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BUG: KCSAN: data-race in file_update_time / inode_update_timestamps

read to 0xffff888115fae9a8 of 4 bytes by task 23121 on cpu 0:
 inode_get_ctime_nsec include/linux/fs.h:1663 [inline]
 inode_get_ctime include/linux/fs.h:1669 [inline]
 inode_needs_update_time fs/inode.c:2226 [inline]
 file_update_time+0xfe/0x2b0 fs/inode.c:2269
 fault_dirty_shared_page+0xde/0x340 mm/memory.c:3204
 do_shared_fault mm/memory.c:5374 [inline]
 do_fault mm/memory.c:5420 [inline]
 do_pte_missing mm/memory.c:3965 [inline]
 handle_pte_fault mm/memory.c:5751 [inline]
 __handle_mm_fault mm/memory.c:5894 [inline]
 handle_mm_fault+0x1370/0x2a80 mm/memory.c:6062
 do_user_addr_fault arch/x86/mm/fault.c:1389 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x296/0x650 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
 __put_user_4+0x11/0x20 arch/x86/lib/putuser.S:86
 do_recvmmsg+0x40f/0x740 net/socket.c:2963
 __sys_recvmmsg net/socket.c:3036 [inline]
 __do_sys_recvmmsg net/socket.c:3059 [inline]
 __se_sys_recvmmsg net/socket.c:3052 [inline]
 __x64_sys_recvmmsg+0xe2/0x170 net/socket.c:3052
 x64_sys_call+0x26e3/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:300
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffff888115fae9a8 of 4 bytes by task 23119 on cpu 1:
 inode_set_ctime_to_ts include/linux/fs.h:1678 [inline]
 inode_set_ctime_current fs/inode.c:2662 [inline]
 inode_update_timestamps+0xaf/0x280 fs/inode.c:1995
 generic_update_time fs/inode.c:2034 [inline]
 inode_update_time fs/inode.c:2054 [inline]
 __file_update_time fs/inode.c:2243 [inline]
 file_update_time+0x220/0x2b0 fs/inode.c:2273
 fault_dirty_shared_page+0xde/0x340 mm/memory.c:3204
 do_shared_fault mm/memory.c:5374 [inline]
 do_fault mm/memory.c:5420 [inline]
 do_pte_missing mm/memory.c:3965 [inline]
 handle_pte_fault mm/memory.c:5751 [inline]
 __handle_mm_fault mm/memory.c:5894 [inline]
 handle_mm_fault+0x1370/0x2a80 mm/memory.c:6062
 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x3b9/0x650 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623

value changed: 0x1a39eacc -> 0x24f47fcd

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 23119 Comm: syz.4.15353 Tainted: G        W          6.12.0-rc2-syzkaller-00006-g87d6aab2389e #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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