==================================================================
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 ffffc900150b7b88 by task syz-executor.0/6163

CPU: 1 PID: 6163 Comm: syz-executor.0 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:ffffc900150b76f0 EFLAGS: 00000206
RAX: 000000000007aba9 RBX: ffff88807c6bba80 RCX: 1ffffffff1cf0bc1
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900150b7738 R08: 0000000000000001 R09: 0000000000000001
R10: fffffbfff1cf11ca R11: 0000000000000000 R12: ffff8880b993c280
R13: ffff88807c6b8000 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:__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 7c 77 b6 f8 49 8d bc
RSP: 0018:ffffc900150b79a0 EFLAGS: 00000296
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90003f92000
RDX: 0000000000040000 RSI: ffffffff88ce2bee RDI: ffffc900150b77c0
RBP: ffff888022384280 R08: 0000000000000001 R09: ffffc900150b77c7
R10: fffff52002a16ef8 R11: 0000000000000000 R12: ffff88805da7f000
R13: 0000000000000000 R14: 0000000000000000 R15: ffffc900150b7940
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:650
RIP: 0046:___sys_recvmsg+0x0/0x180 net/socket.c:2755
RSP: 8164e53d:0000000000000001 EFLAGS: 00000000 ORIG_RAX: ffffffff8bfc3808
RAX: 0000000020246e80 RBX: 200eb098b4359b00 RCX: 00000000000091b7
RDX: ffffffff880cbb32 RSI: ffff888059097200 RDI: 0000000041b58ab3
RBP: 0000000000000000 R08: ffffc900150b7db0 R09: 0000000000000002
R10: 0000000000000000 R11: 1ffff92002a16f6e R12: ffffffff8a1611ad
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

The buggy address belongs to stack of task syz-executor.0/6163
 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
 [ffffc900150b0000, ffffc900150b9000) created by:
 kernel_clone+0xeb/0xa10 kernel/fork.c:2684

The buggy address belongs to the physical page:
page:ffffea0001e93d80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7a4f6
memcg:ffff88802b2a1c82
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff ffff88802b2a1c82
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 6041, tgid 6041 (syz-executor.2), ts 237093795400, free_ts 163049968984
 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
 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]
 kmem_cache_alloc_node+0x183/0x350 mm/slub.c:3497
 __alloc_skb+0x288/0x330 net/core/skbuff.c:598
 alloc_skb include/linux/skbuff.h:1273 [inline]
 nlmsg_new include/net/netlink.h:1003 [inline]
 netlink_ack+0x357/0x1360 net/netlink/af_netlink.c:2511
 netlink_rcv_skb+0x34f/0x440 net/netlink/af_netlink.c:2580
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1942
 sock_sendmsg_nosec net/socket.c:722 [inline]
 sock_sendmsg+0xde/0x190 net/socket.c:745
 __sys_sendto+0x23a/0x340 net/socket.c:2145
 __do_sys_sendto net/socket.c:2157 [inline]
 __se_sys_sendto net/socket.c:2153 [inline]
 __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2153
 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:
 ffffc900150b7a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f3 f3
 ffffc900150b7b00: f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1
>ffffc900150b7b80: f1 f1 00 f2 f2 f2 00 f2 f2 f2 00 00 00 00 00 00
                      ^
 ffffc900150b7c00: 00 00 00 00 00 00 00 00 00 00 f3 f3 f3 f3 00 00
 ffffc900150b7c80: 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