================================================================== BUG: KCSAN: data-race in drain_all_stock / try_charge_memcg write to 0xffff888237d2a990 of 4 bytes by task 18195 on cpu 1: consume_stock mm/memcontrol.c:2317 [inline] try_charge_memcg+0xb46/0xd20 mm/memcontrol.c:2723 try_charge mm/memcontrol.c:2904 [inline] charge_memcg mm/memcontrol.c:7241 [inline] __mem_cgroup_charge+0x63/0xf0 mm/memcontrol.c:7256 mem_cgroup_charge include/linux/memcontrol.h:690 [inline] folio_prealloc mm/memory.c:1011 [inline] wp_page_copy mm/memory.c:3138 [inline] do_wp_page+0x63a/0x1f20 mm/memory.c:3525 handle_pte_fault mm/memory.c:5160 [inline] __handle_mm_fault mm/memory.c:5285 [inline] handle_mm_fault+0xb80/0x27b0 mm/memory.c:5450 do_user_addr_fault arch/x86/mm/fault.c:1364 [inline] handle_page_fault arch/x86/mm/fault.c:1507 [inline] exc_page_fault+0x3ff/0x6d0 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 read to 0xffff888237d2a990 of 4 bytes by task 18197 on cpu 0: drain_all_stock+0xd3/0x2e0 mm/memcontrol.c:2425 try_charge_memcg+0x6c2/0xd20 mm/memcontrol.c:2770 try_charge mm/memcontrol.c:2904 [inline] charge_memcg mm/memcontrol.c:7241 [inline] __mem_cgroup_charge+0x63/0xf0 mm/memcontrol.c:7256 mem_cgroup_charge include/linux/memcontrol.h:690 [inline] folio_prealloc mm/memory.c:1011 [inline] wp_page_copy mm/memory.c:3138 [inline] do_wp_page+0x63a/0x1f20 mm/memory.c:3525 handle_pte_fault mm/memory.c:5160 [inline] __handle_mm_fault mm/memory.c:5285 [inline] handle_mm_fault+0xb80/0x27b0 mm/memory.c:5450 do_user_addr_fault arch/x86/mm/fault.c:1364 [inline] handle_page_fault arch/x86/mm/fault.c:1507 [inline] exc_page_fault+0x3ff/0x6d0 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 value changed: 0x0000003e -> 0x0000003d Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 18197 Comm: syz-executor.4 Not tainted 6.7.0-syzkaller-01727-gab27740f7665 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 ================================================================== syz-executor.4 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000 CPU: 0 PID: 18197 Comm: syz-executor.4 Not tainted 6.7.0-syzkaller-01727-gab27740f7665 #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:461 oom_kill_process+0x33a/0x4c0 mm/oom_kill.c:1032 out_of_memory+0x9ca/0xbf0 mm/oom_kill.c:1170 mem_cgroup_out_of_memory+0x139/0x190 mm/memcontrol.c:1811 mem_cgroup_oom mm/memcontrol.c:2041 [inline] try_charge_memcg+0x759/0xd20 mm/memcontrol.c:2810 try_charge mm/memcontrol.c:2904 [inline] charge_memcg mm/memcontrol.c:7241 [inline] __mem_cgroup_charge+0x63/0xf0 mm/memcontrol.c:7256 mem_cgroup_charge include/linux/memcontrol.h:690 [inline] folio_prealloc mm/memory.c:1011 [inline] wp_page_copy mm/memory.c:3138 [inline] do_wp_page+0x63a/0x1f20 mm/memory.c:3525 handle_pte_fault mm/memory.c:5160 [inline] __handle_mm_fault mm/memory.c:5285 [inline] handle_mm_fault+0xb80/0x27b0 mm/memory.c:5450 do_user_addr_fault arch/x86/mm/fault.c:1364 [inline] handle_page_fault arch/x86/mm/fault.c:1507 [inline] exc_page_fault+0x3ff/0x6d0 arch/x86/mm/fault.c:1563 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7f9209384bb0 Code: 89 1c 24 48 83 c4 28 5b 5d 41 5c 41 5d 41 5e 41 5f c3 0f 1f 84 00 00 00 00 00 41 89 c5 e9 7f fe ff ff 0f 1f 84 00 00 00 00 00 <43> 89 2c 8e e9 a5 fe ff ff 0f 1f 80 00 00 00 00 48 39 c3 74 99 48 RSP: 002b:00007fffba002980 EFLAGS: 00010246 RAX: 0000000083b13b6c RBX: 00007f92094f8018 RCX: 0000000000000004 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 000000000000252e RBP: 0000000083b13b6c R08: 0000001b2cd20000 R09: 0000000000001b6c R10: 0000000083b13b70 R11: 0000000000000246 R12: 0000000000000004 R13: 0000000000000001 R14: 00007f92094ec000 R15: ffffffff83b13a95 memory: usage 307196kB, limit 307200kB, failcnt 240584 memory+swap: usage 429544kB, limit 9007199254740988kB, failcnt 0 kmem: usage 16312kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz4: cache 297467904 rss 118784 shmem 297463808 mapped_file 1437696 dirty 0 writeback 0 workingset_refault_anon 59 workingset_refault_file 739 swap 125284352 swapcached 270336 pgpgin 942793 pgpgout 870074 pgfault 1386099 pgmajfault 3144 inactive_anon 231493632 active_anon 30982144 inactive_file 0 active_file 4096 unevictable 35356672 hierarchical_memory_limit 314572800 hierarchical_memsw_limit 9223372036854771712 total_cache 297467904 total_rss 118784 total_shmem 297463808 total_mapped_file 1437696 total_dirty 0 total_writeback 0 total_workingset_refault_anon 59 total_workingset_refault_file 739 total_swap 125284352 total_swapcached 270336 total_pgpgin 942793 total_pgpgout 870074 total_pgfault 1386099 total_pgmajfault 3144 total_inactive_anon 231493632 total_active_anon 30982144 total_inactive_file 0 total_active_file 4096 total_unevictable 35356672 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz4,mems_allowed=0,oom_memcg=/syz4,task_memcg=/syz4,task=syz-executor.4,pid=18197,uid=0 Memory cgroup out of memory: Killed process 18197 (syz-executor.4) total-vm:46308kB, anon-rss:384kB, file-rss:8960kB, shmem-rss:0kB, UID:0 pgtables:72kB oom_score_adj:1000