================================================================== 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:257 [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 ffff88805db784a8 by task udevd/4549 CPU: 0 PID: 4549 Comm: udevd Not tainted 6.9.0-rc6-next-20240503-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 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:257 [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 wp_can_reuse_anon_folio mm/memory.c:3550 [inline] do_wp_page+0x2c65/0x5310 mm/memory.c:3662 handle_pte_fault+0x1189/0x70f0 mm/memory.c:5396 __handle_mm_fault mm/memory.c:5523 [inline] handle_mm_fault+0x10df/0x1ba0 mm/memory.c:5688 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7efceaec71a6 Code: f2 e6 0e 00 eb 81 49 89 c5 49 ff c0 49 c1 ed 0c 4c 33 28 4c 89 e8 eb c0 44 0f b7 04 4e 4c 89 c0 4d 39 d8 73 2a 48 89 fa ff c0 <4c> 89 4d 18 48 c1 ea 0c 48 33 94 ce 80 00 00 00 48 89 55 10 48 89 RSP: 002b:00007ffd90d75970 EFLAGS: 00010203 RAX: 0000000000000007 RBX: 0000000000000030 RCX: 0000000000000001 RDX: 000055b7c4fe88a0 RSI: 000055b7c4fde010 RDI: 000055b7c4fe88a0 RBP: 000055b7c4fe8890 R08: 0000000000000006 R09: ad46e3ef4e80ff42 R10: 537eb15d2a495532 R11: 0000000000000007 R12: 0000000000000000 R13: 0000000200000001 R14: 00007efceaff1aa0 R15: 0000000000000000 Allocated by task 5212: 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 5190: 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:2566 [inline] rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2840 handle_softirqs+0x2d6/0x990 kernel/softirq.c:554 do_softirq+0x11b/0x1e0 kernel/softirq.c:455 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382 wg_packet_create_data_done drivers/net/wireguard/send.c:247 [inline] wg_packet_tx_worker+0x160/0x810 drivers/net/wireguard/send.c:276 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/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+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:3103 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:3207 nilfs_put_root+0x97/0xc0 fs/nilfs2/the_nilfs.c:909 nilfs_segctor_destroy fs/nilfs2/segment.c:2753 [inline] nilfs_detach_log_writer+0x8bb/0xbe0 fs/nilfs2/segment.c:2816 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 ffff88805db78000 which belongs to the cache nilfs2_inode_cache of size 1512 The buggy address is located 1192 bytes inside of freed 1512-byte region [ffff88805db78000, ffff88805db785e8) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805db799a0 pfn:0x5db78 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88802d801301 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff88801af90a00 dead000000000122 0000000000000000 raw: ffff88805db799a0 0000000080130012 00000001ffffefff ffff88802d801301 head: 00fff00000000040 ffff88801af90a00 dead000000000122 0000000000000000 head: ffff88805db799a0 0000000080130012 00000001ffffefff ffff88802d801301 head: 00fff00000000003 ffffea000176de01 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 5212, tgid 5211 (syz-executor.1), ts 66206463198, free_ts 14649527828 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:244 [inline] alloc_pages_node_noprof include/linux/gfp.h:271 [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_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 page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_page+0xd22/0xea0 mm/page_alloc.c:2601 free_contig_range+0x9e/0x160 mm/page_alloc.c:6655 destroy_args+0x8a/0x890 mm/debug_vm_pgtable.c:1037 debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1417 do_one_initcall+0x248/0x880 init/main.c:1265 do_initcall_level+0x157/0x210 init/main.c:1327 do_initcalls+0x3f/0x80 init/main.c:1343 kernel_init_freeable+0x435/0x5d0 init/main.c:1576 kernel_init+0x1d/0x2b0 init/main.c:1465 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff88805db78380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805db78400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88805db78480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805db78500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805db78580: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc ==================================================================