================================================================== 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+0x9d2/0xa90 mm/filemap.c:175 Read of size 4 at addr ffff88810f109470 by task syz-executor.3/26725 CPU: 0 PID: 26725 Comm: syz-executor.3 Not tainted 5.10.149-syzkaller-01350-g0118fb827bc7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118 print_address_description+0x81/0x3c0 mm/kasan/report.c:233 __kasan_report mm/kasan/report.c:419 [inline] kasan_report+0x1a4/0x1f0 mm/kasan/report.c:436 __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+0x9d2/0xa90 mm/filemap.c:175 __delete_from_page_cache+0xd2/0x620 mm/filemap.c:243 __remove_mapping+0x581/0x6a0 mm/vmscan.c:962 shrink_page_list+0x2991/0x3c60 mm/vmscan.c:1485 shrink_inactive_list+0x38f/0xcd0 mm/vmscan.c:2016 shrink_list mm/vmscan.c:2240 [inline] shrink_lruvec+0x4ad/0xa50 mm/vmscan.c:2558 shrink_node_memcgs+0x44f/0x9a0 mm/vmscan.c:2751 shrink_node+0xce1/0x1b30 mm/vmscan.c:2868 shrink_zones+0x48d/0x960 mm/vmscan.c:3071 do_try_to_free_pages+0x217/0xa50 mm/vmscan.c:3127 try_to_free_mem_cgroup_pages+0x3a2/0x840 mm/vmscan.c:3445 memory_high_write+0x220/0x390 mm/memcontrol.c:6378 cgroup_file_write+0x28e/0x590 kernel/cgroup/cgroup.c:3853 kernfs_fop_write_iter+0x2d0/0x410 fs/kernfs/file.c:296 call_write_iter include/linux/fs.h:1952 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0xc4a/0xf80 fs/read_write.c:605 ksys_write+0x198/0x2c0 fs/read_write.c:658 __do_sys_write fs/read_write.c:670 [inline] __se_sys_write fs/read_write.c:667 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:667 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 RIP: 0033:0x7f6014d8a639 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6013abc168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f6014eab120 RCX: 00007f6014d8a639 RDX: 0000000000000012 RSI: 0000000020000300 RDI: 0000000000000007 RBP: 00007f6014de57e1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffec09e5b4f R14: 00007f6013abc300 R15: 0000000000022000 Allocated by task 160: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:428 [inline] __kasan_slab_alloc+0xb2/0xe0 mm/kasan/common.c:461 kasan_slab_alloc include/linux/kasan.h:259 [inline] slab_post_alloc_hook include/../mm/slab.h:583 [inline] slab_alloc_node mm/slub.c:2956 [inline] slab_alloc mm/slub.c:2964 [inline] kmem_cache_alloc+0x16c/0x300 mm/slub.c:2969 getname_flags+0xba/0x510 fs/namei.c:141 getname+0x19/0x20 fs/namei.c:212 do_sys_openat2+0xd2/0x470 fs/open.c:1205 do_sys_open fs/open.c:1227 [inline] __do_sys_openat fs/open.c:1243 [inline] __se_sys_openat fs/open.c:1238 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1238 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 Freed by task 160: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:46 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:357 ____kasan_slab_free+0x121/0x160 mm/kasan/common.c:360 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:368 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:1604 [inline] slab_free_freelist_hook+0xcc/0x1a0 mm/slub.c:1630 slab_free mm/slub.c:3212 [inline] kmem_cache_free+0xa9/0x1f0 mm/slub.c:3228 putname+0xf8/0x150 fs/namei.c:262 do_sys_openat2+0x397/0x470 fs/open.c:1220 do_sys_open fs/open.c:1227 [inline] __do_sys_openat fs/open.c:1243 [inline] __se_sys_openat fs/open.c:1238 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1238 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 The buggy address belongs to the object at ffff88810f109100 which belongs to the cache names_cache of size 4096 The buggy address is located 880 bytes inside of 4096-byte region [ffff88810f109100, ffff88810f10a100) The buggy address belongs to the page: page:ffffea00043c4200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10f108 head:ffffea00043c4200 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x8000000000010200(slab|head) raw: 8000000000010200 dead000000000100 dead000000000122 ffff88810017cc00 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 160, ts 1771975158335, free_ts 1771688865374 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2386 [inline] prep_new_page mm/page_alloc.c:2392 [inline] get_page_from_freelist+0x755/0x810 mm/page_alloc.c:4073 __alloc_pages_nodemask+0x3b6/0x890 mm/page_alloc.c:5160 alloc_slab_page mm/slub.c:1815 [inline] allocate_slab+0x78/0x540 mm/slub.c:1817 new_slab mm/slub.c:1878 [inline] new_slab_objects mm/slub.c:2636 [inline] ___slab_alloc+0x131/0x2e0 mm/slub.c:2800 __slab_alloc+0x63/0xa0 mm/slub.c:2840 slab_alloc_node mm/slub.c:2922 [inline] slab_alloc mm/slub.c:2964 [inline] kmem_cache_alloc+0x1ef/0x300 mm/slub.c:2969 getname_flags+0xba/0x510 fs/namei.c:141 getname+0x19/0x20 fs/namei.c:212 do_sys_openat2+0xd2/0x470 fs/open.c:1205 do_sys_open fs/open.c:1227 [inline] __do_sys_openat fs/open.c:1243 [inline] __se_sys_openat fs/open.c:1238 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1238 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 page last free stack trace: reset_page_owner include/linux/page_owner.h:28 [inline] free_pages_prepare mm/page_alloc.c:1332 [inline] __free_pages_ok+0x7f8/0x830 mm/page_alloc.c:1612 free_the_page mm/page_alloc.c:5221 [inline] __free_pages+0x383/0x570 mm/page_alloc.c:5228 __free_slab+0xd3/0x190 mm/slub.c:1903 free_slab mm/slub.c:1918 [inline] discard_slab mm/slub.c:1924 [inline] unfreeze_partials+0x17d/0x1b0 mm/slub.c:2419 put_cpu_partial+0xc8/0x190 mm/slub.c:2455 __slab_free+0x2d8/0x3a0 mm/slub.c:3104 do_slab_free mm/slub.c:3200 [inline] ___cache_free+0x11f/0x140 mm/slub.c:3219 qlink_free+0x38/0x40 mm/kasan/quarantine.c:146 qlist_free_all+0x4c/0xc0 mm/kasan/quarantine.c:165 kasan_quarantine_reduce+0x15a/0x170 mm/kasan/quarantine.c:272 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:438 kasan_slab_alloc include/linux/kasan.h:259 [inline] slab_post_alloc_hook include/../mm/slab.h:583 [inline] slab_alloc_node mm/slub.c:2956 [inline] slab_alloc mm/slub.c:2964 [inline] kmem_cache_alloc+0x16c/0x300 mm/slub.c:2969 getname_flags+0xba/0x510 fs/namei.c:141 getname+0x19/0x20 fs/namei.c:212 do_sys_openat2+0xd2/0x470 fs/open.c:1205 do_sys_open fs/open.c:1227 [inline] __do_sys_openat fs/open.c:1243 [inline] __se_sys_openat fs/open.c:1238 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1238 Memory state around the buggy address: ffff88810f109300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88810f109380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88810f109400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88810f109480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88810f109500: fb fb fb fb 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