syzbot

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BUG: KCSAN: data-race in mas_wr_store_entry / mtree_range_walk

write to 0xffff88814d786c10 of 8 bytes by task 19406 on cpu 1:
 mas_wr_slot_store lib/maple_tree.c:3910 [inline]
 mas_wr_store_entry+0x1490/0x2d10 lib/maple_tree.c:4095
 mas_store_prealloc+0x6bf/0x960 lib/maple_tree.c:5519
 vma_iter_store mm/vma.h:387 [inline]
 commit_merge+0x441/0x740 mm/vma.c:663
 vma_expand+0x211/0x360 mm/vma.c:1071
 vma_merge_new_range+0x2da/0x340 mm/vma.c:1018
 __mmap_region+0x67c/0x13f0 mm/vma.c:2451
 mmap_region+0x164/0x1e0 mm/mmap.c:1348
 do_mmap+0x718/0xb60 mm/mmap.c:496
 vm_mmap_pgoff+0x133/0x290 mm/util.c:580
 ksys_mmap_pgoff+0xd0/0x330 mm/mmap.c:542
 x64_sys_call+0x1940/0x2dc0 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 0xffff88814d786c10 of 8 bytes by task 19410 on cpu 0:
 mtree_range_walk+0x1b4/0x460 lib/maple_tree.c:2792
 mas_state_walk lib/maple_tree.c:3620 [inline]
 mas_walk+0x16e/0x320 lib/maple_tree.c:4946
 lock_vma_under_rcu+0x95/0x260 mm/memory.c:6274
 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: 0x00007f72be066fff -> 0x00007f72be045fff

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 19410 Comm: syz.8.4952 Not tainted 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
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