================================================================== BUG: KCSAN: data-race in ktime_get_seconds / timekeeping_advance write to 0xffffffff86fce8c8 of 280 bytes by interrupt on cpu 0: timekeeping_advance+0x88e/0xd80 include/linux/string.h:381 update_wall_time+0x15/0x20 kernel/time/timekeeping.c:2136 tick_do_update_jiffies64+0x1e5/0x2a0 kernel/time/tick-sched.c:101 tick_sched_do_timer+0xc7/0xd0 kernel/time/tick-sched.c:147 tick_sched_timer+0x3f/0xd0 kernel/time/tick-sched.c:1313 __run_hrtimer kernel/time/hrtimer.c:1520 [inline] __hrtimer_run_queues+0x271/0x600 kernel/time/hrtimer.c:1584 hrtimer_interrupt+0x226/0x490 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1113 [inline] smp_apic_timer_interrupt+0xd8/0x270 arch/x86/kernel/apic/apic.c:1138 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 clear_page_erms+0x7/0x10 arch/x86/lib/clear_page_64.S:48 clear_page arch/x86/include/asm/page_64.h:49 [inline] clear_highpage include/linux/highmem.h:214 [inline] kernel_init_free_pages+0x61/0xa0 mm/page_alloc.c:1170 prep_new_page+0xa2/0xb0 mm/page_alloc.c:2210 get_page_from_freelist+0x14ce/0x17c0 mm/page_alloc.c:3753 __alloc_pages_nodemask+0x158/0x300 mm/page_alloc.c:4803 alloc_pages_current+0xca/0x170 mm/mempolicy.c:2295 alloc_pages include/linux/gfp.h:540 [inline] skb_page_frag_refill net/core/sock.c:2397 [inline] skb_page_frag_refill+0x15e/0x250 net/core/sock.c:2381 add_recvbuf_mergeable drivers/net/virtio_net.c:1194 [inline] try_fill_recv+0x523/0xdb0 drivers/net/virtio_net.c:1235 virtnet_receive drivers/net/virtio_net.c:1347 [inline] virtnet_poll+0x62d/0x790 drivers/net/virtio_net.c:1440 napi_poll net/core/dev.c:6571 [inline] net_rx_action+0x3ad/0xac0 net/core/dev.c:6639 __do_softirq+0x118/0x34a kernel/softirq.c:292 run_ksoftirqd+0x41/0x60 kernel/softirq.c:604 smpboot_thread_fn+0x374/0x4a0 kernel/smpboot.c:165 kthread+0x203/0x230 kernel/kthread.c:268 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 read to 0xffffffff86fce940 of 8 bytes by task 6712 on cpu 1: ktime_get_seconds+0x42/0x60 kernel/time/timekeeping.c:917 tcp_store_ts_recent net/ipv4/tcp_input.c:3490 [inline] tcp_rcv_established+0xe79/0xee0 net/ipv4/tcp_input.c:5674 tcp_v4_do_rcv+0x396/0x4f0 net/ipv4/tcp_ipv4.c:1621 sk_backlog_rcv include/net/sock.h:996 [inline] __release_sock+0x130/0x1e0 net/core/sock.c:2460 release_sock+0x5e/0x160 net/core/sock.c:2976 tcp_recvmsg+0x68e/0x1ba0 net/ipv4/tcp.c:2185 inet_recvmsg+0xc1/0x250 net/ipv4/af_inet.c:838 sock_recvmsg_nosec net/socket.c:886 [inline] sock_recvmsg net/socket.c:904 [inline] sock_recvmsg+0x8e/0xb0 net/socket.c:900 sock_read_iter+0x185/0x230 net/socket.c:982 call_read_iter include/linux/fs.h:1901 [inline] new_sync_read+0x416/0x450 fs/read_write.c:415 __vfs_read+0x9e/0xb0 fs/read_write.c:428 vfs_read fs/read_write.c:462 [inline] vfs_read+0x13e/0x2b0 fs/read_write.c:447 ksys_read+0x16a/0x1a0 fs/read_write.c:588 __do_sys_read fs/read_write.c:598 [inline] __se_sys_read fs/read_write.c:596 [inline] __x64_sys_read+0x49/0x60 fs/read_write.c:596 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 6712 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================