================================================================== BUG: KCSAN: data-race in __refill_stock / drain_all_stock read-write to 0xffff888237c2a3c0 of 4 bytes by task 2727 on cpu 0: __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 bpf_ringbuf_area_alloc kernel/bpf/ringbuf.c:143 [inline] bpf_ringbuf_alloc+0x2b0/0x2f0 kernel/bpf/ringbuf.c:170 ringbuf_map_alloc+0x167/0x1d0 kernel/bpf/ringbuf.c:204 map_create+0x713/0xa40 kernel/bpf/syscall.c:1210 __sys_bpf+0x62a/0x780 kernel/bpf/syscall.c:5365 __do_sys_bpf kernel/bpf/syscall.c:5487 [inline] __se_sys_bpf kernel/bpf/syscall.c:5485 [inline] __x64_sys_bpf+0x43/0x50 kernel/bpf/syscall.c:5485 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b read to 0xffff888237c2a3c0 of 4 bytes by task 2744 on cpu 1: 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:3884 handle_pte_fault mm/memory.c:5042 [inline] __handle_mm_fault mm/memory.c:5180 [inline] handle_mm_fault+0xa36/0x2dd0 mm/memory.c:5345 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: 0x00000040 -> 0x00000032 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 2744 Comm: syz-executor.4 Not tainted 6.7.0-rc6-syzkaller-00022-g55cb5f43689d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 ================================================================== syz-executor.4 invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=1000 CPU: 1 PID: 2744 Comm: syz-executor.4 Not tainted 6.7.0-rc6-syzkaller-00022-g55cb5f43689d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 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:3884 handle_pte_fault mm/memory.c:5042 [inline] __handle_mm_fault mm/memory.c:5180 [inline] handle_mm_fault+0xa36/0x2dd0 mm/memory.c:5345 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: 0033:0x7ff506eddc04 Code: 01 00 00 69 3d a9 ea c8 00 e8 03 00 00 48 8d 1d 92 53 16 00 e8 7d 5f 04 00 eb 0f 0f 1f 00 48 81 c3 d0 00 00 00 48 39 eb 74 be <80> 7b 20 00 74 ee 8b 43 0c 85 c0 74 e7 48 89 df e8 f7 ee ff ff eb RSP: 002b:00007fff410a47c0 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 00007ff507042f80 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00005555568d6788 RBP: 00007ff507044980 R08: 0000000000000000 R09: 00007fff411a90b0 R10: 0000000000000000 R11: 0000000000000293 R12: 000000000029f599 R13: ffffffffffffffff R14: 00007ff506aa7000 R15: 000000000029f258 memory: usage 307200kB, limit 307200kB, failcnt 26290 memory+swap: usage 307356kB, limit 9007199254740988kB, failcnt 0 kmem: usage 307172kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz4: cache 4096 rss 8192 shmem 0 mapped_file 0 dirty 0 writeback 16384 workingset_refault_anon 971 workingset_refault_file 5 swap 159744 swapcached 24576 pgpgin 664767 pgpgout 664760 pgfault 1598037 pgmajfault 372 inactive_anon 0 active_anon 0 inactive_file 4096 active_file 0 unevictable 0 hierarchical_memory_limit 314572800 hierarchical_memsw_limit 9223372036854771712 total_cache 4096 total_rss 8192 total_shmem 0 total_mapped_file 0 total_dirty 0 total_writeback 16384 total_workingset_refault_anon 971 total_workingset_refault_file 5 total_swap 159744 total_swapcached 24576 total_pgpgin 664767 total_pgpgout 664760 total_pgfault 1598037 total_pgmajfault 372 total_inactive_anon 0 total_active_anon 0 total_inactive_file 4096 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=2744,uid=0 Memory cgroup out of memory: Killed process 2744 (syz-executor.4) total-vm:46432kB, anon-rss:284kB, file-rss:8960kB, shmem-rss:0kB, UID:0 pgtables:80kB oom_score_adj:1000