================================================================== BUG: KCSAN: data-race in __es_shrink / __es_shrink write to 0xffff888103945ca0 of 8 bytes by task 15944 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 prealloc_init kernel/bpf/hashtab.c:284 [inline] htab_map_alloc+0x663/0xc80 kernel/bpf/hashtab.c:508 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 0xffff888103945ca0 of 8 bytes by task 15882 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] __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 prealloc_init kernel/bpf/hashtab.c:284 [inline] htab_map_alloc+0x663/0xc80 kernel/bpf/hashtab.c:508 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 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 15882 Comm: syz-executor.0 Not tainted 5.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================