================================================================== BUG: KCSAN: data-race in __refill_stock / drain_all_stock read-write to 0xffff888237c2a2f0 of 4 bytes by task 12905 on cpu 0: __refill_stock+0x7c/0xb0 mm/memcontrol.c:2317 refill_stock mm/memcontrol.c:2328 [inline] obj_cgroup_uncharge_pages+0xfb/0x1a0 mm/memcontrol.c:3088 __memcg_kmem_uncharge_page+0x53/0x100 mm/memcontrol.c:3161 memcg_kmem_uncharge_page include/linux/memcontrol.h:1803 [inline] exit_task_stack_account+0x60/0x110 kernel/fork.c:516 do_exit+0xfe9/0x1660 kernel/exit.c:911 do_group_exit+0x101/0x150 kernel/exit.c:1019 get_signal+0xeb1/0xff0 kernel/signal.c:2859 arch_do_signal_or_restart+0x89/0x2a0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop+0x6f/0xe0 kernel/entry/common.c:168 exit_to_user_mode_prepare+0x6c/0xb0 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:297 ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:301 read to 0xffff888237c2a2f0 of 4 bytes by task 12882 on cpu 1: drain_all_stock+0xd3/0x2a0 mm/memcontrol.c:2358 try_charge_memcg+0x6c2/0xd20 mm/memcontrol.c:2703 obj_cgroup_charge_pages+0xab/0x130 mm/memcontrol.c:3109 __memcg_kmem_charge_page+0x1d5/0x2c0 mm/memcontrol.c:3135 memcg_kmem_charge_page include/linux/memcontrol.h:1796 [inline] memcg_charge_kernel_stack+0xee/0x290 kernel/fork.c:258 alloc_thread_stack_node kernel/fork.c:296 [inline] dup_task_struct+0x125/0x450 kernel/fork.c:982 copy_process+0x3ac/0x21b0 kernel/fork.c:2190 kernel_clone+0x169/0x560 kernel/fork.c:2774 __do_sys_clone kernel/fork.c:2917 [inline] __se_sys_clone kernel/fork.c:2901 [inline] __x64_sys_clone+0xe8/0x120 kernel/fork.c:2901 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: 0x00000026 -> 0x0000002a Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 12882 Comm: syz-executor.5 Not tainted 6.3.0-syzkaller-00436-g173ea743bf7a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 ================================================================== oom_kill_process: 1 callbacks suppressed syz-executor.5 invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=1000 CPU: 0 PID: 12882 Comm: syz-executor.5 Not tainted 6.3.0-syzkaller-00436-g173ea743bf7a #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:1720 mem_cgroup_oom mm/memcontrol.c:1950 [inline] try_charge_memcg+0x759/0xd20 mm/memcontrol.c:2743 obj_cgroup_charge_pages+0xab/0x130 mm/memcontrol.c:3109 __memcg_kmem_charge_page+0x1d5/0x2c0 mm/memcontrol.c:3135 memcg_kmem_charge_page include/linux/memcontrol.h:1796 [inline] memcg_charge_kernel_stack+0xee/0x290 kernel/fork.c:258 alloc_thread_stack_node kernel/fork.c:296 [inline] dup_task_struct+0x125/0x450 kernel/fork.c:982 copy_process+0x3ac/0x21b0 kernel/fork.c:2190 kernel_clone+0x169/0x560 kernel/fork.c:2774 __do_sys_clone kernel/fork.c:2917 [inline] __se_sys_clone kernel/fork.c:2901 [inline] __x64_sys_clone+0xe8/0x120 kernel/fork.c:2901 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: 0033:0x7f2337205591 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:00007fffbf42b2b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f2336577700 RCX: 00007f2337205591 RDX: 00007f23365779d0 RSI: 00007f23365772f0 RDI: 00000000003d0f00 RBP: 00007fffbf42b500 R08: 00007f2336577700 R09: 00007f2336577700 R10: 00007f23365779d0 R11: 0000000000000206 R12: 00007fffbf42b36e R13: 00007fffbf42b36f R14: 00007f2336577300 R15: 0000000000022000 memory: usage 307200kB, limit 307200kB, failcnt 14996 swap: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz5: anon 146763776 file 8417280 kernel 159391744 kernel_stack 19447808 pagetables 77758464 sec_pagetables 0 percpu 76416 sock 0 vmalloc 0 shmem 8409088 file_mapped 106496 file_dirty 4096 file_writeback 0 swapcached 0 inactive_anon 155054080 active_anon 118784 inactive_file 4096 active_file 4096 unevictable 0 slab_reclaimable 6982928 slab_unreclaimable 30766248 slab 37749176 workingset_refault_anon 0 workingset_refault_file 10 workingset_activate_anon 0 workingset_activate_file 0 workingset_restore_anon 0 workingset_restore_file 0 workingset_nodereclaim 0 pgscan 23175 pgsteal 1357 pgscan_kswapd 0 pgscan_direct 23175 pgscan_khugepaged 0 pgsteal_kswapd 0 pgsteal_direct 1357 pgsteal_khugepaged 0 pgfault 184622 pgmajfault 4 pgrefill 22496 pgactivate 22731 pgdeactivate 22495 pglazyfree 0 pglazyfreed 0 oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=syz5,mems_allowed=0,oom_memcg=/syz5,task_memcg=/syz5,task=syz-executor.5,pid=12882,uid=0 Memory cgroup out of memory: Killed process 12882 (syz-executor.5) total-vm:46352kB, anon-rss:376kB, file-rss:8960kB, shmem-rss:0kB, UID:0 pgtables:84kB oom_score_adj:1000