KCSAN: data-race in close_fd_get_file / do

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in close_fd_get_file / do_select (2) fs	6				1	704d	694d	0/29	auto-obsoleted due to no activity on 2023/12/13 06:44

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BUG: KCSAN: data-race in close_fd_get_file / do_select

write to 0xffff8881205ebcc0 of 8 bytes by task 3011 on cpu 1:
 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:649 [inline]
 close_fd_get_file+0xf3/0x1a0 fs/file.c:814
 __do_sys_close fs/open.c:1562 [inline]
 __se_sys_close+0x17/0x1a0 fs/open.c:1557
 __x64_sys_close+0x1f/0x30 fs/open.c:1557
 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 0xffff8881205ebcc0 of 8 bytes by task 3013 on cpu 0:
 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
 kern_select fs/select.c:722 [inline]
 __do_sys_select fs/select.c:729 [inline]
 __se_sys_select+0x1c7/0x200 fs/select.c:726
 __x64_sys_select+0x67/0x80 fs/select.c:726
 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

value changed: 0xfffffffffffe0007 -> 0xfffffffffc000007

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3013 Comm: syz-executor.0 Not tainted 6.5.0-syzkaller-13150-g535a265d7f0d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
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