==================================================================
BUG: KCSAN: data-race in getrusage / unmap_region

write to 0xffff88811879c0f0 of 8 bytes by task 28472 on cpu 0:
 update_hiwater_rss include/linux/mm.h:2657 [inline]
 unmap_region+0x105/0x230 mm/mmap.c:2309
 do_vmi_align_munmap+0x650/0x9c0 mm/mmap.c:2628
 do_vmi_munmap+0x1eb/0x230 mm/mmap.c:2696
 __vm_munmap+0xe7/0x1d0 mm/mmap.c:2972
 __do_sys_munmap mm/mmap.c:2989 [inline]
 __se_sys_munmap mm/mmap.c:2986 [inline]
 __x64_sys_munmap+0x36/0x40 mm/mmap.c:2986
 x64_sys_call+0xc9d/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:12
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff88811879c0f0 of 8 bytes by task 28473 on cpu 1:
 get_mm_hiwater_rss include/linux/mm.h:2644 [inline]
 setmax_mm_hiwater_rss include/linux/mm.h:2674 [inline]
 getrusage+0xa35/0xb90 kernel/sys.c:1861
 io_sq_thread+0x4d3/0xef0 io_uring/sqpoll.c:305
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

value changed: 0x0000000000000867 -> 0x0000000000000907

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 28473 Comm: iou-sqp-28472 Tainted: G        W          6.9.0-rc6-syzkaller-00046-g18daea77cca6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
==================================================================