==================================================================
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
BUG: KASAN: slab-out-of-bounds in shrink_folio_list+0x141d/0x37d0
Read of size 8 at addr ffff8880456f0da1 by task syz-executor.6/5489

CPU: 1 PID: 5489 Comm: syz-executor.6 Not tainted 6.4.0-next-20230705 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x91/0xf0
 print_report+0xcc/0x620
 kasan_report+0xbe/0xf0
 kasan_check_range+0x39/0x1b0
 shrink_folio_list+0x141d/0x37d0
 reclaim_folio_list+0xc4/0x300
 reclaim_pages+0x377/0x520
 madvise_cold_or_pageout_pte_range+0xc9c/0xf90
 walk_pgd_range+0xcc3/0x1740
 __walk_page_range+0x5f6/0x720
 walk_page_range+0x316/0x4b0
 madvise_pageout+0x30b/0x580
 madvise_vma_behavior+0x413/0x20a0
 do_madvise.part.0+0x39a/0x650
 __x64_sys_madvise+0x10c/0x160
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7f973c81eb19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9739d94188 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f973c931f60 RCX: 00007f973c81eb19
RDX: 0000000000000015 RSI: 0000000000004000 RDI: 0000000020ffa000
RBP: 00007f973c878f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffe0bef4ef R14: 00007f9739d94300 R15: 0000000000022000
 </TASK>

Allocated by task 5486:
 kasan_save_stack+0x22/0x50
 kasan_set_track+0x25/0x30
 __kasan_slab_alloc+0x59/0x70
 kmem_cache_alloc+0x16b/0x370
 __anon_vma_prepare+0x26c/0x500
 __handle_mm_fault+0x250b/0x2d10
 handle_mm_fault+0x1af/0xba0
 do_user_addr_fault+0x4e8/0x10e0
 exc_page_fault+0x9c/0x1a0
 asm_exc_page_fault+0x26/0x30

The buggy address belongs to the object at ffff8880456f0cc0
 which belongs to the cache anon_vma of size 208
The buggy address is located 17 bytes to the right of
 allocated 208-byte region [ffff8880456f0cc0, ffff8880456f0d90)

The buggy address belongs to the physical page:
page:0000000031e8706e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x456f0
memcg:ffff888009666701
anon flags: 0x100000000000200(slab|node=0|zone=1)
page_type: 0xffffffff()
raw: 0100000000000200 ffff8880087a2280 ffffea00006462c0 dead000000000003
raw: 0000000000000000 00000000000f000f 00000001ffffffff ffff888009666701
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880456f0c80: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
 ffff8880456f0d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880456f0d80: 00 00 fc fc fc fc fc fc fc fc 00 00 00 00 00 00
                               ^
 ffff8880456f0e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880456f0e80: 00 00 00 00 fc fc fc fc fc fc fc fc 00 00 00 00
==================================================================
loop5: detected capacity change from 0 to 40
loop7: detected capacity change from 0 to 40
loop7: detected capacity change from 0 to 40
loop6: detected capacity change from 0 to 40
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
perf: interrupt took too long (4032 > 3975), lowering kernel.perf_event_max_sample_rate to 49000
loop5: detected capacity change from 0 to 40
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
loop6: detected capacity change from 0 to 40
loop7: detected capacity change from 0 to 40