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BUG: KCSAN: data-race in _copy_to_iter / fat_set_state
write to 0xffff88814087c025 of 1 bytes by task 16594 on cpu 1:
fat_set_state+0x16e/0x1d0
fat_fill_super+0x2479/0x28e0 fs/fat/inode.c:1877
vfat_fill_super+0x30/0x40 fs/fat/namei_vfat.c:1200
mount_bdev+0x1c4/0x260 fs/super.c:1391
vfat_mount+0x31/0x40 fs/fat/namei_vfat.c:1207
legacy_get_tree+0x74/0xd0 fs/fs_context.c:611
vfs_get_tree+0x51/0x190 fs/super.c:1519
do_new_mount+0x203/0x660 fs/namespace.c:3335
path_mount+0x496/0xb30 fs/namespace.c:3662
do_mount fs/namespace.c:3675 [inline]
__do_sys_mount fs/namespace.c:3884 [inline]
__se_sys_mount+0x27f/0x2d0 fs/namespace.c:3861
__x64_sys_mount+0x67/0x80 fs/namespace.c:3861
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
read to 0xffff88814087c000 of 1024 bytes by task 3337 on cpu 0:
instrument_copy_to_user include/linux/instrumented.h:113 [inline]
copyout lib/iov_iter.c:167 [inline]
_copy_to_iter+0x12b/0x910 lib/iov_iter.c:316
copy_page_to_iter+0x184/0x2c0 lib/iov_iter.c:481
copy_folio_to_iter include/linux/uio.h:185 [inline]
filemap_read+0x421/0x670 mm/filemap.c:2709
blkdev_read_iter+0x217/0x2c0 block/fops.c:617
call_read_iter include/linux/fs.h:1871 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x3da/0x5c0 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:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3337 Comm: udevd Not tainted 6.5.0-rc6-syzkaller-00027-g91aa6c412d7f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
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I/O error, dev loop2, 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 loop2, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
I/O error, dev loop2, 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