================================================================== BUG: KCSAN: data-race in do_try_to_free_pages / shrink_node write to 0xffff8881112f3e70 of 8 bytes by task 3081 on cpu 0: snapshot_refaults mm/vmscan.c:6191 [inline] do_try_to_free_pages+0x93c/0xc50 mm/vmscan.c:6253 try_to_free_mem_cgroup_pages+0x1eb/0x4e0 mm/vmscan.c:6545 try_charge_memcg+0x27a/0xcd0 mm/memcontrol.c:2944 try_charge mm/memcontrol.c:3092 [inline] charge_memcg mm/memcontrol.c:7495 [inline] __mem_cgroup_charge+0x63/0x100 mm/memcontrol.c:7510 mem_cgroup_charge include/linux/memcontrol.h:691 [inline] filemap_add_folio+0x53/0x1b0 mm/filemap.c:965 page_cache_ra_unbounded+0x148/0x2e0 mm/readahead.c:252 do_page_cache_ra mm/readahead.c:303 [inline] page_cache_ra_order+0xf7/0x110 mm/readahead.c:547 do_sync_mmap_readahead+0x267/0x2a0 mm/filemap.c:3175 filemap_fault+0x331/0xa60 mm/filemap.c:3313 __do_fault+0xb6/0x200 mm/memory.c:4556 do_read_fault mm/memory.c:4921 [inline] do_fault mm/memory.c:5051 [inline] do_pte_missing mm/memory.c:3897 [inline] handle_pte_fault mm/memory.c:5381 [inline] __handle_mm_fault mm/memory.c:5524 [inline] handle_mm_fault+0xdeb/0x2a80 mm/memory.c:5689 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 to 0xffff8881112f3e70 of 8 bytes by task 5215 on cpu 1: prepare_scan_control mm/vmscan.c:2274 [inline] shrink_node+0x383/0x13c0 mm/vmscan.c:5922 shrink_zones mm/vmscan.c:6168 [inline] do_try_to_free_pages+0x3c6/0xc50 mm/vmscan.c:6230 try_to_free_mem_cgroup_pages+0x1eb/0x4e0 mm/vmscan.c:6545 try_charge_memcg+0x27a/0xcd0 mm/memcontrol.c:2944 try_charge mm/memcontrol.c:3092 [inline] charge_memcg mm/memcontrol.c:7495 [inline] mem_cgroup_swapin_charge_folio+0x107/0x1a0 mm/memcontrol.c:7580 __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+0x3bc/0x1840 mm/memory.c:4065 handle_pte_fault mm/memory.c:5384 [inline] __handle_mm_fault mm/memory.c:5524 [inline] handle_mm_fault+0x809/0x2a80 mm/memory.c:5689 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 value changed: 0x0000000000000019 -> 0x000000000000001c Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 5215 Comm: syz.4.525 Not tainted 6.10.0-rc5-syzkaller-00282-g8282d5af7be8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 ================================================================== syz.4.525 invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=1000 CPU: 1 PID: 5215 Comm: syz.4.525 Not tainted 6.10.0-rc5-syzkaller-00282-g8282d5af7be8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xf2/0x150 lib/dump_stack.c:114 dump_stack+0x15/0x20 lib/dump_stack.c:123 dump_header+0x83/0x2d0 mm/oom_kill.c:462 oom_kill_process+0x33e/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:1975 mem_cgroup_oom mm/memcontrol.c:2203 [inline] try_charge_memcg+0x745/0xcd0 mm/memcontrol.c:2992 try_charge mm/memcontrol.c:3092 [inline] charge_memcg mm/memcontrol.c:7495 [inline] mem_cgroup_swapin_charge_folio+0x107/0x1a0 mm/memcontrol.c:7580 __read_swap_cache_async+0x2b9/0x520 mm/swap_state.c:514 swap_cluster_readahead+0x380/0x3f0 mm/swap_state.c:697 swapin_readahead+0xe2/0x7a0 mm/swap_state.c:904 do_swap_page+0x3bc/0x1840 mm/memory.c:4065 handle_pte_fault mm/memory.c:5384 [inline] __handle_mm_fault mm/memory.c:5524 [inline] handle_mm_fault+0x809/0x2a80 mm/memory.c:5689 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 RIP: 0033:0x7f89e410835b Code: ff 48 8b 00 89 83 9c 00 00 00 31 f6 e8 8e ec ff ff 48 81 c3 d8 00 00 00 48 39 dd 0f 84 54 fd ff ff 80 7b 20 00 48 89 df 74 e7 80 c4 ff ff 84 c0 74 d7 80 3d 45 3e 28 00 00 48 8b 83 a8 00 00 RSP: 002b:00007ffc0fe8f6d0 EFLAGS: 00010202 RAX: 0000000000010426 RBX: 00007f89e43c1fa0 RCX: 00000000000101d0 RDX: 0000000000000256 RSI: 00007ffc0fe8f6b0 RDI: 00007f89e43c1fa0 RBP: 00007f89e43c3aa0 R08: 0000000023b2aa3e R09: 7fffffffffffffff R10: 00007f89e43980b8 R11: 00007f89e4398080 R12: 000000000001039c R13: 0000000000000032 R14: 00007f89e43c3aa0 R15: 00007f89e43c2078 memory: usage 307200kB, limit 307200kB, failcnt 693 memory+swap: usage 307400kB, limit 9007199254740988kB, failcnt 0 kmem: usage 307192kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz4: cache 8192 rss 0 shmem 0 mapped_file 413696 dirty 0 writeback 0 workingset_refault_anon 167 workingset_refault_file 404 swap 208896 swapcached 0 pgpgin 56229 pgpgout 56227 pgfault 65254 pgmajfault 93 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 0 total_shmem 0 total_mapped_file 413696 total_dirty 0 total_writeback 0 total_workingset_refault_anon 167 total_workingset_refault_file 404 total_swap 208896 total_swapcached 0 total_pgpgin 56229 total_pgpgout 56227 total_pgfault 65254 total_pgmajfault 93 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.4.525,pid=5215,uid=0 Memory cgroup out of memory: Killed process 5215 (syz.4.525) total-vm:81156kB, anon-rss:580kB, file-rss:10308kB, shmem-rss:0kB, UID:0 pgtables:92kB oom_score_adj:1000