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BUG: KCSAN: data-race in atime_needs_update / touch_atime

write to 0xffff88811af9a6b8 of 4 bytes by task 4403 on cpu 1:
 inode_set_atime_to_ts include/linux/fs.h:1624 [inline]
 inode_update_timestamps fs/inode.c:2126 [inline]
 generic_update_time fs/inode.c:2148 [inline]
 inode_update_time fs/inode.c:2168 [inline]
 touch_atime+0x1e8/0x340 fs/inode.c:2240
 pick_link+0x7e8/0x8d0 fs/namei.c:1988
 step_into_slowpath+0x351/0x480 fs/namei.c:2066
 step_into fs/namei.c:2091 [inline]
 walk_component fs/namei.c:2227 [inline]
 lookup_last fs/namei.c:2722 [inline]
 path_lookupat+0x330/0x500 fs/namei.c:2746
 do_o_path+0x45/0x130 fs/namei.c:4758
 path_openat+0x2069/0x23b0 fs/namei.c:4780
 do_filp_open+0x109/0x230 fs/namei.c:4814
 io_openat2+0x272/0x390 io_uring/openclose.c:143
 io_openat+0x1b/0x30 io_uring/openclose.c:180
 __io_issue_sqe+0xfe/0x2e0 io_uring/io_uring.c:1792
 io_issue_sqe+0x56/0xa80 io_uring/io_uring.c:1815
 io_wq_submit_work+0x3f7/0x5f0 io_uring/io_uring.c:1927
 io_worker_handle_work+0x44e/0x9b0 io_uring/io-wq.c:650
 io_wq_worker+0x22e/0x860 io_uring/io-wq.c:704
 ret_from_fork+0x149/0x290 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246

read to 0xffff88811af9a6b8 of 4 bytes by task 4402 on cpu 0:
 atime_needs_update+0x25f/0x3e0 fs/inode.c:-1
 pick_link+0x372/0x8d0 fs/namei.c:1983
 step_into_slowpath+0x351/0x480 fs/namei.c:2066
 step_into fs/namei.c:2091 [inline]
 walk_component fs/namei.c:2227 [inline]
 lookup_last fs/namei.c:2722 [inline]
 path_lookupat+0x330/0x500 fs/namei.c:2746
 do_o_path+0x45/0x130 fs/namei.c:4758
 path_openat+0x2069/0x23b0 fs/namei.c:4780
 do_filp_open+0x109/0x230 fs/namei.c:4814
 io_openat2+0x272/0x390 io_uring/openclose.c:143
 io_openat+0x1b/0x30 io_uring/openclose.c:180
 __io_issue_sqe+0xfe/0x2e0 io_uring/io_uring.c:1792
 io_issue_sqe+0x56/0xa80 io_uring/io_uring.c:1815
 io_queue_sqe io_uring/io_uring.c:2042 [inline]
 io_submit_sqe io_uring/io_uring.c:2320 [inline]
 io_submit_sqes+0x78b/0x11b0 io_uring/io_uring.c:2434
 __do_sys_io_uring_enter io_uring/io_uring.c:3280 [inline]
 __se_sys_io_uring_enter+0x1bd/0x1a30 io_uring/io_uring.c:3219
 __x64_sys_io_uring_enter+0x78/0x90 io_uring/io_uring.c:3219
 x64_sys_call+0x27e4/0x3000 arch/x86/include/generated/asm/syscalls_64.h:427
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xca/0x2b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0dbe7b0f -> 0x0e57118f

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 4402 Comm: syz.3.355 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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