================================================================== BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu write to 0xffff888237d1d798 of 2 bytes by interrupt on cpu 1: hrtimer_interrupt+0x968/0xaf0 kernel/time/hrtimer.c:1696 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline] __sysvec_apic_timer_interrupt+0x6f/0x1c0 arch/x86/kernel/apic/apic.c:1106 sysvec_apic_timer_interrupt+0x64/0x80 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647 __mem_cgroup_charge+0xbd/0xe0 mm/memcontrol.c:6534 mem_cgroup_charge+0x2d/0xa0 mm/memcontrol.c:6559 shmem_add_to_page_cache+0x306/0x650 mm/shmem.c:688 shmem_getpage_gfp+0xbdc/0x1410 mm/shmem.c:1929 shmem_getpage mm/shmem.c:155 [inline] shmem_write_begin+0x7e/0x100 mm/shmem.c:2526 generic_perform_write+0x196/0x3a0 mm/filemap.c:3660 __generic_file_write_iter+0x161/0x300 mm/filemap.c:3789 generic_file_write_iter+0x75/0x130 mm/filemap.c:3821 call_write_iter include/linux/fs.h:2114 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0x69d/0x770 fs/read_write.c:605 ksys_pwrite64 fs/read_write.c:712 [inline] __do_sys_pwrite64 fs/read_write.c:722 [inline] __se_sys_pwrite64 fs/read_write.c:719 [inline] __x64_sys_pwrite64+0xf5/0x150 fs/read_write.c:719 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888237d1d798 of 2 bytes by task 1547 on cpu 0: print_cpu+0x3a3/0x690 kernel/time/timer_list.c:136 timer_list_show+0x114/0x180 kernel/time/timer_list.c:283 seq_read_iter+0x60b/0x910 fs/seq_file.c:269 proc_reg_read_iter+0xfc/0x170 fs/proc/inode.c:300 call_read_iter include/linux/fs.h:2108 [inline] generic_file_splice_read+0x22a/0x310 fs/splice.c:311 do_splice_to fs/splice.c:796 [inline] splice_direct_to_actor+0x2aa/0x650 fs/splice.c:870 do_splice_direct+0xf5/0x170 fs/splice.c:979 do_sendfile+0x773/0xda0 fs/read_write.c:1260 __do_sys_sendfile64 fs/read_write.c:1325 [inline] __se_sys_sendfile64 fs/read_write.c:1311 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1311 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x0195 -> 0x0196 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 1547 Comm: syz-executor.0 Not tainted 5.13.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================