EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000.
==================================================================
BUG: KASAN: slab-use-after-free in __xfrm_state_delete+0x81b/0x830
Write of size 8 at addr ffff888032df4030 by task swapper/0/0

CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.16.0-rc5-next-20250711 #1 PREEMPT(voluntary) 
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <IRQ>
 dump_stack_lvl+0xca/0x120
 print_report+0xcb/0x5f0
 kasan_report+0xca/0x100
 __xfrm_state_delete+0x81b/0x830
 xfrm_timer_handler+0x4cc/0xbb0
 __hrtimer_run_queues+0x1ee/0xab0
 hrtimer_run_softirq+0x14c/0x310
 handle_softirqs+0x1b1/0x770
 __irq_exit_rcu+0xc4/0x100
 irq_exit_rcu+0x9/0x20
 sysvec_apic_timer_interrupt+0x70/0x80
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:pv_native_safe_halt+0x1e/0x30
Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 eb 0c 0f 1f 44 00 00 0f 00 2d e9 c5 0c 00 0f 1f 44 00 00 fb f4 <e9> 9d 71 02 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90
RSP: 0018:ffffffff85a07e00 EFLAGS: 00000202
RAX: 0000000000385cef RBX: 0000000000000000 RCX: ffffffff84b8c167
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff814c72d4
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed100d9c630a
R10: ffff88806ce31853 R11: 0000000000000001 R12: ffffffff86439c50
R13: 1ffffffff0b40fc7 R14: 0000000000000000 R15: 0000000000000000
 default_idle+0xe/0x20
 default_idle_call+0x6d/0xb0
 do_idle+0x344/0x490
 cpu_startup_entry+0x4f/0x60
 rest_init+0x164/0x290
 start_kernel+0x3f9/0x510
 x86_64_start_reservations+0x18/0x30
 x86_64_start_kernel+0x109/0x120
 common_startup_64+0x13e/0x148
 </TASK>

Allocated by task 12418:
 kasan_save_stack+0x24/0x50
 kasan_save_track+0x14/0x30
 __kasan_slab_alloc+0x59/0x70
 kmem_cache_alloc_noprof+0x13c/0x470
 xfrm_state_alloc+0x25/0x600
 __find_acq_core+0x9c8/0x27a0
 xfrm_find_acq+0x7f/0xb0
 xfrm_alloc_userspi+0x58b/0xbb0
 xfrm_user_rcv_msg+0x459/0xa00
 netlink_rcv_skb+0x147/0x430
 xfrm_netlink_rcv+0x74/0x90
 netlink_unicast+0x58d/0x850
 netlink_sendmsg+0x8ac/0xd80
 ____sys_sendmsg+0xa67/0xc20
 ___sys_sendmsg+0x10f/0x1b0
 __sys_sendmsg+0x150/0x200
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 302:
 kasan_save_stack+0x24/0x50
 kasan_save_track+0x14/0x30
 kasan_save_free_info+0x3a/0x60
 __kasan_slab_free+0x38/0x50
 kmem_cache_free+0x2a1/0x460
 xfrm_state_gc_task+0x112/0x170
 process_one_work+0x8e1/0x19c0
 worker_thread+0x67e/0xe90
 kthread+0x3c8/0x740
 ret_from_fork+0x34b/0x430
 ret_from_fork_asm+0x1a/0x30

The buggy address belongs to the object at ffff888032df4000
 which belongs to the cache xfrm_state of size 920
The buggy address is located 48 bytes inside of
 freed 920-byte region [ffff888032df4000, ffff888032df4398)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x32df4
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x100000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0100000000000040 ffff88800a81b780 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000
head: 0100000000000040 ffff88800a81b780 dead000000000122 0000000000000000
head: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000
head: 0100000000000002 ffffea0000cb7d01 00000000ffffffff 00000000ffffffff
head: ffff888032df5de0 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888032df3f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888032df3f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888032df4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff888032df4080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888032df4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
random: crng reseeded on system resumption
loop6: detected capacity change from 0 to 4096
random: crng reseeded on system resumption
EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000.
random: crng reseeded on system resumption
loop6: detected capacity change from 0 to 4096
EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
EXT4-fs (loop6): unmounting filesystem 00000000-0000-0000-0000-000000000000.
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	90                   	nop
   2:	90                   	nop
   3:	90                   	nop
   4:	90                   	nop
   5:	90                   	nop
   6:	90                   	nop
   7:	90                   	nop
   8:	90                   	nop
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	f3 0f 1e fa          	endbr64
  10:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  15:	eb 0c                	jmp    0x23
  17:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1c:	0f 00 2d e9 c5 0c 00 	verw   0xcc5e9(%rip)        # 0xcc60c
  23:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  28:	fb                   	sti
  29:	f4                   	hlt
* 2a:	e9 9d 71 02 00       	jmpq   0x271cc <-- trapping instruction
  2f:	66 2e 0f 1f 84 00 00 	nopw   %cs:0x0(%rax,%rax,1)
  36:	00 00 00
  39:	0f 1f 00             	nopl   (%rax)
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop