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BUG: KASAN: use-after-free in cleancache_fs_enabled_mapping include/linux/cleancache.h:56 [inline]
BUG: KASAN: use-after-free in cleancache_invalidate_page include/linux/cleancache.h:110 [inline]
BUG: KASAN: use-after-free in unaccount_page_cache_page+0x9e0/0xac0 mm/filemap.c:175
Read of size 4 at addr ffff8881075ce470 by task kswapd0/39

CPU: 1 PID: 39 Comm: kswapd0 Tainted: G        W         5.10.238-syzkaller-00282-gd76d4cd0623a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x169/0x1d8 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0xe2/0x130 mm/kasan/report.c:452
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
 cleancache_fs_enabled_mapping include/linux/cleancache.h:56 [inline]
 cleancache_invalidate_page include/linux/cleancache.h:110 [inline]
 unaccount_page_cache_page+0x9e0/0xac0 mm/filemap.c:175
 __delete_from_page_cache+0xc4/0x460 mm/filemap.c:243
 __remove_mapping+0x562/0x690 mm/vmscan.c:985
 shrink_page_list+0x2109/0x4120 mm/vmscan.c:1498
 shrink_inactive_list+0x4f4/0xe80 mm/vmscan.c:2075
 shrink_list mm/vmscan.c:2294 [inline]
 shrink_lruvec+0x2246/0x2770 mm/vmscan.c:5473
 shrink_node_memcgs mm/vmscan.c:5660 [inline]
 shrink_node+0xf0c/0x2690 mm/vmscan.c:5690
 kswapd_shrink_node mm/vmscan.c:6444 [inline]
 balance_pgdat mm/vmscan.c:6601 [inline]
 kswapd+0x154e/0x2f90 mm/vmscan.c:6858
 kthread+0x346/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

Allocated by task 21684:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 __kasan_slab_alloc+0xbd/0xf0 mm/kasan/common.c:463
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:583
 slab_alloc_node mm/slub.c:2947 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc+0x165/0x2e0 mm/slub.c:2960
 skb_clone+0x1e9/0x380 net/core/skbuff.c:1467
 dev_queue_xmit_nit+0x194/0xa40 net/core/dev.c:2350
 xmit_one net/core/dev.c:3603 [inline]
 dev_hard_start_xmit+0x163/0x670 net/core/dev.c:3624
 __dev_queue_xmit+0x1446/0x2540 net/core/dev.c:4210
 dev_queue_xmit+0x17/0x20 net/core/dev.c:4243
 __bpf_tx_skb net/core/filter.c:2128 [inline]
 __bpf_redirect_common net/core/filter.c:2176 [inline]
 __bpf_redirect+0x9f9/0xe30 net/core/filter.c:2183
 ____bpf_clone_redirect net/core/filter.c:2469 [inline]
 bpf_clone_redirect+0x242/0x380 net/core/filter.c:2441
 bpf_prog_0b0c548f0763ca60+0x59/0xe8
 bpf_dispatcher_nop_func include/linux/bpf.h:669 [inline]
 bpf_test_run+0x310/0x9b0 net/bpf/test_run.c:116
 bpf_prog_test_run_skb+0x9c2/0x10b0 net/bpf/test_run.c:635
 bpf_prog_test_run+0x350/0x3c0 kernel/bpf/syscall.c:3156
 __do_sys_bpf kernel/bpf/syscall.c:4453 [inline]
 __se_sys_bpf+0x49f/0x680 kernel/bpf/syscall.c:4391
 __x64_sys_bpf+0x7b/0x90 kernel/bpf/syscall.c:4391
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Freed by task 21684:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1595 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1621
 slab_free mm/slub.c:3203 [inline]
 kmem_cache_free+0x100/0x2d0 mm/slub.c:3219
 kfree_skbmem+0x10c/0x180 net/core/skbuff.c:-1
 __kfree_skb net/core/skbuff.c:695 [inline]
 kfree_skb+0xc1/0x2f0 net/core/skbuff.c:713
 packet_rcv_spkt+0x391/0x490 net/packet/af_packet.c:-1
 dev_queue_xmit_nit+0x9c3/0xa40 net/core/dev.c:2382
 xmit_one net/core/dev.c:3603 [inline]
 dev_hard_start_xmit+0x163/0x670 net/core/dev.c:3624
 __dev_queue_xmit+0x1446/0x2540 net/core/dev.c:4210
 dev_queue_xmit+0x17/0x20 net/core/dev.c:4243
 __bpf_tx_skb net/core/filter.c:2128 [inline]
 __bpf_redirect_common net/core/filter.c:2176 [inline]
 __bpf_redirect+0x9f9/0xe30 net/core/filter.c:2183
 ____bpf_clone_redirect net/core/filter.c:2469 [inline]
 bpf_clone_redirect+0x242/0x380 net/core/filter.c:2441
 bpf_prog_0b0c548f0763ca60+0x59/0xe8
 bpf_dispatcher_nop_func include/linux/bpf.h:669 [inline]
 bpf_test_run+0x310/0x9b0 net/bpf/test_run.c:116
 bpf_prog_test_run_skb+0x9c2/0x10b0 net/bpf/test_run.c:635
 bpf_prog_test_run+0x350/0x3c0 kernel/bpf/syscall.c:3156
 __do_sys_bpf kernel/bpf/syscall.c:4453 [inline]
 __se_sys_bpf+0x49f/0x680 kernel/bpf/syscall.c:4391
 __x64_sys_bpf+0x7b/0x90 kernel/bpf/syscall.c:4391
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

The buggy address belongs to the object at ffff8881075ce3c0
 which belongs to the cache skbuff_head_cache of size 248
The buggy address is located 176 bytes inside of
 248-byte region [ffff8881075ce3c0, ffff8881075ce4b8)
The buggy address belongs to the page:
page:ffffea00041d7380 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1075ce
flags: 0x4000000000000200(slab)
raw: 4000000000000200 dead000000000100 dead000000000122 ffff888107d95980
raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 21684, ts 1027309692226, free_ts 1020692953902
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x179/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x2235/0x23d0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x268/0x5f0 mm/page_alloc.c:5357
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1808 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1869
 new_slab_objects mm/slub.c:2627 [inline]
 ___slab_alloc+0x2a6/0x450 mm/slub.c:2791
 __slab_alloc+0x63/0xa0 mm/slub.c:2831
 slab_alloc_node mm/slub.c:2913 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc+0x1af/0x2e0 mm/slub.c:2960
 skb_clone+0x1e9/0x380 net/core/skbuff.c:1467
 ____bpf_clone_redirect net/core/filter.c:2454 [inline]
 bpf_clone_redirect+0xa7/0x380 net/core/filter.c:2441
 bpf_prog_0b0c548f0763ca60+0x59/0xe8
 bpf_dispatcher_nop_func include/linux/bpf.h:669 [inline]
 bpf_test_run+0x310/0x9b0 net/bpf/test_run.c:116
 bpf_prog_test_run_skb+0x9c2/0x10b0 net/bpf/test_run.c:635
 bpf_prog_test_run+0x350/0x3c0 kernel/bpf/syscall.c:3156
 __do_sys_bpf kernel/bpf/syscall.c:4453 [inline]
 __se_sys_bpf+0x49f/0x680 kernel/bpf/syscall.c:4391
 __x64_sys_bpf+0x7b/0x90 kernel/bpf/syscall.c:4391
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 __free_pages_ok+0x7fc/0x820 mm/page_alloc.c:1629
 free_the_page mm/page_alloc.c:5418 [inline]
 __free_pages+0xdd/0x380 mm/page_alloc.c:5427
 __free_slab+0xcf/0x190 mm/slub.c:1894
 free_slab mm/slub.c:1909 [inline]
 discard_slab mm/slub.c:1915 [inline]
 unfreeze_partials+0x15f/0x190 mm/slub.c:2410
 put_cpu_partial+0xc1/0x180 mm/slub.c:2446
 __slab_free+0x2c9/0x3a0 mm/slub.c:3095
 do_slab_free mm/slub.c:3191 [inline]
 ___cache_free+0x111/0x130 mm/slub.c:3210
 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x14a/0x160 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xf0 mm/kasan/common.c:440
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:583
 slab_alloc_node mm/slub.c:2947 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc+0x165/0x2e0 mm/slub.c:2960
 kmem_cache_zalloc include/linux/slab.h:654 [inline]
 journal_alloc_journal_head fs/jbd2/journal.c:2698 [inline]
 jbd2_journal_add_journal_head+0x92/0x590 fs/jbd2/journal.c:2767
 jbd2_journal_get_create_access+0x4c/0x4b0 fs/jbd2/transaction.c:1253
 __ext4_journal_get_create_access+0x95/0x300 fs/ext4/ext4_jbd2.c:314

Memory state around the buggy address:
 ffff8881075ce300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc
 ffff8881075ce380: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
>ffff8881075ce400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff8881075ce480: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc
 ffff8881075ce500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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