syzbot

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BUG: KCSAN: data-race in getrusage / vms_clear_ptes

write to 0xffff88811a34f480 of 8 bytes by task 20697 on cpu 0:
 update_hiwater_rss include/linux/mm.h:2771 [inline]
 vms_clear_ptes+0x18c/0x2d0 mm/vma.c:1183
 vms_complete_munmap_vmas+0x159/0x440 mm/vma.c:1233
 do_vmi_align_munmap+0x383/0x3d0 mm/vma.c:1492
 do_vmi_munmap+0x1db/0x220 mm/vma.c:1540
 __vm_munmap+0x1a1/0x280 mm/vma.c:3013
 __do_sys_munmap mm/mmap.c:1084 [inline]
 __se_sys_munmap mm/mmap.c:1081 [inline]
 __x64_sys_munmap+0x36/0x50 mm/mmap.c:1081
 x64_sys_call+0xa65/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:12
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd0/0x1a0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff88811a34f480 of 8 bytes by task 20698 on cpu 1:
 get_mm_hiwater_rss include/linux/mm.h:2758 [inline]
 setmax_mm_hiwater_rss include/linux/mm.h:2788 [inline]
 getrusage+0xa52/0xbb0 kernel/sys.c:1876
 io_sq_thread+0x5dd/0x1110 io_uring/sqpoll.c:310
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

value changed: 0x00000000000014eb -> 0x0000000000001715

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 20698 Comm: iou-sqp-20697 Not tainted 6.15.0-rc6-syzkaller-00085-gc94d59a126cb #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
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