==================================================================
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 ffffc9000b0a7b88 by task syz-executor.5/11364

CPU: 0 PID: 11364 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:__unix_dgram_recvmsg+0x481/0xb90 net/unix/af_unix.c:2530
Code: 08 00 00 00 00 c7 40 14 00 00 00 00 48 8b 84 24 20 01 00 00 65 48 2b 04 25 28 00 00 00 0f 85 19 06 00 00 48 81 c4 28 01 00 00 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 ec b3 b6 f8 49 8d bc
RSP: 0018:ffffc9000b0a79a0 EFLAGS: 00000296
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000d463000
RDX: 0000000000040000 RSI: ffffffff88cdefbe RDI: ffffc9000b0a77c0
RBP: ffff88807c451280 R08: 0000000000000001 R09: ffffc9000b0a77c7
R10: fffff52001614ef8 R11: 0000000000000000 R12: ffff888053958000
R13: 0000000000000000 R14: 0000000000000000 R15: ffffc9000b0a7940
 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0000:___sys_recvmsg+0x0/0x180 net/socket.c:2755
Code: 00 00 75 1d 48 81 c4 a0 00 00 00 44 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 41 bc f2 ff ff ff eb b0 e8 d4 14 0a 02 0f 1f 40 00 <48> b8 00 00 00 00 00 fc ff df 41 57 45 89 c7 41 56 49 89 f6 41 55
RSP: 0000:1ffff110053d1895 EFLAGS: 00000000 ORIG_RAX: ffffffff8bfc5030
RAX: 00000000202a6580 RBX: eb9e7312b3760400 RCX: 000000000000a993
RDX: ffffffff880c7ba2 RSI: ffff88804b653000 RDI: 0000000041b58ab3
RBP: 0000000000000000 R08: ffffc9000b0a7db0 R09: 0000000000000002
R10: 0000000000000000 R11: 1ffff92001614f6e R12: ffffffff8a16912d
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

The buggy address belongs to stack of task syz-executor.5/11364
 and is located at offset 24 in frame:
 ___sys_recvmsg+0x0/0x180 net/socket.c:2446

This frame has 3 objects:
 [32, 40) 'iov'
 [64, 72) 'uaddr'
 [96, 224) 'iovstack'

The buggy address belongs to the virtual mapping at
 [ffffc9000b0a0000, ffffc9000b0a9000) created by:
 kernel_clone+0xeb/0xa10 kernel/fork.c:2684

The buggy address belongs to the physical page:
page:ffffea00017a1b00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e86c
memcg:ffff888026aea602
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff ffff888026aea602
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 11349, tgid 11349 (syz-executor.5), ts 894726194087, free_ts 894572927741
 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
 vfree+0x180/0x7e0 mm/vmalloc.c:2741
 vb2_vmalloc_put drivers/media/common/videobuf2/videobuf2-vmalloc.c:69 [inline]
 vb2_vmalloc_put+0x8e/0xd0 drivers/media/common/videobuf2/videobuf2-vmalloc.c:64
 __vb2_buf_mem_free+0x154/0x2c0 drivers/media/common/videobuf2/videobuf2-core.c:266
 __vb2_free_mem drivers/media/common/videobuf2/videobuf2-core.c:492 [inline]
 __vb2_queue_free+0x6c0/0x920 drivers/media/common/videobuf2/videobuf2-core.c:521
 vb2_core_reqbufs+0x23a/0xed0 drivers/media/common/videobuf2/videobuf2-core.c:784
 __vb2_cleanup_fileio+0xed/0x180 drivers/media/common/videobuf2/videobuf2-core.c:2751
 vb2_core_queue_release+0x1e/0x80 drivers/media/common/videobuf2/videobuf2-core.c:2468
 vb2_queue_release drivers/media/common/videobuf2/videobuf2-v4l2.c:934 [inline]
 _vb2_fop_release+0x1c5/0x280 drivers/media/common/videobuf2/videobuf2-v4l2.c:1119
 vivid_fop_release+0x18f/0xcb0 drivers/media/test-drivers/vivid/vivid-core.c:665
 v4l2_release+0x230/0x450 drivers/media/v4l2-core/v4l2-dev.c:456
 __fput+0x27c/0xa90 fs/file_table.c:321
 task_work_run+0x16f/0x270 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xb42/0x2b60 kernel/exit.c:869
 do_group_exit+0xd4/0x2a0 kernel/exit.c:1019

Memory state around the buggy address:
 ffffc9000b0a7a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f3 f3
 ffffc9000b0a7b00: f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1
>ffffc9000b0a7b80: f1 f1 00 f2 f2 f2 00 f2 f2 f2 00 00 00 00 00 00
                      ^
 ffffc9000b0a7c00: 00 00 00 00 00 00 00 00 00 00 f3 f3 f3 f3 00 00
 ffffc9000b0a7c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
   0:	08 00                	or     %al,(%rax)
   2:	00 00                	add    %al,(%rax)
   4:	00 c7                	add    %al,%bh
   6:	40 14 00             	adc    $0x0,%al
   9:	00 00                	add    %al,(%rax)
   b:	00 48 8b             	add    %cl,-0x75(%rax)
   e:	84 24 20             	test   %ah,(%rax,%riz,1)
  11:	01 00                	add    %eax,(%rax)
  13:	00 65 48             	add    %ah,0x48(%rbp)
  16:	2b 04 25 28 00 00 00 	sub    0x28,%eax
  1d:	0f 85 19 06 00 00    	jne    0x63c
  23:	48 81 c4 28 01 00 00 	add    $0x128,%rsp
* 2a:	44 89 e8             	mov    %r13d,%eax <-- trapping instruction
  2d:	5b                   	pop    %rbx
  2e:	5d                   	pop    %rbp
  2f:	41 5c                	pop    %r12
  31:	41 5d                	pop    %r13
  33:	41 5e                	pop    %r14
  35:	41 5f                	pop    %r15
  37:	c3                   	retq
  38:	e8 ec b3 b6 f8       	callq  0xf8b6b429
  3d:	49                   	rex.WB
  3e:	8d                   	.byte 0x8d
  3f:	bc                   	.byte 0xbc