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BUG: KCSAN: data-race in file_update_time / inode_update_timestamps

write to 0xffff888167d5782c of 4 bytes by task 11401 on cpu 1:
 inode_set_mtime_to_ts include/linux/fs.h:1648 [inline]
 inode_update_timestamps+0x139/0x250 fs/inode.c:2070
 generic_update_time fs/inode.c:2105 [inline]
 inode_update_time fs/inode.c:2125 [inline]
 __file_update_time fs/inode.c:2353 [inline]
 file_update_time+0x219/0x2b0 fs/inode.c:2383
 fault_dirty_shared_page+0xde/0x340 mm/memory.c:3218
 do_shared_fault mm/memory.c:5414 [inline]
 do_fault mm/memory.c:5460 [inline]
 do_pte_missing mm/memory.c:3979 [inline]
 handle_pte_fault mm/memory.c:5801 [inline]
 __handle_mm_fault mm/memory.c:5944 [inline]
 handle_mm_fault+0x1389/0x2ac0 mm/memory.c:6112
 faultin_page mm/gup.c:1196 [inline]
 __get_user_pages+0xf2c/0x2670 mm/gup.c:1494
 __get_user_pages_locked mm/gup.c:1760 [inline]
 faultin_page_range+0x352/0x5d0 mm/gup.c:1984
 madvise_populate mm/madvise.c:951 [inline]
 do_madvise+0x42b/0x2a70 mm/madvise.c:1681
 __do_sys_madvise mm/madvise.c:1700 [inline]
 __se_sys_madvise mm/madvise.c:1698 [inline]
 __x64_sys_madvise+0x61/0x70 mm/madvise.c:1698
 x64_sys_call+0x23ab/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:29
 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 0xffff888167d5782c of 4 bytes by task 11410 on cpu 0:
 inode_get_mtime_nsec include/linux/fs.h:1634 [inline]
 inode_get_mtime include/linux/fs.h:1640 [inline]
 inode_needs_update_time fs/inode.c:2332 [inline]
 file_update_time+0x8b/0x2b0 fs/inode.c:2379
 fault_dirty_shared_page+0xde/0x340 mm/memory.c:3218
 do_shared_fault mm/memory.c:5414 [inline]
 do_fault mm/memory.c:5460 [inline]
 do_pte_missing mm/memory.c:3979 [inline]
 handle_pte_fault mm/memory.c:5801 [inline]
 __handle_mm_fault mm/memory.c:5944 [inline]
 handle_mm_fault+0x1389/0x2ac0 mm/memory.c:6112
 faultin_page mm/gup.c:1196 [inline]
 __get_user_pages+0xf2c/0x2670 mm/gup.c:1494
 __get_user_pages_locked mm/gup.c:1760 [inline]
 faultin_page_range+0x352/0x5d0 mm/gup.c:1984
 madvise_populate mm/madvise.c:951 [inline]
 do_madvise+0x42b/0x2a70 mm/madvise.c:1681
 __do_sys_madvise mm/madvise.c:1700 [inline]
 __se_sys_madvise mm/madvise.c:1698 [inline]
 __x64_sys_madvise+0x61/0x70 mm/madvise.c:1698
 x64_sys_call+0x23ab/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:29
 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: 0x088afe83 -> 0x09239503

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 11410 Comm: syz.2.11739 Not tainted 6.13.0-rc6-syzkaller-00130-g2144da25584e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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