==================================================================
BUG: KASAN: slab-use-after-free in __lock_acquire+0x2de0/0x3cb0 kernel/locking/lockdep.c:5007
Read of size 8 at addr ffff8880787fa418 by task kworker/0:4/5849

CPU: 0 UID: 0 PID: 5849 Comm: kworker/0:4 Not tainted 6.11.0-rc5-syzkaller-00057-g86987d84b968 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: wg-crypt-wg0 wg_packet_encrypt_worker
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 __lock_acquire+0x2de0/0x3cb0 kernel/locking/lockdep.c:5007
 lock_acquire kernel/locking/lockdep.c:5759 [inline]
 lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
 p9_tag_remove net/9p/client.c:397 [inline]
 p9_req_put net/9p/client.c:405 [inline]
 p9_req_put+0xaf/0x250 net/9p/client.c:402
 req_done+0x1e7/0x2f0 net/9p/trans_virtio.c:147
 vring_interrupt drivers/virtio/virtio_ring.c:2595 [inline]
 vring_interrupt+0x31b/0x400 drivers/virtio/virtio_ring.c:2570
 __handle_irq_event_percpu+0x229/0x7c0 kernel/irq/handle.c:158
 handle_irq_event_percpu kernel/irq/handle.c:193 [inline]
 handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210
 handle_edge_irq+0x263/0xd10 kernel/irq/chip.c:831
 generic_handle_irq_desc include/linux/irqdesc.h:173 [inline]
 handle_irq arch/x86/kernel/irq.c:247 [inline]
 call_irq_handler arch/x86/kernel/irq.c:259 [inline]
 __common_interrupt+0xdf/0x250 arch/x86/kernel/irq.c:285
 common_interrupt+0xab/0xd0 arch/x86/kernel/irq.c:278
 </IRQ>
 <TASK>
 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
RIP: 0010:preempt_schedule_irq+0x4c/0x90 kernel/sched/core.c:6851
Code: df 55 65 48 8b 2d 54 06 fd 74 53 48 89 eb 48 c1 eb 03 48 01 c3 bf 01 00 00 00 e8 8f c3 54 f6 e8 3a 8c 8b f6 fb bf 01 00 00 00 <e8> 4f a3 ff ff 9c 58 fa f6 c4 02 75 1e bf 01 00 00 00 e8 bd 67 54
RSP: 0018:ffffc900207c72e8 EFLAGS: 00000202
RAX: 000000000012acd9 RBX: ffffed1002d75488 RCX: 1ffffffff28c409f
RDX: 0000000000000000 RSI: ffffffff8b4cd060 RDI: 0000000000000001
RBP: ffff888016baa440 R08: 0000000000000001 R09: fffffbfff28b6b02
R10: ffffffff945b5817 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 irqentry_exit+0x36/0x90 kernel/entry/common.c:354
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:get_unaligned_le32 include/asm-generic/unaligned.h:32 [inline]
RIP: 0010:chacha_load_key lib/crypto/chacha20poly1305.c:33 [inline]
RIP: 0010:chacha20poly1305_crypt_sg_inplace+0x400/0xb50 lib/crypto/chacha20poly1305.c:239
Code: c2 84 c9 0f 95 c0 84 c2 0f 85 35 07 00 00 41 8b 47 18 49 8d 7f 1c 48 b9 00 00 00 00 00 fc ff df 89 84 24 e8 00 00 00 48 89 f8 <48> c1 e8 03 0f b6 14 08 49 8d 47 1f 48 89 c6 48 c1 ee 03 0f b6 0c
RSP: 0018:ffffc900207c73b0 EFLAGS: 00000246
RAX: ffff88805780a03c RBX: dffffc0000000000 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff88805780a03c
RBP: ffffc900207c7718 R08: 0000000000000007 R09: 000000007fffffff
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000075 R14: 0000000000000000 R15: ffff88805780a020
 chacha20poly1305_encrypt_sg_inplace+0x3e/0x50 lib/crypto/chacha20poly1305.c:338
 encrypt_packet+0x720/0x8e0 drivers/net/wireguard/send.c:216
 wg_packet_encrypt_worker+0x2ec/0xb60 drivers/net/wireguard/send.c:297
 process_one_work+0x958/0x1ad0 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xed0 kernel/workqueue.c:3389
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Allocated by task 14000:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387
 kmalloc_noprof include/linux/slab.h:681 [inline]
 p9_client_create+0xcf/0x11b0 net/9p/client.c:983
 v9fs_session_init+0x1f8/0x1a80 fs/9p/v9fs.c:410
 v9fs_mount+0xc6/0xa50 fs/9p/vfs_super.c:122
 legacy_get_tree+0x109/0x220 fs/fs_context.c:662
 vfs_get_tree+0x8f/0x380 fs/super.c:1800
 do_new_mount fs/namespace.c:3472 [inline]
 path_mount+0x6e1/0x1f10 fs/namespace.c:3799
 do_mount fs/namespace.c:3812 [inline]
 __do_sys_mount fs/namespace.c:4020 [inline]
 __se_sys_mount fs/namespace.c:3997 [inline]
 __ia32_sys_mount+0x292/0x310 fs/namespace.c:3997
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Freed by task 14000:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2252 [inline]
 slab_free mm/slub.c:4473 [inline]
 kfree+0x12a/0x3b0 mm/slub.c:4594
 p9_client_create+0x9ca/0x11b0 net/9p/client.c:1054
 v9fs_session_init+0x1f8/0x1a80 fs/9p/v9fs.c:410
 v9fs_mount+0xc6/0xa50 fs/9p/vfs_super.c:122
 legacy_get_tree+0x109/0x220 fs/fs_context.c:662
 vfs_get_tree+0x8f/0x380 fs/super.c:1800
 do_new_mount fs/namespace.c:3472 [inline]
 path_mount+0x6e1/0x1f10 fs/namespace.c:3799
 do_mount fs/namespace.c:3812 [inline]
 __do_sys_mount fs/namespace.c:4020 [inline]
 __se_sys_mount fs/namespace.c:3997 [inline]
 __ia32_sys_mount+0x292/0x310 fs/namespace.c:3997
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

The buggy address belongs to the object at ffff8880787fa400
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 24 bytes inside of
 freed 512-byte region [ffff8880787fa400, ffff8880787fa600)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x787f8
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 04fff00000000040 ffff888015842c80 ffffea0001afea00 dead000000000002
raw: 0000000000000000 0000000080100010 00000001fdffffff 0000000000000000
head: 04fff00000000040 ffff888015842c80 ffffea0001afea00 dead000000000002
head: 0000000000000000 0000000080100010 00000001fdffffff 0000000000000000
head: 04fff00000000002 ffffea0001e1fe01 ffffffffffffffff 0000000000000000
head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 13740, tgid 13732 (syz.1.2024), ts 698422727570, free_ts 698099890988
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1493
 prep_new_page mm/page_alloc.c:1501 [inline]
 get_page_from_freelist+0x1351/0x2e50 mm/page_alloc.c:3439
 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4695
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 alloc_slab_page+0x4e/0xf0 mm/slub.c:2321
 allocate_slab mm/slub.c:2484 [inline]
 new_slab+0x84/0x260 mm/slub.c:2537
 ___slab_alloc+0xdac/0x1870 mm/slub.c:3723
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3813
 __slab_alloc_node mm/slub.c:3866 [inline]
 slab_alloc_node mm/slub.c:4025 [inline]
 __do_kmalloc_node mm/slub.c:4157 [inline]
 __kmalloc_noprof+0x379/0x410 mm/slub.c:4170
 kmalloc_noprof include/linux/slab.h:685 [inline]
 kzalloc_noprof include/linux/slab.h:807 [inline]
 copy_splice_read+0x1a8/0xb80 fs/splice.c:339
 do_splice_read fs/splice.c:984 [inline]
 do_splice_read+0x2cf/0x380 fs/splice.c:959
 splice_direct_to_actor+0x2a4/0xa40 fs/splice.c:1089
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0x17e/0x250 fs/splice.c:1233
 do_sendfile+0xb1e/0xe50 fs/read_write.c:1295
 __do_compat_sys_sendfile fs/read_write.c:1383 [inline]
 __se_compat_sys_sendfile fs/read_write.c:1366 [inline]
 __ia32_compat_sys_sendfile+0x1e7/0x230 fs/read_write.c:1366
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
page last free pid 13733 tgid 13732 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1094 [inline]
 free_unref_page+0x64a/0xe40 mm/page_alloc.c:2612
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3988 [inline]
 slab_alloc_node mm/slub.c:4037 [inline]
 kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4044
 ptlock_alloc+0x1f/0x70 mm/memory.c:6589
 ptlock_init include/linux/mm.h:2940 [inline]
 pagetable_pte_ctor include/linux/mm.h:2967 [inline]
 __pte_alloc_one_noprof include/asm-generic/pgalloc.h:73 [inline]
 pte_alloc_one+0x74/0x370 arch/x86/mm/pgtable.c:33
 __pte_alloc+0x6e/0x3a0 mm/memory.c:448
 do_anonymous_page mm/memory.c:4523 [inline]
 do_pte_missing mm/memory.c:3945 [inline]
 handle_pte_fault mm/memory.c:5521 [inline]
 __handle_mm_fault+0x4e15/0x5350 mm/memory.c:5664
 handle_mm_fault+0x44e/0x7b0 mm/memory.c:5832
 faultin_page mm/gup.c:1194 [inline]
 __get_user_pages+0x475/0x15c0 mm/gup.c:1493
 __get_user_pages_locked mm/gup.c:1760 [inline]
 __gup_longterm_locked+0x22e/0x1b30 mm/gup.c:2489
 pin_user_pages_remote+0xee/0x150 mm/gup.c:3528
 process_vm_rw_single_vec mm/process_vm_access.c:106 [inline]
 process_vm_rw_core.constprop.0+0x439/0x9f0 mm/process_vm_access.c:216
 process_vm_rw+0x301/0x360 mm/process_vm_access.c:284
 __do_sys_process_vm_readv mm/process_vm_access.c:296 [inline]
 __se_sys_process_vm_readv mm/process_vm_access.c:292 [inline]
 __ia32_sys_process_vm_readv+0xdf/0x1b0 mm/process_vm_access.c:292

Memory state around the buggy address:
 ffff8880787fa300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880787fa380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880787fa400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff8880787fa480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880787fa500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
   0:	df 55 65             	fists  0x65(%rbp)
   3:	48 8b 2d 54 06 fd 74 	mov    0x74fd0654(%rip),%rbp        # 0x74fd065e
   a:	53                   	push   %rbx
   b:	48 89 eb             	mov    %rbp,%rbx
   e:	48 c1 eb 03          	shr    $0x3,%rbx
  12:	48 01 c3             	add    %rax,%rbx
  15:	bf 01 00 00 00       	mov    $0x1,%edi
  1a:	e8 8f c3 54 f6       	call   0xf654c3ae
  1f:	e8 3a 8c 8b f6       	call   0xf68b8c5e
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 4f a3 ff ff       	call   0xffffa37e <-- trapping instruction
  2f:	9c                   	pushf
  30:	58                   	pop    %rax
  31:	fa                   	cli
  32:	f6 c4 02             	test   $0x2,%ah
  35:	75 1e                	jne    0x55
  37:	bf 01 00 00 00       	mov    $0x1,%edi
  3c:	e8                   	.byte 0xe8
  3d:	bd                   	.byte 0xbd
  3e:	67 54                	addr32 push %rsp