syzbot

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BUG: KCSAN: data-race in getrusage / try_to_migrate_one

write to 0xffff88810005d378 of 8 bytes by task 13931 on cpu 0:
 update_hiwater_rss include/linux/mm.h:2669 [inline]
 try_to_migrate_one+0x795/0x12e0 mm/rmap.c:2183
 rmap_walk_anon+0x28f/0x440 mm/rmap.c:2646
 try_to_migrate+0x11f/0x150
 migrate_folio_unmap mm/migrate.c:1320 [inline]
 migrate_pages_batch+0x786/0x1930 mm/migrate.c:1866
 migrate_pages_sync mm/migrate.c:1989 [inline]
 migrate_pages+0xf02/0x1840 mm/migrate.c:2098
 do_mbind mm/mempolicy.c:1394 [inline]
 kernel_mbind mm/mempolicy.c:1537 [inline]
 __do_sys_mbind mm/mempolicy.c:1611 [inline]
 __se_sys_mbind+0xfd1/0x11c0 mm/mempolicy.c:1607
 __x64_sys_mbind+0x78/0x90 mm/mempolicy.c:1607
 x64_sys_call+0x2662/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:238
 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 0xffff88810005d378 of 8 bytes by task 13918 on cpu 1:
 get_mm_hiwater_rss include/linux/mm.h:2656 [inline]
 setmax_mm_hiwater_rss include/linux/mm.h:2686 [inline]
 getrusage+0xa15/0xb70 kernel/sys.c:1872
 io_sq_thread+0x5f9/0x1100 io_uring/sqpoll.c:310
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

value changed: 0x00000000000014e5 -> 0x0000000000005b43

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 13918 Comm: iou-sqp-13917 Not tainted 6.14.0-rc3-syzkaller-00060-g6537cfb395f3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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