Warning: Permanently added '10.128.15.200' (ECDSA) to the list of known hosts. 2019/03/23 08:44:18 parsed 1 programs 2019/03/23 08:44:18 executed programs: 0 login: Kernel page fault with the following non-sleepable locks held: shared rw TCP ID tree (TCP ID tree) r = 0 (0xffffffff828c3be0) locked @ /syzkaller/managers/main/kernel/sys/netinet/tcp_log_buf.c:636 stack backtrace: #0 0xffffffff8110b9fe at witness_debugger+0x8e #1 0xffffffff8110d080 at witness_warn+0x640 #2 0xffffffff817156e0 at trap_pfault+0x80 #3 0xffffffff8171464d at trap+0x44d #4 0xffffffff816de215 at calltrap+0x8 #5 0xffffffff8139a8c9 at tcp_log_set_id+0x819 #6 0xffffffff813c23a4 at tcp_default_ctloutput+0x13a4 #7 0xffffffff813c0b1f at tcp_ctloutput+0x30f #8 0xffffffff8115a291 at sosetopt+0x101 #9 0xffffffff811628f8 at kern_setsockopt+0x158 #10 0xffffffff81162793 at sys_setsockopt+0x33 #11 0xffffffff81716846 at amd64_syscall+0x436 #12 0xffffffff816deafd at fast_syscall_common+0x101 Fatal trap 12: page fault while in kernel mode cpuid = 1; apic id = 01 fault virtual address = 0x80 fault code = supervisor read data , page not present instruction pointer = 0x20:0xffffffff8103c6f9 stack pointer = 0x28:0xfffffe002126d5e0 frame pointer = 0x28:0xfffffe002126d610 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 772 (syz-executor.0) trap number = 12 panic: page fault cpuid = 1 time = 1553330658 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe002126d240 vpanic() at vpanic+0x1e0/frame 0xfffffe002126d2a0 panic() at panic+0x43/frame 0xfffffe002126d300 trap_fatal() at trap_fatal+0x4c6/frame 0xfffffe002126d380 trap_pfault() at trap_pfault+0x9f/frame 0xfffffe002126d3f0 trap() at trap+0x44d/frame 0xfffffe002126d510 calltrap() at calltrap+0x8/frame 0xfffffe002126d510 --- trap 0xc, rip = 0xffffffff8103c6f9, rsp = 0xfffffe002126d5e0, rbp = 0xfffffe002126d610 --- __mtx_assert() at __mtx_assert+0xb9/frame 0xfffffe002126d610 tcp_log_set_id() at tcp_log_set_id+0x819/frame 0xfffffe002126d680 tcp_default_ctloutput() at tcp_default_ctloutput+0x13a4/frame 0xfffffe002126d7d0 tcp_ctloutput() at tcp_ctloutput+0x30f/frame 0xfffffe002126d850 sosetopt() at sosetopt+0x101/frame 0xfffffe002126d8d0 kern_setsockopt() at kern_setsockopt+0x158/frame 0xfffffe002126d950 sys_setsockopt() at sys_setsockopt+0x33/frame 0xfffffe002126d980 amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe002126dab0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe002126dab0 --- syscall (198, FreeBSD ELF64, nosys), rip = 0x412e7a, rsp = 0x7fffdffdcf38, rbp = 0x5 --- KDB: enter: panic [ thread pid 772 tid 100118 ] Stopped at kdb_enter+0x6a: movq $0,kdb_why