syzbot

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BUG: KCSAN: data-race in getrusage / vms_clear_ptes

write to 0xffff88812fd4baa8 of 8 bytes by task 15086 on cpu 1:
 update_hiwater_rss include/linux/mm.h:2655 [inline]
 vms_clear_ptes+0x1a7/0x300 mm/vma.c:1094
 vms_clean_up_area+0x48/0x120 mm/vma.c:1114
 __mmap_region mm/mmap.c:1426 [inline]
 mmap_region+0x953/0x14a0 mm/mmap.c:1603
 do_mmap+0x718/0xb60 mm/mmap.c:496
 vm_mmap_pgoff+0x133/0x290 mm/util.c:588
 ksys_mmap_pgoff+0xd0/0x330 mm/mmap.c:542
 x64_sys_call+0x1884/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:10
 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 0xffff88812fd4baa8 of 8 bytes by task 15087 on cpu 0:
 get_mm_hiwater_rss include/linux/mm.h:2642 [inline]
 setmax_mm_hiwater_rss include/linux/mm.h:2672 [inline]
 getrusage+0xa35/0xb90 kernel/sys.c:1870
 io_sq_thread+0x539/0x1010 io_uring/sqpoll.c:313
 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: 0x0000000000000e8a -> 0x0000000000000fa1

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 15087 Comm: iou-sqp-15086 Tainted: G        W          6.12.0-syzkaller-00171-g23acd177540d #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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