================================================================== BUG: KCSAN: data-race in page_counter_try_charge / page_counter_try_charge write to 0xffff88821b672150 of 8 bytes by task 11512 on cpu 1: page_counter_try_charge+0x7e/0x170 mm/page_counter.c:139 try_charge+0x185/0xbf0 mm/memcontrol.c:2405 mem_cgroup_try_charge+0xd2/0x260 mm/memcontrol.c:6367 mem_cgroup_try_charge_delay+0x3a/0x80 mm/memcontrol.c:6382 shmem_getpage_gfp+0x3bf/0x1390 mm/shmem.c:1872 shmem_getpage mm/shmem.c:154 [inline] shmem_write_begin+0x9f/0x140 mm/shmem.c:2488 generic_perform_write+0x136/0x320 mm/filemap.c:3287 __generic_file_write_iter+0x251/0x380 mm/filemap.c:3416 generic_file_write_iter+0x28c/0x38c mm/filemap.c:3448 call_write_iter include/linux/fs.h:1901 [inline] new_sync_write+0x388/0x4a0 fs/read_write.c:483 __vfs_write+0xb1/0xc0 fs/read_write.c:496 vfs_write fs/read_write.c:558 [inline] vfs_write+0x18a/0x390 fs/read_write.c:542 ksys_pwrite64+0xee/0x120 fs/read_write.c:665 __do_sys_pwrite64 fs/read_write.c:675 [inline] __se_sys_pwrite64 fs/read_write.c:672 [inline] __x64_sys_pwrite64+0x5e/0x80 fs/read_write.c:672 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88821b672150 of 8 bytes by task 11521 on cpu 0: page_counter_try_charge+0x58/0x170 mm/page_counter.c:138 try_charge+0x185/0xbf0 mm/memcontrol.c:2405 mem_cgroup_try_charge+0xd2/0x260 mm/memcontrol.c:6367 mem_cgroup_try_charge_delay+0x3a/0x80 mm/memcontrol.c:6382 shmem_getpage_gfp+0x3bf/0x1390 mm/shmem.c:1872 shmem_getpage mm/shmem.c:154 [inline] shmem_write_begin+0x9f/0x140 mm/shmem.c:2488 generic_perform_write+0x136/0x320 mm/filemap.c:3287 __generic_file_write_iter+0x251/0x380 mm/filemap.c:3416 generic_file_write_iter+0x28c/0x38c mm/filemap.c:3448 call_write_iter include/linux/fs.h:1901 [inline] new_sync_write+0x388/0x4a0 fs/read_write.c:483 __vfs_write+0xb1/0xc0 fs/read_write.c:496 vfs_write fs/read_write.c:558 [inline] vfs_write+0x18a/0x390 fs/read_write.c:542 ksys_pwrite64+0xee/0x120 fs/read_write.c:665 __do_sys_pwrite64 fs/read_write.c:675 [inline] __se_sys_pwrite64 fs/read_write.c:672 [inline] __x64_sys_pwrite64+0x5e/0x80 fs/read_write.c:672 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 11521 Comm: syz-executor.3 Not tainted 5.6.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================