program syz-executor.2 is using a deprecated SCSI ioctl, please convert it to SG_IO
kmemleak: 4 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
==================================================================
BUG: KASAN: use-after-free in dst_destroy+0x30b/0x350
Read of size 8 at addr ffff888018065df0 by task swapper/1/0

CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.18.0-rc4-next-20220428 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
 <IRQ>
 dump_stack_lvl+0x8b/0xb3
 print_report.cold+0x5e/0x5db
 kasan_report+0xbe/0x1c0
 dst_destroy+0x30b/0x350
 rcu_core+0x7e5/0x1ff0
 __do_softirq+0x270/0x8c7
 __irq_exit_rcu+0x113/0x170
 irq_exit_rcu+0x5/0x20
 sysvec_apic_timer_interrupt+0x8e/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:default_idle+0xb/0x10
Code: ff ff ff 48 89 df e8 b4 cf 5d fd e9 55 ff ff ff 4c 89 e7 e8 a7 cf 5d fd eb 96 0f 1f 44 00 00 eb 07 0f 00 2d 77 c1 48 00 fb f4 <c3> cc cc cc cc 41 55 41 54 55 48 89 fd 53 48 83 ec 08 e8 fe 9b 2a
RSP: 0018:ffff88800821fe58 EFLAGS: 00000202
RAX: ffffffff8419ac20 RBX: ffff8880081ed040 RCX: ffffffff8417d0b1
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000001 R09: ffff88806cf38d13
R10: ffffed100d9e71a2 R11: 0000000000000001 R12: ffffed100103da08
R13: ffffffff858ef1d0 R14: 0000000000000000 R15: dffffc0000000000
 default_idle_call+0x80/0xc0
 do_idle+0x3b9/0x530
 cpu_startup_entry+0x14/0x20
 start_secondary+0x1cf/0x230
 secondary_startup_64_no_verify+0xe0/0xeb
 </TASK>

Allocated by task 304:
 kasan_save_stack+0x1e/0x40
 __kasan_slab_alloc+0x66/0x80
 kmem_cache_alloc+0x1aa/0x480
 copy_net_ns+0x125/0x760
 create_new_namespaces+0x3f6/0xb30
 unshare_nsproxy_namespaces+0xc1/0x1f0
 ksys_unshare+0x445/0x8d0
 __x64_sys_unshare+0x2d/0x40
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Last potentially related work creation:
 kasan_save_stack+0x1e/0x40
 __kasan_record_aux_stack+0x97/0xa0
 insert_work+0x44/0x290
 __queue_work+0x61f/0x10a0
 call_timer_fn+0x182/0x600
 __run_timers.part.0+0x4ad/0xa50
 run_timer_softirq+0x143/0x1a0
 __do_softirq+0x270/0x8c7

Second to last potentially related work creation:
 kasan_save_stack+0x1e/0x40
 __kasan_record_aux_stack+0x97/0xa0
 insert_work+0x44/0x290
 __queue_work+0x61f/0x10a0
 call_timer_fn+0x182/0x600
 __run_timers.part.0+0x4ad/0xa50
 run_timer_softirq+0x143/0x1a0
 __do_softirq+0x270/0x8c7

The buggy address belongs to the object at ffff888018065600
 which belongs to the cache net_namespace of size 5248
The buggy address is located 2032 bytes inside of
 5248-byte region [ffff888018065600, ffff888018066a80)

The buggy address belongs to the physical page:
page:0000000055810e42 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888018065600 pfn:0x18060
head:0000000055810e42 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff88800d35d501
flags: 0x100000000010200(slab|head|node=0|zone=1)
raw: 0100000000010200 ffffea00011c8600 dead000000000002 ffff88800802f140
raw: ffff888018065600 0000000080050004 00000001ffffffff ffff88800d35d501
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888018065c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888018065d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888018065d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff888018065e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888018065e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
program syz-executor.2 is using a deprecated SCSI ioctl, please convert it to SG_IO
program syz-executor.2 is using a deprecated SCSI ioctl, please convert it to SG_IO
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	ff 48 89             	decl   -0x77(%rax)
   3:	df e8                	fucomip %st(0),%st
   5:	b4 cf                	mov    $0xcf,%ah
   7:	5d                   	pop    %rbp
   8:	fd                   	std
   9:	e9 55 ff ff ff       	jmpq   0xffffff63
   e:	4c 89 e7             	mov    %r12,%rdi
  11:	e8 a7 cf 5d fd       	callq  0xfd5dcfbd
  16:	eb 96                	jmp    0xffffffae
  18:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1d:	eb 07                	jmp    0x26
  1f:	0f 00 2d 77 c1 48 00 	verw   0x48c177(%rip)        # 0x48c19d
  26:	fb                   	sti
  27:	f4                   	hlt
* 28:	c3                   	retq <-- trapping instruction
  29:	cc                   	int3
  2a:	cc                   	int3
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	41 55                	push   %r13
  2f:	41 54                	push   %r12
  31:	55                   	push   %rbp
  32:	48 89 fd             	mov    %rdi,%rbp
  35:	53                   	push   %rbx
  36:	48 83 ec 08          	sub    $0x8,%rsp
  3a:	e8                   	.byte 0xe8
  3b:	fe                   	(bad)
  3c:	9b                   	fwait
  3d:	2a                   	.byte 0x2a