syzbot

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BUG: KCSAN: data-race in filemap_read / simple_write_end

write to 0xffff88810b3e4560 of 8 bytes by task 10736 on cpu 0:
 i_size_write include/linux/fs.h:886 [inline]
 simple_write_end+0x11e/0x2f0 fs/libfs.c:619
 generic_perform_write+0x264/0x3f0 mm/filemap.c:3764
 __generic_file_write_iter+0xe3/0x280 mm/filemap.c:3881
 generic_file_write_iter+0x79/0x1c0 mm/filemap.c:3913
 call_write_iter include/linux/fs.h:2191 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x468/0x760 fs/read_write.c:584
 ksys_write+0xe8/0x1a0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x3e/0x50 fs/read_write.c:646
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88810b3e4560 of 8 bytes by task 10748 on cpu 1:
 i_size_read include/linux/fs.h:864 [inline]
 filemap_read+0xfb5/0x1510 mm/filemap.c:2687
 generic_file_read_iter+0x72/0x320 mm/filemap.c:2821
 do_iter_read+0x492/0x760 fs/read_write.c:796
 vfs_readv fs/read_write.c:916 [inline]
 do_preadv+0x159/0x230 fs/read_write.c:1008
 __do_sys_preadv fs/read_write.c:1058 [inline]
 __se_sys_preadv fs/read_write.c:1053 [inline]
 __x64_sys_preadv+0x54/0x60 fs/read_write.c:1053
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000000009d7000 -> 0x00000000009dd000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 10748 Comm: syz-executor.4 Not tainted 6.1.0-rc6-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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