syzbot

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BUG: KCSAN: data-race in getrusage / vms_clear_ptes

write to 0xffff8881046ee318 of 8 bytes by task 6593 on cpu 1:
 update_hiwater_rss include/linux/mm.h:2657 [inline]
 vms_clear_ptes+0x18f/0x2d0 mm/vma.c:1227
 vms_complete_munmap_vmas+0x159/0x440 mm/vma.c:1277
 do_vmi_align_munmap+0x383/0x3d0 mm/vma.c:1536
 do_vmi_munmap+0x1db/0x220 mm/vma.c:1584
 __vm_munmap+0x1a1/0x280 mm/vma.c:3155
 __do_sys_munmap mm/mmap.c:1080 [inline]
 __se_sys_munmap mm/mmap.c:1077 [inline]
 __x64_sys_munmap+0x36/0x50 mm/mmap.c:1077
 x64_sys_call+0x9c0/0x3000 arch/x86/include/generated/asm/syscalls_64.h:12
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff8881046ee318 of 8 bytes by task 6596 on cpu 0:
 get_mm_hiwater_rss include/linux/mm.h:2644 [inline]
 setmax_mm_hiwater_rss include/linux/mm.h:2674 [inline]
 getrusage+0xa52/0xbb0 kernel/sys.c:1906
 io_sq_thread+0x5ce/0x1170 io_uring/sqpoll.c:320
 ret_from_fork+0x11f/0x1b0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x000000000000151c -> 0x0000000000001906

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 6596 Comm: iou-sqp-6593 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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