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BUG: KCSAN: data-race in atime_needs_update / touch_atime

read to 0xffff888100562658 of 4 bytes by task 7034 on cpu 0:
 atime_needs_update+0x25f/0x3e0 fs/inode.c:-1
 pick_link+0x36e/0x8e0 fs/namei.c:2041
 step_into_slowpath+0x36a/0x4c0 fs/namei.c:2124
 step_into fs/namei.c:2149 [inline]
 open_last_lookups fs/namei.c:4624 [inline]
 path_openat+0x15d0/0x2050 fs/namei.c:4833
 do_file_open+0x16c/0x290 fs/namei.c:4865
 do_sys_openat2+0x94/0x130 fs/open.c:1366
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_openat fs/open.c:1388 [inline]
 __se_sys_openat fs/open.c:1383 [inline]
 __x64_sys_openat+0xf2/0x120 fs/open.c:1383
 x64_sys_call+0x1e39/0x3020 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffff888100562658 of 4 bytes by task 7033 on cpu 1:
 inode_set_atime_to_ts include/linux/fs.h:1625 [inline]
 inode_update_atime fs/inode.c:2104 [inline]
 inode_update_time fs/inode.c:2162 [inline]
 generic_update_time fs/inode.c:2195 [inline]
 touch_atime+0x1d7/0x330 fs/inode.c:2273
 pick_link+0x7e9/0x8e0 fs/namei.c:2046
 step_into_slowpath+0x36a/0x4c0 fs/namei.c:2124
 step_into fs/namei.c:2149 [inline]
 open_last_lookups fs/namei.c:4624 [inline]
 path_openat+0x15d0/0x2050 fs/namei.c:4833
 do_file_open+0x16c/0x290 fs/namei.c:4865
 do_sys_openat2+0x94/0x130 fs/open.c:1366
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_openat fs/open.c:1388 [inline]
 __se_sys_openat fs/open.c:1383 [inline]
 __x64_sys_openat+0xf2/0x120 fs/open.c:1383
 x64_sys_call+0x1e39/0x3020 arch/x86/include/generated/asm/syscalls_64.h:258
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x103d8259 -> 0x159accdb

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 7033 Comm: syz.8.757 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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