================================================================== BUG: KCSAN: data-race in mem_cgroup_iter / mem_cgroup_iter read to 0xffff888107502668 of 4 bytes by task 15284 on cpu 1: mem_cgroup_iter+0xba/0x380 mm/memcontrol.c:1018 shrink_node_memcgs mm/vmscan.c:5849 [inline] shrink_node+0x458/0x1d40 mm/vmscan.c:5928 shrink_zones mm/vmscan.c:6172 [inline] do_try_to_free_pages+0x3c6/0xc50 mm/vmscan.c:6234 try_to_free_mem_cgroup_pages+0x1f3/0x4f0 mm/vmscan.c:6566 try_charge_memcg+0x2bc/0x810 mm/memcontrol.c:2210 try_charge mm/memcontrol-v1.h:20 [inline] charge_memcg mm/memcontrol.c:4438 [inline] mem_cgroup_swapin_charge_folio+0x107/0x1a0 mm/memcontrol.c:4523 __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:4136 handle_pte_fault mm/memory.c:5541 [inline] __handle_mm_fault mm/memory.c:5681 [inline] handle_mm_fault+0x8cb/0x2a30 mm/memory.c:5849 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-write to 0xffff888107502668 of 4 bytes by task 15286 on cpu 0: mem_cgroup_iter+0x28e/0x380 mm/memcontrol.c:1080 shrink_node_memcgs mm/vmscan.c:5904 [inline] shrink_node+0x74a/0x1d40 mm/vmscan.c:5928 shrink_zones mm/vmscan.c:6172 [inline] do_try_to_free_pages+0x3c6/0xc50 mm/vmscan.c:6234 try_to_free_mem_cgroup_pages+0x1f3/0x4f0 mm/vmscan.c:6566 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:4719 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:3587 [inline] __vmalloc_area_node mm/vmalloc.c:3656 [inline] __vmalloc_node_range_noprof+0x736/0xec0 mm/vmalloc.c:3837 __kvmalloc_node_noprof+0x121/0x170 mm/util.c:675 ip_set_alloc+0x1f/0x30 net/netfilter/ipset/ip_set_core.c:256 hash_netiface_create+0x273/0x730 net/netfilter/ipset/ip_set_hash_gen.h:1568 ip_set_create+0x359/0x8a0 net/netfilter/ipset/ip_set_core.c:1104 nfnetlink_rcv_msg+0x4a9/0x570 net/netfilter/nfnetlink.c:302 netlink_rcv_skb+0x12c/0x230 net/netlink/af_netlink.c:2550 nfnetlink_rcv+0x16c/0x15e0 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x599/0x670 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x5cc/0x6e0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x140/0x180 net/socket.c:745 ____sys_sendmsg+0x312/0x410 net/socket.c:2597 ___sys_sendmsg net/socket.c:2651 [inline] __sys_sendmsg+0x1e9/0x280 net/socket.c:2680 __do_sys_sendmsg net/socket.c:2689 [inline] __se_sys_sendmsg net/socket.c:2687 [inline] __x64_sys_sendmsg+0x46/0x50 net/socket.c:2687 x64_sys_call+0x2689/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:47 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: 0x0000041d -> 0x00000422 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 15286 Comm: syz.4.4317 Not tainted 6.11.0-rc7-syzkaller-00135-gb7718454f937 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 ================================================================== syz.4.4317 invoked oom-killer: gfp_mask=0x402dc2(GFP_KERNEL_ACCOUNT|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_ZERO), order=0, oom_score_adj=1000 CPU: 0 UID: 0 PID: 15286 Comm: syz.4.4317 Not tainted 6.11.0-rc7-syzkaller-00135-gb7718454f937 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0xf2/0x150 lib/dump_stack.c:119 dump_stack+0x15/0x20 lib/dump_stack.c:128 dump_header+0x83/0x2d0 mm/oom_kill.c:462 oom_kill_process+0x341/0x4c0 mm/oom_kill.c:1035 out_of_memory+0x9af/0xbe0 mm/oom_kill.c:1173 mem_cgroup_out_of_memory+0x13e/0x190 mm/memcontrol.c:1602 mem_cgroup_oom mm/memcontrol.c:1625 [inline] try_charge_memcg+0x51b/0x810 mm/memcontrol.c:2258 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:4719 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:3587 [inline] __vmalloc_area_node mm/vmalloc.c:3656 [inline] __vmalloc_node_range_noprof+0x736/0xec0 mm/vmalloc.c:3837 __kvmalloc_node_noprof+0x121/0x170 mm/util.c:675 ip_set_alloc+0x1f/0x30 net/netfilter/ipset/ip_set_core.c:256 hash_netiface_create+0x273/0x730 net/netfilter/ipset/ip_set_hash_gen.h:1568 ip_set_create+0x359/0x8a0 net/netfilter/ipset/ip_set_core.c:1104 nfnetlink_rcv_msg+0x4a9/0x570 net/netfilter/nfnetlink.c:302 netlink_rcv_skb+0x12c/0x230 net/netlink/af_netlink.c:2550 nfnetlink_rcv+0x16c/0x15e0 net/netfilter/nfnetlink.c:667 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x599/0x670 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x5cc/0x6e0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x140/0x180 net/socket.c:745 ____sys_sendmsg+0x312/0x410 net/socket.c:2597 ___sys_sendmsg net/socket.c:2651 [inline] __sys_sendmsg+0x1e9/0x280 net/socket.c:2680 __do_sys_sendmsg net/socket.c:2689 [inline] __se_sys_sendmsg net/socket.c:2687 [inline] __x64_sys_sendmsg+0x46/0x50 net/socket.c:2687 x64_sys_call+0x2689/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:47 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 RIP: 0033:0x7f59574ddef9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5956157038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f5957695f80 RCX: 00007f59574ddef9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007f5957550b76 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f5957695f80 R15: 00007ffe0169de38 memory: usage 307200kB, limit 307200kB, failcnt 170 memory+swap: usage 307400kB, limit 9007199254740988kB, failcnt 0 kmem: usage 307108kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz4: cache 81920 rss 0 shmem 0 mapped_file 81920 dirty 81920 writeback 0 workingset_refault_anon 108 workingset_refault_file 1582 swap 204800 swapcached 8192 pgpgin 153470 pgpgout 153447 pgfault 191561 pgmajfault 143 inactive_anon 8192 active_anon 0 inactive_file 81920 active_file 4096 unevictable 0 hierarchical_memory_limit 314572800 hierarchical_memsw_limit 9223372036854771712 total_cache 81920 total_rss 0 total_shmem 0 total_mapped_file 81920 total_dirty 81920 total_writeback 0 total_workingset_refault_anon 108 total_workingset_refault_file 1582 total_swap 204800 total_swapcached 8192 total_pgpgin 153470 total_pgpgout 153447 total_pgfault 191561 total_pgmajfault 143 total_inactive_anon 8192 total_active_anon 0 total_inactive_file 81920 total_active_file 4096 total_unevictable 0 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz4,mems_allowed=0,oom_memcg=/syz4,task_memcg=/syz4,task=syz.4.4317,pid=15284,uid=0 Memory cgroup out of memory: Killed process 15284 (syz.4.4317) total-vm:86984kB, anon-rss:616kB, file-rss:15908kB, shmem-rss:0kB, UID:0 pgtables:116kB oom_score_adj:1000