syzbot

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BUG: KCSAN: data-race in __es_shrink / __es_shrink

read to 0xffff888103968578 of 8 bytes by task 19040 on cpu 0:
 __es_shrink+0x336/0x560 fs/ext4/extents_status.c:1530
 ext4_es_scan+0x84/0x270 fs/ext4/extents_status.c:1571
 do_shrink_slab+0x2a0/0x640 mm/vmscan.c:912
 shrink_slab+0x11b/0x650 mm/vmscan.c:1075
 shrink_node_memcgs mm/vmscan.c:6469 [inline]
 shrink_node+0xadf/0x1500 mm/vmscan.c:6502
 shrink_zones mm/vmscan.c:6737 [inline]
 do_try_to_free_pages+0x40d/0xc80 mm/vmscan.c:6799
 try_to_free_pages+0x3f5/0x930 mm/vmscan.c:7034
 __perform_reclaim mm/page_alloc.c:3969 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:3991 [inline]
 __alloc_pages_slowpath+0x4e6/0xdc0 mm/page_alloc.c:4396
 __alloc_pages+0x25d/0x340 mm/page_alloc.c:4781
 alloc_pages+0x3e1/0x4e0
 folio_alloc+0x1e/0x30 mm/mempolicy.c:2289
 filemap_alloc_folio+0x68/0x220 mm/filemap.c:976
 __filemap_get_folio+0x297/0x500 mm/filemap.c:1965
 filemap_fault+0x457/0xb70 mm/filemap.c:3289
 __do_fault mm/memory.c:4176 [inline]
 do_read_fault mm/memory.c:4530 [inline]
 do_fault mm/memory.c:4659 [inline]
 do_pte_missing mm/memory.c:3647 [inline]
 handle_pte_fault mm/memory.c:4947 [inline]
 __handle_mm_fault mm/memory.c:5089 [inline]
 handle_mm_fault+0x12f4/0x2c60 mm/memory.c:5243
 do_user_addr_fault arch/x86/mm/fault.c:1440 [inline]
 handle_page_fault arch/x86/mm/fault.c:1534 [inline]
 exc_page_fault+0x67e/0x780 arch/x86/mm/fault.c:1590
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570

write to 0xffff888103968578 of 8 bytes by task 3037 on cpu 1:
 __es_shrink+0x362/0x560
 ext4_es_scan+0x84/0x270 fs/ext4/extents_status.c:1571
 do_shrink_slab+0x2a0/0x640 mm/vmscan.c:912
 shrink_slab+0x11b/0x650 mm/vmscan.c:1075
 shrink_node_memcgs mm/vmscan.c:6469 [inline]
 shrink_node+0xadf/0x1500 mm/vmscan.c:6502
 shrink_zones mm/vmscan.c:6737 [inline]
 do_try_to_free_pages+0x40d/0xc80 mm/vmscan.c:6799
 try_to_free_pages+0x3f5/0x930 mm/vmscan.c:7034
 __perform_reclaim mm/page_alloc.c:3969 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:3991 [inline]
 __alloc_pages_slowpath+0x4e6/0xdc0 mm/page_alloc.c:4396
 __alloc_pages+0x25d/0x340 mm/page_alloc.c:4781
 alloc_pages+0x3e1/0x4e0
 folio_alloc+0x1e/0x30 mm/mempolicy.c:2289
 filemap_alloc_folio+0x68/0x220 mm/filemap.c:976
 __filemap_get_folio+0x297/0x500 mm/filemap.c:1965
 filemap_fault+0x457/0xb70 mm/filemap.c:3289
 __do_fault mm/memory.c:4176 [inline]
 do_read_fault mm/memory.c:4530 [inline]
 do_fault mm/memory.c:4659 [inline]
 do_pte_missing mm/memory.c:3647 [inline]
 handle_pte_fault mm/memory.c:4947 [inline]
 __handle_mm_fault mm/memory.c:5089 [inline]
 handle_mm_fault+0x12f4/0x2c60 mm/memory.c:5243
 do_user_addr_fault arch/x86/mm/fault.c:1440 [inline]
 handle_page_fault arch/x86/mm/fault.c:1534 [inline]
 exc_page_fault+0x67e/0x780 arch/x86/mm/fault.c:1590
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570

value changed: 0x0000000000000110 -> 0x000000000000010c

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 3037 Comm: syz-fuzzer Not tainted 6.4.0-rc5-syzkaller-00016-ga4d7d7011219 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
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