================================================================== BUG: KCSAN: data-race in drain_all_stock / try_charge_memcg write to 0xffff888237c2a690 of 4 bytes by task 26992 on cpu 0: consume_stock mm/memcontrol.c:2322 [inline] try_charge_memcg+0xb46/0xd20 mm/memcontrol.c:2743 try_charge mm/memcontrol.c:2930 [inline] charge_memcg mm/memcontrol.c:7276 [inline] __mem_cgroup_charge+0x63/0xf0 mm/memcontrol.c:7291 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:5180 [inline] __handle_mm_fault mm/memory.c:5305 [inline] handle_mm_fault+0xb80/0x27c0 mm/memory.c:5470 do_user_addr_fault arch/x86/mm/fault.c:1355 [inline] handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x401/0x6d0 arch/x86/mm/fault.c:1554 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 read to 0xffff888237c2a690 of 4 bytes by task 26971 on cpu 1: drain_all_stock+0xd3/0x2e0 mm/memcontrol.c:2430 try_charge_memcg+0x6c2/0xd20 mm/memcontrol.c:2790 try_charge mm/memcontrol.c:2930 [inline] charge_memcg mm/memcontrol.c:7276 [inline] __mem_cgroup_charge+0x63/0xf0 mm/memcontrol.c:7291 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:5180 [inline] __handle_mm_fault mm/memory.c:5305 [inline] handle_mm_fault+0xb80/0x27c0 mm/memory.c:5470 do_user_addr_fault arch/x86/mm/fault.c:1355 [inline] handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x401/0x6d0 arch/x86/mm/fault.c:1554 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 value changed: 0x0000003e -> 0x0000003d Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 26971 Comm: syz-executor.0 Not tainted 6.8.0-rc7-syzkaller-00142-g3aaa8ce7a335 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 ================================================================== syz-executor.0 invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=1000 CPU: 0 PID: 26971 Comm: syz-executor.0 Not tainted 6.8.0-rc7-syzkaller-00142-g3aaa8ce7a335 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 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:1816 mem_cgroup_oom mm/memcontrol.c:2046 [inline] try_charge_memcg+0x759/0xd20 mm/memcontrol.c:2830 try_charge mm/memcontrol.c:2930 [inline] charge_memcg mm/memcontrol.c:7276 [inline] mem_cgroup_swapin_charge_folio+0x107/0x190 mm/memcontrol.c:7361 __read_swap_cache_async+0x2b9/0x510 mm/swap_state.c:498 swap_cluster_readahead+0x380/0x3f0 mm/swap_state.c:681 swapin_readahead+0xe2/0x7a0 mm/swap_state.c:888 do_swap_page+0x3bb/0x15e0 mm/memory.c:3913 handle_pte_fault mm/memory.c:5167 [inline] __handle_mm_fault mm/memory.c:5305 [inline] handle_mm_fault+0x7f6/0x27c0 mm/memory.c:5470 do_user_addr_fault arch/x86/mm/fault.c:1355 [inline] handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x401/0x6d0 arch/x86/mm/fault.c:1554 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7f1982d25ac7 Code: 25 ff 0f 00 00 09 c5 80 3d 06 bc c9 00 00 0f 85 6f ff ff ff 44 0f b6 6c 24 0f 44 8d 55 04 89 e8 41 89 c1 41 81 e1 ff 1f 00 00 <43> 8b 14 8e 39 d5 0f 84 5e ff ff ff 85 d2 0f 84 65 01 00 00 83 c0 RSP: 002b:00007fffcaebe740 EFLAGS: 00010202 RAX: 0000000083b74d1a RBX: 00007f1982e98018 RCX: 0000000000000000 RDX: ffffffff83b74470 RSI: 0000000080000000 RDI: 0000000000018151 RBP: 0000000083b74d1a R08: 0000001b31d20000 R09: 0000000000000d1a R10: 0000000083b74d1e R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f1982e8c000 R15: ffffffff83b74470 memory: usage 307200kB, limit 307200kB, failcnt 38926 memory+swap: usage 307436kB, limit 9007199254740988kB, failcnt 0 kmem: usage 307172kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz0: cache 0 rss 28672 shmem 0 mapped_file 0 dirty 0 writeback 0 workingset_refault_anon 18013 workingset_refault_file 67 swap 241664 swapcached 24576 pgpgin 368167 pgpgout 368160 pgfault 868457 pgmajfault 12254 inactive_anon 20480 active_anon 0 inactive_file 0 active_file 0 unevictable 0 hierarchical_memory_limit 314572800 hierarchical_memsw_limit 9223372036854771712 total_cache 0 total_rss 28672 total_shmem 0 total_mapped_file 0 total_dirty 0 total_writeback 0 total_workingset_refault_anon 18013 total_workingset_refault_file 67 total_swap 241664 total_swapcached 24576 total_pgpgin 368167 total_pgpgout 368160 total_pgfault 868457 total_pgmajfault 12254 total_inactive_anon 20480 total_active_anon 0 total_inactive_file 0 total_active_file 0 total_unevictable 0 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz0,mems_allowed=0,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor.0,pid=26971,uid=0 Memory cgroup out of memory: Killed process 26971 (syz-executor.0) total-vm:46312kB, anon-rss:504kB, file-rss:8960kB, shmem-rss:0kB, UID:0 pgtables:84kB oom_score_adj:1000