================================================================== 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:259 [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+0x192/0xd70 mm/swap.c:184 Read of size 8 at addr ffff88804b30e4c0 by task syz-executor.1/9258 CPU: 2 PID: 9258 Comm: syz-executor.1 Not tainted 6.10.0-rc3-syzkaller-00022-gcea2a26553ac #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0xef/0x1a0 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:259 [inline] folio_evictable mm/internal.h:353 [inline] lru_add_fn+0x192/0xd70 mm/swap.c:184 folio_batch_move_lru+0x243/0x400 mm/swap.c:220 folio_batch_add_and_move+0xe5/0x160 mm/swap.c:236 folio_add_lru+0x37d/0x7f0 mm/swap.c:522 folio_add_lru_vma+0xb0/0x100 mm/swap.c:542 wp_page_copy mm/memory.c:3359 [inline] do_wp_page+0x1497/0x3340 mm/memory.c:3683 handle_pte_fault mm/memory.c:5396 [inline] __handle_mm_fault+0x2311/0x53f0 mm/memory.c:5523 handle_mm_fault+0x476/0xa00 mm/memory.c:5688 do_user_addr_fault+0x426/0xe50 arch/x86/mm/fault.c:1338 handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7f94178366dd Code: e0 04 8b 4c 02 08 85 c9 0f 85 7b 0a 00 00 31 c0 b9 40 42 0f 00 ba 81 00 00 00 c7 06 01 00 00 00 bf ca 00 00 00 e8 f3 67 04 00 <83> 05 a4 72 17 00 01 80 bc 24 d8 00 00 00 00 0f b6 05 bf ef c9 00 RSP: 002b:00007ffdcf905470 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f941787cee9 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f94179abf88 RBP: 00007f94179abf80 R08: 00007ffdcf905387 R09: 0000000000000079 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdcf905580 R13: 00007f94179abf8c R14: 00007f94179abf80 R15: 0000000000000000 Allocated by task 9231: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3941 [inline] slab_alloc_node mm/slub.c:4001 [inline] kmem_cache_alloc_lru_noprof+0x121/0x2f0 mm/slub.c:4020 nilfs_alloc_inode+0x26/0x150 fs/nilfs2/super.c:154 alloc_inode+0x5d/0x230 fs/inode.c:261 iget5_locked fs/inode.c:1235 [inline] iget5_locked+0x1c9/0x2c0 fs/inode.c:1228 nilfs_iget_locked+0xa1/0xe0 fs/nilfs2/inode.c:606 nilfs_ifile_read+0x2f/0x1e0 fs/nilfs2/ifile.c:192 nilfs_attach_checkpoint+0x12d/0x1d0 fs/nilfs2/super.c:557 nilfs_fill_super fs/nilfs2/super.c:1067 [inline] nilfs_get_tree+0x951/0x1000 fs/nilfs2/super.c:1211 vfs_get_tree+0x8f/0x380 fs/super.c:1780 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14e6/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __x64_sys_mount+0x297/0x320 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 24: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2196 [inline] slab_free mm/slub.c:4437 [inline] kmem_cache_free+0x12f/0x3a0 mm/slub.c:4512 i_callback+0x43/0x70 fs/inode.c:250 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0x828/0x16b0 kernel/rcu/tree.c:2809 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554 run_ksoftirqd kernel/softirq.c:928 [inline] run_ksoftirqd+0x3a/0x60 kernel/softirq.c:920 smpboot_thread_fn+0x661/0xa10 kernel/smpboot.c:164 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Last potentially related work creation: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541 __call_rcu_common.constprop.0+0x9a/0x790 kernel/rcu/tree.c:3072 destroy_inode+0x12c/0x1b0 fs/inode.c:316 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 nilfs_put_root+0xae/0xe0 fs/nilfs2/the_nilfs.c:925 nilfs_segctor_destroy fs/nilfs2/segment.c:2788 [inline] nilfs_detach_log_writer+0x5ef/0xaa0 fs/nilfs2/segment.c:2850 nilfs_put_super+0x43/0x1b0 fs/nilfs2/super.c:498 generic_shutdown_super+0x159/0x3d0 fs/super.c:642 kill_block_super+0x3b/0x90 fs/super.c:1676 deactivate_locked_super+0xbe/0x1a0 fs/super.c:473 deactivate_super+0xde/0x100 fs/super.c:506 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 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+0x278/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88804b30e018 which belongs to the cache nilfs2_inode_cache of size 1512 The buggy address is located 1192 bytes inside of freed 1512-byte region [ffff88804b30e018, ffff88804b30e600) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88804b309338 pfn:0x4b308 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888026109e01 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff888016adab40 dead000000000122 0000000000000000 raw: ffff88804b309338 000000008013000a 00000001ffffefff ffff888026109e01 head: 00fff00000000040 ffff888016adab40 dead000000000122 0000000000000000 head: ffff88804b309338 000000008013000a 00000001ffffefff ffff888026109e01 head: 00fff00000000003 ffffea00012cc201 ffffffffffffffff 0000000000000000 head: ffff888000000008 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 8444, tgid 8443 (syz-executor.1), ts 195238964242, free_ts 164044707295 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x136a/0x2e50 mm/page_alloc.c:3420 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4678 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x56/0x110 mm/slub.c:2265 allocate_slab mm/slub.c:2428 [inline] new_slab+0x84/0x260 mm/slub.c:2481 ___slab_alloc+0xdac/0x1870 mm/slub.c:3667 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3757 __slab_alloc_node mm/slub.c:3810 [inline] slab_alloc_node mm/slub.c:3989 [inline] kmem_cache_alloc_lru_noprof+0x2a0/0x2f0 mm/slub.c:4020 nilfs_alloc_inode+0x26/0x150 fs/nilfs2/super.c:154 alloc_inode+0x5d/0x230 fs/inode.c:261 iget5_locked fs/inode.c:1235 [inline] iget5_locked+0x1c9/0x2c0 fs/inode.c:1228 nilfs_iget_locked+0xa1/0xe0 fs/nilfs2/inode.c:606 nilfs_sufile_read+0xda/0x5b0 fs/nilfs2/sufile.c:1227 nilfs_load_super_root fs/nilfs2/the_nilfs.c:130 [inline] load_nilfs+0x6a1/0x12d0 fs/nilfs2/the_nilfs.c:301 nilfs_fill_super fs/nilfs2/super.c:1062 [inline] nilfs_get_tree+0x8c9/0x1000 fs/nilfs2/super.c:1211 vfs_get_tree+0x8f/0x380 fs/super.c:1780 page last free pid 7937 tgid 7936 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_page+0x64a/0xe40 mm/page_alloc.c:2583 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3941 [inline] slab_alloc_node mm/slub.c:4001 [inline] __do_kmalloc_node mm/slub.c:4121 [inline] __kmalloc_noprof+0x19d/0x410 mm/slub.c:4135 kmalloc_noprof include/linux/slab.h:664 [inline] replicas_table_update+0x1b4/0x9e0 fs/bcachefs/replicas.c:326 bch2_fs_replicas_init+0x19b/0x1e0 fs/bcachefs/replicas.c:1061 bch2_fs_alloc+0x192f/0x2610 fs/bcachefs/super.c:910 bch2_fs_open+0x7b5/0x1110 fs/bcachefs/super.c:2102 bch2_mount+0xdea/0x11d0 fs/bcachefs/fs.c:1917 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8f/0x380 fs/super.c:1780 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14e6/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __x64_sys_mount+0x297/0x320 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88804b30e380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804b30e400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88804b30e480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88804b30e500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804b30e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================