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BUG: KCSAN: data-race in io_prep_async_work / prepare_creds

write to 0xffff888103307b28 of 4 bytes by task 4970 on cpu 1:
 get_cred_many include/linux/cred.h:222 [inline]
 get_cred include/linux/cred.h:238 [inline]
 io_prep_async_work+0x9b/0x3c0 io_uring/io_uring.c:367
 io_prep_async_link io_uring/io_uring.c:406 [inline]
 io_drain_req+0x10b/0x330 io_uring/io_uring.c:1341
 io_queue_sqe_fallback+0x13d/0x140 io_uring/io_uring.c:1665
 io_submit_sqe io_uring/io_uring.c:1920 [inline]
 io_submit_sqes+0xd43/0x1180 io_uring/io_uring.c:2048
 __do_sys_io_uring_enter io_uring/io_uring.c:2637 [inline]
 __se_sys_io_uring_enter+0x25c/0xf90 io_uring/io_uring.c:2586
 __x64_sys_io_uring_enter+0x78/0x90 io_uring/io_uring.c:2586
 x64_sys_call+0x1780/0x2550 arch/x86/include/generated/asm/syscalls_64.h:427
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888103307a80 of 184 bytes by task 4977 on cpu 0:
 prepare_creds+0x71/0x550 kernel/cred.c:192
 __do_sys_capset kernel/capability.c:247 [inline]
 __se_sys_capset+0x2da/0x480 kernel/capability.c:216
 __x64_sys_capset+0x31/0x40 kernel/capability.c:216
 x64_sys_call+0x1515/0x2550 arch/x86/include/generated/asm/syscalls_64.h:127
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 4977 Comm: syz.8.251 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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