================================================================== BUG: KCSAN: data-race in __refill_stock / drain_all_stock read-write to 0xffff888237d2a3c0 of 4 bytes by task 12615 on cpu 1: __refill_stock+0x7f/0xb0 mm/memcontrol.c:2364 refill_stock mm/memcontrol.c:2375 [inline] obj_cgroup_uncharge_pages+0xfb/0x1a0 mm/memcontrol.c:3234 __memcg_kmem_uncharge_page+0x53/0x100 mm/memcontrol.c:3307 free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page_prepare+0x7c/0x2a0 mm/page_alloc.c:2347 free_unref_page+0x34/0x170 mm/page_alloc.c:2487 vfree+0x27c/0x410 mm/vmalloc.c:2842 __vmalloc_area_node mm/vmalloc.c:3203 [inline] __vmalloc_node_range+0xddb/0xea0 mm/vmalloc.c:3320 kvmalloc_node+0x121/0x160 mm/util.c:642 kvmalloc include/linux/slab.h:738 [inline] xt_alloc_table_info+0x3d/0x80 net/netfilter/x_tables.c:1192 do_replace net/ipv4/netfilter/ip_tables.c:1122 [inline] do_ipt_set_ctl+0x62f/0x1730 net/ipv4/netfilter/ip_tables.c:1627 nf_setsockopt+0x18d/0x1b0 net/netfilter/nf_sockopt.c:101 ip_setsockopt+0xe6/0x100 net/ipv4/ip_sockglue.c:1426 udp_setsockopt+0x95/0xa0 net/ipv4/udp.c:2788 sock_common_setsockopt+0x61/0x70 net/core/sock.c:3711 do_sock_setsockopt net/socket.c:2311 [inline] __sys_setsockopt+0x1d4/0x240 net/socket.c:2334 __do_sys_setsockopt net/socket.c:2343 [inline] __se_sys_setsockopt net/socket.c:2340 [inline] __x64_sys_setsockopt+0x66/0x80 net/socket.c:2340 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 0xffff888237d2a3c0 of 4 bytes by task 12589 on cpu 0: drain_all_stock+0xd3/0x2d0 mm/memcontrol.c:2405 try_charge_memcg+0x6c5/0xd30 mm/memcontrol.c:2750 try_charge mm/memcontrol.c:2884 [inline] charge_memcg mm/memcontrol.c:7210 [inline] mem_cgroup_swapin_charge_folio+0x107/0x190 mm/memcontrol.c:7295 __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: 0x00000029 -> 0x00000003 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 12589 Comm: syz-executor.4 Not tainted 6.7.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 ================================================================== syz-executor.4 invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=1000 CPU: 1 PID: 12589 Comm: syz-executor.4 Not tainted 6.7.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 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:7210 [inline] mem_cgroup_swapin_charge_folio+0x107/0x190 mm/memcontrol.c:7295 __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: 0033:0x7fbf6d476aaf Code: 49 39 c4 4c 0f 42 e0 48 8b 05 05 ec c8 00 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 2c 08 ff ff 49 39 c4 0f 82 60 01 00 00 69 3d c9 eb c8 00 e8 03 RSP: 002b:00007ffea27d1350 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 00007fbf6d5dd980 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00005555560de788 RBP: 00007fbf6d5dd980 R08: 0000000000000000 R09: 00007ffea27e50b0 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000002329ad R13: ffffffffffffffff R14: 00007fbf6d040000 R15: 000000000023266c memory: usage 307200kB, limit 307200kB, failcnt 76436 memory+swap: usage 307444kB, limit 9007199254740988kB, failcnt 0 kmem: usage 307184kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz4: cache 8192 rss 8192 shmem 0 mapped_file 0 dirty 8192 writeback 8192 workingset_refault_anon 37102 workingset_refault_file 35 swap 249856 swapcached 8192 pgpgin 620820 pgpgout 620816 pgfault 1191352 pgmajfault 17001 inactive_anon 0 active_anon 0 inactive_file 8192 active_file 0 unevictable 0 hierarchical_memory_limit 314572800 hierarchical_memsw_limit 9223372036854771712 total_cache 8192 total_rss 8192 total_shmem 0 total_mapped_file 0 total_dirty 8192 total_writeback 8192 total_workingset_refault_anon 37102 total_workingset_refault_file 35 total_swap 249856 total_swapcached 8192 total_pgpgin 620820 total_pgpgout 620816 total_pgfault 1191352 total_pgmajfault 17001 total_inactive_anon 0 total_active_anon 0 total_inactive_file 8192 total_active_file 0 total_unevictable 0 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz4,mems_allowed=0,oom_memcg=/syz4,task_memcg=/syz4,task=syz-executor.4,pid=12589,uid=0 Memory cgroup out of memory: Killed process 12589 (syz-executor.4) total-vm:46296kB, anon-rss:376kB, file-rss:8832kB, shmem-rss:0kB, UID:0 pgtables:76kB oom_score_adj:1000