================================================================== BUG: KCSAN: data-race in do_try_to_free_pages / shrink_node write to 0xffff888137f29070 of 8 bytes by task 29650 on cpu 1: snapshot_refaults mm/vmscan.c:6109 [inline] do_try_to_free_pages+0x95f/0xce0 mm/vmscan.c:6171 try_to_free_mem_cgroup_pages+0x1e2/0x480 mm/vmscan.c:6463 try_charge_memcg+0x280/0xd30 mm/memcontrol.c:2742 obj_cgroup_charge_pages+0xab/0x130 mm/memcontrol.c:3254 __memcg_kmem_charge_page+0x9c/0x170 mm/memcontrol.c:3280 __alloc_pages+0x1bb/0x340 mm/page_alloc.c:4585 alloc_pages_mpol+0xb1/0x1d0 mm/mempolicy.c:2133 alloc_pages+0xe0/0x100 mm/mempolicy.c:2204 vm_area_alloc_pages mm/vmalloc.c:3063 [inline] __vmalloc_area_node mm/vmalloc.c:3139 [inline] __vmalloc_node_range+0x6d2/0xea0 mm/vmalloc.c:3320 kvmalloc_node+0x121/0x160 mm/util.c:632 kvmalloc include/linux/slab.h:738 [inline] xt_alloc_table_info+0x3d/0x80 net/netfilter/x_tables.c:1192 do_replace net/ipv4/netfilter/arp_tables.c:970 [inline] do_arpt_set_ctl+0x634/0x13b0 net/ipv4/netfilter/arp_tables.c:1421 nf_setsockopt+0x18d/0x1b0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0xe6/0x100 net/ipv4/ip_sockglue.c:1426 tcp_setsockopt+0x90/0xa0 net/ipv4/tcp.c:3704 sock_common_setsockopt+0x61/0x70 net/core/sock.c:3711 do_sock_setsockopt net/socket.c:2315 [inline] __sys_setsockopt+0x1d4/0x240 net/socket.c:2338 __do_sys_setsockopt net/socket.c:2347 [inline] __se_sys_setsockopt net/socket.c:2344 [inline] __x64_sys_setsockopt+0x66/0x80 net/socket.c:2344 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b read to 0xffff888137f29070 of 8 bytes by task 29647 on cpu 0: prepare_scan_control mm/vmscan.c:2249 [inline] shrink_node+0x3b3/0x15c0 mm/vmscan.c:5845 shrink_zones mm/vmscan.c:6086 [inline] do_try_to_free_pages+0x43d/0xce0 mm/vmscan.c:6148 try_to_free_mem_cgroup_pages+0x1e2/0x480 mm/vmscan.c:6463 try_charge_memcg+0x280/0xd30 mm/memcontrol.c:2742 try_charge mm/memcontrol.c:2884 [inline] charge_memcg mm/memcontrol.c:7209 [inline] mem_cgroup_swapin_charge_folio+0x107/0x190 mm/memcontrol.c:7294 __read_swap_cache_async+0x2f6/0x550 mm/swap_state.c:490 swap_cluster_readahead+0x27c/0x4c0 mm/swap_state.c:655 swapin_readahead+0xe9/0x7f0 mm/swap_state.c:878 do_swap_page+0x4a0/0x1670 mm/memory.c:3883 handle_pte_fault mm/memory.c:5041 [inline] __handle_mm_fault mm/memory.c:5179 [inline] handle_mm_fault+0xa36/0x2dd0 mm/memory.c:5344 do_user_addr_fault arch/x86/mm/fault.c:1364 [inline] handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x3ff/0x6c0 arch/x86/mm/fault.c:1561 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 value changed: 0x0000000000000b2f -> 0x0000000000000b30 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 29647 Comm: syz-executor.1 Not tainted 6.6.0-syzkaller-15494-g6bc986ab839c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 ================================================================== syz-executor.1 invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=1000 CPU: 0 PID: 29647 Comm: syz-executor.1 Not tainted 6.6.0-syzkaller-15494-g6bc986ab839c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xda/0x130 lib/dump_stack.c:106 dump_stack+0x15/0x20 lib/dump_stack.c:113 dump_header+0x82/0x2d0 mm/oom_kill.c:460 oom_kill_process+0x33a/0x4c0 mm/oom_kill.c:1031 out_of_memory+0x9ca/0xbf0 mm/oom_kill.c:1169 mem_cgroup_out_of_memory+0x139/0x190 mm/memcontrol.c:1791 mem_cgroup_oom mm/memcontrol.c:2021 [inline] try_charge_memcg+0x75c/0xd30 mm/memcontrol.c:2790 try_charge mm/memcontrol.c:2884 [inline] charge_memcg mm/memcontrol.c:7209 [inline] mem_cgroup_swapin_charge_folio+0x107/0x190 mm/memcontrol.c:7294 __read_swap_cache_async+0x2f6/0x550 mm/swap_state.c:490 swap_cluster_readahead+0x27c/0x4c0 mm/swap_state.c:655 swapin_readahead+0xe9/0x7f0 mm/swap_state.c:878 do_swap_page+0x4a0/0x1670 mm/memory.c:3883 handle_pte_fault mm/memory.c:5041 [inline] __handle_mm_fault mm/memory.c:5179 [inline] handle_mm_fault+0xa36/0x2dd0 mm/memory.c:5344 do_user_addr_fault arch/x86/mm/fault.c:1364 [inline] handle_page_fault arch/x86/mm/fault.c:1505 [inline] exc_page_fault+0x3ff/0x6c0 arch/x86/mm/fault.c:1561 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7ff01acecabd Code: 31 d2 48 f7 f1 4c 01 f8 49 39 c4 4c 0f 42 e0 83 3d df 6e 16 00 00 0f 8e 12 ff ff ff e8 2c 08 ff ff 49 39 c4 0f 82 60 01 00 00 <69> 3d c9 eb c8 00 e8 03 00 00 48 8d 1d b2 54 16 00 e8 9d 5f 04 00 RSP: 002b:00007ffce9f92630 EFLAGS: 00010212 RAX: 00000000000e0716 RBX: 00007ff01ae53980 RCX: 00000000000e05d8 RDX: 000000000000013e RSI: 00007ffce9f92610 RDI: 7fffffffffffffff RBP: 00007ff01ae53980 R08: 0000000000000010 R09: 00007ffce9fef0b0 R10: 00007ffce9fef080 R11: 00000000000293d6 R12: 00000000000e0742 R13: ffffffffffffffff R14: 00007ff01a8b6000 R15: 00000000000e0401 memory: usage 307200kB, limit 307200kB, failcnt 51761 memory+swap: usage 307460kB, limit 9007199254740988kB, failcnt 0 kmem: usage 307168kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz1: cache 8192 rss 16384 shmem 0 mapped_file 0 dirty 0 writeback 4096 workingset_refault_anon 24145 workingset_refault_file 122 swap 266240 swapcached 24576 pgpgin 101144 pgpgout 101136 pgfault 168465 pgmajfault 10810 inactive_anon 0 active_anon 0 inactive_file 0 active_file 8192 unevictable 0 hierarchical_memory_limit 314572800 hierarchical_memsw_limit 9223372036854771712 total_cache 8192 total_rss 16384 total_shmem 0 total_mapped_file 0 total_dirty 0 total_writeback 4096 total_workingset_refault_anon 24145 total_workingset_refault_file 122 total_swap 266240 total_swapcached 24576 total_pgpgin 101144 total_pgpgout 101136 total_pgfault 168465 total_pgmajfault 10810 total_inactive_anon 0 total_active_anon 0 total_inactive_file 0 total_active_file 8192 total_unevictable 0 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz1,mems_allowed=0,oom_memcg=/syz1,task_memcg=/syz1,task=syz-executor.1,pid=29647,uid=0 Memory cgroup out of memory: Killed process 29647 (syz-executor.1) total-vm:46428kB, anon-rss:504kB, file-rss:8960kB, shmem-rss:0kB, UID:0 pgtables:80kB oom_score_adj:1000