NILFS (loop4): unable to write superblock: err=-5 ================================================================== BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:72 [inline] BUG: KASAN: use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] BUG: KASAN: use-after-free in mapping_unevictable include/linux/pagemap.h:252 [inline] BUG: KASAN: use-after-free in folio_evictable mm/internal.h:138 [inline] BUG: KASAN: use-after-free in lru_add_fn+0x2d4/0x1ac0 mm/swap.c:210 Read of size 8 at addr ffff888065a31210 by task syz-executor.4/4146 CPU: 0 PID: 4146 Comm: syz-executor.4 Not tainted 6.1.94-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:395 kasan_report+0x136/0x160 mm/kasan/report.c:495 kasan_check_range+0x27f/0x290 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:72 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] mapping_unevictable include/linux/pagemap.h:252 [inline] folio_evictable mm/internal.h:138 [inline] lru_add_fn+0x2d4/0x1ac0 mm/swap.c:210 folio_batch_move_lru+0x31a/0x720 mm/swap.c:246 lru_add_drain_cpu+0x108/0x8b0 mm/swap.c:669 lru_add_drain+0x11e/0x3e0 mm/swap.c:773 __pagevec_release+0x51/0xf0 mm/swap.c:1072 pagevec_release include/linux/pagevec.h:71 [inline] write_cache_pages+0x12bb/0x15c0 mm/page-writeback.c:2399 generic_writepages mm/page-writeback.c:2451 [inline] do_writepages+0x40f/0x670 mm/page-writeback.c:2471 __writeback_single_inode+0x15d/0x11e0 fs/fs-writeback.c:1612 writeback_single_inode+0x22c/0x960 fs/fs-writeback.c:1733 write_inode_now+0x1cf/0x260 fs/fs-writeback.c:2769 iput_final fs/inode.c:1778 [inline] iput+0x616/0x980 fs/inode.c:1817 nilfs_put_super+0xd3/0x150 fs/nilfs2/super.c:507 generic_shutdown_super+0x130/0x340 fs/super.c:501 kill_block_super+0x7a/0xe0 fs/super.c:1459 deactivate_locked_super+0xa0/0x110 fs/super.c:332 cleanup_mnt+0x490/0x520 fs/namespace.c:1186 task_work_run+0x246/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7ff07e87e257 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:00007ffd34d6a138 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000064 RCX: 00007ff07e87e257 RDX: 0000000000000200 RSI: 0000000000000009 RDI: 00007ffd34d6b2e0 RBP: 00007ff07e8d96c6 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000202 R12: 00007ffd34d6b2e0 R13: 00007ff07e8d96c6 R14: 00005555556b2430 R15: 0000000000000007 Allocated by task 4957: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc_lru+0x10c/0x2d0 mm/slub.c:3429 alloc_inode_sb include/linux/fs.h:3193 [inline] nilfs_alloc_inode+0x2a/0xe0 fs/nilfs2/super.c:154 alloc_inode fs/inode.c:261 [inline] iget5_locked+0x9c/0x270 fs/inode.c:1285 nilfs_iget_locked+0x127/0x180 fs/nilfs2/inode.c:605 nilfs_ifile_read+0x2e/0x170 fs/nilfs2/ifile.c:187 nilfs_attach_checkpoint+0x260/0x4d0 fs/nilfs2/super.c:572 nilfs_fill_super+0x349/0x660 fs/nilfs2/super.c:1095 nilfs_mount+0x679/0x9a0 fs/nilfs2/super.c:1347 legacy_get_tree+0xeb/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1562 do_new_mount+0x2ba/0xb40 fs/namespace.c:3051 do_mount fs/namespace.c:3394 [inline] __do_sys_mount fs/namespace.c:3602 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3579 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Freed by task 15: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook mm/slub.c:1750 [inline] slab_free mm/slub.c:3661 [inline] kmem_cache_free+0x292/0x510 mm/slub.c:3683 rcu_do_batch kernel/rcu/tree.c:2296 [inline] rcu_core+0xad5/0x1810 kernel/rcu/tree.c:2556 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571 run_ksoftirqd+0xc6/0x120 kernel/softirq.c:938 smpboot_thread_fn+0x52c/0xa30 kernel/smpboot.c:164 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:486 call_rcu+0x163/0xa10 kernel/rcu/tree.c:2844 nilfs_put_root+0x93/0xb0 fs/nilfs2/the_nilfs.c:910 nilfs_segctor_destroy fs/nilfs2/segment.c:2825 [inline] nilfs_detach_log_writer+0x8c5/0xbd0 fs/nilfs2/segment.c:2887 nilfs_put_super+0x49/0x150 fs/nilfs2/super.c:498 generic_shutdown_super+0x130/0x340 fs/super.c:501 kill_block_super+0x7a/0xe0 fs/super.c:1459 deactivate_locked_super+0xa0/0x110 fs/super.c:332 cleanup_mnt+0x490/0x520 fs/namespace.c:1186 task_work_run+0x246/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff888065a30cd0 which belongs to the cache nilfs2_inode_cache of size 1512 The buggy address is located 1344 bytes inside of 1512-byte region [ffff888065a30cd0, ffff888065a312b8) The buggy address belongs to the physical page: page:ffffea0001968c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x65a30 head:ffffea0001968c00 order:3 compound_mapcount:0 compound_pincount:0 memcg:ffff888059814501 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff8880173fddc0 raw: 0000000000000000 0000000080130013 00000001ffffffff ffff888059814501 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 4891, tgid 4890 (syz-executor.3), ts 234841589358, free_ts 234018235102 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2513 prep_new_page mm/page_alloc.c:2520 [inline] get_page_from_freelist+0x31a1/0x3320 mm/page_alloc.c:4279 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5547 alloc_slab_page+0x6a/0x150 mm/slub.c:1794 allocate_slab mm/slub.c:1939 [inline] new_slab+0x84/0x2d0 mm/slub.c:1992 ___slab_alloc+0xc20/0x1270 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc_lru+0x1a5/0x2d0 mm/slub.c:3429 alloc_inode_sb include/linux/fs.h:3193 [inline] nilfs_alloc_inode+0x2a/0xe0 fs/nilfs2/super.c:154 alloc_inode fs/inode.c:261 [inline] iget5_locked+0x9c/0x270 fs/inode.c:1285 nilfs_iget_locked+0x127/0x180 fs/nilfs2/inode.c:605 nilfs_ifile_read+0x2e/0x170 fs/nilfs2/ifile.c:187 nilfs_attach_checkpoint+0x260/0x4d0 fs/nilfs2/super.c:572 nilfs_fill_super+0x349/0x660 fs/nilfs2/super.c:1095 nilfs_mount+0x679/0x9a0 fs/nilfs2/super.c:1347 legacy_get_tree+0xeb/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1562 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1440 [inline] free_pcp_prepare mm/page_alloc.c:1490 [inline] free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3358 free_unref_page+0x33/0x3e0 mm/page_alloc.c:3453 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc+0x10c/0x2d0 mm/slub.c:3422 kmem_cache_zalloc include/linux/slab.h:682 [inline] jbd2_alloc_handle include/linux/jbd2.h:1594 [inline] new_handle fs/jbd2/transaction.c:476 [inline] jbd2__journal_start+0x144/0x5c0 fs/jbd2/transaction.c:503 __ext4_journal_start_sb+0x19b/0x410 fs/ext4/ext4_jbd2.c:105 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_evict_inode+0x8dc/0x1150 fs/ext4/inode.c:251 evict+0x2a4/0x620 fs/inode.c:666 do_unlinkat+0x509/0x820 fs/namei.c:4399 __do_sys_unlink fs/namei.c:4440 [inline] __se_sys_unlink fs/namei.c:4438 [inline] __x64_sys_unlink+0x45/0x50 fs/namei.c:4438 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Memory state around the buggy address: ffff888065a31100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888065a31180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888065a31200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888065a31280: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc ffff888065a31300: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb ==================================================================