================================================================== BUG: KCSAN: data-race in __filemap_add_folio / nr_blockdev_pages read-write to 0xffff888100631e70 of 8 bytes by task 21041 on cpu 0: __filemap_add_folio+0x4c1/0x730 mm/filemap.c:903 filemap_add_folio+0x70/0x160 mm/filemap.c:938 __filemap_get_folio+0x2f1/0x5a0 mm/filemap.c:1927 grow_dev_folio fs/buffer.c:1042 [inline] grow_buffers fs/buffer.c:1108 [inline] __getblk_slow fs/buffer.c:1134 [inline] bdev_getblk+0x1a5/0x430 fs/buffer.c:1429 __bread_gfp+0x5f/0x290 fs/buffer.c:1474 sb_bread include/linux/buffer_head.h:321 [inline] fat__get_entry fs/fat/dir.c:100 [inline] fat_get_entry+0x482/0x5f0 fs/fat/dir.c:128 fat_get_short_entry fs/fat/dir.c:873 [inline] fat_subdirs+0xfa/0x190 fs/fat/dir.c:939 fat_read_root+0x2d9/0x320 fs/fat/inode.c:1420 fat_fill_super+0x21b0/0x28e0 fs/fat/inode.c:1867 vfat_fill_super+0x30/0x40 fs/fat/namei_vfat.c:1200 mount_bdev+0x14f/0x1e0 fs/super.c:1658 vfat_mount+0x31/0x40 fs/fat/namei_vfat.c:1207 legacy_get_tree+0x74/0xd0 fs/fs_context.c:662 vfs_get_tree+0x53/0x1d0 fs/super.c:1779 do_new_mount+0x227/0x690 fs/namespace.c:3352 path_mount+0x496/0xb30 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x27f/0x2d0 fs/namespace.c:3875 __x64_sys_mount+0x67/0x80 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b read to 0xffff888100631e70 of 8 bytes by task 3179 on cpu 1: nr_blockdev_pages+0x7c/0xd0 block/bdev.c:449 si_meminfo+0x87/0xd0 mm/show_mem.c:80 update_defense_level+0x46/0x600 net/netfilter/ipvs/ip_vs_ctl.c:101 defense_work_handler+0x1f/0x80 net/netfilter/ipvs/ip_vs_ctl.c:235 process_one_work kernel/workqueue.c:2633 [inline] process_scheduled_works+0x5b8/0xa40 kernel/workqueue.c:2706 worker_thread+0x525/0x730 kernel/workqueue.c:2787 kthread+0x1d7/0x210 kernel/kthread.c:388 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:243 value changed: 0x0000000000000021 -> 0x0000000000000022 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 3179 Comm: kworker/1:4 Not tainted 6.8.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Workqueue: events_long defense_work_handler ==================================================================