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================================================================== BUG: KCSAN: data-race in sk_stream_wait_memory / tcp_fragment write to 0xffff8880ab092208 of 4 bytes by interrupt on cpu 1: tcp_fragment+0x1b2/0x900 net/ipv4/tcp_output.c:1336 __tcp_retransmit_skb+0x597/0x15f0 net/ipv4/tcp_output.c:2929 tcp_retransmit_skb+0x36/0x1a0 net/ipv4/tcp_output.c:2999 tcp_xmit_retransmit_queue+0x23c/0x5a0 net/ipv4/tcp_output.c:3080 tcp_tsq_write.part.0+0x153/0x160 net/ipv4/tcp_output.c:796 tcp_tsq_write net/ipv4/tcp_output.c:788 [inline] tcp_tsq_handler+0x85/0xe0 net/ipv4/tcp_output.c:808 tcp_pace_kick+0x27/0x70 net/ipv4/tcp_output.c:972 __run_hrtimer kernel/time/hrtimer.c:1514 [inline] __hrtimer_run_queues+0x288/0x600 kernel/time/hrtimer.c:1576 hrtimer_run_softirq+0x10e/0x150 kernel/time/hrtimer.c:1593 __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] smp_apic_timer_interrupt+0xe6/0x280 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 arch_local_irq_restore arch/x86/include/asm/paravirt.h:756 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] _raw_spin_unlock_irqrestore+0x51/0x80 kernel/locking/spinlock.c:191 read to 0xffff8880ab092208 of 4 bytes by task 9738 on cpu 0: __sk_stream_memory_free include/net/sock.h:1210 [inline] sk_stream_memory_free include/net/sock.h:1219 [inline] sk_stream_wait_memory+0x437/0x7c0 net/core/stream.c:145 tcp_sendmsg_locked+0xb47/0x1f30 net/ipv4/tcp.c:1393 tcp_sendmsg+0x39/0x60 net/ipv4/tcp.c:1434 inet_sendmsg+0x6d/0x90 net/ipv4/af_inet.c:807 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0x9f/0xc0 net/socket.c:657 __sys_sendto+0x21f/0x320 net/socket.c:1952 __do_sys_sendto net/socket.c:1964 [inline] __se_sys_sendto net/socket.c:1960 [inline] __x64_sys_sendto+0x89/0xb0 net/socket.c:1960 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: 9738 Comm: syz-executor.0 Not tainted 5.4.0-rc3+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2019/11/03 12:23 | https://github.com/google/ktsan.git kcsan | 05f2236801fe | c9610487 | .config | console log | report | ci2-upstream-kcsan-gce |