================================================================== BUG: KCSAN: data-race in mem_cgroup_iter / mem_cgroup_iter read-write to 0xffff888115856e68 of 4 bytes by task 11551 on cpu 1: mem_cgroup_iter+0x28e/0x380 mm/memcontrol.c:1080 shrink_node_memcgs mm/vmscan.c:5924 [inline] shrink_node+0x74a/0x1d40 mm/vmscan.c:5948 shrink_zones mm/vmscan.c:6192 [inline] do_try_to_free_pages+0x3c6/0xc50 mm/vmscan.c:6254 try_to_free_mem_cgroup_pages+0x1f3/0x4f0 mm/vmscan.c:6586 try_charge_memcg+0x2bc/0x810 mm/memcontrol.c:2210 try_charge mm/memcontrol-v1.h:20 [inline] charge_memcg mm/memcontrol.c:4439 [inline] mem_cgroup_swapin_charge_folio+0x107/0x1a0 mm/memcontrol.c:4524 __read_swap_cache_async+0x2b7/0x520 mm/swap_state.c:516 swap_cluster_readahead+0x276/0x3f0 mm/swap_state.c:680 swapin_readahead+0xe4/0x760 mm/swap_state.c:882 do_swap_page+0x3da/0x1ef0 mm/memory.c:4119 handle_pte_fault mm/memory.c:5524 [inline] __handle_mm_fault mm/memory.c:5664 [inline] handle_mm_fault+0x8cb/0x2a30 mm/memory.c:5832 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x3b9/0x650 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 read to 0xffff888115856e68 of 4 bytes by task 11552 on cpu 0: mem_cgroup_iter+0xba/0x380 mm/memcontrol.c:1018 shrink_node_memcgs mm/vmscan.c:5869 [inline] shrink_node+0x458/0x1d40 mm/vmscan.c:5948 shrink_zones mm/vmscan.c:6192 [inline] do_try_to_free_pages+0x3c6/0xc50 mm/vmscan.c:6254 try_to_free_mem_cgroup_pages+0x1f3/0x4f0 mm/vmscan.c:6586 try_charge_memcg+0x2bc/0x810 mm/memcontrol.c:2210 obj_cgroup_charge_pages+0xbd/0x1a0 mm/memcontrol.c:2660 __memcg_kmem_charge_page+0x9d/0x170 mm/memcontrol.c:2687 __alloc_pages_noprof+0x1bc/0x360 mm/page_alloc.c:4712 alloc_pages_mpol_noprof+0xb1/0x1e0 mm/mempolicy.c:2263 alloc_pages_noprof+0xe1/0x100 mm/mempolicy.c:2343 vm_area_alloc_pages mm/vmalloc.c:3584 [inline] __vmalloc_area_node mm/vmalloc.c:3653 [inline] __vmalloc_node_range_noprof+0x736/0xec0 mm/vmalloc.c:3834 __bpf_map_area_alloc kernel/bpf/syscall.c:307 [inline] bpf_map_area_alloc+0xd8/0x110 kernel/bpf/syscall.c:314 prealloc_init+0xd6/0x470 kernel/bpf/hashtab.c:329 htab_map_alloc+0x630/0x8e0 kernel/bpf/hashtab.c:576 map_create+0x83c/0xb90 kernel/bpf/syscall.c:1333 __sys_bpf+0x667/0x7a0 kernel/bpf/syscall.c:5692 __do_sys_bpf kernel/bpf/syscall.c:5817 [inline] __se_sys_bpf kernel/bpf/syscall.c:5815 [inline] __x64_sys_bpf+0x43/0x50 kernel/bpf/syscall.c:5815 x64_sys_call+0x2625/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:322 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 value changed: 0x000001b7 -> 0x000001b8 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 11552 Comm: syz.0.2548 Not tainted 6.11.0-rc6-syzkaller-00026-g88fac17500f4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 ==================================================================