==================================================================
BUG: KCSAN: data-race in page_counter_try_charge / page_counter_try_charge

write to 0xffff88821b672150 of 8 bytes by task 10869 on cpu 1:
 page_counter_try_charge+0x77/0x170 mm/page_counter.c:139
 try_charge+0x17f/0xbe0 mm/memcontrol.c:2405
 mem_cgroup_try_charge+0xd7/0x260 mm/memcontrol.c:6367
 __add_to_page_cache_locked+0x16c/0x770 mm/filemap.c:844
 add_to_page_cache_lru+0xc7/0x260 mm/filemap.c:921
 pagecache_get_page+0x2b0/0x700 mm/filemap.c:1660
 find_or_create_page include/linux/pagemap.h:310 [inline]
 grow_dev_page fs/buffer.c:989 [inline]
 grow_buffers fs/buffer.c:1058 [inline]
 __getblk_slow fs/buffer.c:1085 [inline]
 __getblk_gfp+0x1f3/0x560 fs/buffer.c:1362
 __bread_gfp+0x34/0x1d0 fs/buffer.c:1396
 sb_bread include/linux/buffer_head.h:307 [inline]
 isofs_bread+0x7b/0x90 fs/isofs/inode.c:1180
 do_isofs_readdir fs/isofs/dir.c:105 [inline]
 isofs_readdir+0x598/0x884 fs/isofs/dir.c:263
 iterate_dir+0x2fa/0x370 fs/readdir.c:65
 __do_sys_getdents fs/readdir.c:285 [inline]
 __se_sys_getdents fs/readdir.c:267 [inline]
 __x64_sys_getdents+0x14b/0x2b0 fs/readdir.c:267
 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88821b672150 of 8 bytes by task 10873 on cpu 0:
 page_counter_try_charge+0x56/0x170 mm/page_counter.c:138
 try_charge+0x17f/0xbe0 mm/memcontrol.c:2405
 mem_cgroup_try_charge+0xd7/0x260 mm/memcontrol.c:6367
 __add_to_page_cache_locked+0x16c/0x770 mm/filemap.c:844
 add_to_page_cache_lru+0xc7/0x260 mm/filemap.c:921
 pagecache_get_page+0x2b0/0x700 mm/filemap.c:1660
 find_or_create_page include/linux/pagemap.h:310 [inline]
 grow_dev_page fs/buffer.c:989 [inline]
 grow_buffers fs/buffer.c:1058 [inline]
 __getblk_slow fs/buffer.c:1085 [inline]
 __getblk_gfp+0x1f3/0x560 fs/buffer.c:1362
 __bread_gfp+0x34/0x1d0 fs/buffer.c:1396
 sb_bread include/linux/buffer_head.h:307 [inline]
 isofs_bread+0x7b/0x90 fs/isofs/inode.c:1180
 do_isofs_readdir fs/isofs/dir.c:105 [inline]
 isofs_readdir+0x598/0x884 fs/isofs/dir.c:263
 iterate_dir+0x2fa/0x370 fs/readdir.c:65
 __do_sys_getdents fs/readdir.c:285 [inline]
 __se_sys_getdents fs/readdir.c:267 [inline]
 __x64_sys_getdents+0x14b/0x2b0 fs/readdir.c:267
 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 10873 Comm: syz-executor.4 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================