================================================================== BUG: KCSAN: data-race in drain_all_stock / drain_obj_stock write to 0xffff888237c2a4f8 of 8 bytes by task 17546 on cpu 0: drain_obj_stock+0x209/0x270 mm/memcontrol.c:3335 refill_obj_stock+0x7b/0x1d0 mm/memcontrol.c:3369 obj_cgroup_charge+0x10c/0x140 mm/memcontrol.c:3430 memcg_slab_pre_alloc_hook mm/slab.h:464 [inline] slab_pre_alloc_hook+0x112/0x180 mm/slab.h:675 slab_alloc_node mm/slab.c:3240 [inline] kmem_cache_alloc_node+0x5d/0x2e0 mm/slab.c:3528 alloc_task_struct_node kernel/fork.c:173 [inline] dup_task_struct+0x60/0x480 kernel/fork.c:1108 copy_process+0x3ac/0x21b0 kernel/fork.c:2333 kernel_clone+0x169/0x560 kernel/fork.c:2918 __do_sys_clone kernel/fork.c:3061 [inline] __se_sys_clone kernel/fork.c:3045 [inline] __x64_sys_clone+0xe8/0x120 kernel/fork.c:3045 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff888237c2a4f8 of 8 bytes by task 17534 on cpu 1: obj_stock_flush_required mm/memcontrol.c:3348 [inline] drain_all_stock+0x179/0x2d0 mm/memcontrol.c:2390 try_charge_memcg+0x6c2/0xd20 mm/memcontrol.c:2732 obj_cgroup_charge_pages+0xab/0x130 mm/memcontrol.c:3138 obj_cgroup_charge+0xe9/0x140 mm/memcontrol.c:3428 memcg_slab_pre_alloc_hook mm/slab.h:464 [inline] slab_pre_alloc_hook+0x112/0x180 mm/slab.h:675 slab_alloc_node mm/slab.c:3240 [inline] kmem_cache_alloc_node+0x5d/0x2e0 mm/slab.c:3528 alloc_task_struct_node kernel/fork.c:173 [inline] dup_task_struct+0x60/0x480 kernel/fork.c:1108 copy_process+0x3ac/0x21b0 kernel/fork.c:2333 kernel_clone+0x169/0x560 kernel/fork.c:2918 __do_sys_clone kernel/fork.c:3061 [inline] __se_sys_clone kernel/fork.c:3045 [inline] __x64_sys_clone+0xe8/0x120 kernel/fork.c:3045 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0xffff888138b28dc0 -> 0xffff888138d5cc80 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 17534 Comm: syz-executor.0 Not tainted 6.3.0-syzkaller-13466-gfc4354c6e5c2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 ================================================================== syz-executor.0 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000 CPU: 0 PID: 17534 Comm: syz-executor.0 Not tainted 6.3.0-syzkaller-13466-gfc4354c6e5c2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 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+0x95/0x3c0 mm/oom_kill.c:460 oom_kill_process+0xe3/0x3e0 mm/oom_kill.c:1036 out_of_memory+0x9f0/0xc30 mm/oom_kill.c:1174 mem_cgroup_out_of_memory+0x139/0x190 mm/memcontrol.c:1749 mem_cgroup_oom mm/memcontrol.c:1979 [inline] try_charge_memcg+0x759/0xd20 mm/memcontrol.c:2772 obj_cgroup_charge_pages+0xab/0x130 mm/memcontrol.c:3138 __memcg_kmem_charge_page+0x1d5/0x2c0 mm/memcontrol.c:3164 memcg_kmem_charge_page include/linux/memcontrol.h:1802 [inline] memcg_charge_kernel_stack+0xee/0x290 kernel/fork.c:260 alloc_thread_stack_node kernel/fork.c:298 [inline] dup_task_struct+0x125/0x480 kernel/fork.c:1116 copy_process+0x3ac/0x21b0 kernel/fork.c:2333 kernel_clone+0x169/0x560 kernel/fork.c:2918 __do_sys_clone kernel/fork.c:3061 [inline] __se_sys_clone kernel/fork.c:3045 [inline] __x64_sys_clone+0xe8/0x120 kernel/fork.c:3045 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f48833a5591 Code: 48 85 ff 74 3d 48 85 f6 74 38 48 83 ee 10 48 89 4e 08 48 89 3e 48 89 d7 4c 89 c2 4d 89 c8 4c 8b 54 24 08 b8 38 00 00 00 0f 05 <48> 85 c0 7c 13 74 01 c3 31 ed 58 5f ff d0 48 89 c7 b8 3c 00 00 00 RSP: 002b:00007ffdfe0955d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f48826f6700 RCX: 00007f48833a5591 RDX: 00007f48826f69d0 RSI: 00007f48826f62f0 RDI: 00000000003d0f00 RBP: 00007ffdfe095820 R08: 00007f48826f6700 R09: 00007f48826f6700 R10: 00007f48826f69d0 R11: 0000000000000206 R12: 00007ffdfe09568e R13: 00007ffdfe09568f R14: 00007f48826f6300 R15: 0000000000022000 memory: usage 307200kB, limit 307200kB, failcnt 49528 swap: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz0: anon 237568 file 10412032 kernel 303923200 kernel_stack 49152 pagetables 126976 sec_pagetables 0 percpu 10560288 sock 0 vmalloc 8192 shmem 10412032 file_mapped 94208 file_dirty 0 file_writeback 0 swapcached 0 inactive_anon 237568 active_anon 10412032 inactive_file 0 active_file 0 unevictable 0 slab_reclaimable 35920 slab_unreclaimable 293078784 slab 293114704 workingset_refault_anon 0 workingset_refault_file 55 workingset_activate_anon 0 workingset_activate_file 1 workingset_restore_anon 0 workingset_restore_file 1 workingset_nodereclaim 0 pgscan 548 pgsteal 150 pgscan_kswapd 0 pgscan_direct 548 pgscan_khugepaged 0 pgsteal_kswapd 0 pgsteal_direct 150 pgsteal_khugepaged 0 pgfault 499196 pgmajfault 0 pgrefill 563 pgactivate 23889 pgdeactivate 657 pglazyfree 0 pglazyfreed 0 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz0,mems_allowed=0,oom_memcg=/syz0,task_memcg=/syz0,task=syz-executor.0,pid=17534,uid=0 Memory cgroup out of memory: Killed process 17534 (syz-executor.0) total-vm:46484kB, anon-rss:504kB, file-rss:8960kB, shmem-rss:0kB, UID:0 pgtables:84kB oom_score_adj:1000