================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline] BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] BUG: KASAN: slab-use-after-free in mapping_unevictable include/linux/pagemap.h:260 [inline] BUG: KASAN: slab-use-after-free in folio_evictable mm/internal.h:353 [inline] BUG: KASAN: slab-use-after-free in lru_add_fn+0x2cc/0x1a20 mm/swap.c:184 Read of size 8 at addr ffff88806be0ab18 by task syz-executor.0/5816 CPU: 1 PID: 5816 Comm: syz-executor.0 Not tainted 6.9.0-next-20240520-syzkaller-13491-g632483ea8004 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] mapping_unevictable include/linux/pagemap.h:260 [inline] folio_evictable mm/internal.h:353 [inline] lru_add_fn+0x2cc/0x1a20 mm/swap.c:184 folio_batch_move_lru+0x322/0x690 mm/swap.c:220 lru_add_drain_cpu+0x10e/0x8c0 mm/swap.c:657 lru_add_drain+0x123/0x3e0 mm/swap.c:757 shift_arg_pages fs/exec.c:731 [inline] setup_arg_pages+0xc39/0x1000 fs/exec.c:849 load_elf_binary+0xbb6/0x2620 fs/binfmt_elf.c:1013 search_binary_handler fs/exec.c:1797 [inline] exec_binprm fs/exec.c:1839 [inline] bprm_execve+0xaf8/0x17c0 fs/exec.c:1891 do_execveat_common+0x553/0x700 fs/exec.c:1998 do_execve fs/exec.c:2072 [inline] __do_sys_execve fs/exec.c:2148 [inline] __se_sys_execve fs/exec.c:2143 [inline] __x64_sys_execve+0x92/0xb0 fs/exec.c:2143 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x40720e Code: Unable to access opcode bytes at 0x4071e4. RSP: 002b:000000c001529200 EFLAGS: 00000212 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 000000c000039830 RCX: 000000000040720e RDX: 000000c0000bad20 RSI: 000000c0000b6660 RDI: 000000c000039830 RBP: 000000c001529240 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b9d65 R13: 000000c00149b000 R14: 000000c0004ba4e0 R15: 0000000000000014 Allocated by task 5515: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3940 [inline] slab_alloc_node mm/slub.c:4000 [inline] kmem_cache_alloc_lru_noprof+0x139/0x2b0 mm/slub.c:4019 nilfs_alloc_inode+0x2e/0xf0 fs/nilfs2/super.c:154 alloc_inode fs/inode.c:261 [inline] iget5_locked+0xa4/0x280 fs/inode.c:1235 nilfs_iget_locked+0x12b/0x180 fs/nilfs2/inode.c:606 nilfs_ifile_read+0x30/0x1b0 fs/nilfs2/ifile.c:192 nilfs_attach_checkpoint+0xed/0x1a0 fs/nilfs2/super.c:557 nilfs_fill_super+0x380/0x6a0 fs/nilfs2/super.c:1067 nilfs_get_tree+0x4f9/0x920 fs/nilfs2/super.c:1211 vfs_get_tree+0x90/0x2a0 fs/super.c:1780 do_new_mount+0x2be/0xb40 fs/namespace.c:3352 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 0: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2195 [inline] slab_free mm/slub.c:4436 [inline] kmem_cache_free+0x145/0x350 mm/slub.c:4511 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2809 handle_softirqs+0x2d6/0x990 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541 __call_rcu_common kernel/rcu/tree.c:3072 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:3176 nilfs_put_root+0x97/0xc0 fs/nilfs2/the_nilfs.c:925 nilfs_segctor_destroy fs/nilfs2/segment.c:2747 [inline] nilfs_detach_log_writer+0x8bb/0xbe0 fs/nilfs2/segment.c:2810 nilfs_put_super+0x4d/0x160 fs/nilfs2/super.c:498 generic_shutdown_super+0x136/0x2d0 fs/super.c:642 kill_block_super+0x44/0x90 fs/super.c:1676 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1267 task_work_run+0x24f/0x310 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88806be0a670 which belongs to the cache nilfs2_inode_cache of size 1512 The buggy address is located 1192 bytes inside of freed 1512-byte region [ffff88806be0a670, ffff88806be0ac58) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6be08 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88802960f001 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff88801af1f8c0 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080130013 00000001ffffefff ffff88802960f001 head: 00fff00000000040 ffff88801af1f8c0 dead000000000122 0000000000000000 head: 0000000000000000 0000000080130013 00000001ffffefff ffff88802960f001 head: 00fff00000000003 ffffea0001af8201 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5515, tgid 5514 (syz-executor.0), ts 87760095631, free_ts 62718493018 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x2ce2/0x2d90 mm/page_alloc.c:3438 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4696 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2264 allocate_slab+0x5a/0x2e0 mm/slub.c:2427 new_slab mm/slub.c:2480 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3666 __slab_alloc+0x58/0xa0 mm/slub.c:3756 __slab_alloc_node mm/slub.c:3809 [inline] slab_alloc_node mm/slub.c:3988 [inline] kmem_cache_alloc_lru_noprof+0x1c5/0x2b0 mm/slub.c:4019 nilfs_alloc_inode+0x2e/0xf0 fs/nilfs2/super.c:154 alloc_inode fs/inode.c:261 [inline] iget5_locked+0xa4/0x280 fs/inode.c:1235 nilfs_iget_locked+0x12b/0x180 fs/nilfs2/inode.c:606 nilfs_dat_read+0xc3/0x310 fs/nilfs2/dat.c:508 nilfs_load_super_root fs/nilfs2/the_nilfs.c:120 [inline] load_nilfs+0x56f/0x1090 fs/nilfs2/the_nilfs.c:301 nilfs_fill_super+0x310/0x6a0 fs/nilfs2/super.c:1062 nilfs_get_tree+0x4f9/0x920 fs/nilfs2/super.c:1211 vfs_get_tree+0x90/0x2a0 fs/super.c:1780 page last free pid 5086 tgid 5081 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_folios+0xf23/0x19e0 mm/page_alloc.c:2650 folios_put_refs+0x93a/0xa60 mm/swap.c:1024 free_pages_and_swap_cache+0x2ea/0x690 mm/swap_state.c:329 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline] tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373 zap_pte_range mm/memory.c:1691 [inline] zap_pmd_range mm/memory.c:1730 [inline] zap_pud_range mm/memory.c:1759 [inline] zap_p4d_range mm/memory.c:1780 [inline] unmap_page_range+0x42b1/0x4d00 mm/memory.c:1801 unmap_vmas+0x3cc/0x5f0 mm/memory.c:1891 exit_mmap+0x264/0xc80 mm/mmap.c:3341 __mmput+0x115/0x3c0 kernel/fork.c:1346 exit_mm+0x220/0x310 kernel/exit.c:565 do_exit+0x9aa/0x27e0 kernel/exit.c:861 do_group_exit+0x207/0x2c0 kernel/exit.c:1023 get_signal+0x16a1/0x1740 kernel/signal.c:2909 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88806be0aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88806be0aa80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88806be0ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88806be0ab80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88806be0ac00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc ==================================================================