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BUG: KASAN: slab-use-after-free in __do_sys_io_cancel fs/aio.c:2207 [inline]
BUG: KASAN: slab-use-after-free in __se_sys_io_cancel fs/aio.c:2174 [inline]
BUG: KASAN: slab-use-after-free in __arm64_sys_io_cancel+0xec/0x184 fs/aio.c:2174
Read at addr f6ff00002fd48aa0 by task syz-executor.1/22309
Pointer tag: [f6], memory tag: [fe]

CPU: 0 PID: 22309 Comm: syz-executor.1 Not tainted 6.8.0-rc7-syzkaller-00020-g5847c9777c30 #0
Hardware name: linux,dummy-virt (DT)
Call trace:
 dump_backtrace+0x94/0xec arch/arm64/kernel/stacktrace.c:291
 show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:298
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x48/0x60 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x108/0x618 mm/kasan/report.c:488
 kasan_report+0x88/0xac mm/kasan/report.c:601
 report_tag_fault arch/arm64/mm/fault.c:334 [inline]
 do_tag_recovery arch/arm64/mm/fault.c:346 [inline]
 __do_kernel_fault+0x17c/0x1e8 arch/arm64/mm/fault.c:393
 do_bad_area arch/arm64/mm/fault.c:493 [inline]
 do_tag_check_fault+0x78/0x8c arch/arm64/mm/fault.c:772
 do_mem_abort+0x44/0x94 arch/arm64/mm/fault.c:848
 el1_abort+0x40/0x60 arch/arm64/kernel/entry-common.c:398
 el1h_64_sync_handler+0xd8/0xe4 arch/arm64/kernel/entry-common.c:458
 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:593
 __do_sys_io_cancel fs/aio.c:2207 [inline]
 __se_sys_io_cancel fs/aio.c:2174 [inline]
 __arm64_sys_io_cancel+0xec/0x184 fs/aio.c:2174
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x48/0x114 arch/arm64/kernel/syscall.c:51
 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:155
 el0_svc+0x34/0xd8 arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:598

Allocated by task 22309:
 kasan_save_stack+0x3c/0x64 mm/kasan/common.c:47
 save_stack_info+0x40/0x158 mm/kasan/tags.c:106
 kasan_save_alloc_info+0x14/0x20 mm/kasan/tags.c:142
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 unpoison_slab_object mm/kasan/common.c:301 [inline]
 __kasan_slab_alloc+0x94/0xcc mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3813 [inline]
 slab_alloc_node mm/slub.c:3860 [inline]
 kmem_cache_alloc+0x114/0x2c4 mm/slub.c:3867
 aio_get_req fs/aio.c:1060 [inline]
 io_submit_one+0xe4/0x714 fs/aio.c:2050
 __do_sys_io_submit fs/aio.c:2113 [inline]
 __se_sys_io_submit fs/aio.c:2083 [inline]
 __arm64_sys_io_submit+0x128/0x1a4 fs/aio.c:2083
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x48/0x114 arch/arm64/kernel/syscall.c:51
 el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:155
 el0_svc+0x34/0xd8 arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:598

Freed by task 22266:
 kasan_save_stack+0x3c/0x64 mm/kasan/common.c:47
 save_stack_info+0x40/0x158 mm/kasan/tags.c:106
 kasan_save_free_info+0x18/0x24 mm/kasan/tags.c:147
 poison_slab_object+0x164/0x1ac mm/kasan/common.c:240
 __kasan_slab_free+0x30/0x48 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2121 [inline]
 slab_free mm/slub.c:4299 [inline]
 kmem_cache_free+0xd0/0x334 mm/slub.c:4363
 iocb_destroy fs/aio.c:1112 [inline]
 iocb_put fs/aio.c:1212 [inline]
 iocb_put fs/aio.c:1208 [inline]
 aio_poll_complete_work+0x1d8/0x244 fs/aio.c:1767
 process_one_work+0x148/0x258 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x2b4/0x3cc kernel/workqueue.c:2787
 kthread+0x114/0x118 kernel/kthread.c:388
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860

The buggy address belongs to the object at ffff00002fd48a80
 which belongs to the cache skbuff_ext_cache of size 192
The buggy address is located 32 bytes inside of
 192-byte region [ffff00002fd48a80, ffff00002fd48b40)

The buggy address belongs to the physical page:
page:00000000d5d5394c refcount:1 mapcount:0 mapping:0000000000000000 index:0xf7ff00002fd48d80 pfn:0x6fd48
anon flags: 0x1ffc00000000800(slab|node=0|zone=0|lastcpupid=0x7ff|kasantag=0x0)
page_type: 0xffffffff()
raw: 01ffc00000000800 fdff000002c47a00 fffffc0000a19b80 0000000000000005
raw: f7ff00002fd48d80 0000000080150011 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff00002fd48800: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
 ffff00002fd48900: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
>ffff00002fd48a00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
                                                 ^
 ffff00002fd48b00: fe fe fe fe f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4 f4
 ffff00002fd48c00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
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