syzbot

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BUG: KCSAN: data-race in close_fd_get_file / do_select

write to 0xffff88811d087600 of 8 bytes by task 14951 on cpu 0:
 instrument_write include/linux/instrumented.h:41 [inline]
 ___clear_bit include/asm-generic/bitops/instrumented-non-atomic.h:44 [inline]
 __clear_open_fd fs/file.c:270 [inline]
 __put_unused_fd fs/file.c:571 [inline]
 pick_file fs/file.c:652 [inline]
 close_fd_get_file+0xf3/0x1a0 fs/file.c:817
 __do_sys_close fs/open.c:1580 [inline]
 __se_sys_close+0x17/0x1a0 fs/open.c:1575
 __x64_sys_close+0x1f/0x30 fs/open.c:1575
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff88811d087600 of 8 bytes by task 14953 on cpu 1:
 max_select_fd fs/select.c:447 [inline]
 do_select+0x2a2/0xf90 fs/select.c:490
 core_sys_select+0x361/0x520 fs/select.c:681
 do_pselect fs/select.c:763 [inline]
 __do_sys_pselect6 fs/select.c:804 [inline]
 __se_sys_pselect6+0x213/0x280 fs/select.c:795
 __x64_sys_pselect6+0x78/0x90 fs/select.c:795
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0xffffffffffff0007 -> 0xffffffffffe00007

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 14953 Comm: syz-executor.4 Not tainted 6.6.0-syzkaller-15156-g13d88ac54ddd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
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