================================================================== BUG: KCSAN: data-race in mem_cgroup_flush_stats_ratelimited / tick_do_update_jiffies64 read-write to 0xffffffff860079c0 of 8 bytes by interrupt on cpu 0: tick_do_update_jiffies64+0x112/0x1b0 kernel/time/tick-sched.c:118 tick_sched_do_timer kernel/time/tick-sched.c:232 [inline] tick_nohz_handler+0x7c/0x2d0 kernel/time/tick-sched.c:290 __run_hrtimer kernel/time/hrtimer.c:1689 [inline] __hrtimer_run_queues+0x20d/0x5e0 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x210/0x7b0 kernel/time/hrtimer.c:1815 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x5c/0x1a0 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x6e/0x80 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 preempt_count arch/x86/include/asm/preempt.h:26 [inline] check_kcov_mode kernel/kcov.c:173 [inline] write_comp_data kernel/kcov.c:236 [inline] __sanitizer_cov_trace_const_cmp8+0x18/0x90 kernel/kcov.c:311 inet_twsk_purge+0x64/0x380 net/ipv4/inet_timewait_sock.c:276 dccp_v4_exit_batch+0x15/0x20 net/dccp/ipv4.c:1047 ops_exit_list net/core/net_namespace.c:178 [inline] cleanup_net+0x4cf/0x830 net/core/net_namespace.c:640 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3329 worker_thread+0x526/0x720 kernel/workqueue.c:3409 kthread+0x1d1/0x210 kernel/kthread.c:389 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 read to 0xffffffff860079c0 of 8 bytes by task 12353 on cpu 1: mem_cgroup_flush_stats_ratelimited+0x29/0x100 mm/memcontrol.c:906 workingset_test_recent+0x114/0x410 mm/workingset.c:473 workingset_refault+0x1e9/0x460 mm/workingset.c:561 filemap_add_folio+0x116/0x1b0 mm/filemap.c:985 page_cache_ra_unbounded+0x148/0x2e0 mm/readahead.c:252 do_page_cache_ra mm/readahead.c:303 [inline] page_cache_ra_order mm/readahead.c:547 [inline] ondemand_readahead+0x542/0x6b0 mm/readahead.c:669 page_cache_async_ra+0x94/0xa0 mm/readahead.c:718 do_async_mmap_readahead mm/filemap.c:3203 [inline] filemap_fault+0x2d3/0xa60 mm/filemap.c:3299 __do_fault+0xb6/0x200 mm/memory.c:4556 do_shared_fault mm/memory.c:4981 [inline] do_fault mm/memory.c:5055 [inline] do_pte_missing mm/memory.c:3897 [inline] handle_pte_fault mm/memory.c:5381 [inline] __handle_mm_fault mm/memory.c:5524 [inline] handle_mm_fault+0xbba/0x2a80 mm/memory.c:5689 do_user_addr_fault arch/x86/mm/fault.c:1389 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x296/0x650 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 rep_stos_alternative+0x40/0x80 arch/x86/lib/clear_page_64.S:92 __clear_user arch/x86/include/asm/uaccess_64.h:172 [inline] clear_user arch/x86/include/asm/uaccess_64.h:189 [inline] read_zero+0x59/0x150 drivers/char/mem.c:504 vfs_read+0x1a2/0x6e0 fs/read_write.c:474 ksys_read+0xeb/0x1b0 fs/read_write.c:619 __do_sys_read fs/read_write.c:629 [inline] __se_sys_read fs/read_write.c:627 [inline] __x64_sys_read+0x42/0x50 fs/read_write.c:627 x64_sys_call+0x27e5/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:1 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00000000ffffc083 -> 0x00000000ffffc084 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 12353 Comm: syz.1.2346 Not tainted 6.10.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 ==================================================================