loop0: detected capacity change from 0 to 2048 ================================================================== BUG: KASAN: use-after-free in nilfs_test_metadata_dirty+0x39/0x210 fs/nilfs2/segment.c:813 Read of size 8 at addr ffff8881481f7830 by task syz-executor899/3606 CPU: 0 PID: 3606 Comm: syz-executor899 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x65/0x4b0 mm/kasan/report.c:317 print_report+0x108/0x1f0 mm/kasan/report.c:433 kasan_report+0xc3/0xf0 mm/kasan/report.c:495 nilfs_test_metadata_dirty+0x39/0x210 fs/nilfs2/segment.c:813 nilfs_segctor_confirm+0x78/0x2d0 fs/nilfs2/segment.c:837 nilfs_segctor_destroy fs/nilfs2/segment.c:2729 [inline] nilfs_detach_log_writer+0x4c1/0xbd0 fs/nilfs2/segment.c:2810 nilfs_put_super+0x4b/0x150 fs/nilfs2/super.c:468 generic_shutdown_super+0x130/0x310 fs/super.c:491 kill_block_super+0x79/0xd0 fs/super.c:1427 deactivate_locked_super+0xa7/0xf0 fs/super.c:331 cleanup_mnt+0x4ce/0x560 fs/namespace.c:1186 task_work_run+0x146/0x1c0 kernel/task_work.c:177 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x6b2/0x2280 kernel/exit.c:813 do_group_exit+0x1fd/0x2b0 kernel/exit.c:943 __do_sys_exit_group kernel/exit.c:954 [inline] __se_sys_exit_group kernel/exit.c:952 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:952 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb697378bc9 Code: Unable to access opcode bytes at 0x7fb697378b9f. RSP: 002b:00007ffc8e794e08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007fb6973f0330 RCX: 00007fb697378bc9 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007fb6973eae40 R10: 00007ffc8e794d20 R11: 0000000000000246 R12: 00007fb6973f0330 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 Allocated by task 3606: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:437 [inline] ____kasan_kmalloc+0xcd/0x100 mm/kasan/common.c:516 kasan_kmalloc include/linux/kasan.h:234 [inline] kmem_cache_alloc_trace+0x97/0x310 mm/slub.c:3289 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] nilfs_find_or_create_root+0x142/0x4f0 fs/nilfs2/the_nilfs.c:747 nilfs_attach_checkpoint+0xcd/0x4a0 fs/nilfs2/super.c:519 nilfs_fill_super+0x2e8/0x5d0 fs/nilfs2/super.c:1064 nilfs_mount+0x613/0x9b0 fs/nilfs2/super.c:1317 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x289/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 3606: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x3d/0x60 mm/kasan/common.c:45 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0xd8/0x120 mm/kasan/common.c:367 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1759 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1785 slab_free mm/slub.c:3539 [inline] kfree+0xda/0x210 mm/slub.c:4567 nilfs_evict_inode+0xe5/0x3d0 fs/nilfs2/inode.c:908 evict+0x2a4/0x620 fs/inode.c:664 dispose_list fs/inode.c:697 [inline] evict_inodes+0x658/0x700 fs/inode.c:747 generic_shutdown_super+0x94/0x310 fs/super.c:479 kill_block_super+0x79/0xd0 fs/super.c:1427 deactivate_locked_super+0xa7/0xf0 fs/super.c:331 cleanup_mnt+0x4ce/0x560 fs/namespace.c:1186 task_work_run+0x146/0x1c0 kernel/task_work.c:177 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x6b2/0x2280 kernel/exit.c:813 do_group_exit+0x1fd/0x2b0 kernel/exit.c:943 __do_sys_exit_group kernel/exit.c:954 [inline] __se_sys_exit_group kernel/exit.c:952 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:952 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x2b/0x50 mm/kasan/common.c:38 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348 call_rcu+0x163/0x970 kernel/rcu/tree.c:2796 fib_create_info+0x18d0/0x2410 net/ipv4/fib_semantics.c:1580 fib_table_insert+0x1e5/0x1f50 net/ipv4/fib_trie.c:1236 fib_magic+0x451/0x650 net/ipv4/fib_frontend.c:1098 fib_add_ifaddr+0x143/0x5c0 net/ipv4/fib_frontend.c:1120 fib_netdev_event+0x628/0x740 net/ipv4/fib_frontend.c:1480 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:455 __dev_notify_flags+0x2ef/0x5d0 dev_change_flags+0xe3/0x190 net/core/dev.c:8615 devinet_ioctl+0x8cb/0x1a70 net/ipv4/devinet.c:1146 inet_ioctl+0x314/0x3f0 net/ipv4/af_inet.c:968 sock_do_ioctl net/socket.c:1169 [inline] sock_ioctl+0x53c/0x8d0 net/socket.c:1286 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff8881481f7800 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 48 bytes inside of 256-byte region [ffff8881481f7800, ffff8881481f7900) The buggy address belongs to the physical page: page:ffffea0005207d80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1481f6 head:ffffea0005207d80 order:1 compound_mapcount:0 compound_pincount:0 flags: 0x57ff00000010200(slab|head|node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000010200 0000000000000000 dead000000000001 ffff888012041b40 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 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 11317143355, free_ts 0 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4283 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549 alloc_page_interleave+0x22/0x1c0 mm/mempolicy.c:2103 alloc_slab_page+0x70/0xf0 mm/slub.c:1829 allocate_slab+0x5e/0x520 mm/slub.c:1974 new_slab mm/slub.c:2034 [inline] ___slab_alloc+0x3ee/0xc40 mm/slub.c:3036 __slab_alloc mm/slub.c:3123 [inline] slab_alloc_node mm/slub.c:3214 [inline] slab_alloc mm/slub.c:3256 [inline] __kmalloc+0x2bd/0x370 mm/slub.c:4425 kmalloc include/linux/slab.h:605 [inline] kzalloc include/linux/slab.h:733 [inline] tomoyo_init_log+0x1a16/0x1f80 security/tomoyo/audit.c:275 tomoyo_supervisor+0x38d/0x14f0 security/tomoyo/common.c:2088 tomoyo_audit_mkdev_log security/tomoyo/file.c:197 [inline] tomoyo_mkdev_perm+0x479/0x7c0 security/tomoyo/file.c:885 tomoyo_path_mknod+0x12c/0x1b0 security/tomoyo/tomoyo.c:229 security_path_mknod+0xdc/0x160 security/security.c:1152 init_mknod+0x1ed/0x318 fs/init.c:158 initrd_load+0x22/0xc8 init/do_mounts_initrd.c:147 prepare_namespace+0x6d/0x22d init/do_mounts.c:631 kernel_init_freeable+0x432/0x57b init/main.c:1636 page_owner free stack trace missing Memory state around the buggy address: ffff8881481f7700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881481f7780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8881481f7800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881481f7880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881481f7900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================