================================================================== 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 ffff88811529d470 by task syz-executor.3/30167 CPU: 1 PID: 30167 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_mem_cgroup_pages+0x36c/0x850 mm/vmscan.c:6550 try_charge_memcg+0x48f/0x1550 mm/memcontrol.c:2686 try_charge mm/memcontrol.c:2811 [inline] charge_memcg+0x6b/0x1a0 mm/memcontrol.c:6814 __mem_cgroup_charge+0x37/0x130 mm/memcontrol.c:6850 mem_cgroup_charge include/linux/memcontrol.h:715 [inline] __add_to_page_cache_locked+0x2d1/0xa20 mm/filemap.c:892 add_to_page_cache_lru+0x11b/0x2c0 mm/filemap.c:984 pagecache_get_page+0xbe1/0xeb0 mm/filemap.c:1951 grab_cache_page_write_begin+0x5d/0xa0 mm/filemap.c:3797 ext4_da_write_begin+0x5ae/0xc30 fs/ext4/inode.c:3003 generic_perform_write+0x2bc/0x5a0 mm/filemap.c:3843 ext4_buffered_write_iter+0x48a/0x610 fs/ext4/file.c:270 ext4_file_write_iter+0x443/0x1c80 __kernel_write+0x5ab/0xa60 fs/read_write.c:539 __dump_emit+0x261/0x3a0 fs/coredump.c:875 dump_emit+0x381/0x3f0 fs/coredump.c:912 dump_user_range+0x86/0x1c0 fs/coredump.c:949 elf_core_dump+0x3663/0x3e80 fs/binfmt_elf.c:2285 do_coredump+0x1834/0x3050 fs/coredump.c:826 get_signal+0x4c8/0x1630 kernel/signal.c:2882 arch_do_signal_or_restart+0xbd/0x1680 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop+0xa0/0xe0 kernel/entry/common.c:172 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:208 irqentry_exit_to_user_mode+0x9/0x20 kernel/entry/common.c:314 irqentry_exit+0x12/0x40 kernel/entry/common.c:405 exc_general_protection+0x327/0x4b0 arch/x86/kernel/traps.c:562 asm_exc_general_protection+0x27/0x30 arch/x86/include/asm/idtentry.h:562 RIP: 0033:0x7f624c367db1 Code: 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 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:00000000200003a0 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f624c495f80 RCX: 00007f624c367da9 RDX: 0000000000000000 RSI: 00000000200003a0 RDI: 0000000000000000 RBP: 00007f624c3b447a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f624c495f80 R15: 00007ffc6723a4a8 The buggy address belongs to the page: page:ffffea000454a740 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11529d flags: 0x4000000000000000(zone=1) raw: 4000000000000000 ffffea0005948e88 ffffea0006b32288 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Unmovable, gfp_mask 0x500dc0(GFP_USER|__GFP_ZERO|__GFP_ACCOUNT), pid 30017, ts 1515482322180, free_ts 1515690709565 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 __alloc_pages_node include/linux/gfp.h:591 [inline] alloc_pages_node include/linux/gfp.h:605 [inline] alloc_pages include/linux/gfp.h:618 [inline] __pte_alloc_one include/asm-generic/pgalloc.h:63 [inline] pte_alloc_one+0x73/0x1b0 arch/x86/mm/pgtable.c:33 __pte_alloc+0x86/0x350 mm/memory.c:498 copy_pte_range mm/memory.c:1080 [inline] copy_pmd_range mm/memory.c:1215 [inline] copy_pud_range mm/memory.c:1252 [inline] copy_p4d_range mm/memory.c:1276 [inline] copy_page_range+0x28a8/0x2f90 mm/memory.c:1349 dup_mmap kernel/fork.c:659 [inline] dup_mm kernel/fork.c:1521 [inline] copy_mm+0xc7e/0x13e0 kernel/fork.c:1573 copy_process+0x1149/0x3290 kernel/fork.c:2264 kernel_clone+0x21e/0x9e0 kernel/fork.c:2662 __do_sys_clone3 kernel/fork.c:2946 [inline] __se_sys_clone3 kernel/fork.c:2930 [inline] __x64_sys_clone3+0x376/0x3a0 kernel/fork.c:2930 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: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_list+0x14b/0xa60 mm/page_alloc.c:3670 release_pages+0x1310/0x1370 mm/swap.c:1009 free_pages_and_swap_cache+0x8a/0xa0 mm/swap_state.c:320 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:240 [inline] tlb_flush_mmu mm/mmu_gather.c:247 [inline] tlb_finish_mmu+0x177/0x320 mm/mmu_gather.c:338 exit_mmap+0x3ef/0x6f0 mm/mmap.c:3211 __mmput+0x95/0x310 kernel/fork.c:1179 mmput+0x5b/0x170 kernel/fork.c:1202 exit_mm kernel/exit.c:552 [inline] do_exit+0xb9c/0x2ca0 kernel/exit.c:865 __do_sys_exit kernel/exit.c:969 [inline] __se_sys_exit kernel/exit.c:967 [inline] __ia32_sys_exit+0x0/0x40 kernel/exit.c:967 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 Memory state around the buggy address: ffff88811529d300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88811529d380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88811529d400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88811529d480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88811529d500: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 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