NILFS (loop5): disposed unprocessed dirty file(s) when detaching log writer ================================================================== BUG: KASAN: slab-use-after-free in nilfs_load_inode_block+0x11e/0x280 fs/nilfs2/inode.c:1030 Read of size 8 at addr ffff888028034430 by task syz-executor.5/5065 CPU: 0 PID: 5065 Comm: syz-executor.5 Not tainted 6.5.0-rc3-syzkaller-00025-g5f0bc0b042fc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 nilfs_load_inode_block+0x11e/0x280 fs/nilfs2/inode.c:1030 __nilfs_mark_inode_dirty+0xa5/0x280 fs/nilfs2/inode.c:1107 nilfs_dirty_inode+0x164/0x200 fs/nilfs2/inode.c:1148 __mark_inode_dirty+0x305/0xd90 fs/fs-writeback.c:2430 mark_inode_dirty_sync include/linux/fs.h:2153 [inline] iput+0x1f2/0x8f0 fs/inode.c:1814 nilfs_dispose_list+0x51d/0x5c0 fs/nilfs2/segment.c:816 nilfs_detach_log_writer+0xaf1/0xbb0 fs/nilfs2/segment.c:2859 nilfs_put_super+0x4d/0x160 fs/nilfs2/super.c:498 generic_shutdown_super+0x134/0x340 fs/super.c:499 kill_block_super+0x68/0xa0 fs/super.c:1417 deactivate_locked_super+0xa4/0x110 fs/super.c:330 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1254 task_work_run+0x24a/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd0f387de57 Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007fffa1c574e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd0f387de57 RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007fffa1c575a0 RBP: 00007fffa1c575a0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fffa1c58660 R13: 00007fd0f38c73b9 R14: 000000000005dba3 R15: 0000000000000008 Allocated by task 10222: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:582 [inline] kzalloc include/linux/slab.h:703 [inline] nilfs_find_or_create_root+0x137/0x4e0 fs/nilfs2/the_nilfs.c:851 nilfs_attach_checkpoint+0x123/0x4d0 fs/nilfs2/super.c:550 nilfs_fill_super+0x321/0x600 fs/nilfs2/super.c:1095 nilfs_mount+0x637/0x950 fs/nilfs2/super.c:1343 legacy_get_tree+0xef/0x190 fs/fs_context.c:611 vfs_get_tree+0x8c/0x270 fs/super.c:1519 do_new_mount+0x28f/0xae0 fs/namespace.c:3335 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 5065: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1792 [inline] slab_free_freelist_hook mm/slub.c:1818 [inline] slab_free mm/slub.c:3801 [inline] __kmem_cache_free+0x25f/0x3b0 mm/slub.c:3814 nilfs_segctor_destroy fs/nilfs2/segment.c:2782 [inline] nilfs_detach_log_writer+0x8c1/0xbb0 fs/nilfs2/segment.c:2845 nilfs_put_super+0x4d/0x160 fs/nilfs2/super.c:498 generic_shutdown_super+0x134/0x340 fs/super.c:499 kill_block_super+0x68/0xa0 fs/super.c:1417 deactivate_locked_super+0xa4/0x110 fs/super.c:330 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1254 task_work_run+0x24a/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888028034400 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 48 bytes inside of freed 256-byte region [ffff888028034400, ffff888028034500) The buggy address belongs to the physical page: page:ffffea0000a00d00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x28034 head:ffffea0000a00d00 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff888012841b40 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0x1d2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 10222, tgid 10219 (syz-executor.5), ts 384222979334, free_ts 380161575919 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1570 prep_new_page mm/page_alloc.c:1577 [inline] get_page_from_freelist+0x31e8/0x3370 mm/page_alloc.c:3221 __alloc_pages+0x255/0x670 mm/page_alloc.c:4477 alloc_slab_page+0x6a/0x160 mm/slub.c:1862 allocate_slab mm/slub.c:2009 [inline] new_slab+0x84/0x2f0 mm/slub.c:2062 ___slab_alloc+0xade/0x1100 mm/slub.c:3215 __slab_alloc mm/slub.c:3314 [inline] __slab_alloc_node mm/slub.c:3367 [inline] slab_alloc_node mm/slub.c:3460 [inline] __kmem_cache_alloc_node+0x1af/0x270 mm/slub.c:3509 __do_kmalloc_node mm/slab_common.c:984 [inline] __kmalloc+0xa8/0x230 mm/slab_common.c:998 kmalloc include/linux/slab.h:586 [inline] kzalloc include/linux/slab.h:703 [inline] nilfs_mdt_init+0x36/0x1b0 fs/nilfs2/mdt.c:451 nilfs_cpfile_read+0x123/0x1a0 fs/nilfs2/cpfile.c:997 nilfs_load_super_root fs/nilfs2/the_nilfs.c:125 [inline] load_nilfs+0x5bd/0x1050 fs/nilfs2/the_nilfs.c:301 nilfs_fill_super+0x2b5/0x600 fs/nilfs2/super.c:1090 nilfs_mount+0x637/0x950 fs/nilfs2/super.c:1343 legacy_get_tree+0xef/0x190 fs/fs_context.c:611 vfs_get_tree+0x8c/0x270 fs/super.c:1519 do_new_mount+0x28f/0xae0 fs/namespace.c:3335 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1161 [inline] free_unref_page_prepare+0x903/0xa30 mm/page_alloc.c:2348 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2443 __slab_free+0x2f6/0x390 mm/slub.c:3707 qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x6c/0x3b0 mm/slab.h:762 slab_alloc_node mm/slub.c:3470 [inline] slab_alloc mm/slub.c:3478 [inline] __kmem_cache_alloc_lru mm/slub.c:3485 [inline] kmem_cache_alloc+0x123/0x300 mm/slub.c:3494 ptlock_alloc mm/memory.c:6062 [inline] ptlock_init include/linux/mm.h:2797 [inline] pmd_ptlock_init include/linux/mm.h:2888 [inline] pgtable_pmd_page_ctor include/linux/mm.h:2924 [inline] pmd_alloc_one include/asm-generic/pgalloc.h:129 [inline] __pmd_alloc+0x136/0x850 mm/memory.c:5489 pmd_alloc include/linux/mm.h:2747 [inline] __handle_mm_fault mm/memory.c:5040 [inline] handle_mm_fault+0xe0d/0x5410 mm/memory.c:5233 do_user_addr_fault arch/x86/mm/fault.c:1392 [inline] handle_page_fault arch/x86/mm/fault.c:1486 [inline] exc_page_fault+0x266/0x7c0 arch/x86/mm/fault.c:1542 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 Memory state around the buggy address: ffff888028034300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888028034380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888028034400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888028034480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888028034500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================