RBP: 00007ff6f93a61d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fffadc22bef R14: 00007ff6f93a6300 R15: 0000000000022000
 </TASK>
==================================================================
BUG: KASAN: slab-use-after-free in flush_tlb_func+0x24d/0x560
Write of size 8 at addr ffff8880154e7a40 by task swapper/1/0

CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.16.0-rc4-next-20250630 #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/0x670
 kasan_report+0xca/0x100
 kasan_check_range+0x39/0x1b0
 flush_tlb_func+0x24d/0x560
 __flush_smp_call_function_queue+0x20d/0x740
 __sysvec_call_function_single+0x6d/0x360
 sysvec_call_function_single+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+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 89 34 0d 00 0f 1f 44 00 00 fb f4 <e9> 7d 6d 02 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90
RSP: 0018:ffff888009717e58 EFLAGS: 00000202
RAX: 00000000008a3cfb RBX: 0000000000000001 RCX: ffffffff84b84987
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff814c6b04
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed100d9e630a
R10: ffff88806cf31853 R11: 0000000000000001 R12: ffffffff86438650
R13: 1ffff110012e2fd2 R14: 0000000000000000 R15: 0000000000000000
 default_idle+0xe/0x20
 default_idle_call+0x6d/0xb0
 do_idle+0x344/0x490
 cpu_startup_entry+0x4f/0x60
 start_secondary+0x1bd/0x210
 common_startup_64+0x13e/0x148
 </TASK>

Allocated by task 13553:
 kasan_save_stack+0x24/0x50
 kasan_save_track+0x14/0x30
 __kasan_slab_alloc+0x59/0x70
 kmem_cache_alloc_noprof+0x13c/0x470
 mm_alloc+0x1d/0xd0
 alloc_bprm+0x2e3/0x6e0
 do_execveat_common+0x235/0x770
 __x64_sys_execve+0x95/0xc0
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 259:
 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
 finish_task_switch.isra.0+0x478/0x840
 __schedule+0xe4e/0x3520
 schedule+0xdb/0x390
 schedule_hrtimeout_range_clock+0x11f/0x310
 do_epoll_wait+0xca8/0xf00
 do_compat_epoll_pwait.part.0+0x29/0x1d0
 __x64_sys_epoll_pwait+0x1de/0x320
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8880154e70c0
 which belongs to the cache mm_struct of size 2456
The buggy address is located 2432 bytes inside of
 freed 2456-byte region [ffff8880154e70c0, ffff8880154e7a58)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x154e0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88800974a581
flags: 0x100000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0100000000000040 ffff888008c4bc80 dead000000000100 dead000000000122
raw: 0000000000000000 00000000800c000c 00000000f5000000 ffff88800974a581
head: 0100000000000040 ffff888008c4bc80 dead000000000100 dead000000000122
head: 0000000000000000 00000000800c000c 00000000f5000000 ffff88800974a581
head: 0100000000000003 ffffea0000553801 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880154e7900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880154e7980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880154e7a00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
                                           ^
 ffff8880154e7a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880154e7b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
----------------
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 89 34 0d 00 	verw   0xd3489(%rip)        # 0xd34ac
  23:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  28:	fb                   	sti
  29:	f4                   	hlt
* 2a:	e9 7d 6d 02 00       	jmpq   0x26dac <-- 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