EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.
ext4 filesystem being mounted at /355/file0 supports timestamps until 2038-01-19 (0x7fffffff)
EXT4-fs error (device loop2): ext4_group_add:1738: inode #7: comm syz.2.1638: iget: checksum invalid
EXT4-fs warning (device loop2): ext4_group_add:1740: Error opening resize inode
==================================================================
BUG: KCSAN: data-race in mas_state_walk / mas_wmb_replace

write to 0xffff888104f07f00 of 8 bytes by task 9456 on cpu 0:
 mte_set_node_dead lib/maple_tree.c:334 [inline]
 mas_put_in_tree lib/maple_tree.c:1565 [inline]
 mas_topiary_replace lib/maple_tree.c:2341 [inline]
 mas_wmb_replace+0x20d/0x1610 lib/maple_tree.c:2433
 mas_split lib/maple_tree.c:3052 [inline]
 mas_commit_b_node lib/maple_tree.c:3072 [inline]
 mas_wr_bnode lib/maple_tree.c:3739 [inline]
 mas_wr_store_entry+0x16b6/0x2ed0 lib/maple_tree.c:3771
 mas_store_prealloc+0x72e/0xa70 lib/maple_tree.c:5169
 vma_iter_store_overwrite mm/vma.h:607 [inline]
 vma_iter_store_new mm/vma.h:614 [inline]
 __mmap_new_vma mm/vma.c:2553 [inline]
 __mmap_region mm/vma.c:2759 [inline]
 mmap_region+0x1b3b/0x2050 mm/vma.c:2837
 do_mmap+0x9b2/0xbd0 mm/mmap.c:559
 vm_mmap_pgoff+0x183/0x2d0 mm/util.c:581
 ksys_mmap_pgoff+0xc1/0x310 mm/mmap.c:605
 x64_sys_call+0x14df/0x3020 arch/x86/include/generated/asm/syscalls_64.h:10
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888104f07f00 of 8 bytes by task 9457 on cpu 1:
 ma_dead_node lib/maple_tree.c:572 [inline]
 mtree_range_walk lib/maple_tree.c:2580 [inline]
 mas_state_walk+0x485/0x650 lib/maple_tree.c:3298
 mas_walk+0x60/0x150 lib/maple_tree.c:4599
 lock_vma_under_rcu+0xc9/0x210 mm/mmap_lock.c:304
 do_user_addr_fault+0x232/0x1050 arch/x86/mm/fault.c:1325
 handle_page_fault arch/x86/mm/fault.c:1474 [inline]
 exc_page_fault+0x62/0xa0 arch/x86/mm/fault.c:1527
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618

value changed: 0xffff88810a3a2f81 -> 0xffff888104f07f00

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 9457 Comm: syz.2.1638 Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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