syzbot

==================================================================
BUG: KCSAN: data-race in mas_wr_modify / mtree_range_walk

write to 0xffff888104856a10 of 8 bytes by task 5710 on cpu 1:
 mas_wr_slot_store lib/maple_tree.c:3990 [inline]
 mas_wr_modify+0x155c/0x3c90 lib/maple_tree.c:4186
 mas_wr_store_entry+0x250/0x390 lib/maple_tree.c:4227
 mas_store_prealloc+0x151/0x2b0 lib/maple_tree.c:5482
 vma_iter_store mm/internal.h:1452 [inline]
 vma_expand+0x579/0x660 mm/mmap.c:708
 mmap_region+0x806/0x1600 mm/mmap.c:2930
 do_mmap+0x718/0xb60 mm/mmap.c:1468
 vm_mmap_pgoff+0x133/0x290 mm/util.c:588
 ksys_mmap_pgoff+0xd0/0x330 mm/mmap.c:1514
 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 0xffff888104856a10 of 8 bytes by task 5712 on cpu 0:
 mtree_range_walk+0x1b4/0x460 lib/maple_tree.c:2782
 mas_state_walk lib/maple_tree.c:3678 [inline]
 mas_walk+0x16e/0x320 lib/maple_tree.c:4906
 lock_vma_under_rcu+0x84/0x260 mm/memory.c:6011
 do_user_addr_fault arch/x86/mm/fault.c:1329 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x150/0x650 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623

value changed: 0x00007f327b4affff -> 0x00007f327b48efff

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 5712 Comm: syz.2.913 Not tainted 6.11.0-syzkaller-04557-g2f27fce67173 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
==================================================================