KCSAN: data-race in __se_sys_io_uring_register / io_sqe_files

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __se_sys_io_uring_register / io_sqe_files_register (2) io-uring	6				1	892d	892d	0/29	auto-obsoleted due to no activity on 2024/03/23 00:07
upstream	KCSAN: data-race in __se_sys_io_uring_register / io_sqe_files_register (3) io-uring	6				1	624d	622d	28/29	fixed on 2025/05/06 15:33

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BUG: KCSAN: data-race in __se_sys_io_uring_register / io_sqe_files_register

read-write to 0xffff88813a0e70a0 of 4 bytes by task 17960 on cpu 0:
 io_sqe_files_register+0x2f4/0x3f0 io_uring/rsrc.c:873
 __io_uring_register io_uring/io_uring.c:4303 [inline]
 __do_sys_io_uring_register io_uring/io_uring.c:4469 [inline]
 __se_sys_io_uring_register+0x3eb/0x1040 io_uring/io_uring.c:4429
 __x64_sys_io_uring_register+0x55/0x60 io_uring/io_uring.c:4429
 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 0xffff88813a0e70a0 of 4 bytes by task 17964 on cpu 1:
 __do_sys_io_uring_register io_uring/io_uring.c:4471 [inline]
 __se_sys_io_uring_register+0xc2c/0x1040 io_uring/io_uring.c:4429
 __x64_sys_io_uring_register+0x55/0x60 io_uring/io_uring.c:4429
 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: 0x00000000 -> 0x00000003

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 17964 Comm: syz-executor.3 Not tainted 6.4.0-rc4-syzkaller-00047-gafead42fdfca #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
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