================================================================== BUG: KCSAN: data-race in __es_shrink / __es_shrink write to 0xffff8881443b3ca0 of 8 bytes by task 18397 on cpu 0: __es_shrink+0x3a0/0x560 fs/ext4/extents_status.c:1536 ext4_es_scan+0x87/0x210 fs/ext4/extents_status.c:1580 do_shrink_slab+0x28b/0x550 mm/vmscan.c:512 shrink_slab+0xea/0x1c0 mm/vmscan.c:673 shrink_node_memcgs+0x28a/0x420 mm/vmscan.c:2655 shrink_node+0x9fa/0x1220 mm/vmscan.c:2770 shrink_zones+0x2af/0x490 mm/vmscan.c:2973 do_try_to_free_pages+0x193/0x6f0 mm/vmscan.c:3028 try_to_free_pages+0x396/0x870 mm/vmscan.c:3267 __perform_reclaim mm/page_alloc.c:4385 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:4406 [inline] __alloc_pages_slowpath+0x544/0x9e0 mm/page_alloc.c:4810 __alloc_pages_nodemask+0x26a/0x350 mm/page_alloc.c:5020 alloc_pages_current+0x21d/0x310 mm/mempolicy.c:2277 alloc_pages include/linux/gfp.h:561 [inline] __vmalloc_area_node mm/vmalloc.c:2510 [inline] __vmalloc_node_range+0x2cf/0x540 mm/vmalloc.c:2576 __bpf_map_area_alloc+0xfd/0x120 kernel/bpf/syscall.c:306 bpf_map_area_alloc+0x18/0x20 kernel/bpf/syscall.c:313 queue_stack_map_alloc+0x78/0xf0 kernel/bpf/queue_stack_maps.c:76 find_and_alloc_map kernel/bpf/syscall.c:122 [inline] map_create kernel/bpf/syscall.c:828 [inline] __do_sys_bpf+0x420c/0x9990 kernel/bpf/syscall.c:4370 __se_sys_bpf kernel/bpf/syscall.c:4346 [inline] __x64_sys_bpf+0x3d/0x50 kernel/bpf/syscall.c:4346 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff8881443b3ca0 of 8 bytes by task 8383 on cpu 1: __es_shrink+0x374/0x560 fs/ext4/extents_status.c:1536 ext4_es_scan+0x87/0x210 fs/ext4/extents_status.c:1580 do_shrink_slab+0x28b/0x550 mm/vmscan.c:512 shrink_slab+0xea/0x1c0 mm/vmscan.c:673 shrink_node_memcgs+0x28a/0x420 mm/vmscan.c:2655 shrink_node+0x9fa/0x1220 mm/vmscan.c:2770 shrink_zones+0x2af/0x490 mm/vmscan.c:2973 do_try_to_free_pages+0x193/0x6f0 mm/vmscan.c:3028 try_to_free_pages+0x396/0x870 mm/vmscan.c:3267 __perform_reclaim mm/page_alloc.c:4385 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:4406 [inline] __alloc_pages_slowpath+0x544/0x9e0 mm/page_alloc.c:4810 __alloc_pages_nodemask+0x26a/0x350 mm/page_alloc.c:5020 alloc_pages_current+0x21d/0x310 mm/mempolicy.c:2277 alloc_pages include/linux/gfp.h:561 [inline] __page_cache_alloc+0x4d/0xf0 mm/filemap.c:978 pagecache_get_page+0x5e4/0xa30 mm/filemap.c:1797 filemap_fault+0x203/0xc30 mm/filemap.c:2900 ext4_filemap_fault+0x4b/0x60 fs/ext4/inode.c:6196 __do_fault mm/memory.c:3637 [inline] do_read_fault+0x2e1/0x530 mm/memory.c:3939 do_fault mm/memory.c:4067 [inline] handle_pte_fault mm/memory.c:4318 [inline] __handle_mm_fault mm/memory.c:4453 [inline] handle_mm_fault+0x1019/0x1840 mm/memory.c:4551 do_user_addr_fault+0x60c/0xc00 arch/x86/mm/fault.c:1390 handle_page_fault arch/x86/mm/fault.c:1475 [inline] exc_page_fault+0x94/0x2a0 arch/x86/mm/fault.c:1531 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:577 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 8383 Comm: syz-fuzzer Not tainted 5.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================