================================================================== 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 ffff88810fdc9470 by task syz-executor.3/28775 CPU: 1 PID: 28775 Comm: syz-executor.3 Not tainted 5.15.127-syzkaller-00378-gee6126f60d89 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 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:1200 shrink_page_list+0x2723/0x5c50 mm/vmscan.c:1797 shrink_inactive_list mm/vmscan.c:2304 [inline] shrink_list mm/vmscan.c:2549 [inline] shrink_lruvec+0x17ec/0x4580 mm/vmscan.c:5752 shrink_node_memcgs mm/vmscan.c:5944 [inline] shrink_node+0x1077/0x24e0 mm/vmscan.c:5974 shrink_zones mm/vmscan.c:6177 [inline] do_try_to_free_pages+0x5b6/0x1570 mm/vmscan.c:6235 try_to_free_pages+0x3a5/0xd70 mm/vmscan.c:6470 __perform_reclaim mm/page_alloc.c:4946 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:4969 [inline] __alloc_pages_slowpath+0x160a/0x3860 mm/page_alloc.c:5392 __alloc_pages+0x386/0x5e0 mm/page_alloc.c:5786 __vmalloc_area_node mm/vmalloc.c:2951 [inline] __vmalloc_node_range+0x482/0x8d0 mm/vmalloc.c:3082 __bpf_map_area_alloc kernel/bpf/syscall.c:328 [inline] bpf_map_area_alloc+0xd9/0xf0 kernel/bpf/syscall.c:335 queue_stack_map_alloc+0xc3/0x200 kernel/bpf/queue_stack_maps.c:76 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:4600 __do_sys_bpf kernel/bpf/syscall.c:4722 [inline] __se_sys_bpf kernel/bpf/syscall.c:4720 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:4720 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: 0033:0x7f780633bae9 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:00007f78050be0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f780645af80 RCX: 00007f780633bae9 RDX: 0000000000000048 RSI: 0000000020000140 RDI: 0000000000000000 RBP: 00007f780638747a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f780645af80 R15: 00007ffcdac9cbc8 Allocated by task 425: 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_slab_alloc+0xb1/0xe0 mm/kasan/common.c:466 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 getname_flags+0xba/0x520 fs/namei.c:138 user_path_at_empty+0x2d/0x1a0 fs/namei.c:2852 user_path_at include/linux/namei.h:57 [inline] do_faccessat+0x39f/0x860 fs/open.c:423 __do_sys_faccessat2 fs/open.c:477 [inline] __se_sys_faccessat2 fs/open.c:474 [inline] __x64_sys_faccessat2+0x9a/0xb0 fs/open.c:474 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 425: 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] kmem_cache_free+0x116/0x2e0 mm/slub.c:3535 putname fs/namei.c:270 [inline] user_path_at_empty+0x14e/0x1a0 fs/namei.c:2855 user_path_at include/linux/namei.h:57 [inline] do_faccessat+0x39f/0x860 fs/open.c:423 __do_sys_faccessat2 fs/open.c:477 [inline] __se_sys_faccessat2 fs/open.c:474 [inline] __x64_sys_faccessat2+0x9a/0xb0 fs/open.c:474 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 ffff88810fdc9100 which belongs to the cache names_cache of size 4096 The buggy address is located 880 bytes inside of 4096-byte region [ffff88810fdc9100, ffff88810fdca100) The buggy address belongs to the page: page:ffffea00043f7200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10fdc8 head:ffffea00043f7200 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 0000000000000000 dead000000000122 ffff8881001bed80 raw: 0000000000000000 0000000000070007 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 425, ts 1138692309562, free_ts 1138650098290 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2602 prep_new_page+0x1b/0x110 mm/page_alloc.c:2608 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4482 __alloc_pages+0x206/0x5e0 mm/page_alloc.c:5773 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] kmem_cache_alloc+0x134/0x200 mm/slub.c:3253 getname_flags+0xba/0x520 fs/namei.c:138 getname+0x19/0x20 fs/namei.c:217 do_sys_openat2+0xd7/0x830 fs/open.c:1228 do_sys_open fs/open.c:1250 [inline] __do_sys_openat fs/open.c:1266 [inline] __se_sys_openat fs/open.c:1261 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1261 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 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1469 [inline] free_pcp_prepare mm/page_alloc.c:1541 [inline] free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3531 free_unref_page+0xe6/0x730 mm/page_alloc.c:3613 free_the_page mm/page_alloc.c:802 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5849 __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 sock_alloc_inode+0x1b/0xb0 net/socket.c:303 alloc_inode fs/inode.c:236 [inline] new_inode_pseudo+0x64/0x220 fs/inode.c:937 Memory state around the buggy address: ffff88810fdc9300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88810fdc9380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88810fdc9400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88810fdc9480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88810fdc9500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================