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BUG: KCSAN: data-race in inode_update_timestamps / inode_update_timestamps

write to 0xffff88811510af78 of 4 bytes by task 7174 on cpu 1:
 inode_set_ctime_to_ts include/linux/fs.h:1637 [inline]
 inode_set_ctime_current fs/inode.c:2591 [inline]
 inode_update_timestamps+0xaf/0x280 fs/inode.c:1923
 generic_update_time fs/inode.c:1962 [inline]
 inode_update_time fs/inode.c:1982 [inline]
 __file_update_time fs/inode.c:2171 [inline]
 file_update_time+0x229/0x2c0 fs/inode.c:2201
 fault_dirty_shared_page+0xde/0x340 mm/memory.c:3184
 do_shared_fault mm/memory.c:5149 [inline]
 do_fault mm/memory.c:5195 [inline]
 do_pte_missing mm/memory.c:3947 [inline]
 handle_pte_fault mm/memory.c:5522 [inline]
 __handle_mm_fault mm/memory.c:5665 [inline]
 handle_mm_fault+0x1399/0x2940 mm/memory.c:5833
 faultin_page mm/gup.c:1194 [inline]
 __get_user_pages+0x499/0x10d0 mm/gup.c:1493
 __get_user_pages_locked mm/gup.c:1760 [inline]
 __gup_longterm_locked+0xdcd/0x10b0 mm/gup.c:2489
 pin_user_pages_remote+0x7f/0xb0 mm/gup.c:3528
 process_vm_rw_single_vec mm/process_vm_access.c:106 [inline]
 process_vm_rw_core mm/process_vm_access.c:216 [inline]
 process_vm_rw+0x4f7/0x8c0 mm/process_vm_access.c:284
 __do_sys_process_vm_writev mm/process_vm_access.c:304 [inline]
 __se_sys_process_vm_writev mm/process_vm_access.c:299 [inline]
 __x64_sys_process_vm_writev+0x7a/0x90 mm/process_vm_access.c:299
 x64_sys_call+0x1a4/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:312
 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

read to 0xffff88811510af78 of 4 bytes by task 7175 on cpu 0:
 inode_get_ctime_nsec include/linux/fs.h:1622 [inline]
 inode_get_ctime include/linux/fs.h:1628 [inline]
 inode_update_timestamps+0x56/0x280 fs/inode.c:1920
 generic_update_time fs/inode.c:1962 [inline]
 inode_update_time fs/inode.c:1982 [inline]
 __file_update_time fs/inode.c:2171 [inline]
 file_update_time+0x229/0x2c0 fs/inode.c:2201
 fault_dirty_shared_page+0xde/0x340 mm/memory.c:3184
 do_shared_fault mm/memory.c:5149 [inline]
 do_fault mm/memory.c:5195 [inline]
 do_pte_missing mm/memory.c:3947 [inline]
 handle_pte_fault mm/memory.c:5522 [inline]
 __handle_mm_fault mm/memory.c:5665 [inline]
 handle_mm_fault+0x1399/0x2940 mm/memory.c:5833
 faultin_page mm/gup.c:1194 [inline]
 __get_user_pages+0x499/0x10d0 mm/gup.c:1493
 __get_user_pages_locked mm/gup.c:1760 [inline]
 __gup_longterm_locked+0xdcd/0x10b0 mm/gup.c:2489
 pin_user_pages_remote+0x7f/0xb0 mm/gup.c:3528
 process_vm_rw_single_vec mm/process_vm_access.c:106 [inline]
 process_vm_rw_core mm/process_vm_access.c:216 [inline]
 process_vm_rw+0x4f7/0x8c0 mm/process_vm_access.c:284
 __do_sys_process_vm_writev mm/process_vm_access.c:304 [inline]
 __se_sys_process_vm_writev mm/process_vm_access.c:299 [inline]
 __x64_sys_process_vm_writev+0x7a/0x90 mm/process_vm_access.c:299
 x64_sys_call+0x1a4/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:312
 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

value changed: 0x2b7aef70 -> 0x2c1385f0

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 7175 Comm: syz.4.1079 Not tainted 6.11.0-rc2-syzkaller-00042-gcf6d429eb656 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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