================================================================== BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64 write to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 1: tick_do_update_jiffies64+0x105/0x260 kernel/time/tick-sched.c:73 tick_sched_do_timer+0xd4/0xe0 kernel/time/tick-sched.c:138 tick_sched_timer+0x43/0xe0 kernel/time/tick-sched.c:1289 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x288/0x600 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0xdc/0x280 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 find_watchpoint kernel/kcsan/core.c:84 [inline] __kcsan_check_watchpoint+0xa3/0x180 kernel/kcsan/core.c:322 __tsan_write2+0x18/0x40 kernel/kcsan/kcsan.c:29 dev_gro_receive+0xde1/0x1190 net/core/dev.c:5563 napi_gro_receive+0x7c/0x330 net/core/dev.c:5704 receive_buf+0x284/0x30b0 drivers/net/virtio_net.c:1061 virtnet_receive drivers/net/virtio_net.c:1323 [inline] virtnet_poll+0x436/0x7d0 drivers/net/virtio_net.c:1428 napi_poll net/core/dev.c:6352 [inline] net_rx_action+0x3ae/0xa50 net/core/dev.c:6418 read to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 0: tick_do_update_jiffies64+0x2b/0x260 kernel/time/tick-sched.c:62 tick_sched_do_timer+0xd4/0xe0 kernel/time/tick-sched.c:138 tick_sched_timer+0x43/0xe0 kernel/time/tick-sched.c:1289 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x288/0x600 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0xdc/0x280 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 __read_once_size include/linux/compiler.h:227 [inline] arch_atomic64_read arch/x86/include/asm/atomic64_64.h:22 [inline] atomic64_read include/asm-generic/atomic-instrumented.h:925 [inline] atomic_long_read include/asm-generic/atomic-long.h:28 [inline] find_watchpoint kernel/kcsan/core.c:85 [inline] __kcsan_check_watchpoint+0xbb/0x180 kernel/kcsan/core.c:322 __tsan_read8+0x15/0x30 kernel/kcsan/kcsan.c:31 sock_net include/net/sock.h:2454 [inline] tcp_rcv_established+0xb57/0xf50 net/ipv4/tcp_input.c:5612 tcp_v4_do_rcv+0x381/0x4e0 net/ipv4/tcp_ipv4.c:1542 sk_backlog_rcv include/net/sock.h:945 [inline] __release_sock+0x135/0x1e0 net/core/sock.c:2427 release_sock+0x61/0x160 net/core/sock.c:2943 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 7398 Comm: syz-fuzzer Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================