================================================================== BUG: KCSAN: data-race in __count_memcg_events / mem_cgroup_css_rstat_flush write to 0xffffe8ffffd5ba00 of 4 bytes by task 14783 on cpu 0: mem_cgroup_css_rstat_flush+0x4ea/0x540 mm/memcontrol.c:5848 cgroup_rstat_flush_locked+0x848/0x980 kernel/cgroup/rstat.c:245 cgroup_rstat_flush+0x26/0x40 kernel/cgroup/rstat.c:277 do_flush_stats mm/memcontrol.c:745 [inline] mem_cgroup_flush_stats+0xb2/0xc0 mm/memcontrol.c:766 prepare_scan_control mm/vmscan.c:2234 [inline] shrink_node+0x2f2/0x15a0 mm/vmscan.c:5906 shrink_zones mm/vmscan.c:6152 [inline] do_try_to_free_pages+0x3cc/0xca0 mm/vmscan.c:6214 try_to_free_mem_cgroup_pages+0x1eb/0x4e0 mm/vmscan.c:6529 try_charge_memcg+0x279/0xd10 mm/memcontrol.c:2783 try_charge mm/memcontrol.c:2931 [inline] charge_memcg mm/memcontrol.c:7284 [inline] mem_cgroup_swapin_charge_folio+0x107/0x1a0 mm/memcontrol.c:7369 __read_swap_cache_async+0x2b9/0x520 mm/swap_state.c:514 swap_cluster_readahead+0x276/0x3f0 mm/swap_state.c:678 swapin_readahead+0xe2/0x7a0 mm/swap_state.c:904 do_swap_page+0x3bb/0x15f0 mm/memory.c:4048 handle_pte_fault mm/memory.c:5303 [inline] __handle_mm_fault mm/memory.c:5441 [inline] handle_mm_fault+0x7fa/0x27e0 mm/memory.c:5606 do_user_addr_fault arch/x86/mm/fault.c:1331 [inline] handle_page_fault arch/x86/mm/fault.c:1474 [inline] exc_page_fault+0x3eb/0x690 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 write to 0xffffe8ffffd5ba00 of 4 bytes by task 14784 on cpu 1: memcg_rstat_updated mm/memcontrol.c:736 [inline] __count_memcg_events+0xa9/0x130 mm/memcontrol.c:962 shrink_inactive_list mm/vmscan.c:1918 [inline] shrink_list mm/vmscan.c:2163 [inline] shrink_lruvec+0xb69/0x1640 mm/vmscan.c:5687 shrink_node_memcgs mm/vmscan.c:5873 [inline] shrink_node+0xa78/0x15a0 mm/vmscan.c:5908 shrink_zones mm/vmscan.c:6152 [inline] do_try_to_free_pages+0x3cc/0xca0 mm/vmscan.c:6214 try_to_free_mem_cgroup_pages+0x1eb/0x4e0 mm/vmscan.c:6529 try_charge_memcg+0x279/0xd10 mm/memcontrol.c:2783 obj_cgroup_charge_pages+0xbd/0x1d0 mm/memcontrol.c:3302 __memcg_kmem_charge_page+0x9d/0x170 mm/memcontrol.c:3328 __alloc_pages+0x1bc/0x360 mm/page_alloc.c:4592 alloc_pages_mpol+0xb1/0x1e0 mm/mempolicy.c:2264 alloc_pages+0xe1/0x100 mm/mempolicy.c:2335 vm_area_alloc_pages mm/vmalloc.c:3561 [inline] __vmalloc_area_node mm/vmalloc.c:3637 [inline] __vmalloc_node_range+0x6f2/0xee0 mm/vmalloc.c:3818 kvmalloc_node+0x121/0x170 mm/util.c:659 kvmalloc include/linux/slab.h:766 [inline] kvzalloc include/linux/slab.h:774 [inline] ip_set_alloc+0x1f/0x30 net/netfilter/ipset/ip_set_core.c:255 hash_netiface_create+0x277/0x740 net/netfilter/ipset/ip_set_hash_gen.h:1568 ip_set_create+0x359/0x8a0 net/netfilter/ipset/ip_set_core.c:1103 nfnetlink_rcv_msg+0x4a9/0x570 net/netfilter/nfnetlink.c:302 netlink_rcv_skb+0x12c/0x230 net/netlink/af_netlink.c:2559 nfnetlink_rcv+0x170/0x13e0 net/netfilter/nfnetlink.c:659 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x58d/0x660 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x5d3/0x6e0 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x140/0x180 net/socket.c:745 ____sys_sendmsg+0x312/0x410 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x1e9/0x280 net/socket.c:2667 __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x46/0x50 net/socket.c:2674 x64_sys_call+0xae9/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00000040 -> 0x00000000 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 14784 Comm: syz-executor.4 Not tainted 6.9.0-rc7-syzkaller-00117-g448b3fe5a0ea #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 ================================================================== syz-executor.4 (14784) used greatest stack depth: 7560 bytes left