd 30 01 00 00 48 b8 00 00 00 00 00 fc ff df
RSP: 0018:ffffc9001525f9e8 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 0000000000000005 RCX: ffffffff89535269
RDX: ffff88801c190000 RSI: 0000000000000000 RDI: 0000000000000007
RBP: ffffc9001525fbb8 R08: 0000000000000007 R09: 0000000000000006
R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff8880396c6000 R14: 0000000000000000 R15: ffffffff8e3f79c0
 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: 8916b17d:ffff88801c190000 EFLAGS: ffffffff81561bc8 ORIG_RAX: ffffffff891900e0
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8915a312
RDX: 00000000ffffffc1 RSI: 0000000000000005 RDI: 00000000ffffffc1
RBP: ffffffff895351c0 R08: ffffffff8e31c780 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8a20144a R12: ffffffff8bfe40e8
R13: 0000000041b58ab3 R14: 0000000000000000 R15: 1ffff92002a4bf40
 </TASK>

The buggy address belongs to stack of task syz-executor.5/13890
 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
 [ffffc90015258000, ffffc90015261000) created by:
 kernel_clone+0xeb/0xa10 kernel/fork.c:2684

The buggy address belongs to the physical page:
page:ffffea0000751440 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1d451
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 13883, tgid 13883 (syz-executor.5), ts 2123156449090, free_ts 2121878478450
 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
 __folio_put_small mm/swap.c:106 [inline]
 __folio_put+0xc5/0x140 mm/swap.c:129
 folio_put include/linux/mm.h:1309 [inline]
 put_page include/linux/mm.h:1378 [inline]
 anon_pipe_buf_release+0x3fb/0x4c0 fs/pipe.c:138
 pipe_buf_release include/linux/pipe_fs_i.h:203 [inline]
 pipe_read+0x614/0x1110 fs/pipe.c:324
 call_read_iter include/linux/fs.h:1845 [inline]
 new_sync_read fs/read_write.c:389 [inline]
 vfs_read+0x7fa/0x930 fs/read_write.c:470
 ksys_read+0x1ec/0x250 fs/read_write.c:613
 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

Memory state around the buggy address:
 ffffc9001525f900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9001525f980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9001525fa00: f1 f1 f1 f1 00 f2 f2 f2 00 00 01 f3 f3 f3 f3 f3
                                                                ^
 ffffc9001525fa80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9001525fb00: 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 ab 8f 32 00       	callq  0x328fcb
  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