================================================================== BUG: KCSAN: data-race in page_counter_try_charge / page_counter_try_charge write to 0xffff88821b673158 of 8 bytes by task 13825 on cpu 0: page_counter_try_charge+0x23d/0x480 mm/page_counter.c:134 try_charge+0x1a1/0xb00 mm/memcontrol.c:2467 mem_cgroup_charge+0xbe/0x450 mm/memcontrol.c:6497 shmem_add_to_page_cache+0x341/0x910 mm/shmem.c:626 shmem_getpage_gfp+0x831/0x1940 mm/shmem.c:1857 shmem_getpage mm/shmem.c:153 [inline] shmem_fallocate+0x4d6/0x800 mm/shmem.c:2782 vfs_fallocate+0x431/0x580 fs/open.c:309 ksys_fallocate fs/open.c:332 [inline] __do_sys_fallocate fs/open.c:340 [inline] __se_sys_fallocate fs/open.c:338 [inline] __x64_sys_fallocate+0x75/0xc0 fs/open.c:338 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88821b673158 of 8 bytes by task 13827 on cpu 1: page_counter_try_charge+0x21c/0x480 mm/page_counter.c:133 try_charge+0x1a1/0xb00 mm/memcontrol.c:2467 mem_cgroup_charge+0xbe/0x450 mm/memcontrol.c:6497 shmem_add_to_page_cache+0x341/0x910 mm/shmem.c:626 shmem_getpage_gfp+0x831/0x1940 mm/shmem.c:1857 shmem_getpage mm/shmem.c:153 [inline] shmem_fallocate+0x4d6/0x800 mm/shmem.c:2782 vfs_fallocate+0x431/0x580 fs/open.c:309 ksys_fallocate fs/open.c:332 [inline] __do_sys_fallocate fs/open.c:340 [inline] __se_sys_fallocate fs/open.c:338 [inline] __x64_sys_fallocate+0x75/0xc0 fs/open.c:338 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 13827 Comm: syz-executor.1 Not tainted 5.8.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================