================================================================== BUG: KCSAN: data-race in pollwake / pollwake write to 0xffffc9000130fa40 of 4 bytes by interrupt on cpu 1: __pollwake fs/select.c:197 [inline] pollwake+0xe3/0x140 fs/select.c:217 __wake_up_common+0x7b/0x180 kernel/sched/wait.c:93 __wake_up_common_lock+0x77/0xb0 kernel/sched/wait.c:123 __wake_up_sync_key+0x19/0x20 kernel/sched/wait.c:196 sock_def_readable+0xa9/0x140 net/core/sock.c:2798 tcp_data_ready+0x7d/0xd0 net/ipv4/tcp_input.c:4752 tcp_data_queue+0xcd1/0x2110 net/ipv4/tcp_input.c:4815 tcp_rcv_established+0x517/0xf50 net/ipv4/tcp_input.c:5707 tcp_v4_do_rcv+0x3b5/0x520 net/ipv4/tcp_ipv4.c:1564 tcp_v4_rcv+0x19ec/0x1bd0 net/ipv4/tcp_ipv4.c:1945 ip_protocol_deliver_rcu+0x4d/0x420 net/ipv4/ip_input.c:204 ip_local_deliver_finish+0x110/0x140 net/ipv4/ip_input.c:231 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ip_local_deliver+0x133/0x210 net/ipv4/ip_input.c:252 dst_input include/net/dst.h:442 [inline] ip_rcv_finish+0x121/0x160 net/ipv4/ip_input.c:413 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ip_rcv+0x18f/0x1a0 net/ipv4/ip_input.c:523 __netif_receive_skb_one_core+0xa7/0xe0 net/core/dev.c:4929 __netif_receive_skb+0x37/0xf0 net/core/dev.c:5043 netif_receive_skb_internal+0x59/0x190 net/core/dev.c:5133 napi_skb_finish net/core/dev.c:5596 [inline] napi_gro_receive+0x28f/0x330 net/core/dev.c:5629 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:6311 [inline] net_rx_action+0x3ae/0xa90 net/core/dev.c:6379 __do_softirq+0x115/0x33f kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0xbb/0xe0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] do_IRQ+0x81/0x130 arch/x86/kernel/irq.c:263 ret_from_intr+0x0/0x19 arch_local_irq_enable arch/x86/include/asm/paravirt.h:766 [inline] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x4e/0x80 kernel/locking/spinlock.c:199 finish_lock_switch kernel/sched/core.c:3123 [inline] finish_task_switch+0x7b/0x260 kernel/sched/core.c:3223 context_switch kernel/sched/core.c:3387 [inline] __schedule+0x31e/0x690 kernel/sched/core.c:4078 preempt_schedule_irq+0x57/0x90 kernel/sched/core.c:4328 restore_regs_and_return_to_kernel+0x0/0x25 __tsan_read8+0x0/0x100 kernel/kcsan/core.c:595 tomoyo_check_acl+0xf6/0x270 security/tomoyo/domain.c:172 tomoyo_path_permission security/tomoyo/file.c:586 [inline] tomoyo_path_permission+0xe3/0x160 security/tomoyo/file.c:573 tomoyo_path_perm+0x23e/0x390 security/tomoyo/file.c:838 tomoyo_inode_getattr+0x26/0x40 security/tomoyo/tomoyo.c:129 security_inode_getattr+0x9b/0xd0 security/security.c:1222 vfs_getattr+0x2e/0x70 fs/stat.c:115 vfs_statx+0x102/0x190 fs/stat.c:191 vfs_lstat include/linux/fs.h:3247 [inline] __do_sys_newlstat+0x51/0xb0 fs/stat.c:354 __se_sys_newlstat fs/stat.c:348 [inline] __x64_sys_newlstat+0x3a/0x50 fs/stat.c:348 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffffc9000130fa40 of 4 bytes by task 7570 on cpu 0: __pollwake fs/select.c:197 [inline] pollwake+0xe3/0x140 fs/select.c:217 __wake_up_common+0x7b/0x180 kernel/sched/wait.c:93 __wake_up_common_lock+0x77/0xb0 kernel/sched/wait.c:123 __wake_up_sync_key+0x19/0x20 kernel/sched/wait.c:196 pipe_write+0x656/0x970 fs/pipe.c:503 call_write_iter include/linux/fs.h:1895 [inline] new_sync_write+0x388/0x4a0 fs/read_write.c:483 __vfs_write+0xb1/0xc0 fs/read_write.c:496 vfs_write fs/read_write.c:558 [inline] vfs_write+0x18a/0x390 fs/read_write.c:542 ksys_write+0xd5/0x1b0 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write fs/read_write.c:620 [inline] __x64_sys_write+0x4c/0x60 fs/read_write.c:620 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 7570 Comm: syz-fuzzer Not tainted 5.4.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================