================================================================== 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+0x6d8/0x750 mm/filemap.c:163 Read of size 4 at addr ffff888121011470 by task syz-executor.3/32457 CPU: 1 PID: 32457 Comm: syz-executor.3 Not tainted 5.15.148-syzkaller-00718-g993bed180178 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description+0x87/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:444 __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+0x6d8/0x750 mm/filemap.c:163 __delete_from_page_cache+0xc6/0x5b0 mm/filemap.c:231 __remove_mapping+0x566/0x690 mm/vmscan.c:1201 shrink_page_list+0x2723/0x5c50 mm/vmscan.c:1798 shrink_inactive_list mm/vmscan.c:2305 [inline] shrink_list mm/vmscan.c:2550 [inline] shrink_lruvec+0x17ec/0x4580 mm/vmscan.c:5753 shrink_node_memcgs mm/vmscan.c:5945 [inline] shrink_node+0x1077/0x24e0 mm/vmscan.c:5975 shrink_zones mm/vmscan.c:6178 [inline] do_try_to_free_pages+0x5ca/0x1570 mm/vmscan.c:6236 try_to_free_pages+0x3a5/0xd70 mm/vmscan.c:6471 __perform_reclaim mm/page_alloc.c:4948 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:4971 [inline] __alloc_pages_slowpath+0x160a/0x3860 mm/page_alloc.c:5394 __alloc_pages+0x503/0x8f0 mm/page_alloc.c:5789 __alloc_pages_node include/linux/gfp.h:591 [inline] alloc_pages_node include/linux/gfp.h:605 [inline] bpf_ringbuf_area_alloc kernel/bpf/ringbuf.c:96 [inline] bpf_ringbuf_alloc+0xd0/0x3d0 kernel/bpf/ringbuf.c:133 ringbuf_map_alloc+0x202/0x320 kernel/bpf/ringbuf.c:172 find_and_alloc_map kernel/bpf/syscall.c:129 [inline] map_create+0x411/0x2050 kernel/bpf/syscall.c:857 __sys_bpf+0x296/0x760 kernel/bpf/syscall.c:4609 __do_sys_bpf kernel/bpf/syscall.c:4731 [inline] __se_sys_bpf kernel/bpf/syscall.c:4729 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:4729 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fcc83a71da9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fcc827f30c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fcc83b9ff80 RCX: 00007fcc83a71da9 RDX: 0000000000000048 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00007fcc83abe47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fcc83b9ff80 R15: 00007ffdf9604308 Allocated by task 32185: 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:433 [inline] ____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:512 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] kmem_cache_alloc_trace+0x115/0x210 mm/slub.c:3267 kmalloc include/linux/slab.h:603 [inline] kzalloc include/linux/slab.h:733 [inline] btf_parse kernel/bpf/btf.c:4337 [inline] btf_new_fd+0x11e/0x910 kernel/bpf/btf.c:5881 bpf_btf_load+0x6f/0x90 kernel/bpf/syscall.c:4028 __sys_bpf+0x50e/0x760 kernel/bpf/syscall.c:4672 __do_sys_bpf kernel/bpf/syscall.c:4731 [inline] __se_sys_bpf kernel/bpf/syscall.c:4729 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:4729 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb Freed by task 32185: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x126/0x160 mm/kasan/common.c:365 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:193 [inline] slab_free_hook mm/slub.c:1723 [inline] slab_free_freelist_hook+0xbd/0x190 mm/slub.c:1749 slab_free mm/slub.c:3519 [inline] kfree+0xc8/0x220 mm/slub.c:4579 btf_verifier_env_free kernel/bpf/btf.c:1590 [inline] btf_parse kernel/bpf/btf.c:4402 [inline] btf_new_fd+0x44b/0x910 kernel/bpf/btf.c:5881 bpf_btf_load+0x6f/0x90 kernel/bpf/syscall.c:4028 __sys_bpf+0x50e/0x760 kernel/bpf/syscall.c:4672 __do_sys_bpf kernel/bpf/syscall.c:4731 [inline] __se_sys_bpf kernel/bpf/syscall.c:4729 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:4729 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 insert_work+0x56/0x320 kernel/workqueue.c:1373 __queue_work+0x92a/0xcd0 kernel/workqueue.c:1539 queue_work_on+0x105/0x170 kernel/workqueue.c:1566 queue_work include/linux/workqueue.h:510 [inline] schedule_work include/linux/workqueue.h:571 [inline] destroy_super_rcu+0xd1/0xe0 fs/super.c:172 rcu_do_batch+0x57a/0xc10 kernel/rcu/tree.c:2523 rcu_core+0x517/0x1020 kernel/rcu/tree.c:2763 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2776 __do_softirq+0x26d/0x5bf kernel/softirq.c:565 Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0xf0 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 __call_rcu kernel/rcu/tree.c:3007 [inline] call_rcu+0x133/0x12a0 kernel/rcu/tree.c:3087 __put_super+0x26d/0x2e0 fs/super.c:299 put_super fs/super.c:313 [inline] deactivate_locked_super+0xe1/0x110 fs/super.c:346 mount_bdev+0x29e/0x3b0 fs/super.c:1389 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4578 legacy_get_tree+0xf1/0x190 fs/fs_context.c:611 vfs_get_tree+0x88/0x290 fs/super.c:1517 do_new_mount+0x2ba/0xb30 fs/namespace.c:3005 path_mount+0x671/0x1070 fs/namespace.c:3335 do_mount fs/namespace.c:3348 [inline] __do_sys_mount fs/namespace.c:3556 [inline] __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3533 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3533 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff888121011000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1136 bytes inside of 2048-byte region [ffff888121011000, ffff888121011800) The buggy address belongs to the page: page:ffffea0004840400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x121010 head:ffffea0004840400 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043200 raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 2656, ts 638627160340, free_ts 638123000685 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2604 prep_new_page+0x1b/0x110 mm/page_alloc.c:2610 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4484 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5776 allocate_slab mm/slub.c:1932 [inline] new_slab+0x9a/0x4e0 mm/slub.c:1995 ___slab_alloc+0x39e/0x830 mm/slub.c:3028 __slab_alloc+0x4a/0x90 mm/slub.c:3115 slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3248 [inline] __kmalloc_track_caller+0x16c/0x260 mm/slub.c:4945 kmalloc_reserve net/core/skbuff.c:357 [inline] __alloc_skb+0x10c/0x550 net/core/skbuff.c:428 alloc_skb include/linux/skbuff.h:1183 [inline] nlmsg_new include/net/netlink.h:953 [inline] rtmsg_ifinfo_build_skb+0x7f/0x180 net/core/rtnetlink.c:3863 unregister_netdevice_many+0xea2/0x17c0 net/core/dev.c:11109 default_device_exit_batch+0x38a/0x3f0 net/core/dev.c:11638 ops_exit_list net/core/net_namespace.c:174 [inline] cleanup_net+0x6ce/0xc00 net/core/net_namespace.c:596 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472 kthread+0x421/0x510 kernel/kthread.c:337 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1471 [inline] free_pcp_prepare mm/page_alloc.c:1543 [inline] free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3533 free_unref_page+0xe8/0x750 mm/page_alloc.c:3615 free_the_page mm/page_alloc.c:804 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5852 __free_slab+0xec/0x1d0 mm/slub.c:2020 free_slab mm/slub.c:2035 [inline] discard_slab mm/slub.c:2041 [inline] __unfreeze_partials+0x165/0x1a0 mm/slub.c:2527 put_cpu_partial+0xc4/0x120 mm/slub.c:2607 __slab_free+0x1c8/0x290 mm/slub.c:3388 do_slab_free mm/slub.c:3507 [inline] ___cache_free+0x109/0x120 mm/slub.c:3526 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x44/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550 slab_alloc_node mm/slub.c:3240 [inline] slab_alloc mm/slub.c:3248 [inline] kmem_cache_alloc+0xf5/0x200 mm/slub.c:3253 kmem_cache_zalloc include/linux/slab.h:723 [inline] alloc_buffer_head+0x26/0x110 fs/buffer.c:3311 alloc_page_buffers+0x192/0x390 fs/buffer.c:832 Memory state around the buggy address: ffff888121011300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888121011380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888121011400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888121011480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888121011500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================