==================================================================
BUG: KCSAN: data-race in mas_walk / mas_wmb_replace

write to 0xffff8881044fa100 of 8 bytes by task 14037 on cpu 1:
 mte_set_node_dead lib/maple_tree.c:323 [inline]
 mas_put_in_tree lib/maple_tree.c:1726 [inline]
 mas_topiary_replace lib/maple_tree.c:2555 [inline]
 mas_wmb_replace+0x20f/0x14f0 lib/maple_tree.c:2646
 mas_split lib/maple_tree.c:3393 [inline]
 mas_commit_b_node lib/maple_tree.c:3446 [inline]
 mas_wr_bnode lib/maple_tree.c:4158 [inline]
 mas_wr_modify+0x183d/0x3c90 lib/maple_tree.c:4196
 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_complete+0x3a7/0x760 mm/mmap.c:576
 __split_vma+0x61d/0x690 mm/mmap.c:2511
 split_vma mm/mmap.c:2537 [inline]
 vma_modify+0x198/0x1f0 mm/mmap.c:2578
 vma_modify_flags include/linux/mm.h:3318 [inline]
 mprotect_fixup+0x335/0x610 mm/mprotect.c:639
 do_mprotect_pkey+0x673/0x9a0 mm/mprotect.c:822
 __do_sys_mprotect mm/mprotect.c:843 [inline]
 __se_sys_mprotect mm/mprotect.c:840 [inline]
 __x64_sys_mprotect+0x48/0x60 mm/mprotect.c:840
 x64_sys_call+0x26cf/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:11
 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 0xffff8881044fa100 of 8 bytes by task 14041 on cpu 0:
 mte_parent lib/maple_tree.c:545 [inline]
 mte_dead_node lib/maple_tree.c:577 [inline]
 mas_start lib/maple_tree.c:1369 [inline]
 mas_state_walk lib/maple_tree.c:3671 [inline]
 mas_walk+0x123/0x320 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: 0xffff88810dc20581 -> 0xffff8881044fa100

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 14041 Comm: syz.0.3916 Not tainted 6.11.0-syzkaller-04557-g2f27fce67173 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
==================================================================