R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007fffbf90080f R14: 00007faf253f3300 R15: 0000000000022000
 </TASK>
==================================================================
BUG: KASAN: slab-use-after-free in iput.part.0+0x9c/0xeb0
Write of size 4 at addr ffff8880571edec0 by task syz-executor.4/39018

CPU: 0 UID: 0 PID: 39018 Comm: syz-executor.4 Not tainted 6.18.0-rc7-next-20251127 #1 PREEMPT(voluntary) 
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xca/0x120
 print_report+0xcb/0x610
 kasan_report+0xca/0x100
 kasan_check_range+0x39/0x1b0
 iput.part.0+0x9c/0xeb0
 iput+0x35/0x40
 __sock_release+0x20b/0x270
 __sys_socket+0x274/0x2e0
 __x64_sys_socket+0x73/0xb0
 do_syscall_64+0xbf/0x420
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faf27e7db19
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:00007faf253f3128 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007faf27f90f60 RCX: 00007faf27e7db19
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000024
RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007fffbf90080f R14: 00007faf253f3300 R15: 0000000000022000
 </TASK>

Allocated by task 39018:
 kasan_save_stack+0x24/0x50
 kasan_save_track+0x14/0x30
 __kasan_slab_alloc+0x59/0x70
 kmem_cache_alloc_lru_noprof+0x217/0x720
 sock_alloc_inode+0x27/0x1d0
 alloc_inode+0x67/0x250
 sock_alloc+0x40/0x270
 __sock_create+0xc1/0x810
 __sys_socket+0x145/0x2e0
 __x64_sys_socket+0x73/0xb0
 do_syscall_64+0xbf/0x420
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 68:
 kasan_save_stack+0x24/0x50
 kasan_save_track+0x14/0x30
loop2: detected capacity change from 0 to 2048
 kasan_save_free_info+0x3a/0x60
 __kasan_slab_free+0x43/0x70
 kmem_cache_free+0x2cd/0x660
 i_callback+0x46/0x70
 rcu_core+0x73c/0x1ed0
 handle_softirqs+0x1b1/0x740
 __irq_exit_rcu+0xc4/0x100
 irq_exit_rcu+0x9/0x20
 sysvec_apic_timer_interrupt+0x70/0x80
 asm_sysvec_apic_timer_interrupt+0x1a/0x20

Last potentially related work creation:
 kasan_save_stack+0x24/0x50
 kasan_record_aux_stack+0x89/0xa0
 __call_rcu_common.constprop.0+0x70/0xad0
 destroy_inode+0x12b/0x1b0
 evict+0x4fe/0x9e0
 iput.part.0+0x7ea/0xeb0
 iput+0x35/0x40
 __sock_release+0x20b/0x270
 sock_alloc_file+0x1bf/0x220
 __sys_socket+0x1be/0x2e0
 __x64_sys_socket+0x73/0xb0
 do_syscall_64+0xbf/0x420
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8880571edc00
 which belongs to the cache sock_inode_cache of size 1344
The buggy address is located 704 bytes inside of
 freed 1344-byte region [ffff8880571edc00, ffff8880571ee140)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x571e8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888055fd6301
flags: 0x100000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0100000000000040 ffff8880096cbdc0 ffffea00013b7600 0000000000000002
raw: 0000000000000000 0000000080160016 00000000f5000000 ffff888055fd6301
head: 0100000000000040 ffff8880096cbdc0 ffffea00013b7600 0000000000000002
head: 0000000000000000 0000000080160016 00000000f5000000 ffff888055fd6301
head: 0100000000000003 ffffea00015c7a01 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880571edd80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880571ede00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880571ede80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff8880571edf00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880571edf80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
workqueue: Failed to create a rescuer kthread for wq "ext4-rsv-conversion": -EINTR
EXT4-fs: failed to create workqueue
EXT4-fs (loop2): mount failed