================================================================== BUG: KCSAN: data-race in copy_page_to_iter / fat_set_state write to 0xffff88812a0b0025 of 1 bytes by task 1399 on cpu 0: fat_set_state+0x16c/0x1d0 fat_fill_super+0x26a4/0x2af0 fs/fat/inode.c:1882 vfat_fill_super+0x2c/0x40 fs/fat/namei_vfat.c:1051 mount_bdev+0x1e8/0x290 fs/super.c:1370 vfat_mount+0x2d/0x40 fs/fat/namei_vfat.c:1058 legacy_get_tree+0x70/0xc0 fs/fs_context.c:610 vfs_get_tree+0x4a/0x1a0 fs/super.c:1500 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x11cf/0x1c40 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount+0x24b/0x2f0 fs/namespace.c:3516 __x64_sys_mount+0x63/0x70 fs/namespace.c:3516 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88812a0b0000 of 1024 bytes by task 28192 on cpu 1: instrument_copy_to_user include/linux/instrumented.h:119 [inline] copyout lib/iov_iter.c:156 [inline] copy_page_to_iter_iovec lib/iov_iter.c:228 [inline] __copy_page_to_iter lib/iov_iter.c:852 [inline] copy_page_to_iter+0x2cb/0x950 lib/iov_iter.c:880 filemap_read+0x138b/0x16d0 mm/filemap.c:2697 generic_file_read_iter+0x72/0x2a0 mm/filemap.c:2792 blkdev_read_iter+0x96/0x140 block/fops.c:583 call_read_iter include/linux/fs.h:2156 [inline] new_sync_read fs/read_write.c:400 [inline] vfs_read+0x66c/0x750 fs/read_write.c:481 ksys_read+0xd9/0x190 fs/read_write.c:619 __do_sys_read fs/read_write.c:629 [inline] __se_sys_read fs/read_write.c:627 [inline] __x64_sys_read+0x3e/0x50 fs/read_write.c:627 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 28192 Comm: udevd Not tainted 5.16.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================