loop4: detected capacity change from 0 to 264192
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BUG: KCSAN: data-race in drain_all_stock / drain_stock

write to 0xffff888237c283e8 of 8 bytes by task 14937 on cpu 0:
 drain_stock+0x88/0x110 mm/memcontrol.c:2209
 __refill_stock mm/memcontrol.c:2245 [inline]
 refill_stock+0x85/0x130 mm/memcontrol.c:2260
 try_charge_memcg+0x7bb/0xa40 mm/memcontrol.c:2711
 obj_cgroup_charge_pages mm/memcontrol.c:3040 [inline]
 obj_cgroup_charge+0x171/0x2b0 mm/memcontrol.c:3330
 memcg_slab_pre_alloc_hook mm/slab.h:496 [inline]
 slab_pre_alloc_hook mm/slab.h:705 [inline]
 slab_alloc mm/slab.c:3278 [inline]
 __kmem_cache_alloc_lru mm/slab.c:3471 [inline]
 kmem_cache_alloc+0x92/0x2f0 mm/slab.c:3491
 kmem_cache_zalloc include/linux/slab.h:723 [inline]
 __alloc_file+0x2e/0x150 fs/file_table.c:138
 alloc_empty_file+0xcd/0x1c0 fs/file_table.c:187
 path_openat+0x65/0x1b00 fs/namei.c:3677
 do_filp_open+0x105/0x220 fs/namei.c:3718
 do_sys_openat2+0xb5/0x2a0 fs/open.c:1313
 do_sys_open fs/open.c:1329 [inline]
 __do_sys_openat fs/open.c:1345 [inline]
 __se_sys_openat fs/open.c:1340 [inline]
 __x64_sys_openat+0xef/0x110 fs/open.c:1340
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888237c283e8 of 8 bytes by task 14927 on cpu 1:
 drain_all_stock+0xcc/0x310 mm/memcontrol.c:2289
 try_charge_memcg+0x63a/0xa40 mm/memcontrol.c:2635
 try_charge mm/memcontrol.c:2769 [inline]
 mem_cgroup_charge_skmem+0x4d/0x130 mm/memcontrol.c:7119
 sock_reserve_memory+0xb0/0x3a0 net/core/sock.c:1016
 sock_setsockopt+0xeeb/0x1a40 net/core/sock.c:1482
 __sys_setsockopt+0x242/0x2b0 net/socket.c:2248
 __do_sys_setsockopt net/socket.c:2263 [inline]
 __se_sys_setsockopt net/socket.c:2260 [inline]
 __x64_sys_setsockopt+0x62/0x70 net/socket.c:2260
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0xffff888139514000 -> 0xffff888139349000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 14927 Comm: syz-executor.4 Not tainted 6.0.0-rc7-syzkaller-00250-ga962b54e162c-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
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