================================================================== BUG: KCSAN: data-race in _copy_to_iter / fat_set_state write to 0xffff888149081025 of 1 bytes by task 12041 on cpu 1: fat_set_state+0x16e/0x1d0 fat_put_super+0x2e/0x80 fs/fat/inode.c:737 generic_shutdown_super+0xdb/0x210 fs/super.c:696 kill_block_super+0x2a/0x60 fs/super.c:1667 deactivate_locked_super+0x7a/0x1c0 fs/super.c:484 deactivate_super+0x9b/0xb0 fs/super.c:517 cleanup_mnt+0x272/0x2e0 fs/namespace.c:1256 __cleanup_mnt+0x19/0x20 fs/namespace.c:1263 task_work_run+0x135/0x1a0 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd6/0xe0 kernel/entry/common.c:171 exit_to_user_mode_prepare+0x6c/0xb0 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:296 do_syscall_64+0x50/0x110 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x63/0x6b read to 0xffff888149081000 of 1024 bytes by task 12046 on cpu 0: instrument_copy_to_user include/linux/instrumented.h:113 [inline] copy_to_user_iter lib/iov_iter.c:24 [inline] iterate_ubuf include/linux/iov_iter.h:29 [inline] iterate_and_advance2 include/linux/iov_iter.h:245 [inline] iterate_and_advance include/linux/iov_iter.h:271 [inline] _copy_to_iter+0x126/0xb20 lib/iov_iter.c:186 copy_page_to_iter+0x171/0x2b0 lib/iov_iter.c:381 copy_folio_to_iter include/linux/uio.h:181 [inline] filemap_read+0x42c/0x680 mm/filemap.c:2653 blkdev_read_iter+0x217/0x2c0 block/fops.c:742 call_read_iter include/linux/fs.h:2014 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x3c0/0x590 fs/read_write.c:470 ksys_read+0xeb/0x1a0 fs/read_write.c:613 __do_sys_read fs/read_write.c:623 [inline] __se_sys_read fs/read_write.c:621 [inline] __x64_sys_read+0x42/0x50 fs/read_write.c:621 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 12046 Comm: udevd Not tainted 6.7.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 ================================================================== I/O error, dev loop1, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev loop0, logical block 0, async page read I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2 I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 Buffer I/O error on dev loop0, logical block 0, async page read I/O error, dev loop4, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2