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BUG: KCSAN: data-race in atime_needs_update / touch_atime

write to 0xffff8881046cec88 of 4 bytes by task 5792 on cpu 0:
 inode_set_atime_to_ts include/linux/fs.h:1672 [inline]
 inode_update_timestamps fs/inode.c:2035 [inline]
 generic_update_time fs/inode.c:2057 [inline]
 inode_update_time fs/inode.c:2077 [inline]
 touch_atime+0x1e8/0x330 fs/inode.c:2149
 pick_link+0x33b/0x820 fs/namei.c:1924
 step_into+0x7b6/0x820 fs/namei.c:2008
 walk_component+0x162/0x220 fs/namei.c:2144
 lookup_last fs/namei.c:2636 [inline]
 path_lookupat+0xfe/0x2a0 fs/namei.c:2660
 do_o_path+0x45/0x130 fs/namei.c:4010
 path_openat+0x1df9/0x2170 fs/namei.c:4032
 do_filp_open+0x109/0x230 fs/namei.c:4066
 io_openat2+0x272/0x390 io_uring/openclose.c:140
 io_openat+0x1b/0x30 io_uring/openclose.c:177
 __io_issue_sqe+0xfe/0x2e0 io_uring/io_uring.c:1734
 io_issue_sqe+0x53/0x970 io_uring/io_uring.c:1757
 io_wq_submit_work+0x3f7/0x5f0 io_uring/io_uring.c:1869
 io_worker_handle_work+0x46d/0x9f0 io_uring/io-wq.c:615
 io_wq_worker+0x22e/0x870 io_uring/io-wq.c:669
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffff8881046cec88 of 4 bytes by task 5789 on cpu 1:
 atime_needs_update+0x25f/0x3e0 fs/inode.c:-1
 pick_link+0x31a/0x820 fs/namei.c:1921
 step_into+0x7b6/0x820 fs/namei.c:2008
 walk_component+0x162/0x220 fs/namei.c:2144
 lookup_last fs/namei.c:2636 [inline]
 path_lookupat+0xfe/0x2a0 fs/namei.c:2660
 do_o_path+0x45/0x130 fs/namei.c:4010
 path_openat+0x1df9/0x2170 fs/namei.c:4032
 do_filp_open+0x109/0x230 fs/namei.c:4066
 io_openat2+0x272/0x390 io_uring/openclose.c:140
 io_openat+0x1b/0x30 io_uring/openclose.c:177
 __io_issue_sqe+0xfe/0x2e0 io_uring/io_uring.c:1734
 io_issue_sqe+0x53/0x970 io_uring/io_uring.c:1757
 io_queue_sqe io_uring/io_uring.c:1963 [inline]
 io_submit_sqe io_uring/io_uring.c:2219 [inline]
 io_submit_sqes+0x64c/0x1000 io_uring/io_uring.c:2336
 __do_sys_io_uring_enter io_uring/io_uring.c:3396 [inline]
 __se_sys_io_uring_enter+0x1c1/0x1b70 io_uring/io_uring.c:3330
 __x64_sys_io_uring_enter+0x78/0x90 io_uring/io_uring.c:3330
 x64_sys_call+0x28c8/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:427
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd0/0x1a0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x16427af2 -> 0x16db1172

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 5789 Comm:  Tainted: G        W           6.15.0-rc6-syzkaller-00052-g9f35e33144ae #0 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
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